Sprocket wheel for advancing film and device for advancing film

Details Sprocket wheel for advancing film and device for advancing film Sprocket wheel for advancing film and device for advancing film

1993-07-20

1994-07-26

Gellner, Michael L.

Optics: motion pictures

Camera and/or projector drive mechanisms

352187, 352190, 352191, G03B 100

Patent

active

053330200

ABSTRACT:
Mounted on a horizontal shaft 1 extending along surfaces of a film f are sprocket wheels 2 each having three tooth pairs 2a adapted to engage with perforations on the film. The tooth pairs 2a are angularily spaced apart from each other by 120 degrees around a periphery of the sprocket wheel 2. A triangular cam 11 is attached on one end of a horizontal shaft 7 rotatable in unison with the shaft 1. A lever 17 is attached to a horizontal shaft 15 carrying a cam follower 16 rotatable in unison with the rotation of the cam 11. A projection 20 which reciprocates registration pins 22 for engagement with and disengagement from the perforations g of the film f is fitted into an elongated slot 17a of the lever 17. A switching lever 14 is provided for displacement of the shaft 7 into a position where the shaft 7 is prevented from rotating even when the horizontal shaft 1 is rotated.

REFERENCES:
patent: 1851448 (1932-03-01), Ross
patent: 2594466 (1952-04-01), Luther
patent: 2788703 (1957-04-01), Holman
patent: 2953965 (1960-09-01), Stiffler
patent: 4053214 (1977-10-01), Brucat
patent: 4215921 (1980-08-01), Miller et al.
patent: 4402581 (1983-09-01), Bauer
patent: 4534630 (1985-08-01), Williamson
patent: 4697896 (1987-10-01), Fox
patent: 4863262 (1989-09-01), Berggren et al.
patent: 4892404 (1990-01-01), Blaschek
patent: 4896960 (1990-01-01), Williamson
patent: 5050985 (1991-09-01), Shaw et al.
patent: 5225860 (1993-07-01), Blaschek

Affiliated with

Also associated with

Rating

Sprocket wheel for advancing film and device for advancing film does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Sprocket wheel for advancing film and device for advancing film , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sprocket wheel for advancing film and device for advancing film will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1055387