Calendar watch movement with date-indicating member

Details Calendar watch movement with date-indicating member Calendar watch movement with date-indicating member

1977-04-26

1979-03-06

Schaefer, Robert K.

G04B 1924

Patent

active

041423631

ABSTRACT:
A calendar watch movement with a double cam arrangement that drives the date-indicating wheel one step every 24 hours and locks the wheel between driving periods. The first cam has a hook that engages the toothed inner portion of the date-indicating wheel and advances the wheel by one tooth each 24 hours. The cam also has an arcuate peripheral portion that fits in between two successive teeth and locks the wheel when it is not being advanced. The first cam is integral with a co-axial star wheel which is driven by a second cam having both a hook and an adjacent shoulder that advance the star extensions. The second cam is driven by the hour wheel.

REFERENCES:
patent: 2650467 (1953-09-01), Faure
patent: 3601976 (1971-08-01), Tripet
patent: 3751901 (1973-08-01), Meitinger et al.

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