Alloys Patents (Class 200/266)
  • Patent number: 10312003
    Abstract: A circuit board for an electronic device includes pattern areas on both sides of the circuit board. Each end of a thermistor is electrically connected to electrically conductive pads on pattern areas on the top and bottom sides of the circuit board. An input plug is electrically connected to an end of the thermistor. The input plug is electrically connected to the thermistor by way of an input connector to which the circuit board is inserted.
    Type: Grant
    Filed: December 22, 2016
    Date of Patent: June 4, 2019
    Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
    Inventors: BongGeun Chung, YoonJoo You
  • Patent number: 10096923
    Abstract: An electric contact for preventing a terminal of an electric part and the electric contact from sticking to each other after a continuity test to improve the durability of the electric contact; and a socket for electric parts using the electric contact. The electric contact of this invention includes a first layer made from a material into which Sn melts and diffuses upon application of heat; and a second layer formed on the outer side of the first layer and made from a material lower in the rate at which Sn melts and diffuses upon application of heat than the first layer.
    Type: Grant
    Filed: May 28, 2013
    Date of Patent: October 9, 2018
    Assignee: ENPLAS CORPORATION
    Inventor: Takahiro Oda
  • Patent number: 9959986
    Abstract: A method for producing an electrode material, provided to involve: (i) a provisional sintering step of sintering a mixed powder containing a powder of a heat resistant element and a powder of Cr to obtain a solid solution where the heat resistant element and Cr are dissolved; (ii) a pulverizing step of pulverizing the solid solution to obtain a powder; (iii) a main sintering step of sintering a molded body obtained by molding the powder of the solid solution, to produce a sintered body; and (iv) a Cu infiltration step of infiltrating the sintered body with Cu.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: May 1, 2018
    Assignee: MEIDENSHA CORPORATION
    Inventors: Kaoru Kitakizaki, Keita Ishikawa, Shota Hayashi, Nobutaka Suzuki, Kosuke Hasegawa
  • Patent number: 9928971
    Abstract: An electrical contact tip for switching applications. The contact tip includes a body having a first layer and a second layer. The first layer arranged on the second layer and adapted to come in contact with a corresponding contact tip during switching operations. The first and second layers consist of Ag-composites of one or more elements, compounds or alloys, where the hardness of the first layer is lower than the hardness of the second layer.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: March 27, 2018
    Assignee: ABB Schweiz AG
    Inventors: Gunnar Johansson, David Karlén, Erik Johansson, Reinhard Simon
  • Patent number: 9881737
    Abstract: A laminated ceramic electronic component that includes a laminated body formed by laminating a ceramic layer and an internal electrode; and an external electrode formed on an outer surface of the laminated body so as to be electrically connected to the internal electrode. The external electrode includes a conducting layer that is in contact with the internal electrode, and the internal electrode contains Ni. The conducting layer contains metal particles containing a Cu3Sn alloy, and a thermosetting resin. The metal particles contain Sn in a weight ratio of 36.5 to 47.8% to the total amount of Sn and Cu.
    Type: Grant
    Filed: June 11, 2015
    Date of Patent: January 30, 2018
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Shinji Otani
  • Patent number: 9875869
    Abstract: The disclosed concept pertains to vacuum interrupters and arc-resistant shields. The arc-resistant shields are positioned in between a ceramic insulator. Each end of the arc-resistant shield is hermetically sealed to the ceramic insulator. The arc-resistant shield includes an outer surface and an inner surface. The inner surface includes an arc-resistant material. Disposed within the arc-resistant shield is a pair of electrode assemblies which are separable to establish arcing. In certain embodiments, the arc-resistant material is copper-chromium alloy.
    Type: Grant
    Filed: October 13, 2014
    Date of Patent: January 23, 2018
    Assignee: EATON CORPORATION
    Inventors: Louis Grant Campbell, Eric Dennis Smith, Franklin Willis Freeborn
  • Patent number: 9724759
    Abstract: A method for producing an electrode material, involving: (i) a step of preparing a powder of a solid solution of Cr and a heat resistant material selected from the group consisting of Mo, W, Ta, Nb, V and Zr, wherein either a peak corresponding to Cr element or a peak corresponding to the heat resistant element, which are observed by X ray diffraction measurement made on the powder of the solid solution, disappears; (ii) a step of molding the powder of the solid solution to obtain a molded body and then sintering the molded body to produce a sintered body; and (iii) a Cu infiltration step of infiltrating the sintered body with Cu.
