IPC Classification

Class code (prefix) Descriptions Number of results
H01H 1/00 Contacts
H01H 1/02 Contacts characterised by the material thereof
H01H 1/04 Co-operating contacts of different material
H01H 1/06 Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved
H01H 1/08 Contacts characterised by the shape or structure of the contact-making surface, e.g. grooved wetted with mercury
H01H 1/10 Laminated contacts with divided contact surface
H01H 1/12 Contacts characterised by the manner in which co-operating contacts engage
H01H 1/14 Contacts characterised by the manner in which co-operating contacts engage by abutting
H01H 1/16 Contacts characterised by the manner in which co-operating contacts engage by abutting by wrapping; Roller or ball contacts
H01H 1/18 Contacts characterised by the manner in which co-operating contacts engage by abutting with subsequent sliding
H01H 1/20 Bridging contacts
H01H 1/021 Composite material
H01H 1/22 Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
H01H 1/023 Composite material having a noble metal as the basic material
H01H 1/24 Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
H01H 1/025 Composite material having copper as the basic material
H01H 1/26 Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
H01H 1/027 Composite material containing carbon particles or fibres
H01H 1/28 Assembly of three or more contact-supporting spring blades
H01H 1/029 Composite material comprising conducting material dispersed in an elastic support or binding material
H01H 1/30 Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting within supporting guides
H01H 1/32 Self-aligning contacts
H01H 1/34 Contacts characterised by the manner in which co-operating contacts engage by abutting with provision for adjusting position of contact relative to its co-operating contact
H01H 1/36 Contacts characterised by the manner in which co-operating contacts engage by sliding
H01H 1/38 Plug-and-socket contacts
H01H 1/40 Contact mounted so that its contact-making surface is flush with adjoining insulation
H01H 1/42 Knife-and-clip contacts
H01H 1/44 Contacts characterised by the manner in which co-operating contacts engage by sliding with resilient mounting
H01H 1/46 Contacts characterised by the manner in which co-operating contacts engage by sliding self-aligning contacts
H01H 1/48 Contacts characterised by the manner in which co-operating contacts engage by sliding with provision for adjusting position of contact relative to its co-operating contact
H01H 1/50 Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
H01H 1/52 Contacts adapted to act as latches
H01H 1/54 Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
H01H 1/56 Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H 1/58 Electric connections to or between contacts; Terminals
H01H 1/60 Auxiliary means structurally associated with the switch for cleaning or lubricating contact-making surfaces
H01H 1/62 Heating or cooling of contacts
H01H 1/64 Protective enclosures, baffle plates, or screens for contacts
H01H 1/66 Contacts sealed in an evacuated or gas-filled envelope, e.g. magnetic dry-reed contacts
H01H 1/0233 Composite material having a noble metal as the basic material and containing carbides
H01H 1/0237 Composite material having a noble metal as the basic material and containing oxides
H01H 3/00 Mechanisms for operating contacts
H01H 3/02 Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
H01H 3/04 Levers
H01H 3/06 Means for securing to shaft of driving mechanism
H01H 3/08 Turn knobs
H01H 3/10 Means for securing to shaft of driving mechanism
H01H 3/12 Push-buttons
H01H 3/14 Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 3/16 Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-lev
H01H 3/18 Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. for a door switch, a limit switch, a floor-lev the movement in one direction being intentionally by hand, e.g. for setting automatically cancelled trafficators
H01H 3/20 Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling
H01H 3/22 Power arrangements internal to the switch for operating the driving mechanism
H01H 3/24 Power arrangements internal to the switch for operating the driving mechanism using pneumatic or hydraulic actuator
H01H 3/26 Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
H01H 3/28 Power arrangements internal to the switch for operating the driving mechanism using electromagnet
H01H 3/30 Power arrangements internal to the switch for operating the driving mechanism using spring motor
H01H 3/32 Driving mechanisms, i.e. for transmitting driving force to the contacts
H01H 3/34 Driving mechanisms, i.e. for transmitting driving force to the contacts using ratchet
H01H 3/36 Driving mechanisms, i.e. for transmitting driving force to the contacts using belt, chain, or cord
H01H 3/38 Driving mechanisms, i.e. for transmitting driving force to the contacts using spring or other flexible shaft coupling
H01H 3/40 Driving mechanisms, i.e. for transmitting driving force to the contacts using friction, toothed, or screw-and-nut gearing
H01H 3/42 Driving mechanisms, i.e. for transmitting driving force to the contacts using cam or eccentric
H01H 3/44 Driving mechanisms, i.e. for transmitting driving force to the contacts using Geneva movement
H01H 3/46 Driving mechanisms, i.e. for transmitting driving force to the contacts using rod or lever linkage, e.g. toggle
H01H 3/48 Driving mechanisms, i.e. for transmitting driving force to the contacts using lost-motion device
H01H 3/50 Driving mechanisms, i.e. for transmitting driving force to the contacts with indexing or locating means, e.g. indexing by ball and spring
H01H 3/52 Driving mechanisms, i.e. for transmitting driving force to the contacts with means to ensure stopping at intermediate operative positions
H01H 3/54 Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts
H01H 3/56 Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using electromagnetic clutch
H01H 3/58 Mechanisms for coupling or uncoupling operating parts, driving mechanisms, or contacts using friction, toothed, or other mechanical clutch
H01H 3/60 Mechanical arrangements for preventing or damping vibration or shock
H01H 3/62 Lubricating means structurally associated with the switch
H01H 5/00 Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
H01H 5/02 Energy stored by the attraction or repulsion of magnetic parts
H01H 5/04 Energy stored by deformation of elastic members
H01H 5/06 Energy stored by deformation of elastic members by compression or extension of coil springs
H01H 5/08 Energy stored by deformation of elastic members by compression or extension of coil springs one end of spring transmitting movement to the contact member when the other end is moved by the operating part
H01H 5/10 Energy stored by deformation of elastic members by compression or extension of coil springs one end of spring being fixedly connected to the stationary or movable part of the switch, and the other end reacting with a movable or stationary rigid member respectively through pins, cams, toothed, or other shaped surfaces
H01H 5/12 Energy stored by deformation of elastic members by compression or extension of coil springs having two or more snap-action motions in succession
H01H 5/14 Energy stored by deformation of elastic members by twisting of torsion members
H01H 5/16 Energy stored by deformation of elastic members by twisting of torsion members with auxiliary means for temporarily holding parts until torsion member is sufficiently strained
H01H 5/18 Energy stored by deformation of elastic members by flexing of blade springs
H01H 5/20 Energy stored by deformation of elastic members by flexing of blade springs single blade moved across dead-centre position
H01H 5/22 Energy stored by deformation of elastic members by flexing of blade springs blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg
H01H 5/24 Energy stored by deformation of elastic members by flexing of blade springs blade spring with at least one snap-acting leg and at least one separate contact-carrying or contact-actuating leg having three legs
H01H 5/26 Energy stored by deformation of elastic members by flexing of blade springs having two or more snap-action motions in succession
H01H 5/28 Energy stored by deformation of elastic members by flexing of blade springs two separate blade springs forming a toggle
H01H 5/30 Energy stored by deformation of elastic members by buckling of disc springs
H01H 7/00 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
H01H 7/02 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means
H01H 7/03 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means with dash-pots
H01H 7/04 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with fluid timing means with flies, i.e. fan governors
H01H 7/06 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with thermal timing means
H01H 7/08 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with timing by mechanical speed-control devices
H01H 7/10 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with timing by mechanical speed-control devices by escapement
H01H 7/12 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with timing by mechanical speed-control devices by escapement mechanical
H01H 7/14 Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with timing by mechanical speed-control devices by escapement electromagnetic
H01H 7/16 Devices for ensuring operation of the switch at a predetermined point in the ac cycle
H01H 9/00 ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES - Details of switching devices, not covered by groups
H01H 9/02 Bases, casings, or covers
H01H 9/04 Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H 9/06 Casing of switch constituted by a handle serving a purpose other than the actuation of the switch, e.g. by the handle of a vacuum cleaner
H01H 9/08 Arrangements to facilitate replacement of switch, e.g. cartridge housing
H01H 9/10 Adaptation for built-in fuses
