Photography – With film drive – Double exposure prevention
Patent
1996-12-12
1998-06-16
Gray, David M.
Photography
With film drive
Double exposure prevention
G03B 1902
Patent
active
057686467
ABSTRACT:
A camera capable of automatic film rewinding into the magazine, comprises an information recording device for recording at least information on use in an information recording portion formed at a pre-determined position of the magazine loaded in the magazine chamber of the camera, an information detecting device capable of detecting recorded information of the magazine when it is loaded, a prohibition device for prohibiting the photographing operation in response to a detection signal corresponding to information, indicating that all the film is already used, detected by the information detecting device and a control device for controlling the information recording device, information detecting device and prohibition device in such a manner that the detection by the information detecting device is conducted prior to the recording of information of use by the information recording device, and that the photographing operation is prohibited in response to the detection of information indicating that all the film is already used.
REFERENCES:
patent: 4311377 (1982-01-01), Matteson
patent: 4425590 (1984-01-01), Johnstone et al.
patent: 4443077 (1984-04-01), Tanikawa
patent: 4678299 (1987-07-01), Harvey
patent: 4678300 (1987-07-01), Beach
patent: 5541691 (1996-07-01), Inoue
Gray David M.
Nikon Corporation
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