Driving circuit for camera shutters

Details Driving circuit for camera shutters Driving circuit for camera shutters

1977-12-09

1980-02-26

Hix, L. T.

354267, G03B 908

Patent

active

041903447

ABSTRACT:
A shutter driving circuit including a voltage judging circuit and indicating circuit in order to always properly make shutter opening and closing operations, whereby an electric current is prevented from flowing to driving coils and such state can be indicated by the indicating circuit when the voltage of a current source for feeding a current to a pair of driving coils to be made to make opening and closing motions of the shutter by the voltage judging circuit is below a predetermined value.

REFERENCES:
patent: 3533345 (1970-10-01), Starp
patent: 3765006 (1973-10-01), Takahashi et al.
patent: 3776116 (1973-12-01), Miyakawa et al.
patent: 3947855 (1976-03-01), Inoue et al.
patent: 4024553 (1977-05-01), Maitani et al.

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