| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 121 | Powder-metallurgically produced composite material and method for its production | US09490659 | 2000-01-25 | US06350294B1 | 2002-02-26 | Gerd Renner; Udo Siefken |
| 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. The composite material of the present invention is suitable as switching contact in electrical vacuum switch boxes. | ||||||
| 122 | Process for producing a shaped article from contact material based on silver, contact material and shaped article | US123078 | 1998-07-27 | US6001149A | 1999-12-14 | Franz Hauner; Gunter Tiefel |
| A contact material, a shaped article or contact piece and a process for producing a shaped article from a contact material based on silver, include forming a powder mixture from silver and a metal oxide, and metallurgically processing the powder to form the shaped article with the metal oxide being reduced to metal. Since metal oxide powders are obtainable with a very much smaller particle size than metal powders, it is possible to obtain a contact material with a mean particle size of the metal incorporated as an active component of less than 1 .mu.m. Such a contact material has particularly favorable switching properties as a result of the fine particle size. | ||||||
| 123 | Sintered silver-iron material for electrical contacts and process for producing it | US806725 | 1997-02-27 | US5985440A | 1999-11-16 | Wolfgang Weise; Willi Malikowski; Roger Wolmer; Peter Braumann; Andreas Koffler |
| 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. | ||||||
| 124 | Vacuum circuit breaker with improved contact assembly | US419542 | 1995-04-10 | US5691521A | 1997-11-25 | Katsuhiro Komuro; Yoshitaka Kojima; Yukio Kurosawa; Shunkichi Endoo; Tooru Tanimizu; Yoshimi Hakamata; Katsumi Kuroda |
| A vacuum switch having a fixed side electrode unit and a movable side electrode unit mounted in a vacuum vessel. Each electrode unit includes an arc electrode, an arc electrode supporting member for supporting the arc electrode, a coil electrode and a conducting rod. Joining portions between the arc electrode and the arc electrode supporting member, the coil electrode and the conducting rod are integrally and directly formed metallurgically by solid phase diffusion using a hot isostatic process. A vacuum circuit breaker may be constructed incorporating the vacuum switch. | ||||||
| 125 | Electrode material | US233887 | 1994-04-26 | US5489412A | 1996-02-06 | Nobuyuki Yoshioka; Yasushi Noda; Toshimasa Fukai; Nobutaka Suzuki |
| A process for forming an electrode assembled into a vacuum interrupter is composed of the steps of blending silver(Ag) powder and chromium(Cr) powder in a content ratio such that Ag powder forms a matrix and Cr powder being dispersed therein, the blending ratio is prefer to be determined to contain 50 to 95 wt. % of Ag powder and 5 to 50 wt. % of Cr powder, compacting the blended powder to a compacted body, sintering the body at temperatures around melting point of Ag, and regulating density of the sintered article at least 90%. Particle size of Cr to be blended may be determined less than 150 .mu.m, more preferably, less than 60 .mu.m. Sintering temperature may be determined between 800.degree. to 950.degree. C. | ||||||
| 126 | Nobel metal and solid-phase lubricant composition and electrically conductive interconnector | US56289 | 1993-04-30 | US5316507A | 1994-05-31 | Patrick O. Capp |
| A noble metal and solid-phase lubricant composition and an an electrically conductive interconductor including the electrically conductive composition are disclosed. The electrically conductive composition includes a noble metal component and a solid-phase lubricant component. The solid-phase lubricant component is present in an amount sufficient to cause the electrically conductive composition to have a coefficient of friction which is significantly lower than the coefficient of friction of the noble metal component without causing the electrically conductive composition to be significantly less malleable than the noble metal component, nor to be significantly less corrosion resistant than the noble metal component. The electrically conductive composition can form a contact layer of the electrically conductive interconnector. The contact layer is bonded to a diffusion barrier which, in turn, is bonded to a bulk electrical conductor of the electrically conductive interconnector. | ||||||
| 127 | Contact for a vacuum interrupter | US711072 | 1991-06-06 | US5246512A | 1993-09-21 | Tsuneyo Seki; Tsutomu Okutomi; Atsushi Yamamoto; Kiyofumi Otobe; Tadaaki Sekiguchi |
| 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. | ||||||