    Type: Grant
    Filed: February 17, 2015
    Date of Patent: August 8, 2017
    Assignee: MEIDENSHA CORPORATION
    Inventors: Kaoru Kitakizaki, Keita Ishikawa, Shota Hayashi, Nobutaka Suzuki, Kosuke Hasegawa
  • Patent number: 9472361
    Abstract: An improved printed circuit board contacts that are used to implement switch contacts of keypads and keyboards combining gold and silver plating over copper conductors. In the preferred embodiment of FIG. 5 shows a cross section of the printed circuit board 14 and the switch contact 20, where the switch contact material is electrolysis immersion silver layer 26 plated onto copper layer 22 and an electrolysis immersion gold layer 28 plated over that. An alternate embodiment is shown in FIG. 4 of a printed circuit board 14 with a switch contact 20, wherein a layer of nickel 24 is plated over the copper layer 22, then the silver layer 26 is plated onto the nickel 24, then the gold layer 28 is the topmost layer. Here the nickel layer is used to prevent copper migration into the other layers.
    Type: Grant
    Filed: October 7, 2014
    Date of Patent: October 18, 2016
    Assignee: ES Beta, Inc.
    Inventor: Peter J. Mikan
  • Patent number: 9460883
    Abstract: A temperature fuse includes a cylindrical metal case, a sliding electrode slidable over an inner surface of the metal case, and a terminal electrically connected to the metal case while the sliding electrode is in contact therewith, during activation, the sliding electrode moving away from the terminal so that electrical connection between the metal case and the terminal is cut off, the sliding electrode being formed by working a thin metal plate, the sliding electrode including at least a base material layer composed of copper or a copper alloy and a first surface layer composed of silver or a silver alloy, and a site of contact with the terminal being the first surface layer having a thickness not smaller than 5 ?m.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: October 4, 2016
    Assignee: NEC SCHOTT Components Corporation
    Inventor: Tokihiro Yoshikawa
  • Publication number: 20150083558
    Abstract: An electrical contact is disclosed. The electrical contact includes a first element of a first material having one or more aperture, and a second element of a second material, the second element being positioned in at least one aperture of the one or more aperture of the first element, wherein the second material is different from the first material. Electrical contact devices, assemblies, and methods are provided, as are other aspects.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: SIEMENS INDUSTRY, INC.
    Inventors: Hector Manuel Malacara-Carrillo, Thomas William Holland, Oscar Rodrigo Ollervides Madrigal
  • Publication number: 20140166451
    Abstract: A touch module includes a transparent substrate, a shield layer, a touch electrode layer, a transparent insulation layer and a lead layer. The shield layer is coated on the transparent substrate. The touch electrode layer is coated on both the transparent substrate and the shield layer. The transparent insulation layer is disposed on the touch electrode layer and formed with at least one through hole. The lead layer is disposed on the transparent insulation layer and formed with a conduction section positioned in the through hole in electrical connection with the touch electrode layer. Therefore, the lead layer can directly electrically connect with the touch electrode layer through the through hole of the transparent insulation layer. Accordingly, the cost for the optical mask design and the lithographic and etching processes can be saved and the problem that the transparent substrates often fail to fully attach is eliminated.
    Type: Application
    Filed: February 6, 2013
    Publication date: June 19, 2014
    Inventor: Chih-Chung Lin
  • Patent number: 8697247
    Abstract: The invention discloses a semi-finished product for making plug-in contacts in plug-in connectors for electric DC power systems in motor vehicles which are operated at a nominal voltage at which electric arcing may occur, having an electrically conductive main body made of a non-precious metallic material that carries, at least in part, a contact-making coating of a material more precious than the material of the main body. It is provided according to the invention that the coating has thickness of at least 0.3 ?m and consists of silver or of a silver-based alloy with an addition that will not form an alloy with silver or with the silver-based alloy, or will at best form a precipitation alloy, and which has a higher melting point than silver.
    Type: Grant
    Filed: April 17, 2004
    Date of Patent: April 15, 2014
    Assignee: Doduco GmbH
    Inventors: Franz Kaspar, Joachim Ganz, Isabell Buresch
  • Patent number: 8524376
    Abstract: In an Sn-plated strip in which a copper alloy containing 15 to 40 mass % of Zn in terms of an average concentration is used as an alloy strip and the layers of an Sn phase, an Sn—Cu alloy phase and an Ni phase constitute a plating film from the surface to the alloy strip, the Zn concentration of the surface of the Sn phase is adjusted to a range of 0.1 to 5.0 mass %. The alloy may further contain 0.005 to 3.0 mass % in total of an arbitrary constituent selected from Sn, Ag, Pb, Fe, Ni, Mn, Si, Al and Ti. Moreover, the alloy may be a copper base alloy containing 15 to 40 mass % of Zn, 8 to 20 mass % of Ni, 0 to 0.5 mass % of Mn and a balance of Cu and unavoidable impurities, and may further contain 0.005 to 10 mass % in total of the above arbitrary constituent. There is provided a Cu/Ni double layer base reflowed Sn-plated Cu—Zn alloy strip in which generation of whiskers is suppressed.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: September 3, 2013
    Assignee: JX Nippon Mining & Metals Corporation
    Inventor: Takaaki Hatano
  • Publication number: 20120255843
    Abstract: A switching arrangement having a plurality of electrical contacts configured for high speed electromechanical power switching applications such as transfer switches and circuit breakers. Contacts that contact one another when closed can include snubber portions or parallel snubber contacts that vary in resistance during sliding contact travel. One snubbering switching arrangement includes a first pair of snubbing contacts in parallel with a first pair of electrical contacts where the snubbing contacts make sliding contact before the electrical contacts when the load is being connected to one power source and a second pair of snubbing contacts in parallel with a second pair of electrical contact where the snubbing contacts make contact before the electrical contacts when the load is being connected to a second power source. One such switching arrangement includes the snubber or snubbing contact formed of a brush of electrically conductive bristles.
