Welding apparatus and method of welding
First Claim
1. ARC WELDING APPARATUS FOR WELDING WORK INCLUDING POWER SOURCE MEANS, VARIABLE IMPEDANCE MEANS, SAID VARIABLE IMPEDANCE MEANS INCLUDING A PLURALITY OF SEPARATE IMPEDANCES, EACH IMPEDANCE HAVING A HIGHER MAGNITUDE AND A LOWER MAGNITUDE, MEANS CONNECTING SAID SOURCE MEANS AND SAID VARIABLE IMPEDANCE MEANS IN A WELDING CURRENT SUPPLY CIRCUIT WITH SAID WORK WITH SAID SEPARATE IMPEDANCES CONNECTED AS SEPARATE PARALLEL BRANCHES TO CONDUCT PREDETERMINED PORTIONS OF THE WELDING CURRENT, SAID CONNECTING MEANS INCLUDING SELECTIVE SWITCH MEANS IN EACH SAID BRANCH TO CONNECT THE CORRESPONDING IMPEDANCE TO, OR DISCONNECT SAID CORRESPONDING IMPEDANCE FROM, SAID CIRCUIT, THE CURRENT IN SAID CIRCUIT HAVING WELDING MAGNITUDE WITH SAID SEPARATE IMPEDANCES SET AT THEIR LOWER MAGNITUDES AND HAVING CRATER-LESS WELD TERMINATING MAGNITUDE WITH SAID IMPEDANCES SET AT THEIR HIGHER MAGNITUDES, AND SELECTIVELY ACTUABLE SWITCH MEANS FOR CONVERTING THE SETTING OF SAID IMPEDANCES FROM ONE OF SAID MAGNITUDES TO THE OTHER.
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1 Claim
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1. ARC WELDING APPARATUS FOR WELDING WORK INCLUDING POWER SOURCE MEANS, VARIABLE IMPEDANCE MEANS, SAID VARIABLE IMPEDANCE MEANS INCLUDING A PLURALITY OF SEPARATE IMPEDANCES, EACH IMPEDANCE HAVING A HIGHER MAGNITUDE AND A LOWER MAGNITUDE, MEANS CONNECTING SAID SOURCE MEANS AND SAID VARIABLE IMPEDANCE MEANS IN A WELDING CURRENT SUPPLY CIRCUIT WITH SAID WORK WITH SAID SEPARATE IMPEDANCES CONNECTED AS SEPARATE PARALLEL BRANCHES TO CONDUCT PREDETERMINED PORTIONS OF THE WELDING CURRENT, SAID CONNECTING MEANS INCLUDING SELECTIVE SWITCH MEANS IN EACH SAID BRANCH TO CONNECT THE CORRESPONDING IMPEDANCE TO, OR DISCONNECT SAID CORRESPONDING IMPEDANCE FROM, SAID CIRCUIT, THE CURRENT IN SAID CIRCUIT HAVING WELDING MAGNITUDE WITH SAID SEPARATE IMPEDANCES SET AT THEIR LOWER MAGNITUDES AND HAVING CRATER-LESS WELD TERMINATING MAGNITUDE WITH SAID IMPEDANCES SET AT THEIR HIGHER MAGNITUDES, AND SELECTIVELY ACTUABLE SWITCH MEANS FOR CONVERTING THE SETTING OF SAID IMPEDANCES FROM ONE OF SAID MAGNITUDES TO THE OTHER.
Specification
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Current AssigneeJames E. Frederick
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Original AssigneeJames E. Frederick
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InventorsFrederick, James E.
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Application NumberUS04/357,897Time in Patent Office777 DaysField of SearchUS Class Current219/130.5CPC Class CodesB23K 9/1037 Means preventing crater for...
