Tungsten inert gas welding control unit with a filler metal feeding means

Claim 1

In a tungsten inert gas welding device including a welding control unit connected through current conducting means for remotely controlling the voltage, current and gas flow supplied to a welding torch, and including a rectifier connected to supply current through a motor driven rheostat to said torch, means for supplying a high frequency current to said torch, and a source of inert shielding gas connected to supply gas to said torch, the improvement in said welding control unit comrpsing: a. a rheostat control device operatively connected through said conducting means to said motor driven rheostat to preset and control the desired welding current from a preset current set on said rheostat control to current shut-off; b. an ammeter operatively connected to said rheostat control by said conducting means to determine and monitor the correct preset current; c. a voltmeter operatively connected to said rheostat control and said ammeter connected through said conducting means to monitor the desired preset voltage in the welding device; d. a gas cut-off device operatively connected to said gas supply and said welding torch to control the flow of gas from said supply to said torch e. a two-push button decay switch separate from said torch comprising a first current increasing switch and a second current decreasing switch said decay switch being operatively connected by a current conducting cable to said rheostat control wherein depressing said first switch increases the current through said motor driven rheostat to said present welding current set on said rheostat control and depressing said second switch decreases current through said motor driven rheostat to cut off said motor driven rheostat further including means responsive to said current cut off to control gas flow through said gas cut-off device to cut off said gas supply to said torch at current cut-off, said two push button decay switch further comprising a means for feeding a filler metal for welding and including a means for controlling the tension on said filler metal.