Motor-driven movement for timepiece

Details Motor-driven movement for timepiece Motor-driven movement for timepiece

1981-12-31

1984-03-06

Weldon, Ulysses

Horology: time measuring systems or devices

Chronological

With mechanical or electromechanical driven display

368 80, 368220, 368228, 310 40MM, G04B 1900

Patent

active

044350872

ABSTRACT:
Motor-driven movement for timepieces wherein stator block core is formed in ring-shape with a magnetic material of a rounded bar, magnetic poles formed at both core ends are disposed as directed radially inward of the core and rotary shaft of minute hand wheel of output gear train meshing with a rotor disposed between the poles is radially displaced from the center of the core to the side opposite the magnetic poles, whereby internal space of the ring-shaped core having a coil wound thereon is efficiently utilized for arranging all internal components substantially within dimensions of the coil and minimizing the entire size of the movement.

REFERENCES:
patent: 388512 (1888-08-01), Gestel
patent: 3403272 (1968-09-01), Dold
patent: 3538703 (1970-11-01), Walton
patent: 3626263 (1971-12-01), McBride
patent: 3888074 (1975-06-01), Wagenknecht et al.
patent: 3979616 (1976-09-01), Stechmann
patent: 4012899 (1977-03-01), Matsuura et al.
patent: 4141210 (1979-02-01), Flaig

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