Driving device for an electric timepiece

Details Driving device for an electric timepiece Driving device for an electric timepiece

1978-07-25

1979-09-18

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310103, 310 83, 310114, 310 49R, G04B 1930

Patent

active

041678486

ABSTRACT:
A driving device including a magnetized driving rotor mounted for rotation within a magnetic field produced in a coreless coil, and, in order to make the magnetic pole of said driving rotor deviate by a definite angle relative to the magnet field direction of said coil, a supplementary magnetized rotor mounted for rotation outside of the coil and magnetically coupled with the driving rotor. And the supplementary rotor is provided with magnetic poles, the number thereof being greater than the number of poles of said driving rotor. The driving rotor has an odd number of pole pairs.

REFERENCES:
patent: 3041513 (1962-06-01), Reiches
patent: 3523204 (1970-08-01), Rand
patent: 3790833 (1974-02-01), Hasebe
patent: 3863084 (1975-01-01), Hasebe
patent: 4037400 (1977-07-01), Kitai et al.
patent: 4084403 (1978-04-01), Kitai et al.
patent: 4104859 (1978-08-01), Ogihara et al.

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