Pulse group generating and shaping circuit

Claim 1

A SELF-QUENCHING, SELF-TRIGGERING BLOCKING OSCILLATOR FOR PROVIDING SPACED TRAINS OF PULSES OF AT LEAST TWO PULSES EACH TO BE APPLIED TO A USER CIRCUIT HAVING A PRINCIPALLY RESISTIVE, AND SHORT TIME CONSTANT, INPUT IMPEDANCE COMPRISING: (I) A BLOCKING OSCILLATOR TRANSFORMER HAVING: (A) AN INPUT WINDING, (B) A FEEDBACK WINDING, AND (C) AN OUTPUT WINDING ADAPTED TO FEED SAID USER CIRCUIT, EACH OF SAID WINDINGS HAVING FIRST AND SECOND ENDS, THE SAID SECOND ENDS BEING JOINED TOGETHER, (II) A TRANSISTOR HAVING; (A) AN EMITTER ELECTRODE, (B) A COLLECTOR ELECTRODE, AND (C) A BASE ELECTRODE, SAID COLLECTOR ELECTRODE BEING CONNECTED TO THE SAID FIRST END OF THE SAID INPUT WINDING, (III) A BLOCKING CAPACITOR CONNECTED TO SAID FIRST END OF SAID FEEDBACK WINDING AND TO SAID BASE ELECTRODE, (IV) A FIRST DISCHARGE RESISTOR CONNECTED TO SAID BASE ELECTRODE AND TO SAID SECOND ENDS OF THE SAID TRANSFORMER WINDINGS, (V) A PULSE-SHAPING CAPACITOR CONNECTED IN SERIES WITH THE FIRST END OF THE SAID OUTPUT WINDING AND THE SAID INPUT IMPEDANCE OF THE USER CIRCUIT, (VI) A SECOND DISCHARGE RESISTOR HAVING ONE END THEREOF CONNECTED TO THE JUNCTION OF SAID INPUT IMPEDANCE AND SAID PULSE-SHAPING CAPACITOR AND THE OTHER END THEREOF CONNECTED IN A MANNER TO DISCHARGE SAID PULSE-SHAPING CAPACITOR RAPIDLY WHEN DISCHARGING CURRENT FLOWS INTO SAID USER CIRCUIT, (VII) A VOLTAGE SOURCE, ONE POLE OF WHICH IS CONNECTED TO THE SAID SECOND ENDS OF SAID TRANSFORMER WINDINGS, AND (VIII) A RESISTANCE CHOKE CONNECTED BETWEEN SAID TRANSISTOR EMITTER ELECTRODE AND THE OTHER POLE OF SAID VOLTAGE SOURCE, SAID BLOCKING CAPACITOR BEING SUCH AS TO CAUSE SAID OSCILLATOR TO BLOCK AFTER GENERATING A PULSE TRAIN DUE TO THE ACCUMULATED CHARGE ON SAID BLOCKING CAPACITOR; SAID FIRST DISCHARGE RESISTOR BEING SUCH AS TO PROVIDE A DISCHARGE PATH FOR SAID BLOCKING CAPACITOR WHEN SAID OSCILLATOR IS BLOCKED BY SAID ACCUMULATED CHARGE, THE VALUES OF SAID BLOCKING CAPACITOR AND SAID DISCHARGE RESISTOR BEING SUCH THAT THE TIME CONSTANT OF SAID DISCHARGE PATH IS LONG COMPARED TO THE TIME CONSTANT OF THE CHARGING PATH OF SAID BLOCKING CAPACITOR WHEN RECEIVING SAID CHARGE; SAID PULSE-SHAPING CAPACITOR HAVING SUCH A VALUE AS TO CAUSE SAID PULSE-SHAPING CAPACITOR TO CHARGE RAPIDLY WHEN A CHARGING CURRENT FLOWS INTO SAID USER CIRCUIT; SAID SECOND DISCHARGE RESISTOR BEING SUCH AS TO DISCHARGE SAID PULSESHAPING CAPACITOR RAPIDLY WHEN DISCHARGING CURRENT FLOWS INTO SAID USER CIRCUIT.