Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Patent
1976-11-16
1978-09-05
Rubinson, Gene Z.
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
318129, G04C 300
Patent
active
041109686
ABSTRACT:
A step motor in a horological device is connected in a control circuit such that the motor is fed by a battery under the control of a reference oscillator, a frequency divider, a power stage and a shaper. The power stage comprises MOS power transistors exclusively of N-MOS type connected in pairs such that one transistor has its emitter connected to one terminal of the battery and its collector connected to one terminal of the motor coil and to the emitter of the second transistor, whereas the second transistor has a collector connected to the other terminal of the battery. The shaper delivers voltage to the power transistors via a voltage booster in the form of a capacitor so that the control pulses are of a voltage much higher than the voltage of the battery itself. When the motor is of bi-polar type a second pair of power transistors is connected to the other terminal of the coil in similar fashion.
REFERENCES:
patent: 3363410 (1968-01-01), Mahashi
patent: 3668860 (1972-06-01), Diersbock
patent: 3906256 (1975-09-01), Suzuki et al.
patent: 3937003 (1976-02-01), Busch et al.
patent: 3955353 (1976-05-01), Astle
patent: 4014165 (1977-03-01), Barton
Miska Vit W.
Rubinson Gene Z.
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