Camera

Details Camera Camera

1994-09-20

1996-10-15

Gellner, Michael L.

Photography

Having camera indicator

Film condition indicator

2423334, 226 45, 396310, G03B 118

Patent

active

055659446

ABSTRACT:
A film feeding amount detection apparatus of a camera includes a roller device which rotates in a driven manner with respect to the movement of a film, a reflecting device which shares the use of the rotation shaft with the roller device and which is formed into a polygonal pillar shape such that a plurality of reflecting surfaces are formed on the outer periphery of the rotation shaft, and a light projection and receiving device, which is disposed at a position facing the reflecting surfaces formed on the reflecting device, for projecting light to the reflecting surface portion and receiving light reflected back therefrom.

REFERENCES:
patent: 4554560 (1985-11-01), Kanaoka et al.
patent: 4980549 (1990-12-01), Baldwin
patent: 5182590 (1993-01-01), Kaihara et al.
patent: 5184246 (1993-02-01), Schwartz et al.
patent: 5328072 (1994-07-01), Ruessmann et al.
patent: 5359460 (1994-10-01), Urakawa
patent: 5398090 (1995-03-01), Ezawa
patent: 5426477 (1995-06-01), Kume et al.
patent: 5502602 (1996-03-01), Shimizu et al.

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