Sectional Patents (Class 373/91)
  • Patent number: 9958094
    Abstract: A method and system certifies a joint between a first threaded element having a first shoulder and a second threaded element having a second shoulder and the equipment used to tighten the connection. The method tightens to a first position at which the first shoulder abuts the second shoulder. Marks are made that are aligned across the first element and the second element corresponding to the first position. The connection is loosened and then tightened to a second position complying with a predetermined tightening specification. The distance beyond the marks for the first position is measured to verify that it is within acceptable tolerances. If acceptable the connection and/or the tightening equipment can be certified.
    Type: Grant
    Filed: October 16, 2013
    Date of Patent: May 1, 2018
    Inventor: Don Darrell Hickman
  • Patent number: 9844104
    Abstract: An electrode joining apparatus for joining a free electrode to a fixed electrode, the fixed electrode having a top end. The apparatus can include an electrode holder configured to selectively hold the fixed electrode. A torque device can be positioned above the electrode holder, the torque device configured to grip and spin the free electrode to join the free electrode to the fixed electrode. A blowout jet can be oriented to selectively force a stream of gas toward the top end of the fixed electrode when the fixed electrode is held by the electrode holder. As such, the blowout jet can help remove dust, debris, or graphite residue on the top end of the fixed electrode before joining of the free electrode to the fixed electrode. The fixed electrode can include a threaded socket, the blow jet oriented to force the stream of gas toward the threaded socket.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: December 12, 2017
    Assignee: Contractors & Industrial Supply Company, Inc.
    Inventor: Tom D. Schiller
  • Patent number: 9537206
    Abstract: A force-applying element for fixing radomes provides an annular flange region. The force-applying element provides at least one fixing region, which extends from the flange region in the direction towards the radome to be fixed, and its outer surfaces are surrounded by the radome in a form-fit manner.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: January 3, 2017
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventors: Anton Berger, G√ľnter Neumann
  • Patent number: 8923360
    Abstract: A graphite electrode exhibits oxidation resistance by modifying the outer radial surface characteristics. The outer radial surface may be modified by providing a textured portion which improves water flow while minimizing water absorbtion. Alternately, a layer of flexible graphite or plurality of particles of exfoliated graphite may be disposed on the outer radial surface of the electrode body.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: December 30, 2014
    Assignee: GrafTech International Holdings Inc.
    Inventors: Philip Dennis Coleman, Michael Frastaci, Gregory E. Murray, Marco Napolitano, Aaron Tomasek, Brian Bowman, Daniel W. Krassowski
  • Patent number: 8837552
    Abstract: A sealing device is arranged around a rod electrode extending vertically through an aperture made in the ceiling of an arc furnace and being vertically movable inside the furnace to prevent the access of gases from the furnace through the aperture to the atmosphere, and on the other hand to prevent air from flowing from the atmosphere into the furnace. The sealing device comprises a gas distribution chamber provided with an inlet channel for feeding essentially passive gas, such as nitrogen or air, into the gas distribution chamber. The sealing device also includes a slit nozzle encasing the electrode, through which nozzle a gas jet is arranged to be discharged from the gas distribution chamber towards the electrode in a direction that is at an angle with respect to the horizontal plane and has a slightly upwards inclined orientation, and that is, with respect to the furnace interior, pointed outwardly, so that the sealing is carried out owing to the effect of the created stagnation pressure.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: September 16, 2014
    Assignee: Outotec Oyj
    Inventors: Jiliang Xia, Tapio Ahokainen, Risto Saarinen
  • Publication number: 20130279534
    Abstract: A graphite electrode exhibits oxidation resistance by modifying the outer radial surface characteristics. The outer radial surface may be modified by providing a textured portion which improves water flow while minimizing water absorbtion. Alternately, a layer of flexible graphite or plurality of particles of exfoliated graphite may be disposed on the outer radial surface of the electrode body.
    Type: Application
    Filed: April 10, 2013
    Publication date: October 24, 2013
    Applicant: GRAFTECH INTERNATIONAL HOLDINGS INC.
