Pulse power welding system

Claim 1

A SYSTEM FOR PROVIDING RESISTANCE WELDING CURRENTS, COMPRISING: A SOURCE OF ALTERNATING CURRENT ELECTRIC POWER; A CAPACITOR; A TRANSFORMER HAVING A METAL CORE, A PRIMARY WINDING SUBSTANTIALLY SURROUNDING THE ENTIRE LENGTH OF ONE LEG OF SAID CORE AND A SECONDARY WINDING SUBSTANTIALLY SURROUNDING THE ENTIRE LENGTH OF SAID PRIMARY WINDING; AND A CONTROL CIRCUIT CONNECTED IN SERIES WITH SAID CAPACITOR AND THE PRIMARY WINDING OF SAID TRANSFORMER ACROSS SAID SOURCE OF ALTERNATING CURRENT POWER, SAID SERIES PATH BEING THE SOLE CURRENT SOURCE FOR SAID CAPACITOR, SAID CONTROL CIRCUIT INCLUDING A PAIR OF GASEOUS SWITCHING TUBES CONNECTED SO THAT EACH MAY BE CONDUCTIVE DURING A PORTION OF ALTERNATE HALF CYCLES AND MEANS FOR CONTROLLING THE FIRING OF SAID SWITCHING TUBES SO AS TO ALLOW PASSAGE OF CURRENT TO THE REMAINDER OF SAID CIRCUITRY DURING A SHORT PERIOD IN EACH ALTERNATING CURRENT HALF CYCLE WHICH OCCURS IN GENERAL SYNCHRONISM WITH THE OCCURRENCE OF PEAK VOLTAGE IN SAID HALF CYCLE.