Film feeder for camera and camera with film feeder

Details Film feeder for camera and camera with film feeder Film feeder for camera and camera with film feeder

1997-02-20

1998-12-08

Gray, David M.

Photography

With film drive

Having significant electronic circuit detail

396410, G03B 1724

Patent

active

058483098

ABSTRACT:
A film feeder for a camera having: a film feeding mechanism for feeding a film out of a film magazine by rotating a winding shaft, around which the film is wound, in the film magazine via a first speed reducer; and a film winding mechanism which takes up the film by rotating a film winding spool shaft via a second speed reducer; wherein the reduction ratio of the first speed reducer is at least twice as large as the reduction ratio of the second speed reducer. A camera provided with a film feeder feeds film out of a film cartridge by rotating a film cartridge spool and rewinds film into the cartridge employing: a single driving source; a driving shaft driving a winding shaft for feeding film; a film spool shaft rewinding film; a first gear train driving the driving shaft to simultaneously drive the winding shaft and the film spool shaft when the drive source rotates in one direction to feed film; and a second gear train driving the driving shaft to simultaneously drive the winding shaft and the film spool shaft when the drive source rotates in an opposite direction to rewind film; the gear ratio between the driving source and the film spool shaft in the second gear train being smaller than the gear ratio between the driving source and the driving shaft for driving the winding shaft.

REFERENCES:
patent: 5136314 (1992-08-01), Kazami et al.
patent: 5251840 (1993-10-01), Niedospial

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