    Inventors: Philip Dennis Coleman, Michael Frastaci, Gregory E. Murray, Marco Napolitano, Aaron Tomasek, Brian Bowman, Daniel W. Krassowski
  • Patent number: 8395070
    Abstract: Some embodiments relate to an electrical contact assembly for a plasma torch tip, and may include an electrical contact portion, a compressible portion in mechanical communication with the contact, and a mounting portion in mechanical communication with the compressible portion. Some embodiments may be adapted to maintain contact with an uneven substrate during translation of the torch tip.
    Type: Grant
    Filed: April 1, 2010
    Date of Patent: March 12, 2013
    Assignee: American Torch Tip
    Inventors: Matt Merrill, Jeffrey Walters, Sr.
  • Publication number: 20110194582
    Abstract: A pin for use in connecting graphite electrodes into a joint, where the pin has at least one male tang having a tang factor, defined as the ratio of male tang length to diameter of the electrode into which hit is to be threaded, of at least about 1.0.
    Type: Application
    Filed: June 18, 2010
    Publication date: August 11, 2011
    Inventors: Robert E. Smith, Lionel D. Burton Batty, Philip D. Coleman
  • Publication number: 20080304537
    Abstract: Carbon electrodes have at least one socket with an internal thread to be mated with a threaded pin having at least one external thread. Also such a threaded pin is provided for connecting to such carbon electrodes. The internal thread or external thread of the carbon electrodes and/or the pins are provided with non-load bearing abutment thread windings.
    Type: Application
    Filed: July 14, 2008
    Publication date: December 11, 2008
    Applicant: SGL CARBON AG
    Inventor: John Montminy
  • Patent number: 7352792
    Abstract: A joint for connecting two carbon members, with at least one carbon member having an asymmetrical coefficient of thermal expansion. The carbon member having the asymmetrical coefficient of thermal expansion also has either a male tang or a female socket with an elliptical cross section selectively oriented to the asymmetrical coefficient of thermal expansion.
    Type: Grant
    Filed: October 24, 2005
    Date of Patent: April 1, 2008
    Assignee: Graftech International Holdings Inc.
    Inventor: Robert E. Smith
  • Patent number: 7230969
    Abstract: An electrode joint having first and second complementary elements capable of being joined together to form the joint, wherein one of the threaded elements has at least one slot at least partially along its length; and wherein one of the threaded elements includes a source of a flowable adhesive in fluid communication with the slot.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: June 12, 2007
    Assignee: UCAR Carbon Company Inc.
    Inventors: Mark Segger, James J. Pavlisin
  • Patent number: 6925104
    Abstract: Electrode columns made from carbon and graphite are screwed together from individual elements, for example, the electrodes and nipples. The elements have directionally structured contact surfaces. Such a structure of the contact surfaces gives rise to the elements of a column demonstrating increased resistance to loosening after intensive machine screwing or screwing applied by hand, which, therefore, is often inadequate, whereby a higher level of operational reliability is achieved, in particular, in the case of electrode columns that are screwed together by hand.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: August 2, 2005
    Assignee: SGL Carbon AG
    Inventors: Stefan Baumann, Karl Wimmer
  • Patent number: 6377603
    Abstract: A system is disclosed for assembling a composite, self-baking electrode for electric arc furnaces. The electrode includes an outer metal ferrule, a central column of prebaked carbon or graphite sections assembled by nipples. New sections are added to the column from carbon paste placed between the ferrule and the central column. The assembling system principally includes a support that is vertically mobile over a length greater than the length of each of the sections. The support suspends the central column. A device is provided for temporarily blocking the column and a clamping device applies a preset torque to a newly added section while the blocking device temporarily blocks the column from movement thereby screwing the newly added section to an adjacently positioned section of the column.
    Type: Grant
    Filed: July 25, 2000
    Date of Patent: April 23, 2002
    Assignee: Invensil
    Inventor: Raymond Delorme
  • Patent number: 6075806
    Abstract: In an arc furnace or melter furnace employing concentric graphite inner and outer electrodes, the accumulations of tolerances, distortion and mechanical forces can cause a loss of concentricity leading to reduced performance and eventually to electrode degradation. To avoid that condition, a plurality of insulating spherical or cylindrical spacers are disposed in the annular gap between the inner and outer electrodes. The spacers are held in position by arcuate recesses in the outer surface of the inner electrode or in the inner surface of the outer electrode. The electrodes may be constructed in segments that are assembled by threading one segment into another segment.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: June 13, 2000
    Assignees: Electro-Pyrolysis Inc, Svedala Industries Inc.
