Calendar mechanism of a portable timepiece

Details Calendar mechanism of a portable timepiece Calendar mechanism of a portable timepiece

1978-05-16

1980-05-27

Miska, Vit W.

Horology: time measuring systems or devices

With calendar indicator

Setting or resetting

368221, G04B 1924, G04B 3300

Patent

active

042043956

ABSTRACT:
A calender mechanism comprising a cannon wheel having a gear wheel portion and a cylindrical portion extending axially from the gear wheel portion, a day star wheel mounted for rotation on a cylindrical portion of the cannon wheel, and a positioning plate. The day star wheel has an outer diameter less than that of the gear wheel portion of the cannon wheel, and the positioning plate is positioned to partially overlie the outer peripheral portion of the gear wheel portion for preventing the cannon wheel from traveling axially toward the day star wheel. The portion of the positioning plate overlying the outer peripheral portion of the cannon wheel does not extend between the day star wheel and the gear wheel portion of the cannon wheel.

REFERENCES:
patent: 3659412 (1972-05-01), Miyasaka et al.
patent: 3765162 (1973-10-01), Ushiyama et al.
patent: 3819929 (1975-04-01), Charbonnet et al.
patent: 3916614 (1975-11-01), Takatsuki
patent: 3939645 (1976-02-01), Charbonnet

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