    Type: Application
    Filed: March 13, 2012
    Publication date: October 11, 2012
    Inventor: Elliot Brooks
  • Patent number: 8187395
    Abstract: Disclosed is an electrical contact having high electrical conductivity for a compact electromagnetic relay including an internally oxidized silver-oxide material which is prepared by subjecting an Ag alloy having a composition consisting essentially of, by weight, 5.1 to 9% Sn, 1.5 to 5% In, and 0.005 to 0.06% Bi, with the balance being Ag and unavoidable impurities, to an internal oxidation treatment and then subjecting to a heat treatment for diffusion, aggregation, and growth of precipitated oxides, wherein the internally oxidized silver-oxide material has a metallographic structure such that coarse grains of composite oxides are dispersed and distributed in an Ag matrix, the coarse grains of composite oxides being formed as a result of coarsening of ultra-fine grains of Sn-based oxides and ultra-fine grains of In-based oxides, which are precipitated by the internal oxidation treatment, by the heat treatment for diffusion, aggregation, and growth of the precipitated oxides.
    Type: Grant
    Filed: August 6, 2004
    Date of Patent: May 29, 2012
    Assignee: Mitsubishi Materials C.M.I. Corporation
    Inventors: Yuzo Uemura, Koshiro Ueda, Noriaki Murahashi, Shinji Yamanashi, Michio Taki, Hiroyasu Endo
  • Patent number: 7812703
    Abstract: A material for forming a conductive structure for a MEMS device is described, which is an alloy containing about 0.01% manganese and the remainder nickel. Data shows that the alloy possesses advantageous mechanical and electrical properties. In particular, the sheet resistance of the alloy is actually lower than the sheet resistance of the pure metal. In addition, the alloy may have superior creep and higher recrystallization temperature than the pure metal. It is hypothesized that these advantageous material properties are a result of the larger grain structure existing in the NiMn alloy film compared to the pure nickel metal film. These properties may make the alloy appropriate for applications such as MEMS thermal electrical switches for telecommunications applications.
    Type: Grant
    Filed: March 23, 2006
    Date of Patent: October 12, 2010
    Assignee: Innovative Micro Technology
    Inventors: Gregory A. Carlson, John S. Foster, Donald C. Liu, Douglas L. Thompson
  • Patent number: 7598832
    Abstract: Contact pad designed to be fixed on a movable contact of a low-voltage circuit breaker designed to withstand peak short-circuit currents comprised between 200 and 600 amperes per square millimeter of pad. The pad is made of a silver- or copper-based conducting material alloy, a fraction of refractory particles such as tungsten carbide, tungsten or titanium nitride and a fraction of carbon fibers. The weight percentage of carbon fibers in the pad is strictly less than 2% of the total weight of the pad.
    Type: Grant
    Filed: November 1, 2005
    Date of Patent: October 6, 2009
    Assignee: Schneider Elecric Industries SAS
    Inventors: Marc Rival, Guy Gastaldin, Jean Paul Favre Tissot, Franck Pizot
  • Patent number: 7589290
    Abstract: An electrical contact, especially an electrical contact of a plug connector, includes a metallic substrate on which a contact layer is applied in the form of a gradient layer. The gradient layer is formed by at least two elements of which one is silver and forms a matrix for the second element or forms an alloy therewith, or of which one is tin and the other is phosphorus or of which one is indium and the other is tin.
    Type: Grant
    Filed: October 2, 2003
    Date of Patent: September 15, 2009
    Assignee: Robert Bosch GmbH
    Inventors: Peter Rehbein, Volker Haas
  • Publication number: 20080217146
    Abstract: Angled spring contacts and switches made with contactors containing angled spring contacts are disclosed. The housing for the angled spring contacts has a generally cylindrical shape. The contacts are contained within the housing with their ends extending from the housing on either side. The contacts are formed by making bullet-shaped internal contacts that are joined by a spring. The spring is mounted to the two contacts to urge the two contacts away from each other at an angle to a longitudinal axis of the housing. This angle forces contact between each contact and the housing in at least two places, thus creating redundant paths between the contacts. Switches, such as plunger switches having a normal or OFF position, and an actuated or ON position, may be made with one or more angled spring contacts. The contacts have separate surfaces for electrical conduction and for arcing.
    Type: Application
    Filed: March 2, 2007
    Publication date: September 11, 2008
    Applicant: Cherry Corp.
