Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7638721 | Contact surfaces for electrical contacts A contact surface. for electrical contacts may include an Ag layer deposited on a copper-based substrate using galvanic methods. The Ag layer includes finely dispersed graphite particles in a quantity of, e.g., 1 to 3 weight % of the Ag layer, the graphite particles... | 12/29/2009 |
| 7161105 | Electrical switching device An electrical switching device, in particular a circuit breaker, is disclosed. In order to shorten the opening times of a switching device such as this, a snap-action system is used. The system interacts with the moving contact piece, of an electrical switching devi... | 01/09/2007 |
| 7161103 | Moveable contact assembly, method of manufacturing the same, and switch using the same A movable contact assembly includes a base sheet made of insulating film, a contact provided under a bottom surface of the base sheet, and a conductive layer comprising silver paste on the base sheet. The silver paste contains 12 wt % to 15 wt % of resin binder and ... | 01/09/2007 |
| 7012492 | Contact construction for DC loads and switching device having the contact construction A contact construction and switching device for DC loads that can be repeatedly used while minimizing problems such as cut-off failure, locking and deposition due to an abnormal continuation of an arc between the contacts, burning and destruction of the contacts, an... | 03/14/2006 |
| 6967561 | Current control device A current control device is described wherein a pressure conduction composite is compressed and decompressed to alter its conductivity and thereby current conduction through the device. The pressure conduction composite is composed of a nonconductive matrix, a condu... | 11/22/2005 |
| 6943660 | Current control device A current control device is described wherein a pressure conduction composite is compressed and decompressed to alter its conductivity and thereby current conduction through the device. The pressure conduction composite is composed of a nonconductive matrix, a condu... | 09/13/2005 |
| 6652968 | Pressure activated electrically conductive material A pressure activated electrically conductive polymeric matrix material that is doped with particulate filler material. Electrical conductivity is pressure activated with a change in electrical resistance; specifically, with no pressure applied, the materi... | 11/25/2003 |
| 6630080 | Conductive resin composition and encoder switch using the same A long-life encoder switch which can enable flexible production in which a wide variety of products are manufactured in low volume is provided by using a conductive resin composition which has both excellent conductivity and abrasion resistance as a mater... | 10/07/2003 |
| 6350294 | Powder-metallurgically produced composite material and method for its production 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 mat... | 02/26/2002 |
| 6246020 | Micro switch having silver containing contacts A micro switch includes a fixed contact and a movable contact. One is made of silver-carbon sintered metal, and the other is made of a silver-metal oxide alloy. The silver-carbon sintered metal includes carbon powder particles sufficiently small in averag... | 06/12/2001 |
| 6027821 | Contact material for vacuum interrupter and method for producing the same 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 compo... | 02/22/2000 |
| 5985440 | Sintered silver-iron material for electrical contacts and process for producing it 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... | 11/16/1999 |
| 5972131 | Ag-Cu alloy for a sliding contact 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--phase; and b) 0.1 to 4.0 wt. %, based on the weight ... | 10/26/1999 |
| 5972068 | Contact material for vacuum valve 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 co... | 10/26/1999 |
| 5853083 | Contact material for a vacuum circuit breaker and a method for manufacturing the same Interrupting and chopping characteristics of a Cu--Cr contact alloy are improved by rounding Cr particles to be spherical in the alloy. The Cr particles are rounded in the alloy by sintering raw Cr powder particles having an average particle diameter of l... | 12/29/1998 |
| 5843567 | Electrical component containing magnetic particles There is disclosed an electrical component having an axial direction and two ends for making electrical contact with another component comprising a plurality of electrically conductive fibers in a matrix, the plurality of the fibers being oriented in the ... | 12/01/1998 |
| 5701993 | Porosity-free electrical contact material, pressure cast method and apparatus A 100% dense, porosity free copper-chromium contact has been prepared in which deleterious porosity has been eliminated. This copper-chromium contact has been produced by pressurizing liquid copper to infiltrate an evacuated chromium based, lightly sinter... | 12/30/1997 |
| 5698008 | Contact material for vacuum valve and method of manufacturing the same A contact material for a vacuum valve including, a conductive constituent including at least copper, an arc-proof constituent including at least chromium and an auxiliary constituent including at least one selected from the group consisting of tungsten, m... | 12/16/1997 |
| 5628448 | Process for bonding a contact layer of silver-metal oxide material and metal contact base, and suitable contact layer A contact facing is normally bonded to the carrier by brazing or welding, for which purpose, the bonding side has to have a suitable layer. According to the invention, prior to the bonding operation, the contact facings are treated without fusion in such ... | 05/13/1997 |
| 5626948 | Electrical system having a multilayer conductive composition An electrical system including a multi-layer conductive composition is disclosed. The multi-layer conductive composition includes at least a first composition, which may be a bottom composition layer, and a second composition, which may be a top compositi... | 05/06/1997 |
| 5497133 | Switch with improved contacts for use in high temperature environments A switch is made for use in elevated temperatures. A first stationary contact carrier is made of stainless steel and configured to be rigidly attached to a first stationary contact pad that is made of a nickel silver alloy. A second stationary contact pad... | 03/05/1996 |
