IPC Classification

Class code (prefix) Descriptions Number of results
  • All sections
  • G - Physics
  • G04B - Mechanically-driven clocks or watches; mechanical parts of clocks or watches in general; time-pieces using the position of the sun, moon, or stars
G04B 1/00 Driving mechanisms
G04B 1/02 Driving mechanisms with driving weight
G04B 1/04 Mechanisms in which the clockwork acts as the driving weight
G04B 1/06 Driving mechanisms with driving weight with several weights
G04B 1/08 Driving weights; Chains; Chain wheels; Arbors for chain wheels
G04B 1/10 Driving mechanisms with mainspring
G04B 1/12 Driving mechanisms with mainspring with several mainsprings
G04B 1/14 Mainsprings; Bridles therefor
G04B 1/16 Barrels; Arbors; Barrel axles
G04B 1/18 Constructions for connecting the ends of mainsprings with the barrel or the arbor
G04B 1/20 Protecting arrangements against rupture or overwinding of the mainspring located in the barrel or attached to the barrel
G04B 1/22 Compensation of changes in the motive power of the mainspring
G04B 1/24 Driving mechanisms with both mainsprings and driving weights
G04B 1/26 Driving mechanisms driven by liquids or gases; Liquid or gaseous drives for mechanically-controlled secondary clocks
G04B 3/00 Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously
G04B 3/02 Removably-mounted keys or the like
G04B 3/04 Rigidly-mounted keys, knobs, or crowns
G04B 3/06 Keys or the like with means preventing overwinding
G04B 3/08 Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously by parts of the cases
G04B 3/10 Protecting means preventing overwinding
G04B 3/12 Normal winding of clockworks by hand or mechanically; Winding-up several mainsprings or driving weights simultaneously by mechanical means, e.g. pneumatic motor
G04B 5/00 Automatic winding-up
G04B 5/02 Automatic winding-up by self-winding caused by movement of the watch
G04B 5/04 Automatic winding-up by self-winding caused by movement of the watch by oscillating weights the movement of which is limited
G04B 5/06 Automatic winding-up by self-winding caused by movement of the watch by oscillating weights the movement of which is limited acting in one direction only
G04B 5/08 Automatic winding-up by self-winding caused by movement of the watch by oscillating weights the movement of which is limited acting in both directions
G04B 5/10 Automatic winding-up by self-winding caused by movement of the watch by oscillating weights the movement of which is not limited
G04B 5/12 Automatic winding-up by self-winding caused by movement of the watch by oscillating weights the movement of which is not limited acting in one direction only
G04B 5/14 Automatic winding-up by self-winding caused by movement of the watch by oscillating weights the movement of which is not limited acting in both directions
G04B 5/16 Construction of the weights
G04B 5/18 Supports, suspensions, or guide arrangements, for oscillating weights
G04B 5/19 Suspension of the oscillating weight at its centre of rotation
G04B 5/20 Automatic winding-up by movements of other objects, e.g. by opening hand-bag, by opening case, by opening door; Winding-up by wind power
G04B 5/22 Automatic winding-up by thermometric, barometric, or like effects or alterations
G04B 5/24 Protecting means preventing overwinding
G04B 7/00 Combined normal and automatic winding-up
G04B 9/00 Supervision of the state of winding, e.g. indicating the amount of winding
G04B 9/02 Devices controlled by such state, e.g. device affording protection against overwinding
G04B 11/00 Click devices, stop clicks or clutches for winding
G04B 11/02 Devices allowing the motion of a rotatable part in only one direction
G04B 11/04 Pawl constructions therefor, e.g. pawl secured to an oscillating member actuating a ratchet
G04B 13/00 Gearwork
G04B 13/02 Wheels; Pinions; Spindles; Pivots
G04B 15/00 Escapements
G04B 15/02 Escapements permanently in contact with the regulating mechanism
G04B 15/04 Cylinder escapements
G04B 15/06 Free escapements
G04B 15/08 Lever escapements
G04B 15/10 Escapements with constant impulses for the regulating mechanism
G04B 15/12 Adjusting; Restricting the amplitude of the lever or the like
G04B 15/14 Component parts or constructional details, e.g. construction of the lever or the escape wheel
G04B 17/00 Mechanisms for stabilising frequency
G04B 17/02 Oscillators acting by gravity, e.g. pendulum swinging in a plane
