Automatic exposure control device for a camera including automat

Details Automatic exposure control device for a camera including automat Automatic exposure control device for a camera including automat

1976-10-28

1978-02-14

Hix, L. T.

354 37, 354 59, G03B 700

Patent

active

040742865

ABSTRACT:
An automatic exposure control device built in a camera body provided with a flash-matic means for controlling the diaphragm aperture when taking pictures with flash light as well as an exposure control circuit for controlling the shutter speed or the diaphragm aperture in accordance with the scene brightness measured with a photodetector includes an automatic film speed setting means. The film speed setting means is comprised of a film speed sensing contact pair which senses a particular conductor attached to the surface of a film magazine containing a film of particularly high film speed, an electromagnet connected in series with the sensing contact pair, and a mechanism controlled by the electromagnet to selectively take one of two positions. In one position, a light control member is put into a position to bring an aperture for the normal film speed into alignment with the photodetector of the exposure control circuit and to bring a cam for the normal film speed into alignment with a film speed input lever of a flash-matic means. In the other position, an aperture and a cam for a special film speed are brought into alignment with the photodetector and the film speed input lever.

REFERENCES:
patent: 3636847 (1972-01-01), Akasaka
patent: 3667363 (1972-06-01), Tanaka
patent: 3852777 (1974-12-01), Lieser
patent: 4000497 (1976-12-01), Galbraith, Jr.

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