Train wheel of electronic timepiece

Details Train wheel of electronic timepiece Train wheel of electronic timepiece

1988-12-01

1990-03-06

Miska, Vit W.

Horology: time measuring systems or devices

Chronological

With mechanical or electromechanical driven display

368220, G04B 1904, G04B 1902

Patent

active

049072102

ABSTRACT:
A train wheel of an electronic timepiece having more than two motors which drive hand wheels through individual train wheels includes a guide pipe driven and fixed in a bottom plate in the timepiece. The first hand wheel driven by the rotor of the first motor through the first train wheel has a central shaft as its rotational axis. The central shaft of the first hand wheel is inserted into the guide pipe so as to be guided and supported by the inner surface of the guide pipe. The second hand wheel has a central pipe as its rotational axis. The central pipe of the second hand wheel has the guide pipe inserted therein so as to be guided and supported by the outer surface of the guide pipe. Whereby the hand wheels do not come into contact with each other with result that the drive force of one of the hand wheels is not transmitted to the other hand wheel.

REFERENCES:
patent: 4074517 (1978-02-01), Tatsumi et al.
patent: 4308610 (1981-12-01), Walker
patent: 4451161 (1984-05-01), Muller
patent: 4488819 (1984-12-01), Schaffner
patent: 4681464 (1987-07-01), Ray
patent: 4684263 (1987-08-01), Etienne

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