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| Number | Title | Issue Date |
| 7173208 | Vacuum interrupter A vacuum interrupter for reducing contact resistance and thereby reducing electromagnetic repulsive force between electrodes, is obtained. The vacuum interrupter includes a stationary electrode rod fixedly placed on one closed end of a cylindrical evacuated envelope... | 02/06/2007 |
| 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 |
| 7041929 | Contact arrangement for a vacuum switch tube The invention relates to a contact arrangement for a vacuum switch tube for low-voltage power switches. The aim of the invention is to reduce the contact force required to control short circuit currents. To this end, a twin-contact contact arrangement is used wherei... | 05/09/2006 |
| 7011717 | Method for heat treatment of silicon wafers and silicon wafer According to the present invention, there are provided a method for heat treatment of silicon wafers wherein a silicon wafer is subjected to a heat treatment at a temperature of from 1000° C. to the melting point of silicon in an inert gas atmosphere, and temperatu... | 03/14/2006 |
| 6965089 | Axial magnetic field vacuum fault interrupter An improved vacuum interrupter is disclosed. The vacuum interrupter includes a ring-shaped structure placed between a contact support structure and an electrical contact associated with the contact support structure. A resistivity of the ring-shaped structure is hig... | 11/15/2005 |
| 6891121 | Integrated contact for power switchgear An integrated contact for power switchgear, its arc proof component, magnetic field generating component and conductive component are set in an open container. The conductive component and the magnetic field generating component are mutually combined and set at the ... | 05/10/2005 |
| 6765167 | Electric contact member and production method thereof An electric contact member has a texture wherein fire proof metal powder having the form of a flat plate is diffused in a matrix of a highly conductive metal. The flat surface is oriented in one direction and the surface in parallel with the flat surface of the fire... | 07/20/2004 |
| 6753494 | Sintered body and electrode, method for surface densitication of these, process for manufacturing electrode by this method and circuit breaker An electrode comprises an electrode main body having a porosity, and the conductivity of the electrode main body at its part ranging from the arc running face to a stated depth is made higher than the conductivity at the section or the conductivity at the part rangi... | 06/22/2004 |
| 6747233 | Non-linear magnetic field distribution in vacuum interrupter contacts Novel interrupter assembly designs utilizing saturable magnetic materials are disclosed and described. In certain embodiments of the invention the saturable magnetic materials are placed in the interrupter contact body and/or electrode. The inclusion of saturable ma... | 06/08/2004 |
| 6476338 | Vacuum switch A third electrode (8A) is soldered, via a support fitting (9) onto the inner surface of a support part (1a) which projects into the intermediate part of the inner surface of an insulation tube (1A). An arc generated between the fixed-side contact (5A) and... | 11/05/2002 |
| 6437275 | Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes thereof The invention aims at providing a vacuum circuit-breaker, a vacuum valve used therein and electrodes for the vacuum valve, which can reduce the manufacturing cost while being of high performance and compact in size. The invention resides in a vacuum circu... | 08/20/2002 |
| 6376791 | Vacuum valve A method for improving flux density in a vacuum valve, includes producing, with a vacuum valve, an axial magnetic field parallel to an arc generated between a movable and a stationary electrodes facing each other, and adjusting a magnitude of an axial flu... | 04/23/2002 |
| 6346683 | Vacuum interrupter and vacuum switch thereof {W--Cux Sb-balance Cu} alloy is employed for contacts. As the anti-arcing constituent in the alloy W or WMo in a content of 65 to 85%, of grain diameter 0.4 to 9 μm is employed. As auxiliary constituent, Cux Sb is employed, the cont... | 02/12/2002 |
| 6326573 | Vacuum switching device In a vacuum switching device having first and second contacts, the first contact only is composed wholly or partly of a combination of at least a high-conductivity material and an arc-resistant material, e.g. chromuim, tungsten or tungsten carbide, and/or... | 12/04/2001 |
| 6107582 | Vacuum valve 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 0.1~150 μm represent at least 90 volume %, and ... | 08/22/2000 |
| 5793008 | Vacuum interrupter with arc diffusing contact design A vacuum circuit interrupter has a coil for generating an axially oriented magnetic field to maintain an electric arc in a diffuse rather than columnar mode upon opening of the interrupter. At least one of two electrodes having abuttable disc shaped conta... | 08/11/1998 |
| 5726407 | Contact electrode for vacuum interrupter A contact electrode for a vacuum interrupter including a conductive component having at least one selected from the group consisting of copper and silver, and an arc-proof component with a melting temperature of more than 1500° C. In the contact electrod... | 03/10/1998 |
| 5691521 | Vacuum circuit breaker with improved contact assembly 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 con... | 11/25/1997 |
| 5500499 | Contacts material for vacuum valve A contacts material for a vacuum valve including an arc-proof constituent including at least one selected from the group of chromium, titanium, zirconium, vanadium and yttrium, an auxiliary constituent including at least one selected from the group of tan... | 03/19/1996 |
