Thin film tape recorder

Claim 1

A MAGNETIC RECORDING SYSTEM, COMPRISING MEMORY MEANS CONSISTING OF A SLENDER CONDUCTOR COATED WITH FERROMAGNETIC THIN FILM HAVING AN ANISOTROPY, ERASING MEANS FOR ERASING THE EFFECT OF REMNANT MAGNETIZATION OF THE SLENDER MEMORY MEANS BEFORE RECORDING THEREON, INFORMATION APPLYING MEANS FOR MAGNETIZING THE MEMORY MEANS IN THE DIRECTION OF THE ANISOTROPY IN ACCORDANCE WITH THE MAGNITUDE OF AN INFORMATION SIGNAL WHICH IS LESS THAN THE MAGNITUDE TO GENERATE A MAGNETOMOTIVE FORCE EQUAL TO THE COERCIVE FORCE OF THE MAGNETIC MATERIAL, EXCITING MEANS FOR AUXILIARILY MAGNETIZING THE SLENDER MEMORY MEANS IN THE DIRECTION ORTHOGONAL TO THE DIRECTION OF THE ANISOTROPHY THEREBY REDUCING THE MAGNITUDE OF THE HYSTERESIS LOOP OF THE FERROMAGNETIC THIN FILM VIEWED FROM THE DIRECTION OF THE ANISTROPHY, THE INFORMATION APPLYING MEANS COMPRISING MEANS FURTHER APPLYING A BIAS MAGNETIC FIELD TO THE SLENDER MEMORY MEANS IN THE DIRECTION OF THE ANISOTROPHY, SAID BIAS MAGNETIC FIELD BEING OF A MAGNITUDE NOT TO SUBSTANTIALLY VARY THE REMNANT MAGNETIZATION OF THE MAGNETIC MATERIAL WITH RESPECT TO AN ORIGINAL POINT OF THE HYSTERESIS CURVE, MAGNETIZATIONS CAUSED BY THE INFORMATION APPLYING MEANS AND THE EXCITING MEANS BEING CAUSED TO INTERSECT AT SUBSTANTIALLY RIGHT ANGLES AT AN EXTREMELY SHORT PORTION OF THE SLENDER MEMORY MEANS, AND MEANS FOR MOVING THE SLENDER CONDUCTOR ALONG THE LONGITUDINAL DIRECTION THEREOF AT A SUBSTANTIALLY CONSTANT TRAVELING SPEED, THEREBY SHIFTING SAID INTERSECTING MAGNETIZATIONS ALONG THE LONGITUDINAL DIRECTION OF THE SLENDER MEMORY MEANS, WHEREBY THE INFORMATION SIGNAL IS MEMORIZED IN THE REMNANT STATE OF THE FERROMAGNETIC THIN FILM IN ACCORDANCE WITH SAID SHIFTING OF THE INTERSECTING MAGNETIZATIONS,AND THEN THE INFORMATION SIGNAL SO MEMORIZED IS NON-DESTRUCTIVELY DERIVED FROM THE SLENDER MEMORY MEANS WHEN THE EXCITING MEANS APPLIES AN APPROPRIATE MAGNETIC FIELD TO THE SLENDER MEMORY MEANS IN THE OPERATION OF SAID MEANS FOR MOVING THE SLENDER MEMORY MEANS.