Adjustable single phase power supply for welding

Claim 1

A POWER SUPPLY FOR WELDING, PREFERABLY SHORT-ARC WELDING, COMPRISING A SOURCE OF ALTERNATING CURRENT AT SUBSTANTIALLY WELDING VOLTAGE, MEANS COUPLED TO SAID SOURCE OF ALTERNATING CURRENT FOR RECTIFYING THE OUTPUT OF SAID SOURCE OF ALTERNATING CURRENT, A PAIR OF LOAD TERMINALS FOR ELECTRICAL CONNECTION TO AN ELECTRODE AND WORK TO BE WELDED, AN ELECTRICAL CONNECTION FROM ONE SIDE OF SAID RECTIFIER MEANS TO ONE OF SAID LOAD TERMINALS, AN ELECTRICAL CONNECTION FROM THE OTHER SIDE OF SAID RECTIFIER MEANS TO THE OTHER OF SAID LOAD TERMINALS, BOTH OF SAID ELECTRICAL CONNECTIONS BEING CAPABLE OF CONTINUOUSLY CARRYING CURRENT REQUIRED TO PRODUCE WELDING OF METAL, A TANK CIRCUIT BETWEEN SAID RECTIFIER AND SAID LOAD TERMINALS, SAID TANK CIRCUIT INCLUDING, AN INDUCTANCE IN ONE OF SAID LOAD TERMINAL CONNECTIONS AND CONDENSER MEANS ELECTRICALLY CONNECTED IN CIRCUIT ACROSS SAID RECTIFIER WITH ONE SIDE OF SAID CONDENSER MEANS CONNECTED BETWEEN SAID RECTIFIER AND SAID INDUCTANCE, AND MEANS FOR ADJUSTING THE TIMING OF VOLTAGE PULSES DEVELOPED BETWEEN SAID LOAD TERMINALS WHEN CONNECTED TO A LOAD, SAID LAST MEANS INCLUDING OPERATOR ADJUSTABLE MEANS FOR ALTERNATING THE CHARGING RATE OF SAID CONDENSER MEANS.