Transducer for magnetically recorded signals

Claim 1

A TRANSDUCER HEAD FOR PROVIDING A TRANSDUCING ACTION WITH A MAGNETIC MEDIUM MOVABLE IN A FIRST DIRECTION, INCLUDING, A HOLLOW CYLINDER OF CONDUCTIVE FERROMAGNETIC MATERIAL DISPOSED IN A SECOND DIRECTION TRANSVERSE TO THE FIRST DIRECTION AND HAVING A NON-MAGNETIC GAP WHICH IS SUBSTANTIALLY PARALLEL TO THE AXIS OF THE CYLINDER AND IN CONTIGUOUS RELATIONSHIP TO THE MEDIUM FOR A PASSAGE OF FLUX IN AN ANNULAR DIRECTION AROUND THE CYLINDER AND IN THE FIRST DIRECTION ACROSS THE GAP AND FOR A LINKAGE OF FLUX BETWEEN THE MEDIUM AND THE CYLINDER, AND A SIGNAL CIRCUIT COMPRISING A PORTION OF A CONDUCTIVE LOOP AND A PORTION OF THE CYLINDER, THE CONDUCTIVE LOOP BEING ELECTRICALLY CONNECTED DIRECTLY TO SAID CYLINDER AT POINTS SPACED AXIALLY THEREALONG FOR A PASSAGE OF CURRENT IN THE AXIAL DIRECTION THROUGH THE CYLINDER AND A TRANSDUCING ACTION BETWEEN THE PASSAGE OF CURRENT IN THE AXIAL DIRECTION THROUGH THE CYLINDER AND THE PASSAGE OF FLUX IN THE FIRST DIRECTION THROUGH THE GAP.