Continuous motion picture projector apparatus

Optics: motion pictures – With sound accompaniment – Common picture and sound record carrier systems

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Details

352125, 352198, 352 83, G03B 3102

Patent

active

039375676

ABSTRACT:
A continuous motion picture projection apparatus for use with a film strip having two side by side data tracks each comprising a photographic image track and a synchronized sound track. The first half of the program is carried by one data track and the other half by the second data track. The apparatus includes a main drive assembly which moves the film strip through the unit alternately in a forward and reverse direction and further comprises an illumination system, a projection lens system and a sound track sensor system. These systems are movable between a first position in alignment with the first data track and a second position in alignment with the second data track. Mechanisms associated with each of the systems are operably coupled with the main drive assembly and serve to automatically move the systems between their first and second positions upon reversal of the drive assembly. A reversing mechanism is provided to sense a specific location near either end of the film strip and thereupon to reverse the drive assembly. Reversal of the drive assembly reverses the direction of travel of the film strip and simultaneously causes the illumination, projection lens and sound track sensor systems to be moved into alignment with the second data track. By alternately running the film strip first in one direction and then in the other, the program can be continuously repeated.

REFERENCES:
patent: 1419759 (1922-06-01), Reid
patent: 3476469 (1969-11-01), Wells
patent: 3482907 (1969-12-01), Michelson
patent: 3492066 (1970-01-01), Michelson
patent: 3639045 (1972-02-01), Haefeli

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