AC power supply
First Claim
1. An improved portable AC welding machine comprising:
- a liquid tight tank with a removable lid thereon;
a power transformer positioned within said tank, said power transformer comprising, a cylinderical core with an open tubular center, perforated insulation material enclosing said core, a primary electrically winding wound over said perforated insulation material, a wrapping of porous insulation material over said primary winding and a secondary winding wound over said porous insulation material, the ends of said primary and secondary windings extend external of said tank;
an insulating medium within said tank engulfing said power transformer, said insulating medium is liquid at least when said power transformer is at operating temperature;
a pair of welding cables extending from said ends of said secondary windings; and
a power source for connecting to said ends of said primary winding.
1 Assignment
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Accused Products
Abstract
The invention is directed to an AC power supply for portable welding machines or the like which employ a transformer of either single or multi-phase power wound around a cylindrical core. The core is constructed from a continuous length of steel alloy ribbon. The individual windings of both the primary and secondary are spaced apart. In operation the transformer is submerged in a heat transfer medium to provide cooling thereof by heat transfer therefrom. The transformer may have either a tapped primary or secondary or both to provide secondary amperage for the intended use of the transformer. An external cooling radiator may be employed to provide additional cooling to the heat transfer medium.
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Citations
24 Claims
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1. An improved portable AC welding machine comprising:
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a liquid tight tank with a removable lid thereon; a power transformer positioned within said tank, said power transformer comprising, a cylinderical core with an open tubular center, perforated insulation material enclosing said core, a primary electrically winding wound over said perforated insulation material, a wrapping of porous insulation material over said primary winding and a secondary winding wound over said porous insulation material, the ends of said primary and secondary windings extend external of said tank; an insulating medium within said tank engulfing said power transformer, said insulating medium is liquid at least when said power transformer is at operating temperature; a pair of welding cables extending from said ends of said secondary windings; and a power source for connecting to said ends of said primary winding. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 23, 24)
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22. The invention as defined in clain 21 wherein said external cooling means comprises a first conduit communicating with the liquid in said container, a radiator element having a fluid input and output, with said input connected to said first conduit, a second conduit connected to said output of said radiator and communicating with said container, a pump means for circulating said liquid from said container through said radiator and back to said container and a fan for forcing air across said radioator element.
Specification