CPC Subgroup
G04B 21/02 Regular striking mechanisms giving the full hour, half hour or quarter hour
Full Title
Indicating the time by acoustic means (at preselected times G04B23/00; by electro-acoustic means G04C21/04; ) > Regular striking mechanisms giving the full hour, half hour or quarter hour
8 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, fan governor
- G04B 21/08 Sounding bodies; Whistles; Musical apparatus (with electro-acoustical transmitters G04C21/00, )
- 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