Stereo tape control apparatus for a slide projector

Claim 1

IN AN AUDIO-VISUAL EDUCATIONAL SYSTEM, IN COMBINATION: PROJECTION APPARATUS FOR SLIDES, DRIVE MEANS FOR MOVING A SERIES OF SAID SLIDES IN SAID APPARATUS PAST A PROJECTING POSITION, A MULTIPLE TRACK TAPE HAVING CONTROL SIGNALS AND AUDIO MESSAGES IMPRESSED ON THE TRACKS CORRALATED WITH THE SLIDES, STEREO SOUND REPRODUCING MEANS INCLUDING A PLURALITY OF SOUND-ON-SOUND STEREO AUDIO AMPLIFIERES BEING CONNECTED IN CIRCUIT WITH THE RESPECTIVE OPERATING MAGNETIC HEAD OF THE MULTIPLE MAGNETIC HEADS IN A HEAD ASSEMBLY DISPOSED ON SAID TRACKS, AND A PLAY CONTROL MEANS BEING CONNECTED IN CIRCUIT WITH SAID SOUND-ONSOUND STEREO AUDIO AMPLIFIERS AND WITH THE RESPECTIVE OPERATING MAGNETIC HEAD IN SAID HEAD ASSEMBLY FOR APPLYING SAID MESSAGES FROM THE RESPECTIVE OPERATING TRACK ON SAID MULTIPLE TRACK TAPE TO THE STEREO SOUND REPRODUCING MEANS AND FOR SIMULTANEOUSLY APPLYING SAID CONTROL SIGNALS FROM SAID TRACK TO THE DRIVE MEANS TO MOVE THE SLIDES IN SAID PROJECTION APPARATUS IN COORDINATION WITH THE MESSAGES REPRODUCED BY THE STEREO SOUND REPRODUCING MEANS.