Circuit arrangement for starting a self-generating thyristor oscillator

Claim 1

A CIRCUIT ARRANGEMENT FOR STARTING A SELF-GENERATING THYRITOR OSCILLATOR INCLUDING AT LEAST ONE THYRISTOR HAVING CATHODE, ANODE AND CONTROL ELECTRODES, A CONTROL CIRCUIT COUPLED TO SAID CATHODE AND CONTROL ELECTRODES AND AN OUTPUT CIRCUIT COUPLED TO SAID CATHODE AND ANODE ELECTRODES, SAID ARRANGEMENT COMPRISING A DIRECT VOLTAGE SOURCE, A CAPACITOR AND A RESISTOR CONNECTED IN SERIES WITH EACH OTHER ACROSS SAID VOLTAGE SOURCE, A DIRECT-CURRENT CONDUCTIVE IMPEDANCE AND A NON-LINEAR ELEMENT HAVING A THREDHOLD VOLTAGE CONNECTED IN SERIES WITH EACH OTHER ACROSS SAID CAPACITOR, SAID NON-LINEAR ELEMENT BECOMING CONDUCTIVE WHEN THE VOLTAGE ACROSS THE CAPACITOR REACHES A GIVEN VALUE AND PRODUCING A STARTING PULSE ACROSS SAID IMPEDANCE WHEN THE VOLTAGE SET UP ACROSS SAID CAPACITOR BY SAID DIRECT VOLTAGE SOURCE REACHES THE VALUE OF SAID THRESHOLD VOLTAGE, A CIRCUIT INTERCOUPLING SAID DIRECT-CURRENT CONDUCTIVE IMPEDANCE AND SAID CONTROL CIRCUIT OF SAID THYRISTOR FOR FEEDING SAID STARTING PULSE THERETO, AND A RECTIFIER CONNECTED BETWEEN A POINT AT VARYING POTENTIAL OF SAID OUTPUT CIRCUIT AND THE JUNCTION POINT OF SAID CAPACITOR AND SAID RESISTOR, SAID RECTIFIER HAVING A POLARITY SUCH THAT OSCILLATIONS SET UP IN SAID OUTPUT CIRCUIT CHARGE SAID CAPACITOR WITH A VOLTAGE HAVING A POLARITY OPPOSITE TO THAT OF THE VOLTAGE SET UP ACROSS SAID CAPACITOR BY SAID DIRECT VOLTAGE SOURCE, WHEREBY THE RESULTING VOLTAGE ACROSS SAID CAPACITOR REMAINS LOWER THAN SAID THRESHOLD VOLTAGE WHEN THE OSCILLATOR IS GENERATING.