Control device for the rotary motor of a watch

Details Control device for the rotary motor of a watch Control device for the rotary motor of a watch

1976-01-20

1977-06-21

Schaefer, Robert K.

Electricity: motive power systems

Braking

Automatic and/or with time-delay means

318341, G05B 500

Patent

active

040314383

ABSTRACT:
A control device for the motor of a watch including first and second zero detectors and a delay device for providing gating signals to an AND gate to enable transmission of driving in phase with the a.c. voltage induced in the coil.

REFERENCES:
patent: 3525915 (1970-08-01), Barter
patent: 3536971 (1970-10-01), McMillen et al.
patent: 3555387 (1971-01-01), Ulrich
patent: 3588654 (1971-06-01), Balazs
patent: 3683253 (1972-08-01), Rummel et al.
patent: 3885206 (1975-05-01), Hort

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