Camera and/or projector drive mechanisms > With intermittently driven carrier-engaging sprocket > Special type gearing > Patents

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Class Information
Number: 352/190
Name: Optics: motion pictures > Camera and/or projector drive mechanisms > With intermittently driven carrier-engaging sprocket > Special type gearing
Description: Subject matter where the driving means includes a special gear pair which because of an irregular shape or toothing arrangement drives the sprocket in a nonuniform fashion with a uniform rotation of one of the gears of said pair.

Patents under this class:

Patent Number	Title Of Patent	Date Issued
5875020	Motion picture projection system	Feb. 23, 1999
5333020	Sprocket wheel for advancing film and device for advancing film using said sprocket wheel	Jul. 26, 1994
4222648	Film advance control mechanism	Sep. 16, 1980
4171881	Hand held motion picture viewer	Oct. 23, 1979
4134648	Motion picture camera	Jan. 16, 1979
4087165	Film tension absorbing system	May. 2, 1978
4057335	Film drive for motion picture apparatus	Nov. 8, 1977
3955887	Motion picture camera	May. 11, 1976
3947101	Mechanical drive arrangements	Mar. 30, 1976