Annual calendar mechanism for a timepiece

Details Annual calendar mechanism for a timepiece Annual calendar mechanism for a timepiece

1994-07-12

1995-07-11

Miska, Vit W.

Horology: time measuring systems or devices

With calendar indicator

368 37, G04B 1924

Patent

active

054327598

ABSTRACT:
The annual calendar mechanism includes a calendar driving wheel (18) provided with a finger (17) adapted to drive a date wheel (19) through one step at the end of each month. An annual wheel (25), driven through two steps once per month by a long tooth (23) borne by an intermediate wheel (21), itself meshing with the date wheel (19), includes a plate (27) bearing five teeth (28). If one of these five teeth, corresponding to one of the months of less than thirty-one days, comes into the path of finger (17), the annual wheel, from being driven, becomes driving and drives the date wheel through an additional step via the intermediate wheel.

REFERENCES:
patent: 4541725 (1985-09-01), Baumgartner et al.
patent: 4674889 (1987-06-01), Klaus
patent: 4974242 (1990-11-01), Vuilleumier
patent: 5235562 (1993-08-01), Vaucher

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