Film winding system of camera

Details Film winding system of camera Film winding system of camera

1989-04-05

1990-08-14

Gellner, Michael L.

354204, 354217, G03B 112

Patent

active

049491091

ABSTRACT:
A film winding system of a camera, comprising: an electrical motor, a film winding device, a cocking device. Both devices are driven by the motor, for winding a film roll and for cocking a predetermined mechanism, through a differential gearing by which one of the devices is driven selectively. The system further comprises a counter for counting a frame of the film roll, a lock lever for locking the film winding device every time one frame of the film roll is wound up, a dis-lock device for releasing a locked state of the film winding device, an order generator for ordering initiation of initial loading, and a controller operating in such a way that the dis-lock device operates at completion of a cocking operation of the cocking device at a normal film winding operation, while the dis-lock device operates when the order generator operates, and an operation of the dis-lock device is terminated when the predetermined total number of the frames is counted by the counter, and the motor is continuously driven in operation of the dis-lock device.
When the patrone is loaded at a film chamber, the dis-lock device operates and the locked state is released and the motor is driven. Then, the predetermined total number of the frames is wound without any interruption.

REFERENCES:
patent: 3705338 (1972-12-01), Tsujimoto et al.
patent: 4673272 (1987-06-01), Suzuki et al.
patent: 4799078 (1989-01-01), Hayama

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