Electric watch

Details Electric watch Electric watch

1986-05-16

1987-07-14

Roskoski, Bernard

Horology: time measuring systems or devices

Electrical time base

Solid state oscillating circuit type

368160, 310 49R, G04F 500

Patent

active

046799443

ABSTRACT:
The invention relates to an electric watch, wherein the rotor of a stepping motor is arranged between the metal frame and the plastic frame and is mounted in bearing holes of these frames or base plates. In accordance with the invention, the plastic frame has adjacent to the bearing hole of the rotor a partially cylindrical web extending substantially perpendicular to the metal frame and penetrating the air gap between the rotor and the stator of the stepping motor, while the stator with the associated coil is mounted on the outer side of the plastic frame. This construction enables assembly of the rotor without the effects of disturbing magnetic interaction between rotor and stator tending to dislocate the rotor.

REFERENCES:
patent: 4426158 (1984-01-01), Muller et al.

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