Bridge type d. c. to a. c. inverter

Claim 1

A TRANSISTOR SYSTEM FOR CONVERTING A DIRECT CURRENT VOLTAGE, WHICH IS RELATIVELY LARGE IN MAGNITUDE WITH RESPECT TO THE EMITTER-COLLECTOR ALPHA BREAKDOWN VOLTAGE OF THE TRANSISTOR, INTO ALTERNATING CURRENT COMPRISING; A BRIDGE TYPE NETWORK HAVING INPUT AND OUTPUT TERMINALS, SAID BRIDGE NETWORK ARRANGED TO HAVE FOUR LEGS TO SELECTIVELY CONDUCT CURRENT FROM SAID INPUT TERMINALS TO SAID OUTPUT TERMINALS; A SOURCE OF DIRECT CURRENT CONNECTED TO SAID INPUT TERMINALS; A LOAD DEVICE CONNECTED TO SAID OUTPUT TERMINALS; A PLURALITY OF FIRST TRANSISTORS EACH HAVING BASE, EMITTER AND COLLECTOR ELECTRODES AND EACH OPERATED IN COMMON EMITTER CONFIGUATION; A PLURALITY OF SECOND TRANSISTORS EACH HAVING BASE, EMITTER AND COLLECTOR ELECTRODES AND EACH OPERATED IN COMMON BASE CONFIGURATION; ONE OF SAID FIRST PLURALITY OF TRANSISTORS AND ONE OF SAID SECOND PLURALITY OF TRANSISTORS AND CONDUCTIVE MEANS TO FORM EACH OF SAID LEGS IN SAID BRIDGE NETWORK, SAID CONDUCTURE MEANS CONNECTING THE COLLECTOR OF SAID FIRST TRANSISTOR TO THE EMITTER OF SAID SECOND TRANSISTOR; FEEDBACK MEANS CONNECTED TO EACH BASE ELECTRODE OF SAID PLURALITY OF FIRST TRANSISTORS, SAID FEEDBACK MEANS RESPONSIVE TO CURRENT FLOW IN SAID BRIDGE NETWORK AND ARRANGED TO ENERIGIZE SAID FIRST TRANSISTORS; BIAS MEANS CONNECTED TO EACH BASE ELECTRODE OF SAID PLURALITY OF SEC-