Semiconductor inverter circuit with means to preset the core flux of the transformer

Claim 1

SEMICONDUCTOR APPARATUS FOR CONVERTING A SOURCE OF DIRECT CURRENT TO ALTERNATING CURRENT, COMPRISING: FIRST AND SECOND CONTROLLED RECTIFIERS EACH HAVING AN INPUT ELECTRODE, AND OUTPUT ELECTRODE AND A CONTROL ELECTRODE; A SOURCE OF DIRECT CURRENT POTENTIAL; TRANSFORMER MEANS COMPRISING A CORE, A PRIMARY WINDING AND OUTPUT MEANS; CONNECTION MEANS INCLUDING SAID PRIMARY WINDING CONNECTING SAID SOURCE TO SAID INPUT ELECTRODES AND TO SAID OUTPUT ELECTRODES OF SAID FIRST AND SECOND CONTROLLED RECTIFIERS; CURRENT CONTROL MEANS HAVING A CONTROL ELEMENT, SAID CURRENT CONTROL MEANS CONNECTED INTERMEDIATE SAID SOURCE AND SAID TRANSFORMER MEANS; SIGNAL MEANS CONNECTED TO SAID CONTROL ELEMENT OF SAID CURRENT CONTROL MEANS TO CAUSE IT TO CONDUCT CURRENT THERETHROUGH IMMEDIATELY UPON APPLICTION OF POTENTIAL FROM SAID SOURCE TO CAUSE A PREDETERMINED PRESET OF THE FLUX IN THE CORE OF SAID TRANSFORMER MEANS; TIMING MEANS ENERGIZED FROM SAID SOURCE FOR SUBSEQUENTLY PRODUCING PERIODIC PULSES TO THE CONTROL ELECTRODES OF SAID FIRST AND SECOND CONTROLLED RECTIFIERS TO ALTERNATELY FIRE THE FIRST AND SECOND CONTROLLED RECTIFIERS IN RESPONSE THERETO TO PROVIDE AN ALTERNATING TYPE CURRENT IN SAID TRANSFORMER MEANS.