Capacitor means for controlling the conduction of unidirectional switching devices in a power supply

Claim 1

A D.C. TO A.C. POWER SUPPLY CONVERTER SYSTEM COMPRISING: A PAIR OF D.C. INPUT TERMINALS, AN OUTPUT TRANSFORMER HAVING A PRIMARY AND A SECONDARY WINDING AND A VARIABLE WIDTH PULSE SUPPLYING CIRCUIT CONNECTED BETWEEN SAID D.C. INPUT TERMINALS AND SAID PRIMARY WINDING FOR ALTERNATELY COUPLING VARIABLE WIDTH PULSES IN OPPOSITE DIRECTIONS THROUGH SAID PRIMARY CIRCUIT AND INCLUDING FIRST AND SECOND MAIN LOAD CURRENT CARRYING UNIDIRECTIONAL SWITCHING MEANS, AND FIRST AND SECOND CONTROL UNIDIRECTIONAL SWITCHING MEANS CONNECTED TOGETHER IN THE FORM OF A BRIDGE CIRCUIT WITH ONE OF SAID SWITCHING MEANS IN EACH OF ITS ARMS AND THE MAIN LOAD CURRENT CARRYING SWITCHING MEANS IN CONTIGUOUS ARMS OF THE BRIDGE CIRCUIT, SAID D.C. INPUT TERMINALS BEING CONNECTED TO SAID BRIDGE CIRCUIT AT OPPOSITE ENDS OF ONE DIAGONAL THEREOF WHICH SPANS THE ARMS CONTAINING THE MAIN LOAD CURRENT CARRYING SWITCHING MEANS, ONE END OF SAID PRIMARY WINDING BEING CONNECTED TO ONE SIDE OF THE OTHER DIAGONAL OF SAID BRIDGE AT THE JUNCTION OF SAID MAIN LOAD CURRENT CARRYING SWITCHING MEANS, THE OTHER END OF SAID PRIMARY WINDING BEING CONNECTED TO A COMMON POINT, A FIRST CAPACITOR CONNECTED FROM ONE OF SAID INPUT TERMINALS TO SAID COMMON POINT, A SECOND CAPACITOR CONNECTED FROM THE OTHER INPUT TERMINAL TO SAID COMMON POINT, A THIRD CAPACITOR CONNECTED AS THE OTHER DIAGONAL