Thin stepping motor watch

Details Thin stepping motor watch Thin stepping motor watch

1981-04-27

1983-03-15

Truhe, J. V.

Horology: time measuring systems or devices

Display trains

368 77, 368221, 368233, G04B 1904

Patent

active

043769969

ABSTRACT:
A quartz analog watch has a disc with a minute hand thereon driven directly at its periphery by the rotor of a stepping motor. A single intermediate gear and pinion assembly performs a gear reduction to drive a conventional hour hand rotatably mounted on a center spindle which also supports the minute disc. The stepping motor watch internal components, including battery, stepping motor, intermediate gear assembly and integrated circuit are all partially hidden beneath the minute disc. A special watch crystal functions also as a top frame member controlling "endshake" of the movement members in conjunction with the caseback. A special metal clip provides a push button contact for electrically setting the watch and also holds the intermediate gear assembly in place.

REFERENCES:
patent: Re22640 (1937-04-01), Prins
patent: 2749704 (1956-06-01), Heikkila
patent: 2794314 (1957-06-01), Slaugh
patent: 3538703 (1970-11-01), Walton
patent: 3668858 (1972-06-01), Hartwig
patent: 3854280 (1974-12-01), Wuthrich
patent: 4249251 (1981-02-01), Wuthrich

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