H01H 9/12 Means for earthing parts of switch not normally conductively connected to the contacts
H01H 9/14 Adaptation for built-in safety spark gaps
H01H 9/16 Indicators for switching condition, e.g. "on" or "off"
H01H 9/18 Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
H01H 9/20 Interlocking, locking, or latching mechanisms
H01H 9/22 Interlocking, locking, or latching mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
H01H 9/24 Interlocking, locking, or latching mechanisms for interlocking two or more parts of the mechanism for operating contacts
H01H 9/26 Interlocking, locking, or latching mechanisms for interlocking two or more switches
H01H 9/28 Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
H01H 9/30 Means for extinguishing or preventing arc between current-carrying parts
H01H 9/32 Insulating body insertable between contacts
H01H 9/34 Stationary parts for restricting or subdividing the arc, e.g. barrier plate
H01H 9/36 Metal parts
H01H 9/38 Auxiliary contacts on to which the arc is transferred from the main contacts
H01H 9/40 Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
H01H 9/42 Impedances connected with contacts
H01H 9/44 Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
H01H 9/46 Means for extinguishing or preventing arc between current-carrying parts using arcing horns
H01H 9/48 Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
H01H 9/50 Means for detecting the presence of an arc or discharge
H01H 9/52 Cooling of switch parts
H01H 9/54 Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
H01H 9/56 Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the ac cycle
H01H 11/00 Apparatus or processes specially adapted for the manufacture of electric switches
H01H 11/02 Apparatus or processes specially adapted for the manufacture of electric switches for mercury switches
H01H 11/04 Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
H01H 11/06 Fixing of contacts to carrier
H01H 13/00 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
H01H 13/02 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch - Details
H01H 13/04 Cases; Covers
H01H 13/06 Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H 13/08 Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
H01H 13/10 Bases; Stationary contacts mounted thereon
H01H 13/12 Movable parts; Contacts mounted thereon
H01H 13/14 Operating parts, e.g. push-button
H01H 13/16 Operating parts, e.g. push-button adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 13/18 Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling swi
H01H 13/20 Driving mechanisms
H01H 13/22 Driving mechanisms acting with snap action
H01H 13/24 Driving mechanisms with means for introducing a predetermined time delay
H01H 13/26 Snap-action arrangements depending upon deformation of elastic members
H01H 13/28 Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs
H01H 13/30 Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs one end of spring transmitting movement to the contact member when the other end is moved by the operating part
H01H 13/32 Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs one end of spring being fixedly connected to the stationary or movable part of the switch and the other end reacting with a movable or stationary rigid member respectively through pins, cams, toothed, or other shaped surfaces
H01H 13/34 Snap-action arrangements depending upon deformation of elastic members using compression or extension of coil springs having two or more snap-action motions in succession
H01H 13/36 Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
H01H 13/38 Single blade moved across dead-centre position
H01H 13/40 Blade spring with at least one snap-acting leg and at least one separate contactcarrying or contact-actuating leg
H01H 13/42 Blade spring with at least one snap-acting leg and at least one separate contactcarrying or contact-actuating leg having three legs
H01H 13/44 Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs having two or more snap-action motions in succession
H01H 13/46 Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs two separate blade springs forming a toggle
H01H 13/48 Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
H01H 13/50 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
H01H 13/52 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell push switch
H01H 13/54 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state a predetermined time interval after removal of operating force, e.g. for staircase lighting
H01H 13/56 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force
H01H 13/58 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force with contact-driving member rotated step-wise in one direction
H01H 13/60 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon the next application of operating force with contact-driving member moved alternately in opposite directions
H01H 13/62 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state upon manual release of a latch
H01H 13/64 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches
H01H 13/66 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member wherein the switch has more than two electrically distinguishable positions, e.g. multi-position push-button switches the operating member having only two positions
H01H 13/68 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having two operating members, one for opening and one for closing the same set of contacts
H01H 13/70 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
H01H 13/72 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard wherein the switch has means for limiting the number of operating members that can concurrently be in the actuated position
H01H 13/74 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard wherein the switch has means for limiting the number of operating members that can concurrently be in the actuated position each contact set returning to its original state only upon actuation of another of the operating members
H01H 13/76 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard wherein some or all of the operating members actuate different combinations of the contact sets, e.g. ten operating members actuating different combinations of four contact sets
H01H 13/78 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
H01H 13/79 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the form of the contacts, e.g. interspersed fingers or helical networks
H01H 13/80 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the manner of cooperation of the contacts, e.g. with both contacts movable or with bounceless contacts
H01H 13/81 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by electrical connections to external devices
H01H 13/82 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by contact space venting means
H01H 13/83 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by legends, e.g. Braille, liquid crystal displays, light emitting or optical elements
H01H 13/84 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by operational sensory functions, e.g. sound feedback
H01H 13/85 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by operational sensory functions, e.g. sound feedback characterised by tactile feedback features
H01H 13/86 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the casing, e.g. sealed casings or casings reducible in size
H01H 13/88 Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards
H01H 13/702 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
H01H 13/703 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by spacers between contact carrying layers
H01H 13/704 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
H01H 13/705 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys
H01H 13/708 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches in which all fixed and movable contacts are carried by insulating members
H01H 13/712 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches in which all fixed and movable contacts are carried by insulating members all of the insulating members being substantially flat
H01H 13/715 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches in which each contact set includes a contact which is not secured to or part of a supporting layer, e.g. a snap dome
H01H 13/718 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches in which some or all of the movable contacts are formed in a single conductive plate, e.g. formed by punching sheet metal
H01H 13/785 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
H01H 13/803 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the switching function thereof, e.g. normally closed contacts or consecutive operation of contacts
H01H 13/807 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the spatial arrangement of the contact sites, e.g. superimposed sites
H01H 13/7057 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the arrangement of operating parts in relation to each other, e.g. pre-assembled groups of keys
H01H 13/7065 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards
H01H 13/7073 Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by construction, mounting or arrangement of operating parts, e.g. push-buttons or keys characterised by the mechanism between keys and layered keyboards characterised by springs, e.g. Euler springs
H01H 15/00 Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
H01H 15/02 Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch - Details
H01H 15/04 Stationary parts; Contacts mounted thereon
H01H 15/06 Movable parts; Contacts mounted thereon
H01H 15/08 Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H 15/10 Operating parts
H01H 15/12 Operating parts adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 15/14 Operating parts adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling swi
H01H 15/16 Driving mechanisms
H01H 15/18 Driving mechanisms acting with snap action
H01H 15/20 Driving mechanisms with means for introducing a predetermined time delay