    Inventors: J. Kenneth Wittle, Richard A. Hamilton, Peter James Wilver
  • Patent number: 5870424
    Abstract: In order to prevent the rupturing of a graphite electrode comprising electrode sections joined with one another by a socket and a nipple, electrical insulating material is applied on the joined surfaces to decrease the current across the nipple.
    Type: Grant
    Filed: June 20, 1996
    Date of Patent: February 9, 1999
    Assignee: Showa Denko Kabushikikaisha
    Inventors: Masao Todoriki, Takayuki Fukai, Yoshishige Sekiguchi, Osamu Kanazawa, Hiroyuki Yamashita
  • Patent number: 5854807
    Abstract: The self-baking electrode suitable for use in an electric arc furnace comprises an elongated open ended electrically conductive casing for extending generally vertically within the furnace. A central core made of a heat conductive material is disposed within and spaced from the casing. A framework within is securing the central core to an inner surface of the casing for holding centrally the central core within the casing and for preventing an extrusion of the central core downward. The central core is surrounded by a carbonaceous electrode paste devised to cure into a solid electrode upon heating and to bond to the central core. This self-baking electrode allows the production of silicon metal in a Soderberg-type furnace without any modification to the usual slipping system or addition of another slipping system.
    Type: Grant
    Filed: October 27, 1997
    Date of Patent: December 29, 1998
    Assignee: SKW Canada Inc.
    Inventors: Rene Boisvert, Jacques Dostaler, Jacques Dubois, Dieter W. Ksinsik
  • Patent number: 5575582
    Abstract: Electrode joint for threadably joining two abutting carbon upper and lower electrode sections is provided with a locking pin releasably held in an upper electrode section which when released engages a groove in a lower electrode section.
    Type: Grant
    Filed: January 18, 1995
    Date of Patent: November 19, 1996
    Assignee: UCAR Carbon Technology Corporation
    Inventors: Michael Frastaci, Richard T. Lewis, David G. Proctor, David M. Riffle
  • Patent number: 5577065
    Abstract: A device for mounting a self-baking composite electrode for an electric arc furnace, which includes a hollow metallic shell, a central column of graphite or pre-baked carbon comprising a plurality of elements fitted together by means of nipples. A carbonaceous paste is disposed between the shell and the column. The column is suspended from a support which is movable in a vertical direction with respect to the shell, along a length which is greater than the length of each of the elements. The invention is particularly relevant to furnaces for the production of silicon by carbothermic means.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: November 19, 1996
    Assignee: Pechiney Electrometallurgie
    Inventor: Maurice Sales
  • Patent number: 5336015
    Abstract: Threaded nipple for joining two electrode sections is provided with an integral ridge intermediate its threads for centering the electrodes in coaxial alignment.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: August 9, 1994
    Assignee: Ucar Carbon Technology Corporation
    Inventors: James R. Stewart, James A. Klotz, Crescenzo F. Fulgenzi, Philip D. Coleman
  • Patent number: 5117439
    Abstract: The electric furnace operating cycle time is substantially reduced by directing water into the porous pack of carbonaceous material surrounding the electrodes at a water rate adjusted to maximize vaporization of water into steam within the porous pack while allowing the steam to escape without contacting the electrodes.
    Type: Grant
    Filed: March 29, 1991
    Date of Patent: May 26, 1992
    Assignee: Ucar Carbon Technology Corporation
    Inventors: Frank J. Dagata, Kenneth G. Politowicz
  • Patent number: 5015518
    Abstract: A graphite body which is capable of connecting a plurality of the graphite bodies one by one. The graphite body includes one connecting end surface having a T-shaped mound and the other connecting end surface having an inverted T-shaped groove so that the graphite bodies may be connected by means of the mound and groove. The mound and groove each have a width linearly varied in the longitudinal direction thereof.
    Type: Grant
    Filed: May 30, 1989
    Date of Patent: May 14, 1991
    Assignee: Toyo Carbon Co., Ltd.
    Inventors: Yoshito Sasaki, Kunio Takaishi
  • Patent number: 4853942
    Abstract: Graphite consumable electrode for electric arc furnaces and the like, which comprises a plurality of essentially similar graphite sections and coupled one to the other by means of threaded connections, wherein each section is provided with cooling conduits formed into it, through which a cooling fluid flows fed only through the upper portion of the electrode from a distributing header with the lower tip portion of the electrode being automatically isolated from the cooling fluid flow.
