End of film detection device

Details End of film detection device End of film detection device

1986-07-01

1988-01-26

Perkey, W. B.

3541731, 354215, G03B 100

Patent

active

047219700

ABSTRACT:
A camera, typically a security camera utilizing film in a cartridge, with means for determining when the film in the cartridge has been exhausted. A radiation emitter with the wavelength of the emitted radiation outside the sensitivity range of the film, a detector for the radiation of the emitter, and a reflecting surface, with the reflecting surface on one side of the film and the emitter and detector on the other side of the film so that presence of film blocks the radiation path from the emitter to the reflecting surface to the detector. A control circuit for controlling camera operation, with the radiation detector output serving to shut off power to the motor when the film supply is exhausted.

REFERENCES:
patent: 3677627 (1972-07-01), Johnston et al.
patent: 3753612 (1973-08-01), Okey et al.
patent: 3811768 (1974-05-01), Zahn et al.
patent: 4171893 (1979-10-01), Kawazoe
patent: 4174888 (1979-11-01), Hunn et al.
patent: 4176927 (1979-12-01), Wagensonner
patent: 4299466 (1981-11-01), Harvey et al.
patent: 4304480 (1981-12-01), Fukahori et al.
patent: 4311377 (1982-01-01), Matterson
patent: 4319812 (1982-03-01), Williams
patent: 4373796 (1983-02-01), Matsuura et al.
patent: 4385814 (1983-05-01), Elliott
patent: 4401376 (1983-08-01), Pomazi
patent: 4477163 (1984-10-01), Matsumoto et al.
patent: 4552833 (1985-11-01), Kanaoka et al.
patent: 4570876 (1986-02-01), Andoh et al.
patent: 4632530 (1986-12-01), Iwata et al.
patent: 4967887 (1976-07-01), Suzaki et al.

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