H01H 15/22 Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch having a single operating part protruding from different sides of switch casing for alternate actuation from opposite ends
H01H 15/24 Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch having a single operating part only protruding from one side of the switch casing for alternate pushing and pulling
H01H 17/00 Switches having flexible operating part adapted only for pulling, e.g. cord, chain
H01H 17/02 Switches having flexible operating part adapted only for pulling, e.g. cord, chain - Details
H01H 17/04 Stationary parts
H01H 17/06 Movable parts
H01H 17/08 Operating part, e.g. cord
H01H 17/10 Operating part, e.g. cord adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 17/12 Operating part, e.g. cord adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling swi
H01H 17/14 Guiding means for flexible operating part
H01H 17/16 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only
H01H 17/18 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only secured to a part of the switch driving mechanism that has only angular movement
H01H 17/20 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only secured to a part of the switch driving mechanism that has only angular movement the contact returning to its original state immediately upon removal of operating force
H01H 17/22 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only secured to a part of the switch driving mechanism that has only angular movement the contact returning to its original state upon the next application of operating force
H01H 17/24 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single flexible operating part adapted for pulling at one end only secured to a part of the switch driving mechanism that has both angular and rectilinear motion
H01H 17/26 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single operating part adapted for pulling at both ends
H01H 17/28 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single operating part adapted for pulling at both ends secured to a part or parts of the switch driving mechanism having only rectilinear motion
H01H 17/30 Switches having flexible operating part adapted only for pulling, e.g. cord, chain having a single operating part adapted for pulling at both ends secured to a part or parts of the switch driving mechanism having only angular motion
H01H 19/00 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
H01H 19/02 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand - Details
H01H 19/03 Means for limiting the angle of rotation of the operating part
H01H 19/04 Cases; Covers
H01H 19/06 Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H 19/08 Bases; Stationary contacts mounted thereon
H01H 19/10 Movable parts; Contacts mounted thereon
H01H 19/11 Movable parts; Contacts mounted thereon with indexing means
H01H 19/12 Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H 19/14 Operating parts, e.g. turn knob
H01H 19/16 Operating parts, e.g. turn knob adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 19/18 Operating parts, e.g. turn knob adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling swi
H01H 19/20 Driving mechanisms allowing angular displacement of the operating part to be effective in either direction
H01H 19/22 Driving mechanisms allowing angular displacement of the operating part to be effective in either direction incorporating lost motion
H01H 19/24 Driving mechanisms allowing angular displacement of the operating part to be effective in either direction acting with snap action
H01H 19/26 Driving mechanisms allowing angular displacement of the operating part to be effective in either direction with means for introducing a predetermined time delay
H01H 19/28 Driving mechanisms allowing angular displacement of the operating part to be effective or possible in only one direction
H01H 19/30 Driving mechanisms allowing angular displacement of the operating part to be effective or possible in only one direction incorporating lost motion
H01H 19/32 Driving mechanisms allowing angular displacement of the operating part to be effective or possible in only one direction acting with snap action
H01H 19/34 Driving mechanisms allowing angular displacement of the operating part to be effective or possible in only one direction with means for introducing a predetermined time delay
H01H 19/36 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having only two operative positions, e.g. relatively displaced by 180°
H01H 19/38 Change-over switches
H01H 19/40 Change-over switches having only axial contact pressure
H01H 19/42 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having only two operative positions, e.g. relatively displaced by 180° providing more than two electrically-different conditions, e.g. for closing either or both of two circuits
H01H 19/44 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having only two operative positions, e.g. relatively displaced by 180° providing more than two electrically-different conditions, e.g. for closing either or both of two circuits having only axial contact pressure
H01H 19/46 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having three operative positions, e.g. off/star/delta
H01H 19/48 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having three operative positions, e.g. off/star/delta having only axial contact pressure
H01H 19/50 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having four operative positions, e.g. off/two-in-series/one-only/two-in-parallel
H01H 19/52 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having four operative positions, e.g. off/two-in-series/one-only/two-in-parallel having only axial contact pressure
H01H 19/54 Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
H01H 19/56 Angularly-movable actuating part carrying contacts, e.g. drum switch
H01H 19/58 Angularly-movable actuating part carrying contacts, e.g. drum switch having only axial contact pressure, e.g. disc switch, wafer switch
H01H 19/60 Angularly-movable actuating part carrying no contacts
H01H 19/62 Contacts actuated by radial cams
H01H 19/63 Contacts actuated by axial cams
H01H 19/64 Encased switches adapted for ganged operation when assembled in a line with identical switches, e.g. stacked switches
H01H 19/635 Contacts actuated by rectilinearly-movable member linked to operating part, e.g. by pin and slot
H01H 21/00 Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
H01H 21/02 Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand - Details
H01H 21/04 Cases; Covers
H01H 21/06 Cases; Covers interlocked with operating mechanism
H01H 21/08 Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H 21/10 Casing of switch constituted by a handle serving a purpose other than the actuation of the switch
H01H 21/12 Bases; Stationary contacts mounted thereon
H01H 21/14 Means for increasing contact pressure
H01H 21/16 Adaptation for built-in fuse
H01H 21/18 Movable parts; Contacts mounted thereon
H01H 21/20 Contact arrangements for providing make-before-break operation, e.g. for on-load tap-changing
H01H 21/22 Operating parts, e.g. handle
H01H 21/24 Operating parts, e.g. handle biased to return to original position upon removal of operating force
H01H 21/26 Operating parts, e.g. handle biased to return to original position upon removal of operating force adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 21/28 Operating parts, e.g. handle biased to return to original position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling swi
H01H 21/30 Operating parts, e.g. handle not biased to return to original position upon removal of operating force
H01H 21/32 Operating parts, e.g. handle not biased to return to original position upon removal of operating force adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 21/34 Operating parts, e.g. handle not biased to return to original position upon removal of operating force adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling swi
H01H 21/36 Driving mechanisms
H01H 21/38 Driving mechanisms incorporating lost motion
H01H 21/40 Driving mechanisms having snap action
H01H 21/42 Driving mechanisms having snap action produced by compression or extension of coil spring
H01H 21/44 Driving mechanisms having snap action produced by flexing blade springs
H01H 21/46 Driving mechanisms having snap action with two or more snap-action motions in succession
H01H 21/48 Driving mechanisms incorporating a ratchet mechanism
H01H 21/50 Driving mechanisms with means to ensure stopping at intermediate operative positions
H01H 21/52 Driving mechanisms with means for introducing a predetermined time delay
H01H 21/54 Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch, sectionalisers
H01H 21/56 Lever switches with blade-type contact co-operating with one or two spring-clip contacts, e.g. knife switch, sectionalisers making contact in one position only
H01H 21/58 Change-over switches without stable intermediate position
H01H 21/60 Change-over switches with stable intermediate position
H01H 21/86 Switches with abutting contact carried by operating part, e.g. telegraph tapping key
H01H 21/88 Switches with abutting contact carried by operating part, e.g. telegraph tapping key with intermediate position of rest
H01H 23/00 Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
H01H 23/02 Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button - Details
H01H 23/04 Cases; Covers
H01H 23/06 Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H 23/08 Bases; Stationary contacts mounted thereon
H01H 23/10 Adaptation for built-in fuse
H01H 23/12 Movable parts; Contacts mounted thereon
H01H 23/14 Tumblers
H01H 23/16 Driving mechanisms
H01H 23/18 Driving mechanisms incorporating lost motion
H01H 23/20 Driving mechanisms having snap action
H01H 23/22 Driving mechanisms with means for introducing a predetermined time delay
