Sensing device for magnetic core memories

Claim 1

A TEMPORARY MEMORY DEVICE COMPRISING: A MAGNETIC CORE HAVING A RECTANGULAR HYSTERESIS CHARACTERISTIC AND CAPABLE OF BEING SWITCH FROM ONE MAGNETIC REMANENT STATE TO ANOTHER; AN INTERROGATION WINDING INDUCTIVELY COUPLED TO SAID CORE TO EFFECT MAGNETIC STATE SWITCHING; CAPACITANCE MEANS CONNECTED TO SAID INTERROGATION WINDINGS; A SOURCE OF DIRECT CURRENT SERIALLY CONNECTED TO SAID CAPACITANCE MEANS AND TO SAID INTERROGATION WINDING TO CHARGE SAID CAPACITANCE MEANS VIA SAID INTERROGATION WINDING AND DRIVE SAID CORE IN THE DIRECTION OF A FIRST REMANENT STATE; MEANS COUPLED TO SAID CORE FOR COMPLEMENTING THE ACTION OF SAID INTERROGATION WINDING TO PLACE SAID CORE IN SAID FIRST REMANENT STATE; A SOURCE OF UNIPOLAR PULSES, AND AMPLIFIER SWITCH MEANS HAVING AN INPUT CONNECTED TO SAID PULSE SOURCE AND AN OUTPUT CONNECTED IN SHUNT RELATION BETWEEN SAID CAPACITANCE MEANS AND SAID SOURCE OF DIRECT CURRENT, SAID AMPLIFIER SWITCH MEANS BEING OPERATED IN RESPONSE TO A PULSE FROM SAID SOURCE AND SAID OUTPUT BEING EFFECTIVE DURING SAID PULSE TO DISCHARGE SAID CAPACITANCE MEANS VIA SAID INTERROGATION WINDING TO SWITCH SAID CORE TO A SECOND REMANENT STATE; AND A SENSE WINDING INDUCTIVELY COUPLED TO SAID CORE TO SENSE FLUX CHANGE THEREIN.