    Inventors: Kenneth A. Albrecht, Richard W. Fitzgerald
  • Patent number: 7160632
    Abstract: The invention provides a material for sliding contacts that is suitable for a small-sized DC motor used in recent downsized CD players and is excellent in durability. A material for sliding contacts used in a commutator of a small-sized DC motor that consists essentially of 0.01 to 3.0% Ni by weight, 0.01 to 6.0% ZnO by weight and/or 0.01 to 3.0% MgO by weight, furthermore, in some cases, 0.01 to 5.0% Cu by weight, and the balance Ag, in which Ni metal particles, ZnO particles or MgO particles are dispersed in the matrix of Ag.
    Type: Grant
    Filed: November 17, 2004
    Date of Patent: January 9, 2007
    Assignees: Mabuchi Motor Co., Ltd., Tanaka Kikinzoku kogyo K.K.
    Inventors: Keiji Nakamura, Yasuhiro Hashimoto, Masahiro Takahashi, Shuichi Kubota, Takao Asada, Toshiya Yamamoto
  • Patent number: 7015406
    Abstract: An electric contact comprises a main body consisting of a copper-based alloy or of stainless steel and a contact layer consisting of a gold-based alloy. The contact layer has a thickness of at least 0.3 ?m and consists of gold with a content of 0.5 percent by weight to 15 percent by weight of one or more platinum group metals, and that an intermediate layer consisting of silver or of a silver-based alloy or of nickel is provided between the main body and the contact layer. The contact layer is preferably applied on the main body by a PVD process.
    Type: Grant
    Filed: August 2, 2002
    Date of Patent: March 21, 2006
    Assignees: Ami Doduco GmbH, Wieland Werke AG
    Inventors: Joachim Ganz, Franz Kaspar, Isabell Buresch
  • Patent number: 6974923
    Abstract: A high quality electrical contact that is made of a Cd free Ag alloy and can be applied to a breaker is provided. The electrical contact is made of an Ag alloy containing Sn and In each 1 to 9% by weight, and has a first layer as the surface layer and a second layer as an internal portion. The hardness of the first layer and the hardness of the second layer are equal to or more than 190 and equal to or less than 130, respectively, based on micro Vickers standard defined by JIS. The thickness of the first layer is within the range from 10 to 360 ?m. In particular, the electrical contact has a high quality temperature characteristic as well as a high quality welding resistance characteristic.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: December 13, 2005
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Noboru Uenishi, Norihito Goma
  • Patent number: 6740821
    Abstract: Embodiments of the invention provide thermally actuatable switches and selectively configurable circuit boards which may employ such switches. A circuit board of one embodiment includes a substrate having board leads and a plurality of electrical connectors arranged adjacent a component site. Selectively configurable circuitry may be carried by the substrate and adapted to selectively couple selected ones of the electrical connectors to selected ones of the board leads. One or more trace may be associated with each of the electrical connectors and one or more of these traces may include a thermally actuatable switch that can be selectively closed. The thermally actuatable switch may comprise a gap between two conductive lengths of the conductive trace, an exposed switch surface, and a thermally responsive member that may wet the exposed switch surface when selectively heated above an activation temperature.
    Type: Grant
    Filed: March 1, 2002
    Date of Patent: May 25, 2004
    Assignee: Micron Technology, Inc.
    Inventors: Tongbi Jiang, David Kao
  • Patent number: 6655012
    Abstract: In the fabrication of a surge protector device which utilizes breakdown phenomena of a resistive film, a case which fixes metal bars in it, makes electrical contacts with the metal bars and contains oxidizing and refractory agents, a cap, metal bars and oxidizing and refractory agents are prepared in advance. In the fabrication process of the surge protector device using these elements, a step to control the force applied to the cap, the metal bars and the case so that the force applied to the interface between the resistive films and the mechanical contacts which form electrodes to the metal bars can be controlled. Automation process to fabricate the surge protector device will be realized and efficient fabrication of the precise surge protector device will be also realized. A surge protector device whose breakdown voltage is precisely controlled will be realized reproducibly.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: December 2, 2003
    Inventor: Takashi Katoda
  • Patent number: 6638334
    Abstract: The present invention is aimed at providing a sliding contact material that has an alloy composition containing no harmful substance like Cd, especially excellent contact resistance properties, electrical functions that are good and is not subject to secular change, and abrasion resistance practically bearing comparison with conventional sliding contact materials, and is aimed at lengthening the life of a motor by the use of a sliding contact material having excellent durability as a commutator for a small direct-current motor. The present invention is a sliding contact material of an Ag—Ni-based alloy that is used in sliding part electrically switching on and off by mechanical sliding action, and the material is a sliding contact material of Ni metal particle-dispersed-type Ag—Ni-based alloy that is produced in such a method that 0.7 to 3.0 wt. % Ni powder, an additive of Li2CO3 powder corresponding to 0.01 to 0.50 wt.
    Type: Grant
    Filed: July 1, 2002
    Date of Patent: October 28, 2003
    Assignees: Mabuchi Motor Co., Ltd., Tanaka Kikinzoku Kogyo K.K.