H01H 23/24 Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button with two operating positions
H01H 23/26 Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button with two operating positions one of which positions is unstable
H01H 23/28 Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button with three operating positions
H01H 23/30 Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button with three operating positions with stable centre position and one or both end positions unstable
H01H 25/00 Switches with compound movement of handle or other operating part
H01H 25/04 Operating part movable angularly in more than one plane, e.g. joystick
H01H 25/06 Operating part movable both angularly and rectilinearly, the rectilinear movement being along the axis of angular movement
H01H 27/00 Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
H01H 27/04 Insulating plug or plate inserted between normally-closed contacts
H01H 27/06 Key inserted and then turned to effect operation of the switch
H01H 27/08 Key inserted and then turned to effect operation of the switch wherein the key cannot be removed until the switch is returned to its original position
H01H 27/10 Switch operated by setting members according to a single predetermined combination out of several possible settings
H01H 29/00 Switches having at least one liquid contact
H01H 29/02 Switches having at least one liquid contact - Details
H01H 29/04 Contacts; Containers for liquid contacts
H01H 29/06 Liquid contacts characterised by the material thereof
H01H 29/08 Means for introducing a predetermined time delay
H01H 29/10 Means for introducing a predetermined time delay by constricting the flow of the contact liquid
H01H 29/12 Operating mechanisms adapted for operation by a part of the human body other than the hand, e.g. by foot
H01H 29/14 Operating mechanisms adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch
H01H 29/16 Switches having at least one liquid contact operated by dipping solid contact into stationary contact liquid
H01H 29/18 Switches having at least one liquid contact with level of surface of contact liquid displaced by non-electrical contact-making plunger
H01H 29/20 Switches having at least one liquid contact operated by tilting contact-liquid container
H01H 29/22 Switches having at least one liquid contact operated by tilting contact-liquid container wherein contact is made and broken between liquid and solid
H01H 29/24 Switches having at least one liquid contact operated by tilting contact-liquid container wherein contact is made and broken between liquid and liquid
H01H 29/26 Switches having at least one liquid contact with level of surface of contact liquid displaced by centrifugal action
H01H 29/28 Switches having at least one liquid contact with level of surface of contact liquid displaced by fluid pressure
H01H 29/30 Switches having at least one liquid contact with level of surface of contact liquid displaced by expansion or evaporation thereof
H01H 29/32 Switches having at least one liquid contact with contact made by a liquid jet, e.g. earthing switch with contact made by jet of water
H01H 31/00 Air-break switches for high tension without arc-extinguishing or arc-preventing means
H01H 31/02 Air-break switches for high tension without arc-extinguishing or arc-preventing means - Details
H01H 31/04 Interlocking mechanisms
H01H 31/06 Interlocking mechanisms for interlocking between casing, cover, or protective shutter and mechanism for operating contacts
H01H 31/08 Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
H01H 31/10 Interlocking mechanisms for interlocking two or more switches
H01H 31/12 Adaptation for built-in fuse
H01H 31/14 Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch
H01H 31/16 Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with angularly-movable bridging contact or contact-carrying member
H01H 31/18 Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with angularly-movable bridging contact or contact-carrying member actuated through the movement of one or more insulators
H01H 31/20 Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with angularly-movable bridging contact or contact-carrying member actuated through the movement of one or more insulators at least one insulator being rotatable about its own geometrical axis
H01H 31/22 Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with angularly-movable bridging contact or contact-carrying member wherein the contact or contacts are rectilinearly movable with respect to the carrying member
H01H 31/24 Air-break switches for high tension without arc-extinguishing or arc-preventing means with bridging contact that is not electrically connected to either line contact in open position of switch with rectilinearly-movable bridging contact
H01H 31/26 Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch
H01H 31/28 Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact
H01H 31/30 Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with angularly-movable contact actuated-through the movement of one or more insulators
H01H 31/32 Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact that remains electrically connected to one line in open position of switch with rectilinearly-movable contact
H01H 31/34 Air-break switches for high tension without arc-extinguishing or arc-preventing means with movable contact adapted to engage an overhead transmission line, e.g. for branching
H01H 31/36 Contact moved by pantograph
H01H 33/00 High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
H01H 33/02 High-tension or heavy-current switches with arc-extinguishing or arc-preventing means - Details
H01H 33/04 Means for extinguishing or preventing arc between current-carrying parts
H01H 33/06 Insulating body insertable between contacts
H01H 33/08 Stationary parts for restricting or subdividing the arc, e.g. barrier plate
H01H 33/10 Metal parts
H01H 33/12 Auxiliary contacts on to which the arc is transferred from the main contacts
H01H 33/14 Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
H01H 33/16 Impedances connected with contacts
H01H 33/18 Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
H01H 33/20 Means for extinguishing or preventing arc between current-carrying parts using arcing horns
H01H 33/22 Selection of fluids for arc-extinguishing
H01H 33/24 Means for preventing discharge to non-current-carrying parts, e.g. using corona ring
H01H 33/26 Means for detecting the presence of an arc or other discharge
H01H 33/28 Power arrangements internal to the switch for operating the driving mechanism
H01H 33/30 Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
H01H 33/32 Power arrangements internal to the switch for operating the driving mechanism using fluid actuator pneumatic
H01H 33/34 Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
H01H 33/36 Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
H01H 33/38 Power arrangements internal to the switch for operating the driving mechanism using electromagnet
H01H 33/40 Power arrangements internal to the switch for operating the driving mechanism using spring motor
H01H 33/42 Driving mechanisms
H01H 33/44 Devices for ensuring operation of the switch at a predetermined point in the ac cycle
H01H 33/46 Interlocking mechanisms
H01H 33/48 Interlocking mechanisms for interlocking between casing or cover and mechanism for operating contacts
H01H 33/50 Interlocking mechanisms for interlocking two or more parts of the mechanism for operating contacts
H01H 33/52 Interlocking mechanisms for interlocking two or more switches
H01H 33/53 Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
H01H 33/55 Oil reservoirs or tanks; Lowering means therefor
H01H 33/56 Gas reservoirs
H01H 33/57 Recuperation of liquid or gas
H01H 33/58 Silencers for suppressing noise of switch operation
H01H 33/59 Circuit arrangements not adapted to a particular application of the switch and not otherwise provided for, e.g. for ensuring operation of the switch at a predetermined point in the ac cycle
H01H 33/60 Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
H01H 33/64 Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas
H01H 33/65 Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid wherein the break is in gas wherein the break is in air at atmospheric pressure, e.g. in open air
H01H 33/66 Vacuum switches
H01H 33/68 Liquid-break switches, e.g. oil-break
H01H 33/70 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
H01H 33/72 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber
H01H 33/73 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in air at atmospheric pressure, e.g. in open air
H01H 33/74 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid having stationary parts for directing the flow of arc-extinguishing fluid, e.g. arc-extinguishing chamber wherein the break is in gas
H01H 33/75 Liquid-break switches, e.g. oil-break
H01H 33/76 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor
H01H 33/77 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor wherein the break is in air at atmospheric pressure
H01H 33/78 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid wherein arc-extinguishing gas is evolved from stationary parts; Selection of material therefor wherein the break is in gas
H01H 33/80 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve
H01H 33/82 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas
H01H 33/83 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas wherein the contacts are opened by the flow of air or gas
H01H 33/84 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being liquid, e.g. oil
H01H 33/85 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being liquid, e.g. oil wherein the contacts are opened by the flow of liquid
H01H 33/86 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve
H01H 33/88 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
H01H 33/90 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by, or in conjunction with, the contact-operating mechanism
