Audio-video system employing sound track tape belts movably mounted on projection slides

Abstract

Abstract THE SYSTEM SHOWN INCLUDES A SLIDE PROJECTOR WITH A SLIDE CHANGER, AND A MAGNETIC TAPE RECORD ASSOCIATED WITH ELECTRONIC APPARATUS AKIN TO A TAP RECORDER INCLUDING A MAGNETIC PICK-UP HEAD, ALL DEALING WITH PROJECTION SLIDES ON WHICH THE TAPE, AN ENDLESS BELT, IS MOVABLY MOUNTED. THE BELT, ARRANGED IN SQUARE FORMATION AROUND THE TRANSPARENCY, IS FLATTENED SO ITS FOUR FLIGHTS ARE PARALLEL TO THE GENERAL PLANE OF THE SLIDE, THERE BEING A 45 DEGREE FOLD LINE IN THE BELT ACROSS EACH CORNER WHERE IT IS SUPPORTED ON EDGES ON THE SLIDE BODY, THE SOUND TRACK IS ALONG A LINE ONCE AROUND ONE FACE OF THE BELT WITH A CONDUCTIVE SPOT BETWEEN START AND FINISH. OPPOSITE CUT-OUTS IN THE SLIDE EXPOSE BOTH BELT SURFACES. THE MAGNETIC HEAD IS ONE JAW OF A NORMALLY OPEN CLAMP FORM WHILE POWERED FRICTION DRIVE WHEEL IS THE OTHER JAW. THE CLAMP IS CLOSED UPON ACTUATION OF A SOLENOID, WHEREUPON SAID MAGNETIC HEAD AND ROTATING WHEEL ENTER THE CUT-OUTS TO PINCH THE TAPE, THUS CAUSING IT TO MOVE AND ITS TRACK PLAYED. CONDUCTIVE SPRING FINGERS ON TTHE CLAMP ARMS ALSO PINCH THE TAPE UPON THE CLOSING OF THE CLAMP, AND MAKING CONTACT WITH SAID SPOT, CONSTITUTE A SWITCH IN A CIRCUIT INCLUDING SAID SOLENOID AND A LOCKING RELAY DEVICE, OPERATING AUTOMATICALLY TO CAUSE THE CLAMP TO OPEN WHEN PLAYING IS DONE.

Inventors

• 👤 Sam Larkin

Bibliographic Details