Polarized magnetic recording

Claim 1

A TRANSDUCER FOR MAGNETIC RECORDING OF INTELLIGENCE SIGNALS ON A MOVABLE MAGNETIC RECORD MEDIUM SPACED FROM SAID TRANSDUCER, SAID TRANSDUCER COMPRISING: A FIRST, WIDE-GAPPED MAGNETIC CORE MEANS IN A PLANE TRANSVERSELY PERPENDICULAR TO THE SURFACE OF SAID MOVABLE MAGNETIC RECORD MEDIUM, A FIRST COIL WOUND ABOUT SAID FIRST CORE AND ADAPTED TO GENERATE A REGULARLY FLUCTUATING UNIDIRECTIONAL POLARIZING FIELD OF A FREQUENCY AT LEAST SEVERAL TIMES THAT OF THE HIGHEST FREQUENCY OF THE INTELLIGENCE SIGNALS TO BE RECORDED AND HAVING A STEEP INTENSITY GRADIENT IN THE DIRECTION OF RELATIVE MOVEMENT OF SAID MEDIUM, TO DEFINE A RECORDING LINE IN RESPONSE TO SIGNALS APPLIED TO SAID FIRST COIL FROM AN EXTERNAL SOURCE; A SECOND MAGNETIC CORE MEANS DISPOSED IN A PLANE PERPENDICULAR TO THE PLANE OF SAID FIRST MAGNETIC CORE MEANS WITHIN THE WIDE GAP THEREOF AND PARALLEL WITH THE DIRECTION OF MOTION OF SAID MOVABLE MAGNETIC RECORD MEDIUM, SAID SECOND MAGNETIC CORE MEANS HAVING A NARROW GAP PARALLEL WITH AND ADJACENT AN OUTER EDGE OF SAID FIRST MAGNETIC CORE; AND A SECOND COIL WOUND ABOUT SAID SECOND MAGNETIC CORE AND ADAPTED TO GENERATE A FLUCTUATING INTELLIGENCE SIGNAL FIELD ACROSS SAID NARROW GAP IN ACCORDANCE WITH INTELLIGENCE SIGNALS APPLIED THERETO FROM AN EXTERNAL SOURCE, SAID INTELLIGENCE SIGNAL FIELD INTERACTING WITH SAID POLARIZING FIELD ON SAID MAGNETIC RECORD MEDIUM TO VARY SAID RECORDING LINE IN ACCORDANCE WITH SAID INTELLIGENCE SIGNAL.