Lavet stepping motor with U-shaped coil core

Details Lavet stepping motor with U-shaped coil core Lavet stepping motor with U-shaped coil core

1986-05-16

1988-01-19

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310162, H02K 3700

Patent

active

047206446

ABSTRACT:
A stator for a stepping motor of an electric watch comprises an elongated yoke member having a free end, a coil arm integrally formed on the other end of the yoke member and having a free end, an exciter coil arranged on the coil arm by being pushed onto this coil arm from the free end thereof, and a bridge member connecting the free ends of the yoke member and the coil arm, the yoke member with the coil arm and the bridge member hereby being flat elements made of a magnetizable sheet metal. In accordance with the invention, the coil arm is of a greater length then the exciter coil and the bridge member rests flat on the free ends of the yoke member and the coil arm and areally overlaps regions of these elements.

REFERENCES:
patent: 4262223 (1981-04-01), Cleusix
patent: 4277704 (1981-07-01), Giger et al.
patent: 4473766 (1984-09-01), Obergfell et al.

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