Audio-visual projection device

Claim 1

An audiovisual projection device for reproducing synchronous sound and still and motion picture frames in sequence from the same strip of film, in combination a projection system having a light source and a continuously rEvolving shutter for interrupting the light source, a constant speed motor for continuously rotating the shaft mounting said shutter at 24 r.p.s., a strip of film for projection having multiple sequential frames arranged for motion picture sequence and still sequence as required, a two track magnetic tape having one track for the audio sequence and the other track for recorded predetermined signals for controlling the advancement of said film, separate electrically operated film claw advancing means comprising a film advancing claw pivotally mounted on a rotatable bellcrank and a control lever pivotally connecting said claw to electrical signals means, said control lever being moved in response to said recorded signals to pivot said film advancing claw about said bellcrank to engage and disengage said claw, said film advancing claw means being driven by said motor shaft for continuous rotation at the same time and speed as said shutter and eccentric cam means also mounted on said shaft for grounding out said relay means for 80* of one rotation thereby assuring the engagement or release of said claw means at the exact frame desired.