Photography – Camera detail – Detachable or removable film holder unit
Patent
1997-02-06
1998-05-12
Mathews, A. A.
Photography
Camera detail
Detachable or removable film holder unit
396411, 396446, 396538, G03B 104, G03B 1702, G03B 1726
Patent
active
057521182
ABSTRACT:
A camera has a cartridge mounting chamber which receives a film cartridge with a cartridge spool, a film exit, and a light-intercepting door. The camera includes a spindle for holding the cartridge spool, a drive mechanism for rotating the spindle in a first direction to feed the film during the photographing operation and in a second direction to wind up the film after completing the photographing operation. The drive mechanism includes a sun gear, a first planetary gear and a second planetary gear engaging the sun gear, and a planetary carrier holding the first and second planetary gears and disposed coaxially with the sun gear. The sun gear is rotatable in two directions for turning the planetary carrier between a first position, in which the first planetary gear drives the spindle in the first direction, and a second position in which the second planetary gear drives the spindle in the second direction. A door driving gear engages with one of the first and second planetary gears before the planetary carrier reaches the first position so as to open the light-intercepting door of said film cartridge before the spindle is rotated in the first direction.
REFERENCES:
patent: 5481325 (1996-01-01), Wada et al.
patent: 5555057 (1996-09-01), DiRisio
patent: 5630192 (1997-05-01), Kobayashi
Mathews A. A.
Shansun Technology Company. Ltd.
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