G04B 17/04 Oscillators acting by spring tension
G04B 17/06 Oscillators with hairsprings, e.g. balance
G04B 17/08 Oscillators with coil springs stretched and unstretched axially
G04B 17/10 Oscillators with torsion strips or with springs acting in the same manner as torsion strips, e.g. weight oscillating in a horizontal plane
G04B 17/20 Compensation of mechanisms for stabilizing frequency
G04B 17/22 Compensation of mechanisms for stabilizing frequency for the effect of variations of temperature
G04B 17/24 Compensation of mechanisms for stabilizing frequency for the effect of variations of atmospheric pressure
G04B 17/26 Compensation of mechanisms for stabilizing frequency for the effect of variations of the impulses
G04B 17/28 Compensation of mechanisms for stabilizing frequency for the effect of unbalance of the weights, e.g. tourbillon
G04B 17/30 Rotating governors, e.g. centrifugal governors, fan governors
G04B 17/32 Component parts or constructional details, e.g. collet, stud
G04B 17/34 Component parts or constructional details, e.g. collet, stud for fastening the hairspring onto the balance
G04B 18/00 Mechanisms for setting frequency
G04B 18/02 Regulator devices; Indexing devices
G04B 18/04 Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat
G04B 18/06 Adjusting the beat of the pendulum, balance, or the like, e.g. putting into beat by setting the collet or the stud of a hairspring
G04B 18/08 Component parts or constructional details
G04B 19/00 Indicating the time by visual means
G04B 19/02 Back-gearing arrangements between gear train and hands
G04B 19/04 Hands; Discs with a single mark or the like
G04B 19/06 Dials
G04B 19/08 Geometrical arrangement of the graduations
G04B 19/10 Ornamental shape of the graduations or the surface of the dial; Attachment of graduations to the dial
G04B 19/12 Selection of materials for dials or graduations
G04B 19/14 Fastening the dials to the clock or the watch plates
G04B 19/16 Shiftable dials, e.g. indicating alternately from 1 to 12 and from 13 to 24
G04B 19/18 Graduations on the crystal or glass, on the bezel, or on the rim
G04B 19/20 Indicating by numbered bands, drums, discs, or sheets
G04B 19/21 Drums
G04B 19/22 Arrangements for indicating different local apparent times; Universal time-pieces
G04B 19/23 Arrangements for indicating different local apparent times; Universal time-pieces by means of additional hands or additional pairs of hands
G04B 19/24 Clocks or watches with date indicators; Clockwork calendars
G04B 19/25 Devices for setting the date indicators manually
G04B 19/26 Clocks or watches with indicators for tides, for the phases of the moon, or the like
G04B 19/28 Adjustable guide marks or pointers for indicating determined points of time
G04B 19/30 Illumination of dials or hands
G04B 19/32 Illumination of dials or hands by luminescent substances
G04B 19/34 Position of the hands projected optically
G04B 19/243 Clocks or watches with date indicators; Clockwork calendars characterised by the shape of the date indicator
G04B 19/247 Clocks or watches with date indicators; Clockwork calendars characterised by the shape of the date indicator disc-shaped
G04B 19/253 Driving or releasing mechanisms
G04B 19/257 Clocks or watches with date indicators; Clockwork calendars characterised by the shape of the date indicator drum-shaped
G04B 21/00 Indicating the time by acoustic means
G04B 21/02 Regular striking mechanisms giving the full hour, half hour, or quarter hour
G04B 21/04 Hour wheels; Racks or rakes; Snails or similar control mechanisms
G04B 21/06 Regular striking mechanisms giving the full hour, half hour, or quarter hour - Details of striking mechanisms, e.g. hammer or fan governor
G04B 21/08 Sounding bodies; Whistles; Musical apparatus
G04B 21/10 Releasing or locking the regular stroke, e.g. for silence during the night
G04B 21/12 Reiterating watches or clocks
G04B 21/14 Winding-up the striking mechanism by the clockwork; Winding-up the clockwork by the striking mechanism
G04B 23/00 Arrangements producing acoustic signals at preselected times
G04B 23/02 Alarm clocks
G04B 23/03 Alarm signal stop arrangements
G04B 23/04 Alarm clocks with coarse and fine setting of the preselected time
G04B 23/06 Alarm clocks adjustable for several preselected times with automatic stopping of the signal
G04B 23/08 Alarm clocks operating only once in each 24 hours
