Silicon controlled rectifier chopper circuit

Claim 1

A CHOPPER CIRCUIT COMPRISING A SOURCE OF DIRECT CURRENT, A LOAD, A SILICON CONTROLLED RECTIFIER HAVING CATHODE, ANODE AND GATE ELECTRODES, MEANS FOR APPLYING A PULSE TO SAID GATE ELECTRODE TO TURN ON SAID SILICON CONTROLLED RECTIFIER, SAID CATHODE AND ANODE ELECTRODES BEING CONNECTED IN SERIES CIRCUIT WITH SAID SOURCE OF DIRECT CURRENT AND SAID LOAD, A CAPACITOR, AND AN OSCILLATOR HAVING AN IMPEDANCE ELEMENT ACROSS WHICH A VOLTAGE PULSE IS PRODUCED UPON EACH CYCLE OF THE OSCILLATOR, SAID CAPACITOR BEING CONNECTED IN SERIES WITH SAID IMPEDANCE ELEMENT IN SHUNT ACROSS SAID LOAD, SAID CAPACITOR CHARGING THROUGH SAID IMPEDANCE ELEMENT TOWARD THE POTENTIAL DEVELOPED ACROSS SAID LOAD WHEN SAID SILICON CONTROLLED RECTIFIER IS TURNED ON, SAID VOLTAGE PULSE ADDING TO THE CHARGE OF SAID CAPACITOR TO REVERSE-BIAS THE CATHODE AND ANODE ELECTRODES OF SAID SILICON CONTROLLED RECTIFIER THEREBY TO TURN OFF SAID SILICON CONTROLLED RECTIFIER.