H01H 33/91 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by, or in conjunction with, the contact-operating mechanism the arc-extinguishing fluid being air or gas
H01H 33/92 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by, or in conjunction with, the contact-operating mechanism the arc-extinguishing fluid being liquid, e.g. oil
H01H 33/94 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected solely due to the pressure caused by the arc itself or by an auxiliary arc
H01H 33/95 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected solely due to the pressure caused by the arc itself or by an auxiliary arc the arc-extinguishing fluid being air or gas
H01H 33/96 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected solely due to the pressure caused by the arc itself or by an auxiliary arc the arc-extinguishing fluid being liquid, e.g. oil
H01H 33/98 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow
H01H 33/99 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow the fluid being liquid
H01H 33/575 Pressure relief devices for normal or emergency use
H01H 33/662 Housings or protective screens
H01H 33/664 Contacts; Arc-extinguishing means, e.g. arcing rings
H01H 33/666 Operating arrangements
H01H 33/668 Means for obtaining or monitoring the vacuum
H01H 33/825 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas with closed circuit of air or gas
H01H 33/835 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid flow of arc-extinguishing fluid from a pressure source being controlled by a valve the fluid being air or gas wherein the contacts are opened by the flow of air or gas with closed circuit of air or gas
H01H 33/867 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve the fluid being air or gas
H01H 33/873 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid under pressure from the contact space being controlled by a valve the fluid being air or gas with closed circuit of air or gas
H01H 33/915 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by, or in conjunction with, the contact-operating mechanism the arc-extinguishing fluid being air or gas with closed circuit of air or gas
H01H 33/985 Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being initiated by an auxiliary arc or a section of the arc, without any moving parts for producing or increasing the flow the fluid being air or gas
H01H 35/00 Switches operated by change of a physical condition
H01H 35/02 Switches operated by change of position, inclination, or orientation of the switch itself in relation to gravitational field
H01H 35/06 Switches operated by change of speed
H01H 35/10 Centrifugal switches
H01H 35/12 Switches operated by change of speed operated by reversal of direction of movement
H01H 35/14 Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch
H01H 35/18 Switches operated by change of liquid level or of liquid density, e.g. float switch
H01H 35/24 Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
H01H 35/26 Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow - Details
H01H 35/28 Compensation for variation of ambient pressure or temperature
H01H 35/30 Means for transmitting pressure to pressure-responsive operating part, e.g. by capsule and capillary tube
H01H 35/32 Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
H01H 35/34 Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by diaphragm
H01H 35/36 Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by curled flexible tube, e.g. Bourdon tube
H01H 35/38 Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by piston and cylinder
H01H 35/40 Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by devices allowing continual flow of fluid, e.g. vane
H01H 35/42 Switches operated by change of humidity
H01H 36/00 Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding
H01H 36/02 Switches actuated by change of magnetic field or of electric field, e.g. by change of relative position of magnet and switch, by shielding actuated by movement of a float carrying a magnet
H01H 37/00 Thermally-actuated switches
H01H 37/02 Thermally-actuated switches - Details
H01H 37/04 Bases; Housings; Mountings
H01H 37/06 Bases; Housings; Mountings to facilitate replacement, e.g. cartridge housing
H01H 37/08 Indicators; Distinguishing marks
H01H 37/10 Compensation for variation of ambient temperature or pressure
H01H 37/12 Means for adjustment of "on" or "off" operating temperature
H01H 37/14 Means for adjustment of "on" or "off" operating temperature by anticipatory electric heater
H01H 37/16 Means for adjustment of "on" or "off" operating temperature by varying the proportion of input heat received by the thermal element, e.g. by displacement of a shield
H01H 37/18 Means for adjustment of "on" or "off" operating temperature by varying bias on the thermal element due to a separate spring
H01H 37/20 Means for adjustment of "on" or "off" operating temperature by varying the position of the thermal element in relation to switch base or casing
H01H 37/22 Means for adjustment of "on" or "off" operating temperature by adjustment of a member transmitting motion from the thermal element to contacts or latch
H01H 37/24 Means for adjustment of "on" or "off" operating temperature by adjustment of position of the movable contact on its driving member
H01H 37/26 Means for adjustment of "on" or "off" operating temperature by adjustment of abutment for "off" position of the movable contact
H01H 37/28 Means for adjustment of "on" or "off" operating temperature by adjustment of the position of the fixed contact
H01H 37/30 Means for adjustment of "on" or "off" operating temperature by varying the position of the contact unit in relation to switch base or casing
H01H 37/32 Thermally-sensitive members
H01H 37/34 Means for transmitting heat thereto, e.g. capsule remote from contact member
H01H 37/36 Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation
H01H 37/38 Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation with bellows
H01H 37/40 Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation with diaphragm
H01H 37/42 Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation with curled flexible tube, e.g. Bourdon tube
H01H 37/44 Thermally-sensitive members actuated due to expansion or contraction of a fluid with or without vaporisation with piston and cylinder
H01H 37/46 Thermally-sensitive members actuated due to expansion or contraction of a solid
H01H 37/48 Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible rigid rods or tubes
H01H 37/50 Thermally-sensitive members actuated due to expansion or contraction of a solid with extensible wires under tension
H01H 37/52 Thermally-sensitive members actuated due to deflection of bimetallic element
H01H 37/54 Thermally-sensitive members actuated due to deflection of bimetallic element wherein the bimetallic element is inherently snap acting
H01H 37/56 Thermally-sensitive members actuated due to deflection of bimetallic element having spirally wound or helically wound bimetallic element
H01H 37/58 Thermally-sensitive members actuated due to thermally controlled change of magnetic permeability
H01H 37/60 Means for producing snap action
H01H 37/62 Means other than thermal means for introducing a predetermined time delay
H01H 37/64 Contacts
H01H 37/66 Magnetic reinforcement of contact pressure; Magnet causing snap action
H01H 37/68 Contacts sealed in evacuated or gas-filled tube
H01H 37/70 Resetting means
H01H 37/72 Switches in which the opening movement and the closing movement of a contact are effected respectively by heating and cooling or vice versa
H01H 37/74 Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
H01H 37/76 Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
H01H 39/00 Switching devices actuated by an explosion produced within the device and initiated by an electric current
H01H 41/00 Switches providing a selected number of consecutive operations of the contacts by a single manual actuation of the operating part
H01H 41/04 Switches without means for setting or mechanically storing a multidigit number
H01H 41/06 Switches without means for setting or mechanically storing a multidigit number dial or slide operated
H01H 41/08 Switches without means for setting or mechanically storing a multidigit number keyboard operated
H01H 41/10 Switches with means for setting or mechanically storing a multidigit number
H01H 41/12 Switches with means for setting or mechanically storing a multidigit number dial or slide operated
H01H 41/14 Switches with means for setting or mechanically storing a multidigit number keyboard operated
H01H 43/00 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed
H01H 43/02 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed - Details
H01H 43/04 Means for time setting
H01H 43/06 Means for time setting comprising separately adjustable parts for each programme step, e.g. with tappets
H01H 43/08 Means for time setting comprising an interchangeable programme part which is common for all programme steps, e.g. with a punched card
H01H 43/10 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed
H01H 43/12 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation
H01H 43/14 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a single cycle of operation wherein repetition of operation necessitates resetting of time intervals
H01H 43/16 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a part rotating at substantially constant speed stopping automatically after a predetermined plurality of cycles of operation
H01H 43/24 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a non-rotatably moving part
H01H 43/26 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a non-rotatably moving part the actuation being produced by a substance flowing due to gravity, e.g. sand, water
H01H 43/28 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to a non-rotatably moving part the actuation being produced by a part, the speed of which is controlled by fluid-pressure means, e.g. by piston and cylinder
