3-D motion picture projector

Details 3-D motion picture projector 3-D motion picture projector

1989-09-08

1990-10-30

Hayes, Monroe H.

Optics: motion pictures

Stereoscopic cameras and/or projectors

Plural film strip

352184, G03B 3500

Patent

active

049664549

ABSTRACT:
A 3-D motion picture projector comprises two rolling loop film transport mechanisms arranged in vertically superposed relationship with the pricipal components of the two mechanisms in vertical alignment with one another. Each film transport mechanism includes a cam unit for decelerating the film as it approaches the aperture for projection. The two cam units are driven from a common vertical drive shaft by toothed belt drives. The lower cam unit is mounted on an arm so that it can be swung out to an inoperative position for maintenance and service. The belt drives maintain the drive coupling at this time and automatically restore proper cam timing when the cam unit is returned to its operative position.

REFERENCES:
patent: 3600073 (1971-08-01), Shaw
patent: 4114996 (1978-09-01), Shaw
patent: 4441796 (1984-04-01), Shaw
"Future Cinema", Perforations, vol. 4, No. 3, 1984, p. 34 by Collin Low.
"Large Screen 3-D--Aesthetic and Technical Considerations", by Colin Low, Perforations, vol. 3, No. 4, 7-1983, p. 44.
"3-D Imax Camera Assembly", by Len Green, Perforations, vol. 4, No. 4, 1984.
"3-D Imax Progress Report", by Marcel Malacket Perforations, vol. 4, No. 4, 1984.

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