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7414222 |
Method and apparatus for pulse and short circuit arc welding
A method and apparatus for multi process welding includes providing a controlled short circuit output and a pulse output in response to a user selection across a workpiece output stud and a torch...
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7411156 |
Electric arc welding system
An electric arc welding system for creating a first AC welding arc with a first current waveform between a first electrode and a workpiece by a first power supply and a second AC welding arc with a...
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7397015 |
Metal cored electrode for open root pass welding
A method and apparatus of forming a root bead in a gap between spaced ends of at least one workpiece. The gap includes an open root. A metal cored electrode having a metal sheath and core materials...
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