Transistor converters

Claim 1

IN COMBINATION WITH A POWER FACTOR A.C. LOAD, A POWER SUPPLY DEVICE FOR CONVERTING DIRECT CURRENT TO ALTERNATING CURRENT COMPRISING A DIRECT CURRENT SOURCE HAVING FIRST AND SECOND TERMINALS, A TRANSFORMER HAVING A PRIMARY WINDING AND A SECONDARY WINDING, SAID PRIMARY WINDING HAVING TWO END TERMINALS AND AN INTERMEDIATE TERMINAL TAPPED OFF BETWEEN SUCH END TERMINALS WHEREBY TO ESTABLISH A PRIMARY CIRCUIT HAVING TWO BRANCHES, SAID INTERMEDIATE TERMINAL BEING CONNECTED TO THE FIRST TERMINAL OF THE DIRECT CURRENT SOURCE, SAID SECONDARY WINDING HAVING OUTPUT TERMINALS TO WHICH THE A.C. LOAD IS CONNECTED SO THAT A COMPONENT OF CURRENT FROM THE LOAD WHICH IS NOT IN PHASE WITH THE LOAD VOLTAGE WILL FLOW ALTERNATELY IN THE TWO BRANCHES OF THE PRIMARY CIRCUIT, SAID FIRST AND SECOND TRANSISTORS EACH HAVING A BASE, A COLLECTOR AND AN EMITTER, TWO SIGNAL GENERATING MEANS EACH HAVING TWO TERMINALS, ONE TERMINAL OF ONE SIGNAL GENERATING MEANS BEING CONNECTED TO ONE TERMINAL OF THE OTHER SIGNAL GENERATING MEANS BY A COMMON LEAD WHICH IS ALSO CONNECTED TO THE SECOND TERMINAL OF THE DIRECT CURRENT SOURCE, THE OTHER TERMINALS OF THE TWO SIGNAL GENERATING MEANS BEING RESPECTIVELY CONNECTED TO THE BASES OF THE TWO TRANSISTORS WHEREBY THE ALTERNATELY BIAS THE TRANSISTORS SO THAT DURING ONE TIME-INTERVAL THE FIRST TRANSISTOR IS CONDUCTING WHILE THE SECOND TRANSISTOR IS NON-CONDUCTING AND DURING A NEXT SUCCCEEDING TIME-INTERVAL THE SECOND TRANSISTOR IS CONDUCTING WHILE THE FIRST TRANSISTOR IS NON-CONDUCTING, THE COLLECTORS OF THE TWO TRANSISTORS BEING RESPECTIVELY CONNECTED TO THE END TERMINALS OF SAID PRIMARY WINDING, THE EMITTERS