H01H 43/30 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to thermal action
H01H 43/32 Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operation after the programme is completed with timing of actuation of contacts due to chemical processes
H01H 45/00 ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES - Details of relays
H01H 45/02 Bases; Casings; Covers
H01H 45/04 Mounting complete relay or separate parts of relay on a base or inside a case
H01H 45/06 Bases; Casings; Covers having windows; Transparent cases or covers
H01H 45/08 Indicators; Distinguishing marks
H01H 45/10 Electromagnetic or electrostatic shielding
H01H 45/12 Ventilating; Cooling; Heating
H01H 45/14 Terminal arrangements
H01H 47/00 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current
H01H 47/02 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay
H01H 47/04 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted or with reduced energising current
H01H 47/06 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted or with reduced energising current by changing number of serially-connected turns or winding
H01H 47/08 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted or with reduced energising current by changing number of parallel-connected turns or windings
H01H 47/10 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for holding armature in attracted position, e.g. when initial energising circuit is interrupted or with reduced energising current by switching-in or -out impedance external to the relay winding
H01H 47/12 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for biasing the electromagnet
H01H 47/14 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for differential operation of the relay
H01H 47/16 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for conjoint, e.g. additive, operation of the relay
H01H 47/18 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for introducing delay in the operation of the relay
H01H 47/20 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for modifying the operation of the relay for producing frequency-selective operation of the relay
H01H 47/22 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil
H01H 47/24 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil having light-sensitive input
H01H 47/26 Circuit arrangements not adapted to a particular application of the relay and designed to obtain desired operating characteristics or to provide energising current for supplying energising current for relay coil having thermo-sensitive input
H01H 47/28 Energising current supplied by discharge tube
H01H 47/30 Energising current supplied by discharge tube by gas-filled discharge tube
H01H 47/32 Energising current supplied by semiconductor device
H01H 47/34 Energising current supplied by magnetic amplifier
H01H 47/36 Relay coil or coils forming part of a bridge circuit
H01H 49/00 Apparatus or processes specially adapted to the manufacture of relays or parts thereof
H01H 50/00 ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES - Details of electromagnetic relays
H01H 50/02 Bases; Casings; Covers
H01H 50/04 Mounting complete relay or separate parts of relay on a base or inside a case
H01H 50/06 Bases; Casings; Covers having windows; Transparent cases or covers
H01H 50/08 Indicators; Distinguishing marks
H01H 50/10 Electromagnetic or electrostatic shielding
H01H 50/12 Ventilating; Cooling; Heating
H01H 50/14 Terminal arrangements
H01H 50/16 Magnetic circuit arrangements
H01H 50/18 Movable parts of magnetic circuits, e.g. armature
H01H 50/20 Movable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil
H01H 50/22 Movable parts of magnetic circuits, e.g. armature movable coaxially with respect to coil wherein the magnetic circuit is substantially closed
H01H 50/24 Parts rotatable or rockable outside coil
H01H 50/26 Parts movable about a knife edge
H01H 50/28 Parts movable due to bending of a blade spring or reed
H01H 50/30 Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
H01H 50/32 Latching movable parts mechanically
H01H 50/34 Means for adjusting limits of movement; Mechanical means for adjusting returning force
H01H 50/36 Stationary parts of magnetic circuit, e.g. yoke
H01H 50/38 Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
H01H 50/40 Branched or multiple-limb main magnetic circuits
H01H 50/42 Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement
H01H 50/44 Magnetic coils or windings
H01H 50/46 Short-circuited conducting sleeves, bands, or discs
H01H 50/54 Contact arrangements
H01H 50/56 Contact spring sets
H01H 50/58 Driving arrangements structurally associated therewith; Mounting of driving arrangement on armature
H01H 50/60 Contact arrangements moving contact being rigidly combined with movable part of magnetic circuit
H01H 50/62 Co-operating movable contacts operated by separate electrical actuating means
H01H 50/64 Driving arrangements between movable part of magnetic circuit and contact
H01H 50/66 Driving arrangements between movable part of magnetic circuit and contact with lost motion
H01H 50/68 Driving arrangements between movable part of magnetic circuit and contact with snap action
H01H 50/70 Driving arrangements between movable part of magnetic circuit and contact operating contact momentarily during stroke of armature
H01H 50/72 Driving arrangements between movable part of magnetic circuit and contact for mercury contact
H01H 50/74 Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter
H01H 50/76 Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter using reed or blade spring
H01H 50/78 Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter using stretched wire or ribbon vibrating sideways
H01H 50/80 Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter using torsionally vibrating member, e.g. wire, strip
H01H 50/82 Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter using spring-loaded pivoted inertia member
H01H 50/84 Mechanical means for producing a desired natural frequency of operation of the contacts, e.g. for self-interrupter with means for adjustment of frequency or of make-to-break ratio
H01H 50/86 Means for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
H01H 50/88 Mechanical means, e.g. dash-pot
H01H 50/90 Mechanical means, e.g. dash-pot the delay being effective in both directions of operation
H01H 50/92 Thermal means
H01H 51/00 Electromagnetic relays
H01H 51/01 Relays in which the armature is maintained in one position by a permanent magnet and freed by energisation of a coil producing an opposing magnetic field
H01H 51/02 Non-polarised relays
H01H 51/04 Non-polarised relays with single set of ganged armatures
H01H 51/06 Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by
H01H 51/08 Contacts alternately opened and closed by successive cycles of energisation and de-energisation of the electromagnet, e.g. by use of a ratchet
H01H 51/10 Contacts retained open or closed by a mechanical latch which is controlled by an electromagnet
H01H 51/12 Armature is movable between two limit positions of rest and is moved in both directions due to the energisation of one or the other of two electromagnets without the storage of energy to effect the return movement
H01H 51/14 Armature is movable between two limit positions of rest and is moved in both directions due to the energisation of one or the other of two electromagnets without the storage of energy to effect the return movement without intermediate neutral position of rest
H01H 51/16 Armature is movable between two limit positions of rest and is moved in both directions due to the energisation of one or the other of two electromagnets without the storage of energy to effect the return movement with intermediate neutral position of rest
H01H 51/18 Armature is rotatable through an unlimited number of revolutions
H01H 51/20 Non-polarised relays with two or more independent armatures
H01H 51/22 Polarised relays
H01H 51/24 Polarised relays without intermediate neutral position of rest
H01H 51/26 Polarised relays with intermediate neutral position of rest
H01H 51/27 Relays with armature having two stable magnetic states and operated by change from one state to the other
H01H 51/28 Relays having both armature and contacts within a sealed casing outside which the operating coil is located, e.g. contact carried by a magnetic leaf spring or reed
H01H 51/29 Relays having armature, contacts, and operating coil within a sealed casing
H01H 51/30 Electromagnetic relays specially adapted for actuation by ac
H01H 51/32 Frequency relays; Mechanically-tuned relays
H01H 51/34 Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
H01H 51/36 Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts wherein the make-to-break ratio is varied by hand setting or current strength
H01H 53/00 Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them
H01H 53/01 Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them - Details
H01H 53/02 Electrodynamic relays, i.e. relays in which the interaction is between two current-carrying conductors
H01H 53/04 Ferrodynamic relays, i.e. relays in which the magnetic field is concentrated in ferromagnetic parts
H01H 53/06 Magnetodynamic relays, i.e. relays in which the magnetic field is produced by a permanent magnet
H01H 53/08 Relays using the dynamo-electric effect, i.e. relays in which contacts are opened or closed due to relative movement of current-carrying conductor and magnetic field caused by force of interaction between them wherein a mercury contact constitutes the current-carrying conductor
H01H 53/10 Induction relays, i.e. relays in which the interaction is between a magnetic field and current induced thereby in a conductor
H01H 53/12 Ferraris relays
H01H 53/14 Contacts actuated by an electric motor through fluid-pressure transmission, e.g. using a motor-driven pump
H01H 53/015 Moving coils; Contact-driving arrangements associated therewith
H01H 55/00 Magnetostrictive relays
