Step motor for quartz crystal electronic timepiece

Details Step motor for quartz crystal electronic timepiece Step motor for quartz crystal electronic timepiece

1974-12-27

1976-09-07

Weldon, Ulysses

Electrical generator or motor structure

Dynamoelectric

Rotary

310 40MM, G04C 300

Patent

active

039786510

ABSTRACT:
A step motor particularly suited for use in a quartz crystal electronic timepiece and adapted to minimize adjustment and fixing of the step motor is provided. The step motor includes a coil adapted to receive a timekeeping signal of a predetermined frequency. A low permeable reference member having two high permeable stator yokes integrally mounted thereto is provided, said yokes being electrically coupled to said coil to be magnetized thereby in a first and second magnetic orientation in response to the application of the timekeeping signal to the coil. A permanent magnet rotor is surrounded by the stator yokes, the rotor being stepped in response to each change in the magnetic orientation of the stator yokes.

REFERENCES:
patent: 2589959 (1952-03-01), Quick
patent: 2798171 (1957-07-01), Craddock
patent: 2909685 (1959-10-01), Szabo
patent: 3390289 (1968-06-01), Dijken et al.
patent: 3541778 (1970-11-01), Ingenito et al.
patent: 3737746 (1973-06-01), Cielaszyk et al.
patent: 3810354 (1974-05-01), Naikaido et al.

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