Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7619177 | Nozzle fastening for electrical switching apparatus An electrical switching apparatus is disclosed with a moveable insulating nozzle for blowing an arc. According to the invention, the insulating nozzle is connected in an interlocking and force-fitting manner to at least one moveable component part of the switching a... | 11/17/2009 |
| 7022922 | Power switch with a mobile contact element and extinction gas flow that move in an axial direction when activated The invention relates to a power switch (100) that comprises a contact element (105, 107) mobile in an axial direction and an extinction gas flow that moves in said axial direction when the switch is actuated. Said extinction gas flow is coaxially surr... | 04/04/2006 |
| 6744000 | High-voltage circuit breaker having an insulating nozzle In a high-voltage circuit breaker having two arcing contacts arranged coaxially relative to one another and having an insulating nozzle which in the closed state is blocked by a first arcing contact the first arcing contact has a shaft having a greater diameter and ... | 06/01/2004 |
| 6744001 | High-voltage circuit-breaker including a valve for decompressing a thermal blast chamber A high-voltage circuit-breaker including a valve for decompressing a thermal blast chamber includes two contacts disposed in a breaking space which is delimited by a blast nozzle and contains a dielectric gas. It further includes a thermal blast chamber which commun... | 06/01/2004 |
| 6730871 | Compressed gas-blast circuit breaker A hollow contact tube is provided in a compressed gas-blast circuit breaker in order to improve dielectric properties. The outlet (6) of said contact tube cooperates with a deflecting body (9) and is surrounded by a fixed substantially hollow cylindric... | 05/04/2004 |
| 6696657 | Puffer type gas circuit breaker A puffer type gas circuit breaker wherein an insulated nozzle made of heat proof resin and a movable arc contact are mounted on a puffer cylinder to perform an open/close operation of the contact. The insulated nozzle is divided into three areas of a down... | 02/24/2004 |
| 6608481 | Pole of a circuit breaker with an integrated optical current sensor A pole of a high- and/or medium-voltage circuit breaker, including an insulating housing, at least one, interruption chamber which is positioned inside the insulating housing and contains at least a moving contact and at least a fixed contact. A device fo... | 08/19/2003 |
| 5902980 | Insulating component for high-voltage equipment An insulating component for use in high-voltage switching equipment, especially gas-insulated switching gear. A nozzle made of an insulating material is used in a power switch. Portions of the surface of the nozzle subject to high dielectric stresses in u... | 05/11/1999 |
| 5742017 | Circuit-breaker provided with a closure resistance having an insertion assembly A circuit-breaker including a moving assembly having a moving main contact (14) electrically connected to a first terminal (2A), a fixed assembly having a fixed arcing contact electrically connected to a resistance (5) which is connected to a second termi... | 04/21/1998 |
| 5739495 | Puffer-type circuit breaker and nozzle emitting gas with coaxial abutting plastic tube A compressed-gas circuit breaker is provided with two contacts arranged coaxially opposite one another, at least one of which can be driven to move in the axial direction. The two contacts define in the interrupted state a contact gap. The circuit breaker... | 04/14/1998 |
| 5654532 | Moving interrupter gap shield The movable nozzle of a puffer circuit interrupter has a coaxial cylindrical shield connected to its downstream end and the main movable contacts connected to its upstream end. The shield is electrically connected to the stationary contact terminal. The m... | 08/05/1997 |
| 5578806 | Compressed gas-blast circuit breaker The compressed gas-blast circuit breaker includes two moving contact members (1, 2) which are guided to move counter to one another along an axis (3) in a chamber which is filled with insulating gas. These contact members each have an arcing contact (8, 9... | 11/26/1996 |
| 5514844 | Switch A switch for use in electric power includes a fixed contact, a moving contact performing a switching operation with respect to the fixed contact, a cylinder working with the moving contact, a piston slidably provided in the cylinder, a buffer chamber whic... | 05/07/1996 |