H01H 57/00 Electrostrictive relays; Piezoelectric relays
H01H 59/00 Electrostatic relays; Electro-adhesion relays
H01H 61/00 Electrothermal relays
H01H 61/01 Electrothermal relays - Details
H01H 61/02 Electrothermal relays wherein the thermally-sensitive member is heated indirectly, e.g. resistively, inductively
H01H 61/04 Electrothermal relays wherein the thermally-sensitive member is only heated directly
H01H 61/06 Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts
H01H 61/08 Self-interrupters, i.e. with periodic or other repetitive opening and closing of contacts wherein the make-to-break ratio is varied by hand setting or current strength
H01H 61/013 Heating arrangements for operating relays
H01H 61/017 Heating by glow discharge or arc in confined space
H01H 63/00 ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES - Details of electrically-operated selector switches
H01H 63/02 Contacts; Wipers; Connections thereto
H01H 63/04 Contact-making or contact-breaking wipers; Position indicators therefor
H01H 63/06 Contact banks
H01H 63/08 Contact banks cylindrical
H01H 63/10 Contact banks plane
H01H 63/12 Multiplying connections to contact banks, e.g. using ribbon cables
H01H 63/14 Multiplying connections to contact banks, e.g. using ribbon cables without soldering
H01H 63/16 Driving arrangements for multi-position wipers
H01H 63/18 Driving arrangements for multi-position wipers with step-by-step motion of wiper to a selector position
H01H 63/20 Driving arrangements for multi-position wipers with step-by-step motion of wiper to a selector position using stepping magnet and ratchet
H01H 63/22 Driving arrangements for multi-position wipers with step-by-step motion of wiper to a selector position using step-by-step electromagnetic drive without ratchet, e.g. self-interrupting driving magnet
H01H 63/24 Driving arrangements for multi-position wipers with continuous motion of wiper until a selected position is reached
H01H 63/26 Driving arrangements for multi-position wipers with continuous motion of wiper until a selected position is reached with an individual clutch-drive from a shaft common to more than one selector switch
H01H 63/28 Driving arrangements for multi-position wipers with continuous motion of wiper until a selected position is reached with an individual motor for each selector switch
H01H 63/30 Pneumatic motor for moving wiper to selected position
H01H 63/32 Spring motor for moving wiper to selected position
H01H 63/33 Constructional details of co-ordinate-type selector switches not having relays at cross-points
H01H 63/34 Bases; Cases; Covers; Mountings; Mounting of fuses on selector switch
H01H 63/36 Circuit arrangements for ensuring correct or desired operation and not adapted to a particular application of the selector switch
H01H 63/38 Circuit arrangements for ensuring correct or desired operation and not adapted to a particular application of the selector switch for multi-position wiper switches
H01H 63/40 Circuit arrangements for ensuring correct or desired operation and not adapted to a particular application of the selector switch for multi-position switches without wipers
H01H 63/42 Circuit arrangements for ensuring correct or desired operation and not adapted to a particular application of the selector switch for multi-position switches without wipers for co-ordinate-type selector switches not having relays at cross-points
H01H 65/00 Apparatus or processes specially adapted to the manufacture of selector switches or parts thereof
H01H 67/00 Electrically-operated selector switches
H01H 67/02 Multi-position wiper switches
H01H 67/04 Multi-position wiper switches having wipers movable only in one direction for purpose of selection
H01H 67/06 Rotary switches, i.e. having angularly movable wipers
H01H 67/08 Rotary switches, i.e. having angularly movable wipers with wiper selection
H01H 67/10 Rotary switches, i.e. having angularly movable wipers with coarse and fine positioning of wipers
H01H 67/12 Linear-motion switches
H01H 67/14 Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection
H01H 67/16 Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection one motion being rotary and the other being parallel to the axis of rotation, e.g. Strowger or "up and around" switches
H01H 67/18 Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection one motion being rotary and the other being perpendicular to the axis of rotation, e.g. "round and in" switches
H01H 67/20 Multi-position wiper switches having wipers movable in two mutually perpendicular directions for purpose of selection both motions being linear
H01H 67/22 Switches without multi-position wipers
H01H 67/24 Co-ordinate-type relay switches having an individual electromagnet at each cross-point
H01H 67/26 Co-ordinate-type selector switches not having relays at cross-points but involving mechanical movement, e.g. cross-bar switch, code-bar switch
H01H 67/30 Co-ordinate-type selector switches with field of co-ordinate coil acting directly upon magnetic leaf spring or reed-type contact member
H01H 67/32 Switches without multi-position wipers having a multiplicity of interdependent armatures operated in succession by a single coil and each controlling one contact or set of contacts, e.g. counting relay
H01H 69/00 Apparatus or processes for the manufacture of emergency protective devices
H01H 69/01 Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions
H01H 69/02 Manufacture of fuses
H01H 71/00 ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES - Details of the protective switches or relays covered by groups
H01H 71/02 Housings; Casings; Bases; Mountings
H01H 71/04 Means for indicating condition of the switching device
H01H 71/06 Distinguishing marks, e.g. colour coding
H01H 71/08 Terminals; Connections
H01H 71/10 Operating or release mechanisms
H01H 71/12 Automatic release mechanisms with or without manual release
H01H 71/14 Electrothermal mechanisms
H01H 71/16 Electrothermal mechanisms with bimetal element
H01H 71/18 Electrothermal mechanisms with expanding rod, strip, or wire
H01H 71/20 Electrothermal mechanisms with fusible mass
H01H 71/22 Electrothermal mechanisms with compensation for variation of ambient temperature
H01H 71/24 Electromagnetic mechanisms
H01H 71/26 Electromagnetic mechanisms with windings acting in opposition
H01H 71/28 Electromagnetic mechanisms with windings acting in conjunction
H01H 71/30 Electromagnetic mechanisms having additional short-circuited winding
H01H 71/32 Electromagnetic mechanisms having permanently magnetised part
H01H 71/34 Electromagnetic mechanisms having two or more armatures controlled by a common winding
H01H 71/36 Electromagnetic mechanisms frequency selective
H01H 71/38 Electromagnetic mechanisms wherein the magnet coil also acts as arc blow-out device
H01H 71/40 Combined electrothermal and electromagnetic mechanisms
H01H 71/42 Induction-motor, induced-current, or electrodynamic release mechanisms
H01H 71/43 Electrodynamic release mechanisms
H01H 71/44 Automatic release mechanisms with or without manual release having means for introducing a predetermined time delay
H01H 71/46 Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts
H01H 71/48 Automatic release mechanisms with or without manual release having means for operating auxiliary contacts additional to the main contacts with provision for short-circuiting the electrical input to the release mechanism after release of the switch, e.g. for protection of heating wire
H01H 71/50 Manual reset mechanisms
H01H 71/52 Manual reset mechanisms actuated by lever
H01H 71/54 Manual reset mechanisms actuated by tumbler
H01H 71/56 Manual reset mechanisms actuated by rotatable knob or wheel
H01H 71/58 Manual reset mechanisms actuated by push-button, pull-knob, or slide
H01H 71/60 Manual reset mechanisms actuated by closure of switch casing
H01H 71/62 Manual reset mechanisms with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement
H01H 71/64 Manual reset mechanisms with means for preventing resetting while abnormal condition persists, e.g. loose handle arrangement incorporating toggle linkage
H01H 71/66 Power reset mechanisms
H01H 71/68 Power reset mechanisms actuated by electromagnet
H01H 71/70 Power reset mechanisms actuated by electric motor
H01H 71/72 Power reset mechanisms actuated automatically a limited number of times
H01H 71/74 Means for adjusting the conditions under which the device will function to provide protection
H01H 73/00 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
H01H 73/02 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism - Details
H01H 73/04 Contacts
H01H 73/06 Housings; Casings; Bases; Mountings
H01H 73/08 Plug-in housings
H01H 73/10 Cartridge housings, e.g. screw-in housing
H01H 73/12 Means for indicating condition of the switch
H01H 73/14 Indicating lamp structurally associated with the switch
H01H 73/16 Distinguishing marks, e.g. colour coding
H01H 73/18 Means for extinguishing or suppressing arc
H01H 73/20 Terminals; Connections
H01H 73/22 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release
H01H 73/24 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by lever
H01H 73/26 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by tumbler
H01H 73/28 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by rotatable knob or wheel
H01H 73/30 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by push-button, pull-knob, or slide
H01H 73/32 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset by closure of switch casing
H01H 73/34 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electrothermal release and no other automatic release reset action requiring replacement or reconditioning of a fusible or explosive part
H01H 73/36 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release
H01H 73/38 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by lever
H01H 73/40 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by tumbler
H01H 73/42 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by rotatable knob or wheel
