Ph.  510.599.0575   Berkeley CA     email.  dgranett (at) dangyro (dot) com






1. Field of invention


The present invention relates to Gas tungsten arc welding (GTAW), also known as TIG welding which uses an electrical arc between a non-consumable tungsten electrode and the metal workpiece to produce a weld. The weld area and electrode are protected from oxidation or other atmospheric contamination by an inert shielding gas. Normally, a filler metal is used and this is fed either manually or by robot along the weld.

Often the tip of the electrode accidentally contacts the weld puddle thus fowling the tip by wetting it with molten workpiece metal, covering the point of the electrode, or it may otherwise require replacement. This causes delays in the work by requiring removal of the electrode and resharpening the tip on a grinder. During a workday, these occurrences can add up to much wasted time and effort and repeatedly interrupt the smooth workflow. Additionally regrinding of an electrode may introduce contamination from the grinder or from remaining chemicals previously adhering to the electrode.


2.  Summary


The TIG torch of the present invention includes a plurality of spare electrodes held by a magazine or cylinder or other holder, each one containing multiple replacement electrodes and allowing fast ejection of a fouled, damaged, or worn electrode with a fresh replacement ready for use within seconds. Thus, the present invention completely eliminates the need to sharpen electrodes.

This invention will save a great amount of wasted time and energy by eliminating the interruptions traditionally caused by the repeated need to remove a faulty electrode and re-dress the tip before replacing it in the torch and continuing the job. Advantageously, by simply inserting a fresh magazine or cylindrical container full of spare electrodes, continuous uninterrupted welding can be realized, and efficiently completed fabrication jobs will result.

Additionally the present invention, by virtue of internally stored or externally attached plurality of spare electrodes allows replacement of the deficient electrode by a fresh pre-sharpened electrode within a few seconds. The ejected electrodes can be recycled and fresh supplies of cylindrical or spring loaded magazines pre-filled with pre-sharpened electrodes can be purchased at welding supply outlets.

Another object is to provide disposable electrodes which are factory preground to a precise point angle with absolute assurance that there is no point surface contamination.


  Alternate systems   

Cylinder electrode cartridge            Spring loaded magazine