Stepping motor for electronic clock

Details Stepping motor for electronic clock Stepping motor for electronic clock

1977-04-28

1979-07-24

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310163, 310164, 58 23D, H02H 3717

Patent

active

041624181

ABSTRACT:
A compact stepping motor for an electronic clock which features high stability in the direction of the motor rotation and small electric power consumption is provided with a rotor and a stator that surrounds the rotor and includes portions having a recess formed therein and two pairs of projecting magnetic pole pieces positioned asymmetrically relative to the end of their respective recesses.

REFERENCES:
patent: 3857053 (1974-12-01), Yatsushiro et al.
patent: 3989967 (1976-11-01), Kikuyama et al.
patent: 4004168 (1977-01-01), Haydon
patent: 4048548 (1977-09-01), Nakajima et al.
patent: 4055785 (1977-10-01), Nakajima et al.
patent: 4066947 (1978-01-01), Nakajima et al.
patent: 4088909 (1978-05-01), Matsumura et al.

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