IPC Subgroup
G04B 21/02 Regular striking mechanisms giving the full hour, half hour, or quarter hour
Introduced: September 1968
Last revised: January 2006
Full Title
Indicating the time by acoustic means > Regular striking mechanisms giving the full hour, half hour, or quarter hour
Classification Context
- Section:
- PHYSICS
- Class:
- HOROLOGY
- Subclass:
- MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME-PIECES USING THE POSITION OF THE SUN, MOON, OR STARS
Related Keywords
mechanical STRIKING -mechanisms in clocks
6 direct subcodes
Child Classifications
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- G04B 21/04 Hour wheels; Racks or rakes; Snails or similar control mechanisms
- G04B 21/06 Details of striking mechanisms, e.g. hammer or fan governor
- G04B 21/08 Sounding bodies; Whistles; Musical apparatus
- G04B 21/1 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