    Type: Grant
    Filed: August 5, 1987
    Date of Patent: August 1, 1989
    Assignee: Hylsa, S.A. De C.V.
    Inventor: Juan Celada-Salmon
  • Patent number: 4737256
    Abstract: A laminated carbon cathode includes two layers of carbon blocks, i.e. and the upper layer of graphite of graphitised carbon, and a lower layer of a cheaper anthracite carbon. The two layers are so displaced with respect to one another that there are no vertical seams leading straight from the upper surface of the carbon cathode to the its underside. Dividing the cathode into two horizontal layers is combined with the embedding of current-carrying steel conductors in precise grooves between the layers. In order to capitalize on the good electrical conductivity of aluminum, an aluminum extension is friction-welded to each steel conductor as close to a shell enclosing the cathode while at the same time a collar is formed which provides an air-tight seal at the point where the cathode bar enters the side of the shell.
    Type: Grant
    Filed: October 22, 1986
    Date of Patent: April 12, 1988
    Assignee: Ardal og Sunndal Verk a.s.
    Inventors: Stein Vikersveen, Johnny Torvund
  • Patent number: 4703492
    Abstract: The present invention relates to joined carbon electrodes, each of which has a mark formed on such a part of the circumferential surface of each of the first and second carbon electrodes that upon the coinciding of the marks with one another the ends of the screws essentially coincide with one another.
    Type: Grant
    Filed: August 3, 1984
    Date of Patent: October 27, 1987
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Yoshishige Sekiguchi, Tomiyasu Kubota
  • Patent number: 4691324
    Abstract: Connection between the sections of a graphite electrode in whose faces a socket is sunk to accommodate a threaded nipple. The socket base has a rotation-symmetrical recess whose principal sections are defined by a second or higher order curves and go over into the socket generating surface continuously differentiably. The annular stress active in the connection zone is reduced in particular by the recess.
    Type: Grant
    Filed: February 26, 1986
    Date of Patent: September 1, 1987
    Assignee: Sigri GmbH
    Inventor: Gunter Kraus
  • Patent number: 4689799
    Abstract: A water-cooled electrode for an electric arc furnace is fitted with a copper nipple 10, increased surface area through fluting or drilled or threaded passages for vastly improved cooling, joining the water-cooled and graphite portions of the electrode.
    Type: Grant
    Filed: September 27, 1985
    Date of Patent: August 25, 1987
    Inventors: Berch Y. Karagoz, Lyman T. Moore, Joseph M. Rua, Mark D. Travers, Donald P. Allen
  • Patent number: 4679206
    Abstract: The probability of thread damage during the joining of carbon or graphite electrodes having tapered threaded projections or sockets is reduced by an improved thread configuration wherein the thread crest angle is less than the taper angle of the threaded projection or socket. In the preferred embodiment the thread crest is essentially parallel to the electrode axis.
    Type: Grant
    Filed: June 17, 1986
    Date of Patent: July 7, 1987
    Assignee: Union Carbide Corporation
    Inventor: William H. Burwell
  • Patent number: 4659442
    Abstract: Carbon losses are reduced in that an operative carbon anode is glued beneath a carbon core in an inert anode top. The operative anode carbon is almost completely consumed. The anode top is then cleaned and a new operative carbon is glued to its underside.
    Type: Grant
    Filed: January 23, 1985
    Date of Patent: April 21, 1987
    Assignee: .ANG.rdal og Sunndal Verk AS
    Inventors: Tormod Naterstad, Knut Bergli, Jan Hurlen
  • Patent number: 4623250
    Abstract: Improvements on a DC plasma jet generator for emission spectrochemical analysis wherein two anode blocks and one cathode block are positioned in an inverted Y shape, and each of the anode blocks has a cylinder, a piston, an an anode received by a recess in the end of the piston. Each anode can be secured in the recess at the end of the piston in the corresponding anode block by magnetic force. Each of the anode and cathode blocks is pivotable so that the associated electrode attached to each block can be fixed upright with the free end thereof directed upward. This means that the electrodes can be replaced easily as well as speedily by remote control using manipulators.