| 5478980 | Compact low force dead tank circuit breaker interrupter A dead tank high voltage SF6 circuit breaker has a stationary cylinder SF6 puffer section, an arc generated SF6 pressure blast section, a moving arcing contact plug, and a moving open position shield. The contacts are oper... | 12/26/1995 |
| 5453591 | Sensing structure for component wear in high voltage circuit interrupters A vaporizable material, for example, a silicone, that is buried beneath the surface of a Teflon nozzle for a sulfur hexafluoride power circuit breaker in an area of the nozzle which is exposed to abrasion and wear due to arc products. In a similar manner,... | 09/26/1995 |
| 5424503 | Puffer type circuit interrupter with improved blast valve and permanent contacts A circuit-breaker includes first and second permanent contacts, a support tube for a mobile arc contact and a blast nozzle. At least one of these components is fixed via an interference fit. The blast nozzle abuts against one end of a tubular support memb... | 06/13/1995 |
| 5373131 | Puffer circuit-breaker with two concentric interrupting chambers A puffer circuit-breaker comprises a first interrupting chamber (2), a second interrupting chamber (4) situated within the first interrupting chamber, and a stationary electric arcing contact (6) which extends inside the second interrupting chamber. The s... | 12/13/1994 |
| 5274205 | Gas blast, puffer type circuit breaker with improved nozzle A gas blast circuit breaker comprises an insulation nozzle for blowing extinguishing gas to an arc generated between a stationary contact and a movable contact. The nozzle has a throat section into and out of which one of the two contacts is movable and a... | 12/28/1993 |
| 5258590 | Medium- or high-tension circuit breaker having abutting arcing contacts The present invention relates to a medium- or high-tension circuit breaking having abutting arcing contacts and comprising a casing filled with a gas having good dielectric properties and containing a stationary first abutting contact and moving equipment... | 11/02/1993 |
| 5231256 | Puffer type gas-insulated circuit breaker A puffer type gas-insulated circuit breaker is adapted to, when its movable electrode separates from a stationary electrode, enable an insulating gas blow toward an occurring arc to extinguish the same. An insulated nozzle is provided to direct the gas to... | 07/27/1993 |
| 5223682 | Arc-detecting circuit breaker A circuit-breaker including at least one insulating interrupting chamber inside which there are contacts and a blast nozzle. The insulating interrupting chamber is placed on an insulating support containing a drive rod. The circuit-breaker further include... | 06/29/1993 |
| 5155314 | Medium or high tension circuit breaker having end-to-end arcing contacts A gas filled medium tension circuit breaker includes an insulating case with a fixed first arcing contact connected to a first circuit breaker terminal. The circuit breaker includes moving equipment formed of a slidable first tube axially displaceable by ... | 10/13/1992 |
| 5155312 | Puffer type gas circuit interrupter An interrupter including a gas pressurizer for pressurizing a gas to flow toward a forward end of at least one contact of the interrupter, and a first orifice forming a first space with the forward end of the at least one contact for passing the gas press... | 10/13/1992 |
| 5153399 | Rotary puffer switch A puffer switch has a cylindrical shell filled with an electrically insulating gas, such as sulphur hexafluoride. A plurality of spaced parallel plates cooperating with the shell for defining a separate compression chamber or volume for each phase of an e... | 10/06/1992 |
| 4939322 | Puffer type circuit breaker The present invention relates to a puffer type circuit breaker having a high voltage and large capacity, which is provided with an insulating nozzle for blowing a arc-extinguishing gas of high pressure generated by separating a movable contactor from a fi... | 07/03/1990 |
| 4935590 | Gas-blast circuit breaker A puffer SF6 circuit breaker comprises a pair of separable contacts with formation of a breaking gap, a piston-cylinder assembly to compress the gas when the movable contact is actuated to the open position, and a puffer nozzle designed to channel the gas... | 06/19/1990 |
| 4791256 | Insulated nozzle for use in an interrupter In an interrupter, an insulated nozzle is disposed in the vicinity between a pair of contact elements and is adapted to extinguish an arc occurring between the contact elements by blowing an insulating gas thereto. This insulated nozzle is formed from a f... | 12/13/1988 |