    Inventors: Keiji Nakamura, Takemasa Honma, Yasuhiro Hashimoto, Osamu Sakaguchi, Kengo Taneichi, Toshiya Yamamoto
  • Publication number: 20030175550
    Abstract: An electrically conductive metal strip for the production of electrical contact components, in particular plug connectors, having a core strip made of a copper material and a metal facing, made of a copper-nickel-zinc alloy (nickel silver), roll-bonded clad on at least one side. The core strip possesses an electrical conductivity of at least 20 m&OHgr;/mm2. The combination of copper material and nickel silver as the metal facing yields a metal strip with high electrical conductivity whose mechanical surface properties correspond to those of nickel silver.
    Type: Application
    Filed: November 20, 1998
    Publication date: September 18, 2003
    Inventors: ALBERT RUMBACH, UDO ADLER
  • Patent number: 6350294
    Abstract: The present invention relates to powder-metallurgically produced composite material comprising a matrix of a metal with a melting point of at most 1,200° C. and a granular additive which consists of at least two refractory components embedded in said matrix, characterized in that the refractory components are present as mixed crystals or intermetallic phases. In one embodiment of the invention one or a first group of refractory component(s) has a melting point in the range of 1,500 to 2,400° C. and the second or the second group of refractory component(s) has a melting point above 2,400° C. The composite material is produced by heating a pulverized mixture of the refractory components, thus converting it into a mixed crystal or an intermetallic phase, and then combining the powder obtained by cooling and pulverizing with a metal matrix having a melting point of at most 1,200° C. by means of powder-metallurgy.
    Type: Grant
    Filed: January 25, 2000
    Date of Patent: February 26, 2002
    Assignee: Louis Renner GmbH
    Inventors: Gerd Renner, Udo Siefken
  • Publication number: 20010009724
    Abstract: Deposition of metal in a preferred shape, including coatings on parts, or stand-alone materials, and subsequent heat treatment to provide improved mechanical properties. In particular, the method gives products with relatively high yield strength. The products often have relatively high elastic modulus, and are thermally stable, maintaining the high yield strength at temperatures considerably above 25° C. This technique involves depositing a material in the presence of a selected additive, and then subjecting the deposited material to a moderate heat treatment. This moderate heat treatment differs from other commonly employed “stress relief” heat treatments in using lower temperatures and/or shorter times, preferably just enough to reorganize the material to the new, desired form. Coating and heat treating a spring-shaped substrate provides a resilient, conductive contact useful for electronic applications.
    Type: Application
    Filed: January 29, 2001
    Publication date: July 26, 2001
    Inventors: Jimmy Kuo-Wei Chen, Benjamin N. Eldridge, Thomas H. Dozier, Junjye J. Yeh, Gayle J. Herman
  • Patent number: 6210809
    Abstract: The contact material of the present invention comprises: an anti-arcing constituent consisting of at least one TiC, V and VC of which the content is 30˜70 volume % and whose mean particle (grain) size is 0.1˜9 &mgr;m; C whose content is 0.005˜0.5 weight % with respect to the anti-arcing constituent, whose diameter is 0.01˜5 &mgr;m when its shape is calculated as spherical, and which is in non-solid solution condition or condition in which it does not form a chemical compound; and a conductive constituent consisting of Cu and constituting the balance.
    Type: Grant
    Filed: December 31, 1998
    Date of Patent: April 3, 2001
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsutomu Okutomi, Atsushi Yamamoto, Iwao Ohshima, Tsuneyo Seki, Mitsutaka Homma, Takashi Kusano
  • Patent number: 6133537
    Abstract: The present invention provides an electric contact structure comprising a first contact surface and a second contact surface, wherein at least one of the first and second contact surfaces comprises an AuAgPd alloy including 7-16% by weight of Ag and 1-10% by weight of Pd, whereby a high anti-adhesion property and a highly stable contact resistance can be obtained particularly when the electric contacts are in non-operating state.
