Film takeup spool for camera

Details Film takeup spool for camera Film takeup spool for camera

1981-06-30

1983-09-06

Levy, Stuart S.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242 718, 242 711, G03B 104, B65H 7524

Patent

active

044024681

ABSTRACT:
A film takeup spool provided with pawls in the interior of a sleeve hub thereof at such a location that pivot pins of the pawls are off-set from the axis of rotation of the sleeve hub. The pawls are urged by respective springs to project their teeth radially outwardly of the sleeve hub into the perforations of the film. When the spool is driven to rotate with a sufficient tension of the film, the pawl teeth are retracted into the sleeve hub, thus permitting a smooth winding up of the film on the sleeve hub of the takeup spool.

REFERENCES:
patent: 2701507 (1955-02-01), Bergerhoff
patent: 3752416 (1973-08-01), Fukatsu
patent: 4275855 (1981-06-01), Wakabayashi

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