    Type: Grant
    Filed: September 7, 1983
    Date of Patent: November 18, 1986
    Assignee: Doryokuro Kakunenryo Kaihatsu Jigyodan
    Inventors: Koichi Onishi, Takashi Suganuma
  • Patent number: 4594722
    Abstract: Graphite electrode for arc furnaces composed of a plurality of graphite electrode parts comprising a plurality of electrode sections connected by threaded graphite nipples, wherein at least one part of a graphite electrode has a plurality of graphite-filament yarn tensionally connected to the electrode part.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: June 10, 1986
    Assignee: Sigri GmbH
    Inventor: Horst Boder
  • Patent number: 4490825
    Abstract: A water-cooled arc furnace electrode includes a hollow metallic jacket having a cylindrical wall portion supported in spaced relation from a graphite electrode. A shell is spaced from and surrounds the wall portion and has a section extending below the wall portion and upwardly into engagement with the lower end thereof. A baffle is disposed between the wall portion and the shell to define a first cooling fluide passage for water flowed downwardly between the shell and the baffle and a second passage extending upwardly between the baffle and the wall portion. A plurality of spaced electrical contact members are mounted on the lower portion of the shell and are in pressure engagement with the electrode. The shell and the contacts provide a current path around a proportion of the electrode for increased conductivity and to minimize electrode oxidation.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: December 25, 1984
    Assignee: Lectromelt Corporation
    Inventor: John A. Persson
  • Patent number: 4474613
    Abstract: An electrode for fusion electrolysis comprising an upper portion (5) of metal and a replaceable lower portion (6) of self-consuming or of slowly self-consuming material which are interconnected by a screw-nipple (1) or the like, whereby the upper portion may have a cooling device with a feed duct (2) and a return duct (3) and the upper portion (5) has at least partially and preferably in its lower region a protective covering, whereby this covering is a detachably surmounted sheath (4) of mechanically resistant material, which is electrically conductive. The sheath can be sub-divided into individual segments, while the design of screw-mounted units with internal recesses for the acceptance of resilient, electrically conductive materials reveals especially favorable properties.
    Type: Grant
    Filed: January 25, 1982
    Date of Patent: October 2, 1984
    Assignee: C. Conradty Nurnberg GmbH & Co. KG
    Inventors: Dieter H. Zollner, Friedrich Rittmann, Inge Lauterbach-Dammler, Konrad Koziol, Christine Zollner
  • Patent number: 4435816
    Abstract: Taper thread joints in carbon or graphite electrode columns are protected from thread damage during assembly by use of a consumable centering pin to assure axial alignment of the mating parts, thereby preventing thread damage and resulting thread debris from forming and interfering with the proper fit of the mating parts forming the joint.
    Type: Grant
    Filed: June 30, 1982
    Date of Patent: March 6, 1984
    Assignee: Union Carbide Corporation
    Inventors: Herman M. Belz, Harry C. Stieber
  • Patent number: 4357485
    Abstract: A steel treatment system includes a ladle having a cover, a heating electrode mounted to extend through an opening in the cover, a casing surrounding the electrode and including lower, intermediate and upper sections, and a seal mounted at the cover about the opening for forming a seal with the lower section of the casing. A clamp device is mounted on the intermediate section of the casing and extends therethrough for clamping the electrode and for fixing the relative axial position of the electrod with respect to the casing. An actuator is fixedly supported at a level above the clamp device and is operatively connected to the casing to move the casing and the electrode downwardly. First guide rollers act on the lower section of the casing, and second guide rollers act on the upper section of the casing for ensuring axial movement of the casing and electrode.
    Type: Grant
    Filed: May 29, 1980
    Date of Patent: November 2, 1982
    Assignee: Heurtey Metallurgie
    Inventor: Gabriel Lamarque
  • Patent number: 4349910
    Abstract: The proper assembly of electrode sections is facilitated by placing orientation match-marks on the electrode ends, which marks are lined up at the time of the assembly. Placing of the marks is done with marking gauges and the location is predetermined with reference to the pitch of the socket threads.
    Type: Grant
    Filed: September 28, 1979
    Date of Patent: September 14, 1982
    Assignee: Union Carbide Corporation
    Inventor: Herman M. Belz