Patents Examined by N. D. Herkamp
  • Patent number: 4131781
    Abstract: This invention provides a process involving submerged arc welding for nickel containing steel such as steel containing 3.5 weight percent of nickel. The process uses a bond type flux of specific composition to suppress the oxygen content in the weld metal. Further, the process utilizes a cored welding wire including a core material of specific composition. As the result, it is possible to obtain a weld metal of high impact-resistance at low temperatures such as minus 100.degree. C.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: December 26, 1978
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Yoshinori Ito, Mutsuo Nakanishi
  • Patent number: 4107505
    Abstract: A weldment wherein two members are joined by a weld bounded at a back portion by a back-up member providing improved weld penetration and prevention of undesirable conditions in the weld such as root gaps or blow-throughs. The back-up member may comprise an elongated element secured to the surface of one member and, more specifically, may be welded thereto by a continuous weld.
    Type: Grant
    Filed: June 25, 1976
    Date of Patent: August 15, 1978
    Assignee: Caterpillar Tractor Co.
    Inventor: Larry G. Eftefield
  • Patent number: 4105891
    Abstract: A metal inert gas welding torch having a wire guide assembly threadably secured at one end to a torch body and a collet nut assembly threadably secured to the other end of the wire guide assembly. A spidered collet is mounted in the collet nut assembly and forms a plenum chamber with the wire guide assembly and collet nut. A contact tip is gripped by the spidered collet and extends into the plenum chamber whereby the shielding gas cools the contact tip prior to the distribution of such gas into a nozzle.
    Type: Grant
    Filed: October 4, 1976
    Date of Patent: August 8, 1978
    Assignee: Union Carbide Corporation
    Inventors: Clifford W. Hill, Donald W. Carkhuff, Frank J. Pilia
  • Patent number: 4104506
    Abstract: An arcing contact for a high current capacity switch having a pair of switch members in sliding face-to-face engagement is formed from a set of resilient laminations that shunt the switch members as the switch makes on closing or breaks on opening. One end of the set of laminations is mounted on a face of one of the switch members, usually a blade, and the other end of the set of laminations is angled so that the end surfaces or tips bear against a face of the other switch member, usually a termination, when the arcing contact shunts the switch members. While in this position, a deflection of the laminations develops a spring force that urges the tips of the laminations into contact with the termination. The tips are inwardly bevelled with respect to the face of the termination and lie in a common plane so that during electrical connection they are in a substantially parallel relationship with the face of the termination, at substantially the same pressure.
    Type: Grant
    Filed: September 13, 1976
    Date of Patent: August 1, 1978
    Assignee: Arrow Hart Inc.
    Inventor: Bernard L. Phillips
  • Patent number: 4103139
    Abstract: Welding apparatus for welding railroad rails of a construction such that it is movable plus or minus approximately two feet to compensate for the position of the continuous rail, i.e., the already welded together rail sections, as the latter is removed from the welding apparatus. Accordingly, the entire length of the continuous rail need not be moved to properly position it with respect to the welding apparatus to form or make a subsequent weld.The welding apparatus also is provided with a vertical clamping and aligning system and a horizontal clamping and aligning system, each of which contain pairs of hydraulic cylinders, one of which is larger than the other, with the larger cylinder in each case being operable to a set position with respect to the rail line of the apparatus, to position the rail. The smaller cylinder than operates to effectively clamp the rail against an arm operated by the larger cylinder. Both of the pairs of cylinders are fed from the same source of hydraulic power.
    Type: Grant
    Filed: May 12, 1976
    Date of Patent: July 25, 1978
    Assignee: H. A. Schlatter AG
    Inventor: Hans R. Zollinger
  • Patent number: 4101752
    Abstract: A process for welding the adjacent ends of frame members peripherally surrounding the interleaved straps of a fuel assembly grid which includes placing the assembled grid and its frame members into a fixture made to substantially the same dimensions as the outside dimensions of the grid. The side members of the frame are arranged such that a space appears at each of the four corners and a special tool placed in each of the four corner cells of the grid is designed to have an opening which corresponds to the openings formed on each corner of the fixture. After the tooling is placed in each of the four corner cells, the assembled grid and fixture is then placed in welding apparatus such that a welding tip thereof is placed in the tool located in a corner cell.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: July 18, 1978
    Assignee: Westinghouse Electric Corp.
    Inventor: Robert Duncan
  • Patent number: 4099044
    Abstract: Resistance welding apparatus for simultaneously welding spaced generally parallel seams in sheet metal workpieces, as for example joining a pair of side panels to the back panel of a refrigerator cabinet. The panels are clamped upon a support table with their edges to be welded disposed in overlapping relationship. Support members of high electrical conductivity engage the underside of the clamped panels along and adjacent to the overlapped edge portions of the panels. A movable overhead carriage supports a pair of rotatable disc electrodes which are positioned to roll along the overlapped edge portions of the panels in opposed relationship to the underlying support members. Also mounted on the carriage are a pair of highly conductive shoes which roll along the central panel closely adjacent the respective electrodes.
