Power supply resetting circuit for camera

Details Power supply resetting circuit for camera Power supply resetting circuit for camera

1978-07-14

1980-04-15

Gellner, Michael L.

354266, G03B 708, G03B 1738

Patent

active

041981421

ABSTRACT:
The power supply resetting circuit of the invention is adapted to be used in such a type of camera that the shutter release action comprises two steps of strokes: a first stroke by which a power supply circuit for electric circuits mounted in the camera, such as a light measuring circuit, is closed, and a second stroke by which at least the operation of the circuits mounted in the camera is started. The power supply resetting circuit has a self-holding circuit for closing the power supply circuit and additionally mounted to the electric circuits in the camera. The self-holding circuit is adapted to be turned into operation by the second stroke of the shutter release action, substantially simultaneously with the starting of operation of the circuits mounted in the camera, and to be turned inoperative, so as to break the power supply circuit, at the instant at which the photographing sequence is completed or with a certain time lag to that instant.

REFERENCES:
patent: 3693524 (1972-09-01), Furuta
patent: 4003063 (1977-01-01), Takahashi et al.
patent: 4114173 (1978-09-01), Tezuka et al.

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