Current switching through an inductive impedance

Claim 1

A SWITCHING CIRCUIT ARRANGEMENT FOR A MAGNETIC MEMORY CORE, COMPRISING A CLOSED CORE COMPOSED OF FERROMAGNETIC MATERIAL HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS LOOP, AN INPUT WINDING COUPLED TO SAID CORE, AN OUTPUT WINDING COUPLED TO SAID CORE, A PAIR OF JUNCTION TYPE TRANSISTORS OF OPPOSITE CONDUCTIVITY TYPE EACH HAVING AN EMITTER ELECTRODE, A BASE ELECTRODE AND A COLLECTOR ELECTRODE, A SOURCE OF VOLTAGE SUPPLY, MEANS COUPLING THE EMITTER ELECTRODES OF SAID TRANSISTORS THROUGH SAID VOLTAGE SUPPLY SOURCE, MEANS COUPLING SAID BASE ELECTRODES, MEANS CONNECTING SAID COLLECTOR ELECTRODES, MEANS FOR SUPPLYING A SWITCHING PULSE TO SAID BASE COUPLING MEANS FOR SWITCHING OVER SAID CORE FROM ONE REMANENT CONDITION TO ANOTHER, A RESISTOR CONNECTED IN SERIES CIRCUIT ARRANGEMENT WITH SAID INPUT WINDING, AND MEANS COUPLING SAID SERIES CIRCUIT ARRANGEMENT BETWEEN SAID COLLECTOR CONNECTING MEANS AND SAID VOLTAGE SUPPLY SOURCE, SAID RESISTOR HAVING A RESISTANCE VALUE OF SUFFICIENT MAGNITUDE SUCH THAT THE POTENTIAL DIFFERENCE BETWEEN THE EMITTER AND COLLECTOR ELECTRODES OF EACH OF SAID TRANSISTORS IS SMALL RELATIVE TO THE VOLTAGE DROP ACROSS SAID RESISTOR WHEN A SWITCHING PULSE IS SUPPLIED TO SAID BASE COUPLING MEANS AND THE POWER DELIVERED TO SAID INDUCTIVE IMPEDANCE AND SAID RESISTOR SUBSTANTIALLY EXCEEDS THE MAXIMUM PERMISSIBLE POWER DISSIPATED IN SAID TRANSISTORS.