| 5294761 | Vacuum interrupter A vacuum interrupter comprises a vacuum container which includes an insulation tube made of ceramics and having openings at both ends thereof, and sealing metals for hermetically sealing the openings respectively. In the vacuum container, a pair of contac... | 03/15/1994 |
| 5225381 | Vacuum switch contact material and method of manufacturing it A vacuum switch contact material consists essentially of a mixture of Cu and Crx Oy (x=1 to 2, y=0 to 3) wherein Crx Oy is in a particulate state, the center part of the particles consists of Cr2 O | 07/06/1993 |
| 5189270 | Contact structure for vacuum circuit breaker A contact structure for a vacuum circuit breaker has an electrically insulating vacuum vessel, fixed and movable contact units sealed in the vacuum vessel and shield members surrounding the fixed and movable contact units in the vacuum vessel. Particles o... | 02/23/1993 |
| 5120918 | Vacuum circuit interrupter contacts and shields Copper-chromium contacts and copper-ferrous material shields are used in vacuum circuit interrupters. The copper chromium contacts include a specific copper-iron non-abutting section, and an abutting layer preferably of copper-chromium with a layer thickn... | 06/09/1992 |
| 5109145 | Vacuum interrupter contacts and process for producing the same A vacuum breaker contact produced according to the coating step of forming a metal coated layer comprising at least one metal selected from the group consisting of Cu, Ag, Ni, Sn, In, Fe and alloys thereof on at least a part of the surface of the contact ... | 04/28/1992 |
| 4935588 | Contact arrangement for vacuum switches with axial magnetic fields Contact pieces for vacuum switches with axial magnetic field are designed e.g. as cup contacts with slotting in the same direction which support a diskshaped contact body and have means for the suppression of eddy currents. According to the invention, the... | 06/19/1990 |
| 4926017 | Vacuum breaker A pair of electrodes connected to conductors through joining means respectively are arranged in a vacuum switch tube such that current passes when they come into contact, and does not pass when they separate. At least part of the electrodes, the conductor... | 05/15/1990 |
| 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 |
| 4698467 | Electrodes of vacuum switch An electrode structure disposed in a vacuum switch generally comprises a pair of relatively separable electrodes and a pair of contacts provided on the opposing surfaces of the electrodes and surface areas of the contacts are selected to be smaller than t... | 10/06/1987 |
| 4695688 | Electrical contact construction An electrical contact assembly includes a contact, a contact support integrally connected to a first surface of the contact, and an insert disposed proximate a second, arc-supporting surface of the contact for stabilizing an electrical arc. In one embodim... | 09/22/1987 |
| 4695687 | Contact arrangement for vacuum switches with axial magnetic field, and method for the production of the respective contact pieces Contact pieces for vacuum switches with axial magnetic field are designed, for example, as pot type contacts with codirectional slotting which contain in each instance a disk-shaped contact body of contact material and have an arrangement for the suppress... | 09/22/1987 |
| 4686338 | Contact electrode material for vacuum interrupter and method of manufacturing the same A novel contact electrode material for vacuum interrupters is disclosed, by which the chopping current value inherent in contact material can be reduced so that it is possible to stably interrupt small lagging current due to inductive loads without genera... | 08/11/1987 |
| 4677264 | Contact material for vacuum circuit breaker The present invention provides a contact material for a vacuum circuit breaker containing therein copper (Cu) and chromium (Cr) with further addition of at least one kind of boride selected from borides of chromium (Cr), molybdenum (Mo) and tungsten (W). ... | 06/30/1987 |
| 4659885 | Vacuum interrupter A vacuum interrupter of improved large current interrupting capability and dielectric strength has a pair of separable electrodes (5,6) a vacuum envelope (4) electrically insulating and enclosing the pair therewithin, a contact-making portion (14) of mate... | 04/21/1987 |
| 4640999 | Contact material of vacuum interrupter and manufacturing process therefor Contact materials of a vacuum interrupter and producing process therefor are disclosed. The contact materials provide a contact which is much high in relatively large current and small lagging and leading current interrupting capabilities and dielectric s... | 02/03/1987 |
| 4626282 | Contact material for vacuum circuit breaker Contact material for vacuum circuit breaker according to the present invention contains (1) copper, (2) molybdenum, and (3) niobium or tantalum.... | 12/02/1986 |
| 4584445 | Vacuum interrupter A vacuum interrupter of more improved large current interrupting capability and dielectric strength is disclosed. The interrupter has a pair of separable contact-electrodes (13, 24), a vacuum envelope (4) generally electrically insulating and enclosing th... | 04/22/1986 |
| 4554425 | Contact of vacuum interrupter and manufacturing process therefor A contact of a vacuum interrupter and a manufacturing process therefor are disclosed. The contact can greatly reduce the chopping current of the interrupter, can greatly increase the dielectric strength thereof and can improve the large- and small-current... | 11/19/1985 |
| 4553002 | Axial magnetic field vacuum-type circuit interrupter An axial magnetic field vacuum-type circuit interrupter. Provided in an evacuated housing is a pair of opposed contacts at least one of which is movable with respect to the other and is movable between a closed position in engagement with the other contac... | 11/12/1985 |
