Optics: motion pictures – Removable film strip magazine type
Patent
1974-02-25
1976-06-15
Hayes, Monroe H.
Optics: motion pictures
Removable film strip magazine type
352 78C, 352141, G03B 2302
Patent
active
039633330
ABSTRACT:
A control system for a cassette-load movie camera having an automatic exposure control system. A variable neutral density filter adjusts the exposure control system to the film sensitivity, and a sensitivity range control adjusts the exposure control system alternatively for a range of high film sensitivities or a range of low film sensitivities. Cassette indicia automatically effect a filter setting and sensitivity range setting upon placement of the cassette within the camera. A switching system controls energization of the exposure control system in relation to energization of the camera drive motor.
REFERENCES:
patent: 2186611 (1940-01-01), Martin
patent: 3176599 (1965-04-01), Anwyl
patent: 3312158 (1967-04-01), MacMillin
patent: 3505937 (1970-04-01), Albedyll
patent: 3604327 (1971-09-01), Hirata
patent: 3626829 (1971-12-01), Iida
patent: 3667363 (1972-06-01), Tanaka
Figge Erwin E.
Mueller Arthur C.
Hayes Monroe H.
Polaroid Corporation
Thornton David R.
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