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US 4,538,048 AGranted
Welding method and equipment therefor
OwnerBjorn Heedinventor
Life of this patent
Estimating the term…
Abstract
A method and system of eliminating welding fumes by subjecting the air close to the welding point to a quiet electric discharge between an electrode supplied with a high voltage of direct current, and the work piece or another grounded object.
Claims20
Welding means, comprising:
- a grounded electrode for connection to a workpiece to be welded, a source of electrical energy, a welding electrode connected to said source of electrical energy for welding said workpiece at a point, at least one further electrode, means for supporting said further electrode adjacent said point of welding at said workpiece, and a current source for generating high voltage direct current, said current source having a first terminal connected to said further electrode, and a second terminal for connection to said workpiece, whereby upon a high-voltage discharge from said further electrode smoke particles formed at the point of welding will be electrically charged and deposited at least on one of said grounded electrode and workpiece.
A method of electrical welding a workpiece comprising the steps of:
- grounding an electrode to a workpiece to be welded;
- connecting a welding electrode to a source of electrical energy;
- welding said workpiece at a point with an arc formed by said welding electrode;
- the improvement comprising the steps of providing a high voltage electrode in the welding area;
- and establishing a high voltage electrical discharge from said high voltage electrode to the workpiece in the welding area during welding for minimizing particle emission.
2 more elements
Dependencies are inferred from the claim text.