Controlling circuit for electric shutters

Details Controlling circuit for electric shutters Controlling circuit for electric shutters

1977-09-30

1978-12-12

Gellner, Michael L.

354 51, G03B 962

Patent

active

041293703

ABSTRACT:
A controlling circuit for electric shutters comprising at least one constant current circuit, a pair of capacitors to be charged in advance by a current source battery through the constant current circuit and a pair of driving coils to be energized in turn by discharge currents of the pair of capacitors to start a shutter blade opening motion and closing motion so that the current source battery of a comparatively small capacity may be effectively used.

REFERENCES:
patent: 3953867 (1976-04-01), Kondo
patent: 4072965 (1978-02-01), Kondo

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