Film winding error prevention apparatus

Details Film winding error prevention apparatus Film winding error prevention apparatus

1986-03-10

1987-04-07

Griffin, Donald A.

354217, G03B 100, G03B 1736

Patent

active

046555730

ABSTRACT:
In a photographic camera, a manual wind member for rotating a take-up spool to wind a filmstrip into the spool is locked each time a fresh film frame is advanced to an exposure position and is unlocked automatically after the picture is taken. If however the filmstrip cannot be advanced in the camera because the film leader has failed to be wound onto the take-up spool, the manual wind member will not be locked, and therefore it can be actuated continuously to alert the photographer of such failure.

REFERENCES:
patent: 2226161 (1940-12-01), Drotning
patent: 3406621 (1968-10-01), Irwin
patent: 3641897 (1972-02-01), Fujimoto
patent: 4134657 (1979-01-01), Nomura
patent: 4340291 (1982-07-01), Berg

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