    Type: Grant
    Filed: October 12, 1976
    Date of Patent: July 4, 1978
    Assignee: Resistance Welder Corporation
    Inventors: Robert H. Blair, Donald J. Janiske
  • Patent number: 4097716
    Abstract: A welding method for forming a fillet welded joint including the steps of placing an abutting edge of a first metal member onto a surface of a second metal member at generally right angles thereto, the abutting edge having a series of alternating lands and slots extending through the entire thickness of the first member, and arc welding employing a consumable electrode to form a fully penetrated fillet weld from one side only of the joint with the weld filling the slots and melting the lands.
    Type: Grant
    Filed: September 27, 1976
    Date of Patent: June 27, 1978
    Assignee: Aluminum Company of America
    Inventors: Walter R. Reichelt, Jr., Malcolm G. Hoy
  • Patent number: 4096372
    Abstract: A purge unit is provided for establishing an enclosed zone around a weld area to receive an inert gas. The purge unit is particularly useful when a branch pipe is to be affixed to a main pipe or a header. The purge unit is inserted into an opening in the header through the branch pipe or connection and is then expanded to establish the enclosed zone around the inside of the weld area. An inert gas is then supplied to the unit into the zone to cover or blanket the inside of the weld area. After the weld is complete, the purge unit is collapsed and withdrawn through the opening and through the branch connection so as not to leave any material within the main pipe which could cause contamination.
    Type: Grant
    Filed: November 24, 1976
    Date of Patent: June 20, 1978
    Inventor: Emerson J. Hallenbeck
  • Patent number: 4096375
    Abstract: The present invention discloses a full-automatic flash welding apparatus wherein the trailing edge of the preceding strip and the leading edge of the succeeding strip are automatically accurately positioned, rigidly clamped and simultaneously cut off, the new trailing and leading edges are automatically machined and then butt welded, and thereafter the flash on the upper and lower surfaces of the joined strips is automatically removed.
    Type: Grant
    Filed: March 25, 1976
    Date of Patent: June 20, 1978
    Assignee: Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Yoshiharu Fujino, Iwane Chiba, Toshimi Chiyonobu, Tomihisa Takahata, Yasuhiko Kachi
  • Patent number: 4096373
    Abstract: A weld bead is disposed between two workpieces to be welded together by feeding the weld metal to a pool which is advancing relative to the workpieces while supporting the pool of weldment from below with a member which simultaneously serves to maintain the spacing of the workpieces and is preferably composed of tungsten. The support member can be constituted as an electrode. The pool-support member and the burner form a unit which is displaced along the welding gap between the workpieces.
    Type: Grant
    Filed: June 29, 1976
    Date of Patent: June 20, 1978
    Assignee: Linde Aktiengesellschaft
    Inventor: Heinz Roith
  • Patent number: 4095078
    Abstract: In accordance with one embodiment of the invention the packing-wire cutting device includes an electrical electrode assembly comprising a pair of arms pivotally mounted on a bearing shaft, the ends of the arms remote from the bearing shaft carrying each one a rotatable disc together forming an electrode roller supplied with electric power from a supply circuit normally open at the electrode roller which has a gap between its rotatable discs. Further the packing-wire cutting device comprises a conveyor path for the goods to be treated by said device, said goods being provided with a packing of wires crossing the sides of the goods. When the goods passes the packing-wire cutting device the electrode roller is caused to pivot towards the goods side so as to engage against this side to be rotated when the goods is advancing so that when any of the wires is passing the electrode roller it closes the supply circuit whereby the section of the wire located between the rotatable discs will melt off.
    Type: Grant
    Filed: January 6, 1976
    Date of Patent: June 13, 1978
    Assignee: Munkedals Aktiebolag
    Inventors: Lars Waenerlund, Torsten Boback
  • Patent number: 4095080
    Abstract: The extent of shielding function of an arc atmosphere is measured by the concentration of nitrogen oxide in the arc atmosphere. The concentration of nitrogen oxide in the arc atmosphere is measured by a nitrogen oxide measuring device. The measured value is indicated by an indicator. When the measured value exceeds a predetermined reference value, an alarm device is operated or a welding operation is stopped. Either a supply of shielding gas which forms an arc atmosphere is controlled, or a flow of fume is controlled through a fume exhaust device, as a function of the measured value.
    Type: Grant
    Filed: January 7, 1976
    Date of Patent: June 13, 1978
    Assignee: Osaka Denki Co., Ltd.