| 4678878 | Gas pressure circuit breaker In a gas pressure circuit breaker with two fixed contacts an insulation tube is in the path of the quenching gas flow during circuit breaking. The insulation tube is grooved internally and externally. Openings for the quenching gas flow are formed by inte... | 07/07/1987 |
| 4667072 | Gas-insulated circuit breaker A protrusion is formed downstream of the throat of an insulating nozzle of a gas-insulated circuit breaker of puffer type. Quenching gas, after collision with the protrusion, is blown against an arc generated between a fixed arcing contact and a moving ar... | 05/19/1987 |
| 4628164 | Arc contact system for electrical circuit breakers, in particular of the type using an arc extinguishing fluid In an arc contact system for electrical circuit breakers, in particular of the type using an arc extinguishing fluid, comprising a stationary contact and a movable contact, one of the two arc contacts is formed by a tubular cylindrical body bearing a holl... | 12/09/1986 |
| 4565911 | High-voltage circuit-breaker In a dual-gas-blast puffer-type circuit-breaker a fixed insulating nozzle body (4) is integrated into a fixed insulating piston (10), forming thus a structural component. Said structural component is mounted on a fixed cylinder (11). Up to the large inner... | 01/21/1986 |
| 4516006 | Puffer type gas-blast circuit breaker A puffer type gas-blast circuit breaker provided with a movable electrode and a fixed electrode opposite the movable electrode, which electrodes are separable for implementing a circuit-breaking action, and a fixed current-carrying contact arranged around... | 05/07/1985 |
| 4511775 | Circuit breaker A circuit breaker, in particular a high-voltage circuit breaker employing SF6 gas, possesses a fixed contact part, and a movable switching piece which is provided with a blast nozzle and can be actuated by a drive. During the process of trippin... | 04/16/1985 |
| 4471185 | Series multiple nozzles for gas blast circuit interrupter A flow nozzle for a circuit interrupter includes a plurality of at least two throat regions which permit at least two transitions from subsonic to supersonic flow in the main nozzle flow channel. Very high speed photographs made of the operation of arc in... | 09/11/1984 |
| 4442330 | Puffer type current interrupter A puffer type current interrupter employing a pair of symmetric electrodes with contact bosses provided on their confronting surfaces. An insulator nozzle is arranged such that the throat section for providing a jet of arc blasting gas is located in the p... | 04/10/1984 |
| 4435627 | High tension circuit breaker A high tension circuit breaker which includes a stationary switching mechanism, a second switching mechanism axially movable in a first axial direction, a first and second arcing contact operatively connected to the movable switching mechanism and a stati... | 03/06/1984 |
| 4418256 | Electrically insulating plastic element for an electrical switching device, especially for use as the blast nozzle of a gas-blast switch A plastic mass of a blast nozzle contains a filler which is at least partially composed of powder of one or more metals. The proportion of metal powder amounts to at most 30 percent by weight, preferably 5 to 15 percent by weight. As the filler there is p... | 11/29/1983 |
| 4383152 | Circuit breaker A circuit breaker is disclosed in which a compressed quenching medium, heated by an arc, is rapidly removed from a main duct in such a manner that the arc is effectively blown by axially opposing flows of quenching medium. The circuit breaker includes a n... | 05/10/1983 |
| 4354072 | Pyrolytic cartridge interruption assistance actuator for puffer breaker A puffer breaker employs a low energy actuating mechanism during normal opening and closing operation and a pyrolytic cartridge actuating mechanism for high speed operation under fault conditions. A current detector is provided in circuit with the puffer ... | 10/12/1982 |
| 4322591 | Circuit breaker with means for producing a flow of arc-extinguishing gas A puffer type circuit breaker is provided with a pump means consisting of a piston and a cylinder for producing a blast of arc-extinguishing gas. The piston is axially displaceable against a spring force, and the cylinder is joined to the movable contact ... | 03/30/1982 |
