Spin resonant transducer

Claim 1

A RECORDING HEAD FOR RECORDING A MICROWAVE FREQUENCY RADIO BEAM COMPRISING: A RECTANGULAR WAVEGUIDE SECTION FOR RECEIVING THE ELECTROMAGNETIC BEAM, A RECORDING HEAD MEMBER BEING CONNECTED TO THE WAVEGUIDE SECTION AND HAVING A NARROW INTERNAL PASSAGEWAY EXTENDING THROUGH THE HEAD FROM AN INLET TO AN OUTLET FOR RECEIVING A CONTINUOUS RECORDING TAPE, SAID HEAD MEMBER BEING FORMED WITH AN OPENING IN SAID PASSAGEWAY LEADING INTO THE WAVEGUIDE SECTION, THEREBY TO EXPOSE THE TAPE TO THE MICROWAVE BEAM WITHIN THE WAVEGUIDE, AND SAID HEAD MEMBER BEING PROVIDED WITH A GUIDE MEANS ADJACENT SAID OPENING FOR GUIDING THE TAPE AT THE SAME POSITION THROUGH SAID OPENING, THE INTERNAL PASSAGEWAY PROVIDED IN SAID RECORDING HEAD MEMBER BEING SUFFICIENTLY NARROW AT THE FREQUENCY BAND OF THE BEAM TO PREVENT THE PROPAGATION OF THE BEAM THERETHROUGH FROM THE WAVEGUIDE, WHEREBY SAID HEAD MEMBER TERMINATES THE WAVEGUIDE AND PROVIDES A SHORT CIRCUIT FOR THE BEAM AT THE PORTION IN SAID PASSAGEWAY OPENING IN THE WAVEGUIDE, WHEREBY AT SAID OPENING THERE IS PROVIDED A MINIMIZED ELECTRIC FIELD VECTOR AND A MAXIMUM MAGNETIC FIELD VECTOR FOR APPLICATION TO THE RECORDING TAPE, AND MAGNETIC MEANS FOR DIRECTING A LOW FREQUENCY MAGNETIC FIELD INTO THE HEAD MEMBER AT THE POSITION OF THE OPENING OF THE PASSAGEWAY INTO THE WAVEGUIDE.