Electrical power supply circuit in a camera

Details Electrical power supply circuit in a camera Electrical power supply circuit in a camera

1984-10-04

1987-01-13

Perkey, William B.

G03B 726

Patent

active

046360565

ABSTRACT:
In a camera where the light metering circuit is supplied with electrical power by pushing the shutter release button to a first stroke, an electrical power supply circuit is constructed in such a way that when the time for which the shutter release button remains at the first stroke exceeds the prescribed period of time, the electrical power supply is stopped, and then when the release button is pushed down further to a second stroke, the electrical power supply starts again.

REFERENCES:
patent: 3879137 (1975-04-01), Sakazaki et al.
patent: 4034385 (1977-07-01), Arai
patent: 4253750 (1980-03-01), Maida
patent: 4269496 (1981-05-01), Motoori et al.
patent: 4302083 (1981-11-01), Kawamura et al.
patent: 4429974 (1984-02-01), Suzuki et al.

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