Abstract: The specification discloses metallic structural channel members for building construction which are characterized by low thermal conductivity and low sound transmission. The channel members have two end panels connected by a side panel. The side panel has a plurality of rows of strips, severed from the side panel along two coextensive parallel slits and stretched out of the plane of the panel. The rows of strips are displaced variously all to one side or all to the other, or part to one side and part to the other of the side panel. The end panels are also provided with severed strips, somewhat wider than the strips on the side panel, for mounting wall board or metal lath elements.

Abstract: A strip of electroconductive material is perforated by I-shaped holes. Contact materials shaped to conform to said I-shaped holes are inserted in the holes and swaged. Then, the I-shaped contact materials are perforated across the middle thereof in conjunction with the adjoining portions of the electroconductive material so as to divide each contact material into two contacts separated by a contact gap formed therebetween. A leaf spring fitted at one end thereof with a movable contact intended for insertion into said contact gap is held in position, though not in an immobilized state, with the other end thereof simply inserted around the stem of a spring support. Terminals which are retained in their fixed relative position by means of a webbing interconnecting them are fastened with adhesive agent to a plastic case. After the fastening, said webbing is cut off.

Abstract: A fence dropper which may be used as a spacer or a post and which is suitable for supporting the wires of a wire fence, the fence dropper being provided with a series of tongues each of which is joined to but spaced from one edge of the body portion by a root. Each tongue is provided with a forwardly extending portion and a return portion which constitute with the body of the dropper a wire retaining aperture, but since the tongues are spaced from the dropper by their roots, the tongues form with the dropper edge slots in a plane which is at right angles to a fence, the arrangement then being such that a dropper may be positioned against a fence with wires in respective slots and rotated through 90.degree. whereupon the wires become contained within the wire retaining recesses.

Abstract: A method of coldworking a hole through a work piece which includes the steps of placing a seamless tubular member through the hole in the work piece, passing a mandrel through the tubular member so that the tubular member is expanded radially and circumferentially sufficiently to expand the material in the work piece about the hole beyond its elastic limit, and longitudinally fracturing the tubular member after substantially maximum expansion of the tubular member. The application also contemplates a tubular member construction for use in the method and a tool for performing the method.

Abstract: A pair of .omega.-section metallic channels are juxtaposed to form a hollow core with their flat flanges coextensively contacting one another. This core is advanced in steps having a length equal to an even multiple of the predetermined distance toward a work station. Strips are pulled off a pair of supplies at this station and the ends of these strips are advanced toward locations on the core which are spaced apart by the predetermined distance. These strips are advanced by an increment on each step advance of the core. The ends of the strips are spot welded to the flanges on the respective side of the core and the end sections are cut between incremental advances of the strips and step advances of the core to leave a pair of strip arms welded to the core and spaced longitudinally apart by the predetermined distance. The free end of each arm is formed with a split and these split ends are bent in opposite directions to opposite sides of the split.