    Type: Grant
    Filed: March 23, 2000
    Date of Patent: October 17, 2000
    Assignee: NEC Corporation
    Inventors: Tokiichi Onodera, Matsujirou Ikeda
  • Patent number: 6107582
    Abstract: A vacuum valve which has a contact material having a constituent of high electrical conductivity such as Cu and an anti-arcing constituent including Cr in which particles whose particle size is in the range 0.1.about.150 .mu.m represent at least 90 volume %, and a ratio defined by the formula (.alpha..sub.900 -.alpha..sub.50).times.100/(.alpha..sub.900) for this contact material has a value of 8-12% and is the coefficient of thermal expansion of the contact material .alpha..sub.50 is the coefficient of thermal expansion of the contact material at 50.degree. C. The formation of channels generated at the interfaces of the Cr particles and the Cu matrix after undergoing the brazing step is suppressed, enabling the static withstand-voltage, contact resistance, and the breaking performance characteristics of the vacuum valve to be stabilized.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: August 22, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsutomu Okutomi, Mitsutaka Homma, Tsuneyo Seki, Atsushi Yamamoto, Takashi Kusano, Hiromichi Somei
  • Patent number: 6027821
    Abstract: A contact material for a vacuum interrupter including, a conductive component including at least Cu, and an arc-proof component including at least one selected from the group consisting of carbides of W, Zr, Hf, V and Ti. An amount of the conductive component in the contact material is 40-50 vol %, an amount of the arc-proof component in the contact material is 50-60 vol %, and a grain size of the arc-proof component is 3 .mu.m or less. A total amount of a sintering activator including at least one selected from the group consisting of Co, Fe and Ni melted in the conductive component is 0.1% or less of the amount of the conductive component.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: February 22, 2000
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Yamamoto, Tsuneyo Seki, Takashi Kusano, Tsutomu Okutomi
  • Patent number: 5985440
    Abstract: Sintered silver-iron material for electrical contacts, with properties comparable with those of silver-nickel materials, is obtained by using iron powder having more than 0.25% carbon by weight and microhardness higher than 200 HV 0.025 and sintering in a hydrogen-free protective gas.
    Type: Grant
    Filed: February 27, 1997
    Date of Patent: November 16, 1999
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Weise, Willi Malikowski, Roger Wolmer, Peter Braumann, Andreas Koffler
  • Patent number: 5973283
    Abstract: A membrane switch having a pair of flexible printed boards and a pair of contacts respectively disposed on said printed boards. The contacts are formed of powdered alloy of silver and palladium bounded by resinous material, and a conductive layer of silver powder is disposed between the flexible printed board and the contact. Preferably, the powdered alloy contains 50-97 weight percent silver and palladium in the remainder of weight percent.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: October 26, 1999
    Assignees: Denso Corporation, Hokuriku Electric Industry Co., Ltd.
    Inventors: Katsuhiko Ariga, Masayasu Teraoka, Yoshimitsu Motoki, Tetsushi Yokoe, Ichirou Ishiyama
  • Patent number: 5972068
    Abstract: The vacuum valve contact material of the present invention is manufactured by a step of mixing an anti-arc constituent powder and a conductive constituent powder, a step of forming, and a step of sintering the formed body below the melting point of the conductive constituent, and has improved arc interruption performance.
    Type: Grant
    Filed: March 6, 1998
    Date of Patent: October 26, 1999
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsuneyo Seki, Atsushi Yamamoto, Takashi Kusano, Tsutomu Okutomi
  • Patent number: 5972131
    Abstract: An Ag--Cu alloy for a sliding contact containing:a) 0.1 to 8.0 wt. % of Cu, based on the weight of the alloy, wherein at least 70 wt. % of the Cu contained in the alloy is solid-solubilized in an Ag-.alpha.-phase; andb) 0.1 to 4.0 wt. %, based on the weight of the alloy, of at least one metal selected from the group consisting of Ge, Ni, Sn, In, Zn, Mg, Mn, Sb, Pb and Bi.The Ag--Cu alloy is desirably utilized to form a composite with a Cu or Cu alloy base material. Such composite has been found to be very useful for fabricating the commutator of a compact DC motor.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: October 26, 1999
    Assignees: Tanaka Kikinzoku Kogyo K.K., Mabuchi Motor Co., Ltd.
    Inventors: Takao Asada, Keiji Nakamura, Isao Shibuya, Toshiya Yamamoto, Tetsuya Nakamura, Kiyoshi Nakama
  • Patent number: 5876862
    Abstract: Sliding contacts comprising alloys such as Pd/Cu/Ag, Pt/Cu/Ag, Pd/Cu/Ag/Ni, Pt/Cu/Ag/Ni, Ag/Pd/Cu,Au, Ag/Pt/Cu/Au and two-layered composites comprising a surface layer of one of the foregoing alloys and a base layer comprised of copper or a copper-containing alloy. Also, three-layered composites comprising a surface layer of one of the foregoing alloys, an intermediate layer of one of the foregoing alloys and a base layer comprised of copper or a copper-containing alloy as well as direct current motors comprising commutators comprising a three-layered composite.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: March 2, 1999
    Assignees: Mabuchi Motor Co., Ltd., Tanaka Kikinzoku Kogyo K.K.
    Inventors: Isao Shibuya, Toshiya Yamamoto, Takao Asada, Tetsuya Nakamura
  • Patent number: 5808213
    Abstract: Silver-iron materials for electrical switching contacts with properties which come very close to those of silver-nickel materials formed of 4.6 to 15% by weight iron and 0.05 to 5% by weight of one or more of the oxides magnesium oxide, calcium oxide, yttrium oxide, lanthanum oxide, cerium oxide, chromium oxide, iron oxide, aluminum oxide, indium oxide, silicon oxide, and tin oxide, the balance being silver.
