Small stepping motor driven watch

Details Small stepping motor driven watch Small stepping motor driven watch

1986-04-14

1987-03-03

Roskoski, Bernard

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368160, G04F 500

Patent

active

046472185

ABSTRACT:
A movement for a two-hand quartz analog watch driven by a Lavet-type stepping motor has a minute hand on a shaft driven by a large center wheel overlapping the energy cell. The center wheel has 60 radial slots directly engaging and driven by the stepping motor rotor through a pair of diametrically opposed driving pins disposed in adjacent radial slots of the center wheel. The driving circuit steps the rotor 180 degrees once each minute. A reduction gear drives the hour hand mounted on a center pinion.

REFERENCES:
patent: 4084403 (1978-04-01), Kitai et al.
patent: 4128922 (1978-12-01), Egger et al.
patent: 4335454 (1982-06-01), Yamada
patent: 4357695 (1982-11-01), Bachmann
patent: 4443112 (1984-04-01), Stotz et al.
patent: 4483627 (1984-11-01), Muller et al.

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