Circuit for producing short rise time current pulses in inductive loads

Claim 1

IN A CIRCUIT FOR PRODUCING CURRENT PULSES HAVING A SHORT RISE AND FALL TIME IN INDUCTIVE LOADS, A SOURCE HAVING A POTENTIAL E WITH RESPECT TO GROUND, A TWO CONTACTS SWITCH ONE OF WHOSE CONTACTS IS CONNECTED TO SAID POTENTIAL E, AN INDUCTIVE LOAD ONE SIDE OF WHICH IS GROUNDED, A FIRST FORWARDLY POLED DIODE INTERCONNECTING THE OTHER CONTACT OF SAID SWITCH AND THE OTHER SIDE OF SAID LOAD, A STEP-UP TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING AND A TURNS RATIO N, A SECOND FORWARDLY POLED DIODE INTERCONNECTING ONE SIDE OF SAID SECONDARY AND SAID OTHER SIDE OF SAID LOAD, MEANS CONNECTING THE OTHER SIDE OF SAID SECONDARY TO GROUND, A CONDENSER CONNECTED BETWEEN GROUND AND ONE SIDE OF SAID PRIMARY, A RESISTOR CONNECTED BETWEEN THE OTHER SIDE OF SAID PRIMARY AND SAID SECOND CONTACT OF SAID SWITCH FOR CONTROLLING THE PEAK CURRENT PRODUCED IN SAID LOAD BY THE SECONDARY AS SAID SWITCH IS CLOSED, A TRANSFORMER HAVING A WINDING INTERCONNECTED BETWEEN SAID FIRST DIODE AND SAID SWITCH, MEANS RESPONSIVE TO THE OPENING OF SAID SWITCH FOR DISCHARGING SAID CONDENSER THROUGH A SECOND WINDING OF SAID LAST NAMED TRANSFORMER, AND MEANS RESPONSIVE TO SAID DISCHARGE WHEREBY SAID LAST NAMED TRANSFORMER GENERATES A POTENTIAL IN OPPOSITION TO THE SELF-INDUCED POTENTIAL OF THE LOAD TO MINIMIZE THE RESULTANT POTENTIAL ACROSS THE SWITCH CONTACTS.