    Type: Grant
    Filed: November 19, 1996
    Date of Patent: September 15, 1998
    Assignee: Degussa Aktiengesellschaft
    Inventors: Wolfgang Weise, Willi Malikowski, Roger Wolmer, Peter Braumann, Andreas Koffler
  • Patent number: 5781993
    Abstract: A one-sided oxidized silver-cadmium object is formed. One side of a silver-cadmium object is covered with a non-silver-cadmium shield to enable the one side to resist oxidation. Then the object is oxidized under conditions that leave substantially unoxidized a layer of the object adjacent the one side. An oxidized silver-cadmium object has a non-silver-cadmium, oxidation-resistant shield attached to one side of the object, the object having a substantially unoxidized layer adjacent the one side.
    Type: Grant
    Filed: November 20, 1995
    Date of Patent: July 21, 1998
    Assignee: Checon Corporation
    Inventor: Donald E. Conaway
  • Patent number: 5679471
    Abstract: A thin film silver-nickel coating for use as a protective coating on electrical terminals of separable electrical connectors. The silver-nickel coating is a silver-nickel nano-composite material characterized by silver and nickel grains having an average grain size of about five to about fifty nanometers, yielding a silver-rich phase and a harder nickel-rich phase as a result of silver and nickel being immiscible. In accordance with this invention, the volume fraction of nickel significantly influences the fretting wear resistance of the coating, with a preferred nickel content being resulting in the presence of disconnected islands of the nickel phase dispersed within a relatively softer silver matrix.
    Type: Grant
    Filed: October 16, 1995
    Date of Patent: October 21, 1997
    Assignee: General Motors Corporation
    Inventors: Yang-Tse Cheng, George Albert Drew
  • Patent number: 5594220
    Abstract: In a rotary switch, a manually rotatable shaft turns a disk which has a plurality of riser cam segments on one of its faces. Stepwise rotation of the disk causes the cam segments to press down on flat spring contacts arranged in the switch to put the tip of one of the contacts at a time into contact with a stationary electrical contact bar that is coated with a noble metal. The spring contacts are configured such that when pressed by a cam the tips are caused to make contact with the stationary contact bar and then slide longitudinally so as the tip will pick up some of the noble metal coating from the contact bar. The tips are shaped with a traverse curve intersecting a longitudinal groove to thereby produce two points that make high unit stress contact with the stationary contact bar.
    Type: Grant
    Filed: August 22, 1995
    Date of Patent: January 14, 1997
    Assignee: US Controls Corp.
    Inventors: David G. Hackbarth, Kenyon A. Hapke, Spencer C. Schantz
  • Patent number: 5516995
    Abstract: A new class of low chop contact materials based on Ag-chromium carbide and Ag-Cr compositions have an essentially 100% dense, porosity free microstructure. These materials combine the advantageous properties of Ag-WC and Cu-Cr contacts without their disadvantages. A method of making this new class of low chop contact materials includes the steps of cold pressing a mixture of Ag and chromium or chromium carbide to form an unsintered blank and the elevated temperature infiltration of silver into the unsintered blank to obtain an essentially 100% dense, porosity free microstructure.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: May 14, 1996
    Assignee: Eaton Corporation
    Inventors: Graham A. Whitlow, William R. Lovic, Paul G. Slade
  • Patent number: 5451272
    Abstract: A silver-oxide material for electric contacts of high-current switches, having excellent deposition resistance and consumption resistance. The material is formed by subjecting to an internal oxidation treatment an Ag alloy consisting essentially, by weight %, of:Sn: 5.1-8.5%;In: 1.7-3.2%;Te: 0.1-0.6%; andAg and inevitable impurities: the balance. If required, at least one of the following elements may be added:Ni: 0.05-0.2%; andCd: 0.3-0.8%.
    Type: Grant
    Filed: April 8, 1994
    Date of Patent: September 19, 1995
    Assignee: Mitsubishi Materials Corporation
    Inventors: Yuzo Uemura, Shigeo Shibuya, Manabu Aoki
  • Patent number: 5420384
    Abstract: A contact material for a vacuum interrupter includes: (a) from 25 to 70% by volume of a highly conductive component selected from the group consisting of Ag, Cu and combinations thereof, and (b) from 30 to 75% by volume of an arc-proof component comprising a carbide of an element selected from the group consisting of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W and combinations thereof, wherein the average grain size of the said arc-proof component is from 0.3 to 3 micrometers and the average grain distance of the arc-proof component is within the range of 0.1 to 1 micrometer. Contacts for a vacuum interrupter obtained from the contact material have improved wear resistance, large current interruption characteristic, wear resistance, and chopping characteristic, and low temperature rise characteristic.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: May 30, 1995
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsutomu Okutomi, Atsushi Yamamoto, Tsuneyo Seki, Mikio Okawa, Mitsutaka Honma
  • Patent number: 5409762
    Abstract: The present invention provides inexpensive electric contact materials having higher hardness and higher melting point and being more excellent in the points of wear resistance and environmental resistance over the electric contact materials of Ag type, Au type, platinum group type, etc. having been used so far, production methods thereof and electric contacts used said contact materials.In the electric contact materials of the invention, basically, a covering layer having at least one selected from transition metals of groups IVa (Ti, Zr, Hf, etc.), Va (V, Nb, Ta, etc.) and VIa (Cr, Mo, W, etc.) as a major ingredient is formed on the substrate as an electric contact in a thickness of 0.03 to 100 .mu.m, and, if need be, a fixed intermediate layer is formed between said covering layer of electric contact and substrate or a fixed surface layer is formed on the outside of covering layer of electric contact, thus aiming at further improvement in the characteristics of contact.
