Photography – With film drive – Double exposure prevention
Patent
1996-05-23
1997-08-05
Perkey, W. B.
Photography
With film drive
Double exposure prevention
348 96, G03B 100, H04N 1036
Patent
active
056551681
ABSTRACT:
A camera of the kind using a film cartridge capable of setting various film usage conditions permits normal photographing actions when the camera is loaded with the film cartridge in an unused condition and inhibits photographing actions when the camera is loaded with the film cartridge in a completely used condition. The operating modes of the camera include a test mode in which photographing actions can be carried out for tests at a factory by loading the camera with the film cartridge in any of the film usage conditions.
REFERENCES:
patent: 4974096 (1990-11-01), Wash
patent: 4980709 (1990-12-01), Cocca
patent: 5479226 (1995-12-01), Kazami et al.
Canon Kabushiki Kaisha
Perkey W. B.
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