Camera

Details Camera Camera

1989-02-03

1990-03-20

Gellner, Michael L.

354217, G03B 112, G03B 1736

Patent

active

049105434

ABSTRACT:
A motor-driven camera of the so-called prewind type in which a film is preliminary wound to effect a prewinding action and then the film is rewound for every photographing shot, includes an electric film counter which counts the number of frames on the basis of a signal generated according to the movement of the film; a control circuit which determines the number of photographable frames on the basis of a counted value of the electric film counter; a detection circuit which detects the completion of the prewinding action by detecting that the film ceases to move; and a judgment circuit which is arranged to detect the state of the above-stated signal after the lapse of a predetermined period of time from the completion of the prewinding action detected by the detection circuit, to judge whether or not a change in the counted value of the electric film counter is necessary.

REFERENCES:
patent: 4540261 (1985-09-01), Matsumoto et al.
patent: 4540928 (1985-09-01), Marhoefer
patent: 4590412 (1986-05-01), Mokdad et al.
patent: 4676621 (1987-06-01), Malloy Desormeaux
patent: 4700120 (1987-10-01), Janes
patent: 4709199 (1987-11-01), Wang et al.
patent: 4713594 (1987-12-01), Bose et al.

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