    Type: Grant
    Filed: March 29, 1993
    Date of Patent: April 25, 1995
    Assignee: The Furukawa Electric Company, Ltd.
    Inventors: Masanori Ozaki, Keiji Mashimo
  • Patent number: 5338618
    Abstract: An electric contact material containing Li oxide of 0.01 to 2.0% by weight when represented in terms of the amount of Li, oxide of at least one rare earth element of 0.05 to 0.18% by weight when represented in terms of the amount of the rare earth element, and Ag or Ag alloy as the remaining portion; an electric contact material containing Li oxide of 0.01 to 2.0% by weight when represented in terms of the amount of Li, at least one rare earth element of 0.05 to 0.18% by weight when represented in terms of the amount of the rare earth element, at least one element selected from a group consisting of In, Sn, Zn, Mn, Pd, Sb, Cu, Mg, Pb, Cd, Cr and Bi by an amount of 0.1 to 1.0% by weight (however, in the case of Zn and Mn, the amount is set less than 0.5% by weight), and/or at least one element selected from a group consisting of Fe, Ni and Co by an amount of 0.03 to 0.6% by weight, and Ag as the remaining portion; and an electric contact formed by using the above material.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: August 16, 1994
    Assignees: The Furukawa Electric Co., Ltd., Mabuchi Motor Kabushiki Kaisha
    Inventors: Satoshi Suzuki, Nobuyuki Shibata, Ryotomo Shirakawa, Akira Matsuda
  • Patent number: 5270501
    Abstract: An electrode for an ignition distributor of an internal combustion engine is disclosed which is made of a copper-based sintered alloy. The alloy contains a copper matrix, and grains of Al.sub.2 O.sub.3 having an average grain size of 10 to 100 .mu.m. The Al.sub.2 O.sub.3 grains are dispersed uniformly in the copper matrix at a ratio of from 45 to 60 percent by surface area as measured in an arbitrary cross-section. The electrode of this construction exhibits very low capacitive-discharge current peaks and starting voltages, and hence the generation of radio wave noise can be substantially eliminated.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: December 14, 1993
    Assignees: Mitsubishi Materials Corporation, Mitsubishi Denki Kabushiki Kaisha
    Inventors: Noriaki Murahashi, Yutaka Ohashi, Tohru Kohno
  • Patent number: 5246512
    Abstract: The present invention relates to a contact for a vacuum interrupter obtained by processing a contact-forming material comprising from 20% to 60% by weight of Cr, Bi in an amount of from 0.05% to 1.0% by weight of the total amount of Cu and Bi, and the balance substantially Cu into the shape of a contact, and thereafter subjecting the processed material to vacuum heat treatment. The contact for the vacuum interrupter has both excellent anti-welding characteristics and excellent voltage withstanding characteristics.
    Type: Grant
    Filed: June 6, 1991
    Date of Patent: September 21, 1993
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Tsuneyo Seki, Tsutomu Okutomi, Atsushi Yamamoto, Kiyofumi Otobe, Tadaaki Sekiguchi
  • Patent number: 5233143
    Abstract: A high-power, high-repetition-rate spark gap switch having metal-hydride electrodes is provided The spark gap switch is configured with a trigger and two electrodes fabricated with metal hydrides. The hydride metals may be selected from a variety of alloys including iron, nickel, magnesium, and palladium based alloys. Use of these alloys for fabrication of the electrodes permits hydrogen to be absorbed into the electrode material at a density approximately that of liquid hydrogen. During operation of the switch, the increasing temperature causes hydrogen to be desorbed into cavity surrounding the switch. Whereas the increasing temperature lowers the breakdown voltage of the switch, the increasing pressure raises the breakdown voltage. The result is the switch operates at a constant breakdown voltage independent of temperature.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: August 3, 1993
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: R. Kenneth Hutcherson, Stuart L. Moran
  • Patent number: 5207842
    Abstract: The present invention relates to novel materials based on silver and tin oxide for the production of electrical contacts as well as the electrical contacts thus produced. According to the invention, these materials contain at least 6% by weight of tin oxide and from 0.02 to 5% by weight of tellurium oxide; the total content by weight of metal oxides, with the exclusion of tellurium oxide, does not exceed 15%, the balance being made up by silver. Application: manufacture of electrical equipment.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: May 4, 1993
    Assignee: Comptoir Lyon-Alemand Louyot
    Inventors: Jean-Paul Guerlet, Dan Weber, Sophie Coupez, Claude Lambert