Transducer system and method

Claim 1

A RECORDING HEAD COMPRISING MAGNETIC CORE MEANS HAVING A MAGNETIC SIGNAL FLUX PATH INCLUDING A RECORDING GAP FOR COUPLING WITH A MAGNETIC RECORD MEDIUM AND INCLUDING VARIABLE RELUCTANCE PORTIONS OF MAGNETIC MATERIAL, SIGNAL COUPLING MEANS COUPLED TO SAID MAGNETIC SIGNAL FLUX PATH, MEANS WHEREBY SAID SIGNAL COUPLING MEANS PRODUCES A SIGNAL FLUX IN SAID MAGNETIC SIGNAL FLUX PATH WHICH IS INEFFECTIVE BY ITSELF TO PERMANENTLY SUBSTANTIALLY AFFECT A MAGNETIC RECORD MEDIUM AT SAID RECORDING GAP, EXCITATION COUPLING MEANS COUPLED TO SAID VARIABLE RELUCTANCE PORTIONS, MEANS FOR DELIVERING CURRENT PULSES TO SAID EXCITATION COUPLING MEANS TO GENERATE EXCITING FLUXES IN THE RESPECTIVE VARIABLE RELUCTANCE PORTIONS WHICH ARE OPPOSED WITH RESPECT TO SAID MAGNETIC SIGNAL FLUX PATH AND SUBSTANTIALLY BALANCED AT SAID GAP TO PRODUCE A NET MAGNETIC FLUX AT SAID GAP WHICH IS INEFFECTIVE BY ITSELF TO SUBSTANTIALLY PERMANENTLY AFFECT A MAGNETIC RECORD MEDIUM AT SAID GAP, MEANS WHEREBY SAID VARIABLE RELUCTANCE PORTIONS ARE MAINTAINED IN A MAGNETIC CONDITION SUBSTANTIALLY BELOW SATURATION AND ARE PERIODICALLY SHIFTED BY SAID MAGNETIC EXCITING FLUXES TO NET MAGNETIC FLUX DENSITIES OF RESPECTIVE OPPOSITE POLARITY WITH RESPECT TO SAID MAGNETIC SIGNAL FLUX PATH, AND MEANS WHEREBY A SIGNAL FLUX FROM THE SIGNAL COUPLING MEANS IS EFFECTIVE TO UNBALANCE SAID OPPOSED MAGNETIC EXCITING FLUXES AND TO PRODUCE A RECORDING ON SAID RECORD MEDIUM IN ACCORDANCE WITH SAID SIGNAL FLUX.