Apparatus for duplicating magnetic recordings

Claim 1

IN A SYSTEM FOR RECORDING FROM MASTER PROGRAM SOURCES, THE COMBINATION OF A FIRST AND A SECOND MASTER MAGNETIC STRIP SOUND RECORD PROGRAM SOURCES HAVING A PRIMARY SYNCHRONIZATION SIGNAL MEANS AT THE END OF EACH SOUND RECORD, SAID PROGRAM SOURCES BEING DRIVEN DURING REPRODUCTION THEREOF AT A CONSTANT LINEAR SPEED WHICH IS A PREDETERMINED MULTIPLE OF THE ORIGINAL RECORDING SPEED, ONLY ONE OF SAID SOURCES BEING REPRODUCED AT A GIVEN TIME; A MAGNETIC PICKUP HEAD ASSOCIATED WITH EACH OF THE SAID SOURCES AND CONNECTED WITH MEANS FOR AMPLIFYING THE PROGRAM SIGNALS; A PLURALITY OF MAGNETIC RECORDING MEANS CONNECTED WITH THE OUTPUT OF THE SAID AMPLIFIER FOR RECORDING SAID SIGNALS UPON EACH OF A PLURALITY OF MAGNETIC COPY STRIPS; THE SAID COPY STRIPS BEING OF A LENGTH GREAT ENOUGH TO ACCOMMODATE MULTIPLE PROGRAMS OF THE DURATION OF THE SOURCES, AND BEING DRIVEN AT THE SAME PREDETERMINED MULTIPLE OF THE PREDETERMINED PLAYBACK SPEED AS THE PROGRAM SOURCES; SENSING MEANS ASSOCIATED WITH THE SAID PROGRAM SOURCES TO DETECT THE PRIMARY SYNCHRONIZING SIGNAL AND IN RESPONSE THERETO SUBSTANTIALLY SIMULTANEOUSLY INITIATE THE IMPRESSION OF A SECONDARY SYNCHRONIZATION SIGNAL UPON THE COPY STRIPS, STOP THE FORWARD RUNNING AND REPRODUCTION OF THE FIRST PROGRAM SOURCE, INITIATE REWINDING THEREOF, AND START THE FORWARD RUNNING REPRODUCTION OF THE SECOND PROGRAM SOURCE; AND ADAPTED TO REPEAT THE SAID SIMULTANEOUS OPERATIONS UPON SENSING OF THE PRIMARY SYNCHRONIZING SIGNAL OF THE SECOND PROGRAM SOURCE, TO INITIATE REPRODUCTION OF THE FIRST PROGRAM SOURCE.