Magnetic head for recorder and reproducer

Claim 1

A MAGNETIC TRANSDUCER FOR USE WITH A MAGNETIC TAPE COMPRISING, IN COMBINATION, A RELATIVELY RIGID UNITARY FRAME, A BOBBIN OF INSULATING MATERIAL WITHIN SAID FRAME HAVING A CORE SPACE IN THE PLANE OF SAID FRAME AND A SURROUNDING WINDING SPACE; A PAIR OF GENERALLY C-SHAPED OPPOSITELY DISPOSED MAGNETIC CORE MEMBERS WITH ONE PAIR OF END PORTIONS EXTENDING INTO SAID CORE SPACE FROM OPPOSITE ENDS AND THE END SURFACES THEREOF IN INTIMATE JUXTAPOSITION, THE INTERMEDIATE PORTIONS EXTENDING ALONG OPPOSITE WALLS OF SAID FRAME, AND THE OTHER PAIR OF END PORTIONS EXTENDING OUTWARDLY OF SAID FRAME AND HAVING THEIR END SURFACES IN SPACED RELATION; A STRIP OF NON-MAGNETIC FOIL BETWEEN THE LAST MENTIONED END SURFACES, A WINDING ON SAID BOBBIN IN SAID WINDING SPACE, MEANS SPACING THE INTERMEDIATE PORTION OF ONE OF SAID C-SHAPED CORE MEMBERS FROM THE ADJACENT FRAME SIDE WALL; AND SCREW MEANS THREADED INTO THE OPPOSITE FROM SIDE WALL AND REACTING BETWEEN IT AND THE INTERMEDIATE PORTION OF THE OTHER C-SHAPED CORE MEMBER WITH A PREDETERMINED FORCE WHEREBY SAID FRAME IS TENSIONED, SAID CORE MEMBERS ARE COMPRESSED AND URGED TOWARD EACH OTHER, SAID END SURFACES OF SAID ONE PAIR OF END PORTIONS ARE HELD IN ENGAGEMENT UNDER PREDETERMINED PRESSURE, AID SAID END SURFACES OF SAID OTHER PAIR OF END PORTIONS ARE HELD IN ENGAGEMENT WITH OPPOSITE SIDES OF SAID STRIP OF NON-MAGNETIC FOIL UNDER PREDETERMINED PRESSURE.