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

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

1977-03-03

1979-03-06

Hix, L. T.

354 60E, 354195, 354198, 354199, G03B 1720, G03B 1302

Patent

active

041427882

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: 3868700 (1975-02-01), Kuramoto
patent: 3972056 (1976-07-01), Tsujimoto et al.
patent: 4031383 (1977-06-01), Hosoe et al.
patent: 4067030 (1978-01-01), Kuramoto et al.

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