Differential gear for motor driven photographic system

Details Differential gear for motor driven photographic system Differential gear for motor driven photographic system

1995-05-18

1996-09-10

Hayes, Monroe H.

G03B 100

Patent

active

055550576

ABSTRACT:
A differential gear mechanism for loading, advancing, rewinding and unloading photographic film, and in particular, film in a thrust film cartridge, for a photographic system. The differential gear includes a sun gear, which is rotatable, a planetary gear, which is rotatable by the sun gear, a drive spindle which is rotatable by the planetary gear to advance and rewind photographic film, a carrier plate, which is rotatable by the planetary gear, a drive gear, which is rotatable by the carrier plate for positioning the door of a film cartridge in either the open or closed position, and a torque control lever, for selectively locking or releasing one or both of the drive spindle and/or carrier plate so the planetary gear can selectively rotate one or both of the drive spindle or the carrier plate.

REFERENCES:
patent: 3800310 (1974-03-01), Umeda
patent: 4162837 (1979-07-01), Haragushi
patent: 5025277 (1991-06-01), Inoue et al.
patent: 5105212 (1992-04-01), Kitazawa
patent: 5138352 (1992-08-01), Maeno
patent: 5220370 (1993-06-01), Hawai et al.

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