Safety device for an exposure amount control equipment

Details Safety device for an exposure amount control equipment Safety device for an exposure amount control equipment

1976-04-02

1978-11-21

Gellner, Michael L.

354152, 354267, 354 60R, G03B 1505, G03B 1738

Patent

active

041268776

ABSTRACT:
The present invention relates to a safety device for exposure amount control equipment consisting of a camera and an electronic flash device, including a detecting circuit for detecting the charge voltage of the storage capacitor of the electronic flash device and the voltage of the power source and producing two different electrical signals in accordance with the detected voltages so as to prevent flash light photography with improper exposure amount and a lock member for preventing the movement of a shutter release mechanism of the camera in accordance with the electrical signal produced in the detecting circuit when the detected voltages are lower than a certain determined value.

REFERENCES:
patent: 3439597 (1969-04-01), Wagner
patent: 3535991 (1970-10-01), Kitai
patent: 3706266 (1972-12-01), Uno et al.
patent: 3723810 (1973-03-01), Mashimo
patent: 3953864 (1976-04-01), Iwata et al.
patent: 3971049 (1976-07-01), Ohmuri et al.

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