Manual date advance mechanism for a watch

Details Manual date advance mechanism for a watch Manual date advance mechanism for a watch

1979-10-15

1981-09-22

Miska, Vit W.

Horology: time measuring systems or devices

With calendar indicator

Setting or resetting

368 38, G04B 1924

Patent

active

042913977

ABSTRACT:
A lever actuated by a manual pushbutton for advancing the date ring of a calendar watch so as to correct for months having less than 31 days. A special date change lever incorporates a tab actuated by the pushbutton, a first integral spring portion for biasing the lever to a normal rest position, a second integral spring portion for biasing an arm with a tab against the teeth of the date ring for advancing the date ring.

REFERENCES:
patent: 3413800 (1968-12-01), Dubois et al.
patent: 3659413 (1972-05-01), Tanaka et al.
patent: 3732687 (1973-05-01), Miyasaka et al.

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