| 128 | Sinter contact material for low voltage switching apparatus of the energy technology, in particular for motor contactors | US438740 | 1989-11-17 | US4980125A | 1990-12-25 | Wolfgang Haufe; Ralf-Dieter Krause; Bernhard Rothkegel, deceased |
| Sinter materials having the constitution AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO produced from an intraoxidized alloy powder have added thereto bismuth zirconate and/or bismuth titanate in parts by weight of preferably between 0.1 and 5%. For the production of these materials, bismuth zirconate and/or bismuth titanate is added as a separate powder to the intraoxidized alloy powder of AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO. With such a contact material, the excess temperature behavior in motor contactors is significantly improved. | ||||||
| 129 | Methods of making high performance compacts and products | US374324 | 1989-06-30 | US4954170A | 1990-09-04 | Maurice G. Fey; Natraj C. Iyer; Alan T. Male; William R. Lovic |
| High density compacts are made by providing a compactable particulate combination of Class 1 metals selected from at least one of Ag, Cu and Al, with material selected from at least one of CdO, SnO, SnO.sub.2, C, Co, Ni, Fe, Cr, Cr.sub.3 C.sub.2, Cr.sub.7 C.sub.3, W, WC, W.sub.2 C, WB, Mo, Mo.sub.2 C, MoB, Mo.sub.2 B, TiC, TiN, TiB.sub.2, Si, SiC, Si.sub.3 N.sub.4, usually by mixing powders of each, step (1); uniaxially pressing the powders to a density of from 60% to 95%, to provide a compact, step (2); hot densifying the compact at a pressure between 352 kg/cm.sup.2 (5,000 psi) and 3,172 kg/cm.sup.2 (45,000 psi) and at a temperature from 50.degree. C. to 100.degree. C. below the melting point or decomposition point of the lower melting component of the compact, to provide densification of the compact to over 97% of theoretical density; step (3); and cooling the compact, step (4). | ||||||
| 130 | Low voltage switching apparatus sinter contact material | US438514 | 1989-11-17 | US4948424A | 1990-08-14 | Wolfgang Haufe; Bernard Rothkegel, deceased |
| Sinter contact materials produced from an intraoxidized alloy powder having the constitution AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO have added thereto at least zirconium oxide and optionally additionally bismuth oxide in parts by weight of preferably between 0.1 and 5%. For the production of these materials, zirconium oxide power and optionally additionally bismuth oxide powder is added to the intraoxidized alloy powder AgSnO.sub.2 Bi.sub.2 O.sub.3 CuO. With such a contact material, the excess temperature behavior in motor contactors is improved. | ||||||
| 131 | Method of making dimensionally reproducible compacts | US374330 | 1989-06-30 | US4909841A | 1990-03-20 | Natraj C. Iyer; Alan T. Male; William R. Lovic |
| A process of hot pressing of materials to form articles or compacts is characterized by the steps: (A) providing a compactable particulate mixture; (B) uniaxially pressing the particles without heating to provide article or compact (22); (C) placing at least one article or compact (22) in an open pan (31) having an insertable frame (32) with edge surfaces (34) that are not significantly pressure deformable, where the inside side surfaces of the frame are parallel to the central axis B--B of the open pan, and where each article or compact is surrounded by fine particles of a separating material; (D) evacuating air from the container and sealing the articles or compacts inside the container by means of top lid (36); (E) hot pressing the compacts at a pressure from 352.5 kg/cm.sup.2 to 3,172 kg/cm.sup.2 to provide simultaneous hot pressing and densification of the articles or compacts; (F) gradually cooling and releasing the pressure; and, (G) separating the articles or compacts from the container, where there is no heating of the compacts in the process before step (E). | ||||||
| 132 | Hot isostatic pressing of high performance electrical components | US177274 | 1988-04-04 | US4810289A | 1989-03-07 | Norman S. Hoyer; Natraj C. Iyer |
| A process of hot isostatic pressing of powders to form electrical contacts is characterized by the steps: (A) mixing powders, 1 in the Drawing, from metal containing powder or metal containing powder plus carbon powder, where at least one of Ag and Cu is present, (B) thermal cleaning treatment of the powder, 2 in the Drawing, (C) granulating the thermally treated powder, 3 in the Drawing, (D) uniaxially pressing the powders without heating, 5 in the Drawing, to provide a compact, (E) placing at least one compact in a pressure-transmitting, pressure-deformable container, 6 in the Drawing, and surrounding each compact with fine particles of a separating material, (F) evacuating air from the container, 7 in the Drawing, (G) sealing the compacts inside the container, 8 in the Drawing, (H) hot isostatic pressing, 9 in the Drawing, the compacts through the pressure transmitting material at a pressure from 352 kg/cm.sup.2 to 2,115 kg/cm.sup.2 and a temperature from 0.5.degree. C. to 100.degree. C. below the melting point of the lower melting powder constituent, to provide simultaneous hot-pressing and densification of the compacts, (I) gradually cooling and releasing the pressure on compacts, 10 in the Drawing, and (J) separating the compacts from the container, 11 in the Drawing, where there is no heating of the compacts in the process before step (H). | ||||||
