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Arc Welding Gun.
You will be able spot weld sheet metal without a back up, also tack weld, and burn holes in sheet metal faster than you can drill them.
The secret of it's operation is the copper nozzle that acts as a shield and heat sink for the arc. The tremendous heat is concentrated on a small area for a short time, and with the springs tending to push the gun back at the same time the rod is burning off, a spot, plug, or tack can be made in less than a second.
Three pages ( 2 sheets - front and back on first, front only on second )
B & W photos, illustrations, expanded views, and instructional narrative.
My plans are from original source materials such as books, magazines and other publications and the pages are carefully removed.
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