Electric driving device

Details Electric driving device Electric driving device

1979-10-09

1981-07-21

Hix, L. T.

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

354214, 318282, 318293, 318261, G03B 100

Patent

active

042794900

ABSTRACT:
In the disclosed device, forward and reverse rotation of a motor is used to wind and rewind a camera. A first semi-conductor switching element becomes conductive during winding and a second semi-conductor switching element becomes conductive during rewinding, the switching elements being connected in series across a power source. A selector switch has its fixed terminals connected to opposite poles of the power source. The motor is connected between the armature of the selector switch and the point between the switching elements. Driving circuits operate the switches so that the motor is driven in one direction when the selector switch is in one position and the reverse direction when the selector switch is in the other position and arranged to brake the motor after rewinding has stopped.

REFERENCES:
patent: 3219899 (1965-11-01), Kasper
patent: 3471103 (1969-10-01), Gabor
patent: 3731170 (1973-05-01), Emmert
patent: 4176936 (1979-12-01), Kozuki et al.

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