H01H 73/44 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by push-button, pull-knob, or slide
H01H 73/46 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having electromagnetic release and no other automatic release reset by closure of switch casing
H01H 73/48 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release
H01H 73/50 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by lever
H01H 73/52 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by tumbler
H01H 73/54 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by rotatable knob or wheel
H01H 73/56 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by push-button, pull-knob, or slide
H01H 73/58 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism having both electrothermal and electromagnetic automatic release reset by closure of switch casing
H01H 73/60 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism cartridge type, e.g. screw-in cartridge
H01H 73/62 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism cartridge type, e.g. screw-in cartridge having only electrothermal release
H01H 73/64 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism cartridge type, e.g. screw-in cartridge having only electromagnetic release
H01H 73/66 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism cartridge type, e.g. screw-in cartridge having combined electrothermal and electromagnetic release
H01H 75/00 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism
H01H 75/02 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism - Details
H01H 75/04 Reset mechanisms for automatically reclosing a limited number of times
H01H 75/06 Reset mechanisms for automatically reclosing a limited number of times effecting one reclosing action only
H01H 75/08 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism having only electrothermal release
H01H 75/10 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism having only electromagnetic release
H01H 75/12 Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of power reset mechanism having combined electrothermal and electromagnetic release
H01H 77/00 Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting
H01H 77/02 Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism
H01H 77/04 Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrothermal opening
H01H 77/06 Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electromagnetic opening
H01H 77/08 Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electromagnetic opening retained closed by permanent or remanent magnetism and opened by windings acting in opposition
H01H 77/10 Protective overload circuit-breaking switches operated by excess current and requiring separate action for resetting in which the excess current itself provides the energy for opening the contacts, and having a separate reset mechanism with electrodynamic opening
H01H 79/00 Protective switches in which excess current causes the closing of contacts, e.g. for short-circuiting the apparatus to be protected
H01H 81/00 Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting
H01H 81/02 Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting electrothermally-operated
H01H 81/04 Protective switches in which contacts are normally closed but are repeatedly opened and reclosed as long as a condition causing excess current persists, e.g. for current limiting electromagnetically-operated
H01H 83/00 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
H01H 83/02 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents
H01H 83/04 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by earth fault currents with testing means for indicating the ability of the switch or relay to function properly
H01H 83/06 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by current falling below a predetermined value
H01H 83/08 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by reversal of dc
H01H 83/10 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection
H01H 83/12 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by voltage falling below a predetermined value, e.g. for no-volt protection
H01H 83/14 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by unbalance of two or more currents or voltages, e.g. for differential protection
H01H 83/16 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by abnormal ratio of voltage and current, e.g. distance relay
H01H 83/18 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by abnormal product of, or abnormal phase angle between, voltage and current, e.g. directional relay
H01H 83/20 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition
H01H 83/22 Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess current as well as by some other abnormal electrical condition the other condition being unbalance of two or more currents or voltages
H01H 85/00 Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
H01H 85/02 Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive - Details
H01H 85/04 Fuses, i.e. expendable parts of the protective device, e.g. cartridges
H01H 85/05 Component parts thereof
H01H 85/06 Fusible members characterised by the fusible material
H01H 85/08 Fusible members characterised by the shape or form of the fusible member
H01H 85/10 Fusible members characterised by the shape or form of the fusible member with constriction for localised fusing
H01H 85/11 Fusible members characterised by the shape or form of the fusible member with applied local area of a metal which, on melting, forms a eutectic with the main material of the fusible member, i.e. M-effect devices
H01H 85/12 Two or more separate fusible members in parallel
H01H 85/15 Screw-in contacts
H01H 85/17 Casings characterised by the casing material
H01H 85/18 Casing fillings, e.g. powder
H01H 85/20 Bases for supporting the fuse; Separate parts thereof
H01H 85/22 Intermediate or auxiliary parts for carrying, holding, or retaining fuse, co-operating with base or fixed holder, and removable therefrom for renewing the fuse
H01H 85/24 Means for preventing insertion of incorrect fuse
H01H 85/25 Safety arrangements preventing or inhibiting contact with live parts, including operation of isolation on removal of cover
H01H 85/26 Magazine arrangements
H01H 85/28 Magazine arrangements effecting automatic replacement
H01H 85/30 Means for indicating condition of fuse structurally associated with the fuse
H01H 85/32 Indicating lamp structurally associated with the protective device
H01H 85/34 Distinguishing marks, e.g. colour coding
H01H 85/36 Means for applying mechanical tension to fusible member
H01H 85/38 Means for extinguishing or suppressing arc
H01H 85/40 Means for extinguishing or suppressing arc using an arc-extinguishing liquid
H01H 85/041 Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
H01H 85/042 General constructions or structure of high voltage fuses, i.e. above 1,000 V
H01H 85/43 Means for exhausting or absorbing gases liberated by fusing arc, or for ventilating excess pressure generated by heating
H01H 85/044 General constructions or structure of low voltage fuses, i.e. below 1,000 V, or of fuses where the applicable voltage is not specified
H01H 85/045 General constructions or structure of low voltage fuses, i.e. below 1,000 V, or of fuses where the applicable voltage is not specified cartridge type
H01H 85/046 Fuses formed as printed circuits
H01H 85/047 Vacuum fuses
H01H 85/048 Fuse resistors
H01H 85/50 Protective devices wherein the fuse is carried or held directly by the base the fuse having contacts at opposite ends for co-operation with the base
H01H 85/52 Protective devices wherein the fuse is carried or held directly by the base the fuse being adapted for screwing into the base
H01H 85/54 Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers
H01H 85/055 Fusible members
H01H 85/56 Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers the intermediate or auxiliary part having side contacts for plugging into the base, e.g. bridge-carrier type
H01H 85/58 Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers the intermediate or auxiliary part having side contacts for plugging into the base, e.g. bridge-carrier type with intermediate auxiliary part and base shaped to interfit and thereby enclose the fuse
H01H 85/60 Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers the intermediate or auxiliary part having contacts at opposite ends for co-operation with the base
H01H 85/62 Protective devices wherein the fuse is carried, held, or retained by an intermediate or auxiliary part removable from the base, or used as sectionalisers the intermediate or auxiliary part being adapted for screwing into the base
H01H 85/143 Electrical contacts; Fastening fusible members to such contacts
H01H 85/147 Parallel-side contacts
H01H 85/153 Knife-blade-end contacts
H01H 85/157 Ferrule-end contacts
H01H 85/165 Casings
H01H 85/175 Casings characterised by the casing shape or form
H01H 85/0445 General constructions or structure of low voltage fuses, i.e. below 1,000 V, or of fuses where the applicable voltage is not specified fast or slow type
H01H 87/00 Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on c
H01H 89/00 Combinations of two or more different basic types of electric switches, relays, selectors and emergency protective devices, not covered by any single one of the other main groups of this subclass
H01H 89/02 Combination of a key operated switch with a manually operated switch, e.g. ignition and lighting switches
H01H 89/04 Combination of a thermally actuated switch with a manually operated switch
H01H 89/06 Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device
H01H 89/08 Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair
H01H 89/10 Combination of a manual reset circuit with a contactor, i.e. the same circuit controlled by both a protective and a remote control device with both devices using the same contact pair with each device controlling one of the two co-operating contacts