Inverter apparatus

Claim 1

AN IMPROVED INVERTER CIRCUIT ARRANGEMENT COMPRISING A D.C. POWER SOURCE HAVING POSITIVE AND NEGATIVE TERMINALS, A CHOKE COIL CONNECTED IN SERIES WITH ONE OF SAID TERMINALS OF SAID SOURCE, TWO ELECTRICAL SWITCHING UNITS, EACH UNIT HAVING AN ANODE, A CATHODE, AND A CONTROL ELECTRODE, THE ANODES OF SAID UNITS CONNECTED IN PARALLEL WITH EACH OTHER AND IN SERIES WITH SAID CHOKE COIL, EACH OF SAID CONTROL ELECTRODES OPERATIVELY CONNECTED TO A TRIGGER CIRCUIT, A COMMUTATING WINDING HAVING TAPS AT EACH END THEREOF, A CENTER TAP, AND TWO ADDITIONAL TAPS, ONE INTERMEDIATE EACH END TAP AND THE CENTER TAP, EACH OF THE END TAPS OF SAID COMMUTATING WINDING CONNECTED ELECTRICALLY WITH ONE OF SAID CATHODES OF SAID UNITS, THE CENTER TAP OF SAID WINDING ELECTRICALLY CONNECTED TO THE OTHER TERMINAL OF SAID SOURCE, TWO DIODE UNITS, EACH PROVIDED WITH AN ANODE AND A CATHODE, EACH OF SAID CATHODES OF SAID DIODE UNITS ELECTRICALLY CONNECTED IN PARALLEL WITH EACH OTHER AND IN SERIES WITH SAID ONE TERMINAL OF SAID SOURCE, EACH OF SAID ANODES OF SAID DIODE UNITS CONNECTED TO A SEPARATE ONE OF SAID ADDITIONAL TAPS OF SAID COMMUTATING WINDING, A COMMUTATING CAPACITOR ELEMENT CONNECTED ACROSS THE CATHODES OF SAID SWITCHING UNITS, AN OUTPUT TRANSFORMER COMPRISING A PRIMARY WINDING PROVIDED WITH TWO END TAPS AND A CENTER TAP, SAID CENTER TAP OF SAID TRANSFORMER WINDING ELECTRICALLY CONNECTED TO SAID OTHER TERMINAL OF SAID SOURCE, EACH OF SAID END TAPS OF SAID TRANSFORMER WINDING ELECTRICALLY CONNECTED TO ONE OF SAID CATHODES OF SAID SWITCHING UNITS TO CONNECT THE SAID TRANSFORMER WINDING IN PARALLEL WITH SAID COMMUTATING WINDING, SAID OUTPUT TRANSFORMER FURTHER COMPRISING A SECONDARY WINDING OPERATIVELY CONNECTED TO AN ELECTRICAL LOAD.