Calendar mechanism for timepieces

Details Calendar mechanism for timepieces Calendar mechanism for timepieces

1978-07-24

1980-01-08

Miska, Vit W.

58 58, G04B 1924

Patent

active

041821092

ABSTRACT:
A calendar mechanism for timepieces comprising an annular date dial, an annular month dial provided outside the date dial, an auxiliary lever provided on the date dial having a pawl portion, an additional driving member adapted to be rotated one full turn every 24 hours, and cam means provided on the month dial, which biases the auxiliary lever toward the additional driving member to engage the pawl portion of the auxiliary lever with the driving member in the end of the even months, whereby the date dial may be driven two steps by operation of the usual driving means and the operation of the additional driving member in the end of the even month.

REFERENCES:
patent: 3477222 (1969-11-01), Zeung et al.
patent: 3673789 (1972-07-01), Tsuzuki et al.
patent: 3716983 (1973-02-01), Tanaka et al.
patent: 3827234 (1974-08-01), Imanishi
patent: 4026100 (1977-05-01), Kume et al.

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