Slide projection and sound reproduction system

Claim 1

The combination of a slide projector and a sound reproduction system, said slide projector having movable storage means for storing a sequence of slides, means for projecting said slides in a forward or reverse sequence and transport means for effecting respectively forward and reverse movement of said storage means, and said sound reproduction system incorporating magnetic tape and a pilot head adapted to emit control pulses at a variable frequency for slide changing purposes the provision of: a. first switch means for effecting operation of the transport means, b. drive means for periodically controlling said first switch means to effect operation of said transport means when the drive means is energized, c. a second switch for normally energizing said drive means, d. positionable means normally located at a position to render said second switch inoperative to energize the drive means, e. movable means supporting said second switch, f. control means responsive to said control pulses for moving the second switch supporting means to move the second switch away from said position a predetermined distance for each received pulse to energize said drive means while it is removed from said position, g. and means operated by the drive means for returning the positionable means to said position to render the second switch inoperative to energize the drive means.