| 133 | Silver-tungsten carbide-graphite electrical contact | US19284 | 1987-02-26 | US4689196A | 1987-08-25 | Chi H. Leung |
| An electrical contact comprises 5 to 20 weight percent tungsten carbide, 0.5 to 3 weight percent graphite, balance silver. The contact has low erosion rate, low contact resistance, and anti-welding properties. | ||||||
| 134 | Work material of silver with tin and tungsten oxides for electrical contact | US174827 | 1980-08-04 | US4330330A | 1982-05-18 | Wolfgang Bohm |
| There are needed materials based on Ag/SnO.sub.2 to replace the known Ag/CdO materials for electrical contact on switches, which replacement materials contain an additional metal oxide component, without having to take into account an undesired temperature increase in the switching device. This is attained according to the invention with a material that contains 8-20 weight % tin oxide SnO.sub.2, 0.05-5 weight % tungsten oxide, balance silver. | ||||||
| 135 | Method of manufacturing a contact bridge | US899961 | 1978-04-25 | US4222167A | 1980-09-16 | Heinrich Hassler; Joachim Grosse; Gert Fischer; Joachim Hannich |
| A method of manufacturing a contact bridge for an electric switching apparatus which contact bridge includes an electrically highly conductive overlay and a concave-shaped support layer. The method comprises the steps of pressing a powder blank comprising two layers of metallic material, one of which comprises iron for the support layer and the other of which comprises copper for the overlay; sintering the blank in a protective gas; sizing the blank; further sintering the blank in a protective gas; further pressing the blank by reverse-flow cup extrusion; and applying an electrical contact to the overlay. Alternatively, the powder blank may comprise a layer of copper-zirconium and silver-metal oxide, the latter for an electrical contact layer. In this embodiment, the contact bridge is formed with the electrical contact in one step and there is no need to apply a contact to the bridge after the pressing by reverse-flow cup extrusion. | ||||||
| 136 | Apparatus for the production of compacts of layerwise different composition, for heavy duty electric contacts | US759243 | 1977-01-13 | US4080128A | 1978-03-21 | Horst Schreiner; Bernard Rothkegel |
| An apparatus for producing compacts having layers of different composition. More particularly, each metal powder layer is charged in a separate work station and each is pressed in a separate work station with an individual constant pressing pressure. This is achieved by moving a number of pressing tools corresponding to the number of work stations intermittently from station to station by cyclic interchange. After each movement, charging, pressing and ejecting occur simultaneously at the respective work stations. | ||||||
| 137 | Material for electric contacts | US2733319D | US2733319A | 1956-01-31 | ||
| 138 | Method of making raised electrical contact points | US76633647 | 1947-08-05 | US2545352A | 1951-03-13 | GIBBS GEORGE S |
| 139 | Arcing tip and method for making the same | US75002734 | 1934-10-25 | US2034550A | 1936-03-17 | ADAMS ROY L |
| 140 | ELECTRODE MATERIAL AND METHOD FOR MANUFACTURING ELECTRODE MATERIAL | US15751595 | 2016-08-10 | US20180240612A1 | 2018-08-23 | Keita ISHIKAWA; Kenta YAMAMURA; Kosuke HASEGAWA; Shota HAYASHI; Takaaki FURUHATA |
| It is an electrode material that is used as an electrode contact of a vacuum interrupter and that contains one or more parts by weight of a heat-resistant element and one part by weight of Cr, the remainder being Cu and an unavoidable impurity. A part of Cr powder and the heat-resistant element powder are mixed together, and this mixed powder is sintered such that a peak corresponding to Cr element disappears in X-ray diffraction measurement. A solid solution powder obtained by pulverizing a sintered body of the heat-resistant element and Cr obtained by the sintering is mixed with the remaining Cr powder, and this mixed powder is shaped and then sintered. A sintered body obtained by this sintering is infiltrated with Cu. | ||||||
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