Electrical shutter of electromagnetic release type for camera ha

Details Electrical shutter of electromagnetic release type for camera ha Electrical shutter of electromagnetic release type for camera ha

1981-02-06

1982-02-16

Gellner, Michael L.

354234, G03B 7083

Patent

active

043156789

ABSTRACT:
An electrical shutter including a first electromagnet for initiating opening of the shutter and a second electromagnet for initiating closing of the shutter. Each of the electromagnets has an operational time lag associated therewith, and the time lag of the first electromagnet is greater than the time lag of the second electromagnet. The control circuit of the present invention includes delay means, in the form of a variable resistor, for delaying the energization of the second electromagnet to compensate for the difference in the time lags of the first and second electromagnets.

REFERENCES:
patent: 3721166 (1973-03-01), Yanagi et al.
patent: 3903534 (1975-09-01), Ito

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