G04B 23/10 Alarm clocks with changeable intensity of sound
G04B 23/12 Alarm watches to be worn in pockets or on the wrist
G04B 25/00 Indicating the time by other means or by combined means
G04B 25/02 Indicating the time by other means or by combined means by feeling; Clocks or watches for blind persons
G04B 25/04 Alarm clocks or watches with devices stimulating the skin
G04B 25/06 Indicating the time by other means or by combined means by moving figures, e.g. cuckoo-clock, trumpet clock
G04B 27/00 Mechanical devices for setting the time-indicating means
G04B 27/02 Mechanical devices for setting the time-indicating means by making use of the winding means
G04B 27/04 Mechanical devices for setting the time-indicating means by making use of the winding means with clutch wheel
G04B 27/06 Mechanical devices for setting the time-indicating means by making use of the winding means with rocking bar
G04B 27/08 Mechanical devices for setting the time-indicating means by using parts of the case
G04B 29/00 Frameworks
G04B 29/02 Plates; Bridges; Cocks
G04B 29/04 Connecting or supporting parts
G04B 31/00 Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor
G04B 31/02 Shock-damping bearings
G04B 31/04 Shock-damping bearings with jewel hole and cap jewel
G04B 31/06 Manufacture or mounting processes
G04B 31/08 Lubrication
G04B 31/012 Metallic bearings
G04B 31/016 Plastic bearings
G04B 33/00 Calibers
G04B 33/02 Circular calibers
G04B 33/04 Non-circular calibers
G04B 33/06 Calibers of extremely flat shape
G04B 33/08 Calibers in which the gear train is arranged in different planes, e.g. parallel or inclined to each other
G04B 33/10 Calibers with seconds hand arranged in the centre of the dial
G04B 33/12 Calibers for extremely-long running times
G04B 33/14 Calibers of which the mainsprings or barrels are easily removable
G04B 33/16 Calibers with arrangements affording protection of the clockwork against damage as a consequence of a rupture of the mainspring
G04B 35/00 Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
G04B 37/00 Cases
G04B 37/02 Evacuated cases; Cases filled with gases or liquids; Cases containing substances for absorbing or binding moisture or dust
G04B 37/04 Mounting the clockwork in the case; Shock-absorbing mountings
G04B 37/05 Fixed mountings for pocket or wrist watches
G04B 37/06 Forming the passage for the winding stem through the case; Divided winding stems
G04B 37/08 Hermetic sealing of openings, joints, passages, or slits
G04B 37/10 Hermetic sealing of openings, joints, passages, or slits of winding stems
G04B 37/11 Hermetic sealing of openings, joints, passages, or slits of the back cover of pocket or wrist watches
G04B 37/12 Cases for special purposes, e.g. watch combined with ring, watch combined with button
G04B 37/14 Suspending devices, supports, or stands for time-pieces in so far as they form part of the case
G04B 37/16 Fastening the case to the bracelet
G04B 37/18 Cases for pocket or wrist watches
G04B 37/20 Cases for pocket or wrist watches with hinged covers or backs
G04B 37/22 Materials or processes of manufacturing pocket watch or wrist watch cases
G04B 39/00 Watch crystals; Fastening or sealing crystals; Clock glasses
G04B 39/02 Sealing crystals or glasses
G04B 41/00 Locking or holding devices for pendulums, chimes, or the like, for use during transport
G04B 43/00 Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
G04B 45/00 Time-pieces of which the indicating means or cases provoke special effects, e.g. aesthetic effect
G04B 45/02 Time-pieces of which the clockwork is visible partly or wholly
G04B 45/04 Time-pieces with invisible drive, e.g. with hands attached to rotating glass disc
G04B 47/00 Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece
G04B 47/02 Installations within mirrors, pictures, furniture, or other household articles
G04B 47/04 Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece with attached ornaments or amusement apparatus
G04B 47/06 Time-pieces combined with other articles which do not interfere with the running or the time-keeping of the time-piece with attached measuring instruments, e.g. pedometer, barometer, thermometer, compass
G04B 49/00 Time-pieces using the position of the sun, moon, or stars
G04B 49/02 Sundials
G04B 49/04 Graduation or shaping of dials
G04B 99/00 Subject matter not provided for in other groups of this subclass