Abstract: A projection welding electrode holder has a holder body, a holder barrel, and a coned-disc spring. The holder body is configured for attachment to a welding machine and defines a holder body bore. The holder barrel is carried within the holder body bore and has a holder head that extends therefrom for attachment to a welding electrode. The holder barrel is movable relative to the holder body between a first position, in which the holder head extends from the holder body bore a first distance, and a second position, in which the holder head extends from the holder body bore a second distance, the first distance being greater than the second distance. The coned-disc spring resides within the holder body bore, biases the holder barrel toward the first position, and is compressed by movement of the holder barrel from the first position to the second position.

Abstract: A water cooled resistance welding assembly includes a tubular housing with an internal coolant system for efficiently removing heat from the inboard surface of a flat faced electrode for resistance welding either studs or nuts.

Abstract: A welding nose has a digital end and a root portion joined by a plurality of surface segments having a progressively increasing outside diameter for distributing welding loads in a radial direction and for forming a plurality of smooth surfaces joined at intersections to define preformed depressions for flow of metal grains from the base material of the welding nose for reducing formation of wings on the outermost diameter of the welding nose thereby to reduce sub-surface fracturing so as to maintain a desired mean diameter over extended periods of use.

Abstract: A base is mounted on a welding machine and has slide rails. Each rail has paired flat top sides angularly converging upwardly toward one another. A table has slide channels also each having paired flat sides angularly converging upwardly toward one another at angles substantially equal to that of the rails. The table channels rest on the rails with their flat sides in sliding relationship to the flat sides of the rails. When welding forces are applied to the table, the flat sides of the rails and channels jam or wedge into substantially solid electrical contact at their interface due to their angulation. A shield is attached to the end of the table and covers the rails in their exposed projection beyond the table. In a table having two welding locations, a shield is attached at both ends of the table. The shields protect the rails against welding spatter, dust, etc., to keep the rails clean to insure maximum electrical contact.