| 5417363 | Process for bonding contacts to a contact base by hard soldering and semifinished product which can be obtained by this process Particularly in the case of contacts consisting of a silver-metal oxide-(AgMeO)-based material which are provided on their the back side with solder, it is noted, upon hard soldering, on a contact base that solder can ascend in undesired manner up to the ... | 05/23/1995 |
| 5272295 | Electric contact and method for producing the same An electric contact is provided on at least one of a pair of conductors and includes a surface which is coated with a ceramic layer comprising at least one material selected from the group consisting of nitrides, carbides and borides of high melting point... | 12/21/1993 |
| 5270504 | Sliding contact member for high currrent densities A sliding contact member substantially free of the toxic metals lead and antimony, includes copper, carbon, and at least one added material which is selected from the group consisting of a metal and a metal alloy having a melting temperature which is subs... | 12/14/1993 |
| 5270106 | Fibrillated pultruded electronic component An electronic component for making electrical contact with another component comprising a nonmetallic pultruded composite member having a plurality of small generally circular cross section conductive fibers in a polymer matrix the plurality of fibers bei... | 12/14/1993 |
| 5246512 | Contact for a vacuum interrupter 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 bal... | 09/21/1993 |
| 5199553 | Sliding contactor for electric equipment A movable electrical contactor having a surface thereof in slidable contact with a mating conductor, the surface being coated with a composite material in which particles of graphite (C) are dispersed in a matrix of silver (Ag). The coating film is formed... | 04/06/1993 |
| 5149362 | Contact forming material for a vacuum interrupter An Ag-Cu-WC contact forming material for a vacuum interrupter comprising a highly conductive component comprising Ag and Cu and an arc-proof component comprising WC wherein the content of the highly conductive component is such that the total amount of Ag... | 09/22/1992 |
| 5140114 | Electric contact with base metal An electric contact with a base metal used as a switch wherein the non-welded peripheral portion of the contact is prevented from bow-like bending and from peeling off. The electric contact with a base metal having a contact promoting shape is formed by d... | 08/18/1992 |
| 5139862 | Pultruded electronic device An electronic device for conducting electric current has two contacting components at least one of which is a nonmetallic electronic contact in the form of a pultruded composite member made of a plurality of small generally circular cross section conducti... | 08/18/1992 |
| 4927989 | Contact material for vacuum circuit breaker A contact material for a vacuum circuit breaker having excellent properties, which consists essentially of copper, molybdenum, one member selected from the group consisting of niobium and tantalum, and one or more kinds of low melting point materials.... | 05/22/1990 |
| 4922068 | Densified braided switch contact An electrical switch assembly is made with a braided electrical conductor having a densified end which has reduced porosity from the braided wire. Preferably, the densified end is formed by squeezing copper wires with a solder matrix to reduce the air in ... | 05/01/1990 |
| 4908158 | Electrical contact material and method of preparing same An electrical contact material consists of Ag in which a metallic oxide is produced and dispersed through an internal oxidation and containing as metallic elements Cd, Mn and Al. With this contact material of this composition, there can be shown a high an... | 03/13/1990 |
| 4855104 | Method for the production of sintered electrical contact material for low voltage power switching Contact materials based on AgSnO2 and having Bi2 O3 and CuO as further metal oxide additives were previously disclosed. In these materials the total content of all metal oxides was supposed to be between 10 and 25% by volu... | 08/08/1989 |
| 4803322 | Electrical contacts for electric breakers Electrical contacts especially for use with electric breakers, consisting of (1) a base made from a silver-tin system alloy containing In, and (2) a clad over the base made from a silver-cadmium system alloy, the alloys having been internally oxidized. Th... | 02/07/1989 |
| 4777335 | Contact forming material for a vacuum valve A contact forming material for a vacuum valve or vacuum circuit breaker comprising (a) a conductive material consisting of copper and/or silver, and (b) an arc-proof material consisting of chromium, titanium, zirconium, or an alloy thereof wherein the amo... | 10/11/1988 |
| 4766274 | Vacuum circuit interrupter contacts containing chromium dispersions A powdered metallurgical procedure for forming chromium copper contacts used in vacuum circuit interrupters, in which prealloyed powder formed by mixing to copper, chromium of between two to thirty-seven weight percent is rapidly solidified after melting ... | 08/23/1988 |
| 4743718 | Electrical contacts for vacuum interrupter devices A vacuum interrupter device 11 with contacts 21 and 27 formed from a mixture of copper, chromium, bismuth, and at least about 0.5 weight percent of chromic oxide. The mixture can additionally include small amounts of silver, iron and titanium. The chromic... | 05/10/1988 |
| 4729809 | Anisotropically conductive adhesive composition An anisotropically conductive adhesive composition (10) for use in electrically connecting at least one conductive area (14) on one substrate (12) with at least one conductive area (20) on a second substrate (18) is disclosed. The composition (10) is comp... | 03/08/1988 |
| 4687515 | Vacuum interrupter contact An electrical contact for vacuum interrupters of a pressed and sintered composition of copper (60-80 wt %), ferrovanadium alloy (40-100 wt % of the balance) with at least 80 wt % of any remainder consisting of a refractory metal of the group of chromium, ... | 08/18/1987 |
