Accession Number : ADD004578

Title :   Sealed Cassette for Optical Sound Projection.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE ARMY WASHINGTON D C

Personal Author(s) : Everett,Seth Leroy , Jr

Report Date : 01 Feb 1977

Pagination or Media Count : 12

Abstract : A film projector system including a sealed film cassette removably mounted within an aperture in the projector and driving means in said projector mechanically engaging coupling means extending through said cassette for driving the sealed film between hubs sealed in said cassette intermittently past a film projection location gate in said cassette and continuously past a sound detection location therein, with the projection plane of the film at said projector locations being disposed normal to the projector optical projection optical sound beams and twisted ninety degrees with respect to the plane of that portion of the film wound on said hubs so that the projector beams do not pass between the film hubs.

Descriptors :   *Patents, *Sound motion picture projectors, *Motion picture film, *Cassettes, Sealed systems, Variable speed drives, Hubs, Stepper motors, Film transport systems

Subject Categories : Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE