Abstract: The method of producing a metallic, ceramic, or metal ceramic, part, employing powdered material, that includes:(a) forming two or more oversize powder material preforms respectively corresponding to two or more sections of the ultimate part to be produced,(b) placing said preforms in side-by-side relation, and(c) consolidating said preforms at elevated temperature and pressure to weld said sections together and to reduce the sections to ultimate part size.

Abstract: The invention relates to a multi-lobe composite casing, the inner wall of said casing being constituted by several adjacent cylindrical sectors, each enveloping a screw over the portion of the latter outside the penetration zone. According to the invention the hardest metal layer deposited on the inner wall of the body is applied in the form of a powder containing the desired constituents. This powder is welded to the metallic inner base wall by means of a plasma torch operating on the principle of a transferred arc or a semi-transferred arc. The invention is applied to machines with several overlapping screws of the extruder type.

Abstract: A method and apparatus for solid phase welding of pipes. A first internal clamping mechanism is employed substantially immediately adjacent the end of each pipe to urge each end into circumferential accuracy. A second internal or external clamping mechanism is employed in axial spaced relation to the first mechanism and which bears upon a greater surface of the pipe than the first mechanism, and is utilized to urge the two pipe ends together so that in combination with the application of heat, a pressure weld, joining the pipe ends, is effected.

Abstract: A system for preparing the abutting ends of pipe sections which are to be subsequently pressure welded together by the application of external heat to the joint and axial inward pressure on the respective pipe sections. The pipe ends are initially formed, or subsequently ground or cut so that the radially innermost portions of the ends are in contact with each other, and the radially outermost portions of the ends are slightly spaced from each other, preferably providing a radially outward diverging gap between the pipe ends.

Abstract: A rotary rock bit is formed from at least two individual segments. The individual segments are positioned together and aligned in the proper position for the final assembled bit. The seams between the individual segments are in the form of square-butt type joints and the adjoining segments have surface areas that are in abutting relationship to each other. A beam of energy such as an electron beam or a laser beam is directed into the seams. Relative movement between the beam and segments of the bit causes the beam to traverse the seams and join said individual segments together throughout substantially all of said abutting surface areas.

Abstract: A baking pan comprising a bottom wall and side walls formed from a single blank of sheet metal having smooth inner and outer wall surfaces and providing corners connecting the adjacent side walls which are substantially thicker than the side walls. The terminal portions of the side walls remote from the bottom wall having flange portions formed to impart rigidity to the pan and provide securement means to other pans when positioned in a side-by-side relationship. A circumferential band encompassing multiple pans in a side-by-side relationship to complete the assembly of pans.

Abstract: A method of treating a solution comprising ions of gold and cyanide is disclosed. The method comprises treating the solution with metallic gold to precipitate therefrom metallic silver.

Abstract: This invention generally relates to a method for butt welding high strength aluminum and magnesium alloys. More particularly this invention pertains to a novel technique for welding (a) high strength aluminum alloys to each other, (b) high strength magnesium alloys to each other, and (c) high strength aluminum alloys to high strength magnesium alloys, under a combination of controlled pressure, temperature and time conditions.

Abstract: There is disclosed a method for the manufacture of golf clubs of the iron type having the capability of imparting better loft and directional stability to golf balls. This capability results from the manufacture of the golf irons with desirably low centers of gravity and a generally symmetrical weight distribution about the striking face. The method of manufacture comprises casting a head having a hozel, neck and body dependent thereon and providing the body with an open cavity in its face that extends from at least one edge thereof across a substantial portion of the face and to a first depth therein. Faceplate land grooves are formed along opposite edges of the cavity. A sheet metal plate having a thickness approximately equal to the depth of these grooves is formed with exterior dimensions to seat in the opposite land grooves of the cavity and is placed in the land grooves thereby closing the face to the cavity.

Abstract: A method for bonding bodies made of metallic material is described herein, which method is characterized in that one ends of metallic bodies are butted against each other with a light mechanical load applied to the butted portion, and under such a loaded condition the proximity of said butted portion is subjected to a temperature cycle passing over a transformation point of said materials, whereby said metallic bodies may be pressure bonded while super-plastic phenomena are generated in said butted portion of said metallic bodies.

Abstract: Members are welded together by indirect application of heat, as for welding internal battery posts for connecting groups of plates or terminal posts electrically, through the use of a plurality of heated elements simultaneously engaging posts to be welded together, and wherein the configuration of molten material is controlled as the weld cools, by the use of a templet. The elements are heated, preferably by application of open flame through a plurality of mixing systems for the fuel, with one system being provided for each heated element.

Abstract: Described are two methods of producing a hollow body, comprised of semiconductor material, especially silicon, by precipitation from a gaseous compound of said semiconductor material upon the surface of a heated carrier body, which after a sufficiently thick layer of semiconductor material has been precipitated, is removed again without damaging said layer. One method is characterized by using a hollow carrier body, open at least at two opposite sides. In one embodiment, prior to the precipitation of the semiconductor material, one of the open sides of the carrier body is covered by a wafer from the same semiconductor material whose shape corresponds to the open side. Thereafter, the semiconductor material is precipitated from the gaseous compound until the desired layer thickness and a gas-tight connection is obtained between the layer and the covering semiconductor material. The second method precipitates a semiconductor layer and thereafter welds a cover on one or both open ends the tube.