    Inventors: Fumio Ueyama, Takao Yoshimitsu
  • Patent number: 4091255
    Abstract: In electrodes for seam welding machines and the like, electric current paths from a transformer to an electrode shaft are established not as through an electrode frame, cover plate and others, but directly through contact means which is connected at one end thereof to the transformer and abuts at another end upon a free end of the electrode shaft coaxially thereof.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: May 23, 1978
    Assignee: Sanki Kogyo Kabushiki Kaisha
    Inventor: Mamoru Yamamoto
  • Patent number: 4091253
    Abstract: Methods of hard facing iron or steel articles by a submerged arc welding process are described. Specifically, an iron or steel rolling mill roll arbor is hard faced by rotating the arbor about its longitudinal axis and traversing a welding head parallel to said axis to deposit a spiral bead of weld metal on the arbor for subsequent heat treatment and machining. Different consumable electrodes and fluxes are chosen to deposit a desired hard facing on the arbor.
    Type: Grant
    Filed: March 5, 1976
    Date of Patent: May 23, 1978
    Assignee: British Steel Corporation
    Inventors: Trevor Bagshaw, John McCann
  • Patent number: 4090058
    Abstract: In apparatus for resistance-heating elongated workpieces by direct passage of current therethrough, a device for displacing the elongated workpieces longitudinally into and out of the apparatus includes rail means providing a transporting surface into and out of the apparatus, electrode carriers having rollers rollably supporting the electrode carriers on the rail means, and drive means for driving the electrode carriers along the rail means in axial direction of a respective workpiece.
    Type: Grant
    Filed: April 26, 1976
    Date of Patent: May 16, 1978
    Assignee: Brown, Boveri & Cie Aktiengesellschaft
    Inventors: Werner Kielhorn, Gerhard Heyduk, Otto Hochstrasser
  • Patent number: 4086464
    Abstract: In a device for resistance heating of an elongated, generally cylindrical metal workpiece preparatory to quench hardening wherein the workpiece has a central, elongated axis and axially spaced first and second ends. The heating device includes first and second axially spaced electrode means for directing electrical current through the workpiece and between the spaced ends as the workpiece is supported in a selected, generally horizontal heating position. The improved feeding arrangement includes a transfer element with first and second separate nest means for supporting a workpiece with its axis generally parallel to the heating position. The second nest means is spaced horizontally from the loading position. This transfer element is reciprocally mounted for movement between a first location with a workpiece in the first nest means at the heating position and a second location with the first nest means being spaced from the heating position.
    Type: Grant
    Filed: July 20, 1976
    Date of Patent: April 25, 1978
    Assignee: Park-Ohio Industries, Inc.
    Inventors: Paul L. Day, George M. Mucha
  • Patent number: 4086463
    Abstract: A flux-cored wire for electrogas arc welding includes a sheath of steel hoop made of material selected from a group of materials consisting of mild steel and stainless steel. A flux is provided internally within the coating. The flux contains CaF.sub.2, Fe--Si, SiO.sub.2, CaCO.sub.3, Cr and Mn. The flux may also contain Fe, Fe--Nb, Me--Mo and/or Me--Cu.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: April 25, 1978
    Assignee: Tsukishima Kikai Co., Ltd.
    Inventors: Jimpei Omori, Mitsuo Kono, Torataro Takeuchi, Noboru Oikawa
  • Patent number: 4085307
    Abstract: A weldable fastener for supporting insulation adjacent to a surface and apparatus for welding the fastener are provided. The insulation fastener is specifically designed for applying insulating material to the outer surface of a wall of a cryogenic container, which walls are commonly made of aluminum. The fastener includes, in the preferred form, an aluminum stud having a weldable end and a recess at the opposite end. A strong plastic-glass fiber rod, which is preferably made by a pultrusion process, is affixed in the recess of the stud and extends outwardly therefrom, coaxially with the stud. After the insulation is placed over the rod and stud and against the surface, a suitable clip or washer is applied over the end of the rod to hold the insulation in place. The apparatus for welding the stud to the surface includes a stud welding tool which operates by a known end-welding technique. The tool has a chuck leg terminating in an offset member holding a chuck at one side of the tool.
    Type: Grant
    Filed: March 2, 1976
    Date of Patent: April 18, 1978
    Assignee: TRW Inc.
    Inventor: John C. Jenkins
  • Patent number: 4081644
    Abstract: An electrical contact material which consists of at least one material selected from a first group which comprises any one of the precious metals, gold, palladium, ruthenium, rhodium and rhenium or their alloys and the silver/palladium series of contact alloys; and not more than three weight per cent of at least one material selected from a second group which comprises lithium, sodium, sodium chloride, potassium compounds, rubidium, caesium and cadmium sulphide spread uniformly throughout, or formed at discrete sites at the surface of, the said at least one material of the first group.
    Type: Grant
    Filed: October 9, 1975
    Date of Patent: March 28, 1978
    Assignee: Plessey Handel Investments A.G.
    Inventor: Terrence Ardern Davies