Abstract: A steel nut body has its wrench flats covered by a sheet stainless steel sheath that extends over one of the nut ends to form a cap. The surfaces of the wrench flats are formed with ridges that bear against the inner surfaces of the sheath. The sheath is welded to the nut to resist forces exerted during torquing by bringing a pair of electrodes into pressured contact with the sheath on opposed sides of the nut to produce pressure concentrations at the ridges. An extremely short, high current electrical pulse is then passed between the electrodes. The heating produced by the current at the interface between the sheath and the nut body decreases the electrical resistance of this path resulting in primary current flow path between the two interfaces, through the nut body, to produce resistance welds at the inner faces without substantially modifying the metallurgy of the sheath.

Abstract: An improved method for resistance welding two metallic articles, made of dissimilar metals which form brittle intermetallic compounds when melted together. A first one of the metallic articles is provided with a tapered, flat-topped projection which is pressed against the other metallic article. The first article preferably is composed of the metal most difficult to melt, as determined by the four parameters of melting point, electrical resistance, heat conductivity and specific heat.

Abstract: A method for producing strong resistance-welded joints between wires and massive workpieces, especially welded joints between nickel-plated copper wires and steel workpieces. The melting of the nickel coating is insured by producing locally high temperatures and pressures, due to the special configuration of the surface of the workpiece. The work surface is provided with bulges or protrusions which cause a concentration of electrical current and electrode pressure.

Abstract: A bracket of generally U-shaped cross-section comprising spaced-apart legs terminating in edges having projections thereon is joined to a cylindrical steel wall by a method that comprises the steps of: (a) locating the bracket so that said edges extend along the length of the cylindrical steel wall and said projections contact the external surface of the wall, (b) projection-welding the bracket to the wall by an operation that collapses the projections, locates the edges closely adjacent the external surface of the steel wall, and provides a gap of V-shaped cross-section between each edge and the external surface of the wall, and (c) then fillet-welding the bracket to the wall by applying a welding fillet to the external surface of the wall and the outer surface of each leg of the bracket in the region of the V-shaped gap.

Abstract: A method of manufacturing a friction band useful as either a brake band or a transmission band is provided. The band includes an arcuate metallic strip lined with a frictional strip. These strips are adhered together while in a flat, straight condition. The adhered strips are then formed into a generally arcuate shape, with the lining strip on the interior. Brackets are then provided on each free end of the metallic strip. The brackets are welded to the metallic strip. Sufficient area of the metallic strip is exposed in the area of the brackets to permit use of closely adjacent electrodes against the bracket and metallic strip.

Abstract: Disclosed subject matter includes flexible motor mounting members particularly adapted for vibration induced flexing movement combined with oscillatory movement about a pivot axis at a point of attachment on a blower housing or other support. Short but strong mounting members are provided that have low torsional mode vibration transmissibilities. Leaf spring mounting arms have low torsional spring constants and yet have sufficient strength to withstand shipping and handling loads for motor assemblies and to permit all angle motor mounting. The mounting member spring constants for axial, radial and tilting vibration modes are selected in specific forms so that the characteristic vibration transmissibility ratios for these modes are each close to unity. However, the characteristic torsional mode vibration transmissibility is substantially less than unity. In particularly preferred embodiments of the invention, sheet steel having a martensitic grain structure is utilized to form the mounting members.

Abstract: A method and apparatus for positioning nuts to be welded to a base such as a steel sheet. The base is located between a pair of relatively movable welding electrodes, one of which has a retractable nut supporting and locating pin with a tapered shoulder, the pin being movable in the electrode and extending from its contact face. A nut is placed on the pin and locked onto the tapered shoulder. As the electrodes move together to a welding position the supporting and locating pin is depressed so that the nut comes into engagement with the contact face of the respective electrode. The nut is consequently freed from its taper lock on the supporting and locating pin as it is pressed against the base by the contact face of the respective electrode. Welding current is then passed between the electrodes through the nut and the base to weld the nut in place.

Abstract: Welding apparatus for making metal honeycomb core panels by welding together preformed corrugated metal strips is disclosed. The assembled portion of the core panel is positioned by vertical finger electrodes on a horizontal base with the core panel workpiece end located along the line of a welding station extending across the base. The finger electrodes are arranged in two rows extending parallel to the welding station line, one row being insertable into the honeycomb core from above and the other being insertable into the core from below, each row also being movable from a first workpiece engaging position to a second welding position with one edge thereof along a welding station line. Welding heads, each including a welding element, are movable to and from the welding station. A corrugated metal strip is detachably held onto and carried to the welding station by the welding heads.

Abstract: The invention provides a method for the electrical resistance welding of coated sheet metals, in which welding current is fed to at least one of the coated sheets indirectly through the metal layer thereof and contact is established between blanc areas thereof to be welded to each other, wherein annular or elongated knife edges are provided at the welding area of the sheet metal to be welded on or on intermediate welding pieces, and cavities are produced by embossing and/or by milling, for preserving an outer coating undamaged by the heat of welding.