Film magazine having film speed indicating means

Details Film magazine having film speed indicating means Film magazine having film speed indicating means

1975-08-01

1977-05-17

Gonzales, John

Optics: motion pictures

Removable film strip magazine type

354 21, 354202, 352 78C, 242 711, G03B 1726

Patent

active

040245578

ABSTRACT:
A film magazine comprised of a cylindrical portion and a pair of end covers is provided with film speed indicating code means. The cylindrical portion of the film magazine is made of metal sheet applied with an insulating coating layer. The surface of the cylindrical portion is selectively provided with non-coated sections for indicating the film speed of the film loaded therein in accordance with a binary code system. The code which indicates the film speed is sensed by a small number of sensing contacts provided in the camera body. The non-coated sections for indicating the film speed are located in the inaccessible area of the film magazine so that the coding sections may not be damaged.

REFERENCES:
patent: 3444795 (1969-05-01), Nerwin
patent: 3667363 (1972-06-01), Tanaka
patent: 3669532 (1972-06-01), Figge et al.

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