IPC Classification

Class code (prefix) Descriptions Number of results
G08B 1/00 Systems for signalling characterised solely by the form of transmission of the signal
G08B 1/02 Systems for signalling characterised solely by the form of transmission of the signal using only mechanical transmission
G08B 1/04 Systems for signalling characterised solely by the form of transmission of the signal using pneumatic transmission
G08B 1/06 Systems for signalling characterised solely by the form of transmission of the signal using pneumatic transmission hydraulic only
G08B 1/08 Systems for signalling characterised solely by the form of transmission of the signal using electric transmission
G08B 3/00 Audible signalling systems; Audible personal calling systems
G08B 3/02 Audible signalling systems; Audible personal calling systems using only mechanical transmission
G08B 3/06 Audible signalling systems; Audible personal calling systems using pneumatic transmission
G08B 3/10 Audible signalling systems; Audible personal calling systems using electromagnetic transmission
G08B 3/14 Audible signalling systems; Audible personal calling systems using explosives
G08B 5/00 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
G08B 5/02 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using only mechanical transmission
G08B 5/06 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using pneumatic transmission
G08B 5/14 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using pneumatic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
G08B 5/16 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using pneumatic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with reset means necessitating a separate operation to return the indicator element
G08B 5/18 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using pneumatic transmission with indicator element moving rectilinearly
G08B 5/20 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using pneumatic transmission with indicator element moving rectilinearly with reset means necessitating a separate operation to return the indicator element
G08B 5/22 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission
G08B 5/24 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
G08B 5/26 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with reset means necessitating a separate operation to return the indicator element
G08B 5/28 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with hinged flap or arm
G08B 5/30 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with rotating or oscillating members, e.g. vanes
G08B 5/32 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission with indicator element moving rectilinearly
G08B 5/34 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission with indicator element moving rectilinearly with reset means necessitating a separate operation to return the indicator element
G08B 5/36 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission using visible light sources
G08B 5/38 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electromagnetic transmission using visible light sources using flashing light
G08B 5/40 Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using smoke, fire or coloured gases
G08B 6/00 Tactile signalling systems, e.g. personal calling systems
G08B 7/00 Signalling systems according to more than one of groups ; Personal calling systems according to more than one of groups
G08B 7/02 Signalling systems according to more than one of groups ; Personal calling systems according to more than one of groups using mechanical transmission
G08B 7/04 Signalling systems according to more than one of groups ; Personal calling systems according to more than one of groups using pneumatic transmission
G08B 7/06 Signalling systems according to more than one of groups ; Personal calling systems according to more than one of groups using electric transmission
G08B 7/08 Signalling systems according to more than one of groups ; Personal calling systems according to more than one of groups using explosives
G08B 9/00 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships
G08B 9/02 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships - Details
G08B 9/04 Means for recording operation of the apparatus
G08B 9/06 Means for indicating disagreement between orders given and those carried out
G08B 9/08 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships mechanical
G08B 9/10 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships mechanical using ratchet
G08B 9/12 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships mechanical using rotary shaft
G08B 9/14 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships pneumatic
G08B 9/16 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships pneumatic using ratchet
G08B 9/18 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships pneumatic by varying displacement of the fluid
G08B 9/20 Order telegraph apparatus, i.e. means for transmitting one of a finite number of different orders at the discretion of the user, e.g. bridge to engine room orders in ships pneumatic by varying pressure of the fluid
G08B 13/00 Burglar, theft or intruder alarms
G08B 13/02 Mechanical actuation
G08B 13/04 Mechanical actuation by breaking of glass
G08B 13/06 Mechanical actuation by tampering with fastening
G08B 13/08 Mechanical actuation by opening, e.g. of door, of window, of drawer, of shutter, of curtain, of blind
G08B 13/10 Mechanical actuation by pressure on floors, floor coverings, stair treads, counters, or tills
G08B 13/12 Mechanical actuation by the breaking or disturbance of stretched cords or wires
G08B 13/14 Mechanical actuation by lifting or attempted removal of hand-portable articles
G08B 13/16 Actuation by interference with mechanical vibrations in air or other fluid
G08B 13/18 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
G08B 13/19 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infra-red-radiation detection systems
