Photographic camera

Details Photographic camera Photographic camera

1982-09-27

1984-04-03

Gellner, Michael L.

354206, 354213, 354214, 354215, 35428912, G03B 1718, G03B 1742

Patent

active

044404816

ABSTRACT:
A photographic camera of a type utilizing a roll of film comprises a camera back lid, a take-up spool for taking up the film therearound, and a plurality of switches incorporated in the take-up spool. The switches built in the take-up spool are all closed, when the film is turned around the spool, to generate a signal inidcative of the fact that the film has no doubt been secured to the spool. An electric circuit is also provided for disabling the film wind-up so long as the camera back lid has not yet been closed even though the film has already loaded in the camera.

REFERENCES:
patent: 4174888 (1979-11-01), Hunn et al.

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