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 (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08)
Introduced: September 1968
Description
G04B covers mechanical timepieces and their functional components, encompassing traditional clock and watch mechanisms driven by mechanical energy sources such as springs or weights. This includes escapement systems, gear trains, pendulums, balance wheels, and other mechanical regulating elements essential to timekeeping accuracy. The classification also extends to astronomical timepieces that determine time based on celestial positioning of the sun, moon, or stars. Related mechanical time measurement devices fall within this scope, while electronic or quartz-based timekeeping systems are excluded.
Title
Titles differ between systems:
IPC: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
CPC: MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08)
Full Title
Full titles differ between systems:
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS (spring- or weight-driven mechanisms in general F03G; electromechanical clocks or watches G04C; electromechanical clocks with attached or built-in means operating any device at pre-selected times or after predetermined time intervals G04C23/00; clocks or watches with stop devices G04F7/08)
IPC and CPC are identically structured here. All 27 subcodes exist in both systems.
14 shared codes have differing titles between IPC and CPC.
Child Classifications
Navigate with arrow keys, Enter to open
- G04B 15/00 Escapements ( electric or magnetic means for converting oscillatory to rotary motion in electromechanical time-pieces ) IPC+CPC Available in IPC and CPC
- G04B 19/00 Indicating the time by visual means ( by electric lamps G04C17/02; display arrangements in general G09F) IPC+CPC Available in IPC and CPC
- G04B 21/00 Indicating the time by acoustic means (at preselected times G04B23/00; by electro-acoustic means G04C21/04; ) +1 CPC IPC+CPC Available in IPC and CPC
- G04B 23/00 Arrangements producing acoustic signals at preselected times +1 CPC IPC+CPC Available in IPC and CPC
- G04B 25/00 Indicating the time by other means or by combined means (electric or electromechanical indicating G04C ) +1 CPC IPC+CPC Available in IPC and CPC
- G04B 27/00 Mechanical devices for setting the time indicating means +6 CPC IPC+CPC Available in IPC and CPC
- G04B 3/00 Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously +5 CPC IPC+CPC Available in IPC and CPC
- G04B 31/00 Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor (bearings in general F16C ) IPC+CPC Available in IPC and CPC
- G04B 35/00 Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears IPC+CPC Available in IPC and CPC
- G04B 39/00 Watch crystals; Fastening or sealing of crystals; Clock glasses +3 CPC IPC+CPC Available in IPC and CPC
- G04B 41/00 Locking or holding devices for pendulums, chimes, or the like, for use during transport +1 CPC IPC+CPC Available in IPC and CPC
- G04B 43/00 Protecting clockworks by shields or other means against external influences, e.g. magnetic fields +3 CPC IPC+CPC Available in IPC and CPC