G08B 13/20 Actuation by change of fluid pressure
G08B 13/22 Electrical actuation
G08B 13/24 Electrical actuation by interference with electromagnetic field distribution
G08B 13/26 Electrical actuation by proximity of an intruder causing variation in capacitance or inductance of a circuit
G08B 13/181 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
G08B 13/183 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier
G08B 13/184 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using radiation reflectors
G08B 13/186 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interruption of a radiation beam or barrier using light guides, e.g. optical fibres
G08B 13/187 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems by interference of a radiation field
G08B 13/189 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems
G08B 13/191 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infra-red-radiation detection systems using pyroelectric sensor means
G08B 13/193 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using infra-red-radiation detection systems using focusing means
G08B 13/194 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems
G08B 13/196 Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using passive radiation detection systems using image scanning and comparing systems using television cameras
G08B 15/00 Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives
G08B 15/02 Identifying, scaring or incapacitating burglars, thieves or intruders, e.g. by explosives with smoke, gas, or coloured or odorous powder or liquid
G08B 17/00 Fire alarms; Alarms responsive to explosion
G08B 17/02 Mechanical actuation of the alarm, e.g. by the breaking of a wire
G08B 17/04 Hydraulic or pneumatic actuation of the alarm, e.g. by change of fluid pressure
G08B 17/06 Electric actuation of the alarm, e.g. using a thermally-operated switch
G08B 17/08 Actuation involving the use of explosive means
G08B 17/10 Actuation by presence of smoke or gases
G08B 17/11 Actuation by presence of smoke or gases using an ionisation chamber for detecting smoke or gas
G08B 17/12 Actuation by presence of radiation or particles, e.g. of infra-red radiation or of ions
G08B 17/103 Actuation by presence of smoke or gases using a light emitting and receiving device
G08B 17/107 Actuation by presence of smoke or gases using a light emitting and receiving device for detecting light-scattering due to smoke
G08B 17/113 Constructional details
G08B 17/117 Actuation by presence of smoke or gases by using a detection device for specific gases, e.g. combustion products, produced by the fire
G08B 19/00 Alarms responsive to two or more different undesired or abnormal conditions, e.g. burglary and fire, abnormal temperature and abnormal rate of flow
G08B 19/02 Alarm responsive to formation or anticipated formation of ice
G08B 21/00 Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
G08B 21/02 Alarms for ensuring the safety of persons
G08B 21/04 Alarms for ensuring the safety of persons responsive to non-activity, e.g. of elderly persons
G08B 21/06 Alarms for ensuring the safety of persons indicating a condition of sleep, e.g. anti-dozing alarms
G08B 21/08 Alarms for ensuring the safety of persons responsive to an abnormal condition of a body of water
G08B 21/10 Alarms for ensuring the safety of persons responsive to calamitous events, e.g. tornados or earthquakes
G08B 21/12 Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
G08B 21/14 Toxic gas alarms
G08B 21/16 Combustible gas alarms
G08B 21/18 Status alarms
G08B 21/20 Status alarms responsive to moisture
G08B 21/22 Status alarms responsive to presence or absence of persons
G08B 21/24 Reminder alarms, e.g. anti-loss alarms
G08B 23/00 Alarms responsive to unspecified undesired or abnormal conditions
G08B 25/00 Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
G08B 25/01 Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
G08B 25/04 Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using a single signalling line, e.g. in a closed loop
G08B 25/06 Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using power transmission lines
G08B 25/08 Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
G08B 25/10 Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
G08B 25/12 Manually actuated calamity alarm transmitting arrangements
G08B 25/14 Central alarm receiver or annunciator arrangements
G08B 26/00 Alarm systems in which substations are interrogated in succession by a central station
G08B 27/00 Alarm systems in which the alarm condition is signalled from a central station to a plurality of substations
G08B 29/00 Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
G08B 29/02 Monitoring continuously signalling or alarm systems
G08B 29/04 Monitoring of the detection circuits
G08B 29/06 Monitoring of the line circuits, e.g. signalling of line faults
G08B 29/08 Signalling of tampering with the line circuit
G08B 29/10 Monitoring of the annunciator circuits
G08B 29/12 Checking intermittently signalling or alarm systems
G08B 29/14 Checking intermittently signalling or alarm systems checking the detection circuits
G08B 29/16 Security signalling or alarm systems, e.g. redundant systems
G08B 29/18 Prevention or correction of operating errors
G08B 29/20 Calibration, including self-calibrating arrangements
G08B 29/22 Provisions facilitating manual calibration, e.g. input or output provisions for testing; Holding of intermittent values to permit measurement
G08B 29/24 Self-calibration, e.g. compensating for environmental drift or ageing of components
G08B 29/26 Self-calibration, e.g. compensating for environmental drift or ageing of components by updating and storing reference thresholds
G08B 29/28 Self-calibration, e.g. compensating for environmental drift or ageing of components by changing the gain of an amplifier
G08B 31/00 Predictive alarm systems characterised by extrapolation or other computation using updated historic data