Power source switch for use in camera circuit to detect a focuse

Details Power source switch for use in camera circuit to detect a focuse Power source switch for use in camera circuit to detect a focuse

1978-08-23

1981-09-08

Hix, L. T.

354 61, 354198, 354289, G03B 1318, G03B 1720

Patent

active

042881510

ABSTRACT:
The present invention relates to a power source used in a camera having a circuit for detecting a focused condition determining the distance at which the focused condition is established. The invention is particularly suited; for preventing careless opening of the power source by providing an operating member on the lens barrel or a light or temperature sensing element either in the lens barrel or in the view finder respectively. In this manner the power supply switch is functionally engaged in the operating member or operates in response to the output of either the light or temperature sensing element so as to close the current supply circuit.

REFERENCES:
patent: 3442193 (1969-05-01), Pagel
patent: 3486432 (1969-12-01), Norwood
patent: 3668342 (1972-06-01), Pritulsky
patent: 3677155 (1972-07-01), Bechmann
patent: 3820129 (1974-06-01), Hosoe et al.
patent: 3868700 (1975-02-01), Kuramoto
patent: 3972056 (1976-07-01), Tsujimoto
patent: 4004852 (1977-01-01), Pentecost
patent: 4031383 (1977-06-01), Hosoe et al.
patent: 4067030 (1978-01-01), Kuramoto et al.

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