System for controlling film transport for camera

Details System for controlling film transport for camera System for controlling film transport for camera

1986-12-09

1988-03-01

Gellner, Michael L.

354217, G03B 112, G03B 160

Patent

active

047289767

ABSTRACT:
A film transport control system in a camera, including a central processing unit programmed to control a film transport motor to transport film for one frame and also to start operating a liquid crystal display unit in response to a signal intermittently generated by a one-frame feed switch actuated in timed relation to movement of the film in the camera. The central processing unit issues a film rewinding failure warning if a predetermined number of signals are not supplied by the one-frame feed switch within a preset period of time from the time when the film starts being rewound. The time when signals are no longer applied by the one-frame feed switch for a predetermined period of time is regarded as a film rewinding completion time by the central processing unit if a predetermined number of signals or more are applied by the one-frame feed switch when the film starts to be rewound.

REFERENCES:
patent: 4643552 (1987-02-01), Takahashi

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