Optics: motion pictures – Removable film strip magazine type
Patent
1975-03-24
1977-08-23
Hayes, Monroe H.
Optics: motion pictures
Removable film strip magazine type
352172, G03B 2302, G03B
Patent
active
040436489
ABSTRACT:
A film counter for use with a portable cine-camera capable of selectively using two types of cartridges, respectively, containing photographic films of different lengths. The film counter comprises a cartridge detection mechanism having a detection lever which is operated only when one of the two types of cartridges is loaded in the camera. A gear train assembly is provided for driving a counter indicator at a speed ratio corresponding to the length of the photographic film. The gear train assembly is switched between first and second speed ratios under control of the detection lever. The detection lever also controls a counter indicator by switching the numbers displayed on the counter indicator to a group of numbers suitable for the film length in the type of cartridge loaded in the camera.
REFERENCES:
patent: 3578856 (1971-05-01), Thate
patent: 3601479 (1971-08-01), Komine
patent: 3807841 (1974-04-01), Dudley
patent: 3918802 (1975-11-01), Sakaguchi
Hayes Monroe H.
Sankyo Kogaku Kogyo Kabushiki Kaisha
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