Magnetic recording and reproduction stabilizing system

Claim 1

A MAGNETIC RECORDING AND REPRODUCING STABILIZING SYSTEM COMPRISING A SUPPLY REEL ON WHICH IS WOUND A MAGNETIC TAPE; A REEL MOTOR CONNECTED TO SAID SUPPLY REEL; A GUIDE DRUM PROVIDED ROTATABLY WITH AT LEAST ONE MAGNETIC HEAD TO RECORD AND REPRODUCE ON THE MAGNETIC TAPE ONE FIELD OR ONE FRAME OF TELEVISION VIDEO SIGNAL AS A UNIT AND HAVING A SURFACE ON WHICH THE MAGNETIC TAPE IS GUIDED FOR A COMPARATIVELY LONG SECTION; A VACUUM CONTROLLER PROVIDED SO AS TO BE IN CONTACT WITH THE MAGNETIC TAPE BETWEEN SAID GUIDE DRUM AND SAID SUPPLY REEL, TO SUCK THE MAGNETIC TAPE AND TO APPLY A BRAKING FORCE IN THE LONGITUDINAL DIRECTION OF THE TAPE OT SAID TAPE AT LEAST ONE SAID GUIDE DRUM; MEANS FOR CONTROLLING THE SUCTION PRESSURE OF SAID VACUUM CONTROLLER TO GIVE AN EXPANSION AND A CONTRACTION TO SAID MAGNETIC TAPE SO THAT LENGTH OF RECORDED TRACKS AT REPRODUCTON IS MADE TO THE SAME WITH THAT OF THE CASE OF RECORDING; MEANS FOR DETECTING LOOSENESS OF THE MAGNETIC TAPE BETWEEN SAID VACUUM CONTROLLER AND SAID SUPPLY REEL; MEANS FOR GIVING A PREDETERMINED SLIGHT SLACK TO THE MAGNETIC TAPE BETWEEN SAID VACUUM CONTROLLER AND SAID SUPPLY REEL BY CONTROLLING ROTATION OF SAID REEL MOTOR IN ACCORDANCE WITH VARIATION OF LOOSENESS OF THE MAGNETIC TAPE AS DETECTED BY SAID MEANS FOR DETECTING; A CAPSTAN AND A PINCH ROLLER PROVIDED ON THE SIDE OF THE MAGNETIC TAPE FED OUT OF SAID GUIDE DRUM; AND A TAKE-UP REEL ON WHICH THE MAGNETIC TAPE FROM SAID SUPPLY REEL IS WOUND UP WHILE IN CONTACT WITH SAID VACUUM CONTROLLER, GUIDE DRUM, MAGNETIC HEADS IN SAID GUIDE DRUM AND CAPSTAN AND PINCH ROLLER.