Registers – Coded record sensors – Particular sensor structure
Patent
1984-12-18
1986-06-10
Perkey, William B.
Registers
Coded record sensors
Particular sensor structure
3542891, 235 91C, G03B 1718, G03B 1736
Patent
active
045939837
ABSTRACT:
Photographic apparatus for locating a film cassette in position for the sequential exposure of a plurality of film units contained within the film cassette. The apparatus includes a film counter for indicating the number of unexposed film units remaining within a film cassette, and a film cassette counter which is indexed each time a film cassette is inserted into the apparatus or, alternatively, removed therefrom. When such a camera is returned to a repair facility, the reading of the film cassette counter may be used in connection with reliability studies, warranties, market research on film use, e.g., how much film is exposed in a certain camera model, etc.
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Launie Kenneth J.
Whiteside George D.
Corrigan Alfred E.
Perkey William B.
Polaroid Corporation
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