Phase-controlling circuitry

Claim 1

IN A D-C TO A-C CONVERTER, IN COMBINATION, FIRST AND SECOND TRANSISTORS EACH HAVING EMITTER, BASE AND COLLECTOR ELECTRODES, A PAIR OF POWER INPUT TERMINALS ADAPTED TO BE CONNECTED TO A POLED D-C SOURCE, FIRST AND SECOND LOAD RESISTORS CONNECTED BETWEEN ONE OF SAID POWER TERMINALS AND THE COLLECTOR ELECTRODES OF SAID FIRST AND SECOND TRANSISTORS, RESPECTIVELY, A BIAS RESISTOR, MEANS FOR COMMONLY CONNECTING THE EMITTER ELECTRODES OF SAID FIRST AND SECOND TRANSISTORS TO THE OTHER AND SAID POWER TERMINALS THROUGH SAID BIAS RESISTOR, A FIRST SWITCHING CONTROL RESISTOR CONNECTED BETWEEN SAID COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR AND SAID BASE ELECTRODE OF SAID SECOND TRANSISTOR, A FIRST SWITCHING CONTROL CAPACITOR CONNECTED IN PARALLEL WITH SAID FIRST SWITCHING CONTROL RESISTOR, A SECOND SWITCHING CONTROL RESISTOR CONNECTED BETWEEN SAID COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR AND SAID BASE ELECTRODE OF SAID FIRST TRANSISTOR, A SECOND SWITCHING CONTROL CAPACITOR CONNECTED IN PARALLEL WITH SAID SECOND SWITCHING CONTROL RESISTOR, A TANK CIRCUIT INCLUDING A TUNING INDUCTOR HAVING A TUNING CAPACITOR CONNECTED THEREACROSS, SAID TANK CIRCUIT BEING PROVIDED WITH OUTPUT TERMINALS ADAPTED TO BE CONNECTED TO A LOAD, MEANS FOR CONNECTING THE COLLECTOR ELECTRODE OF SAID FIRST TRANSISTOR TO SAID TANK CIRCUIT, MEANS FOR CONNECTING THE COLLECTOR ELECTRODE OF SAID SECOND TRANSISTOR TO SAID TANK CIRCUIT, A TIMING PULSE SOURCE, MEANS FOR SIMULTANEOULSY SUPPLYING TIMING PULSES FROM SAID TIMING PULSE SOURCE TO SAID FIRST AND SECOND TRANSISTORS WHEREBY SAID TRANSISTORS INTERCHANGE CONDUCTING STATES IN RESPONSE TO EACH OF SAID TIMING PULSES, VARIABLE CONDUCTING MEANS HAVING FIRST AND SECOND POWER ELECTRODES AND A CONTROL ELECTRODE, MEANS FOR CONNECTING SAID POWER ELECTRODES OF SAID VARIABLE CONDUCTING MEANS BETWEEN SAID EMITTER AND SAID COLLECTOR ELECTRODES OF SAID FIRST TRANSISTOR, A PHASING TERMINALS, MEANS FOR CONNECTING SAID CONTROL ELECTRODE OF SAID VARIABLE CONDUCTING MEANS TO SAID PHASING TERMINAL, UNIDIRECTIONAL CONDUCTING MEANS, MEANS FOR CONNECTING SAID UNIDIRECTIONAL CONDUCTING MEANS BETWEEN SAID CONTROL ELECTRODE AND SAID FIRST POWER ELECTRODE OF SAID VARIABLE CONDUCTING MEANS.