High-voltage switches with arc preventing or extinguishing devices inventions 04/09

20090107957 - High-voltage circuit breaker: Described is a high-voltage circuit breaker provided with two opposite-arranged arcing contacts, which are surrounded by an insulating nozzle. Furthermore provided are two main contacts, arranged opposite each other outside of the insulating nozzle, with respectively one of these contacts being assigned to one of the two arcing contacts. The... Agent: Harness, Dickey & Pierce, P.L.C

20090095716 - Circuit breaker: A circuit breaker has a nominal current contact arrangement with a nominal current contact and a nominal current mating contact that are movable relative to each other, and with an arc contact arrangement that has an arc contact and an arc mating contact that are movable relative to each other.... Agent: Lerner Greenberg Stemer LLP

20090095717 - Azeotrope-like compositions containing sulfur hexafluoride and uses thereof: Provided are novel azeotrope-like compositions of SF6 and N2O, as well as methods of using the same. Also provided are methods of using SF6 compositions, including azeotrope-like compositions, including a method for suppressing an electric arc or corona discharge and a method for flame suppression. Further provided are electrical devices... Agent: Honeywell International Inc.

20090095718 - Vacuum cartridge for an electrical protection apparatus such as a switch or a circuit breaker: This cartridge comprises at least three shields comprising one shield called mid-potential shield inserted between the two contacts and at least one shield called partial shield inserted between said mid-potential shield and one of the contacts, the distance between said mid-potential shield and the contacts being selected such that the... Agent: Steptoe & Johnson LLP

20090090697 - Interrupting chamber of a circuit-breaker having two compression volumes: means for obstructing the ports of the drive tube as from the start position of an operation of opening the circuit-breaker and up to an intermediate position which is reached between the position of separation of two arcing contacts from each other and the end position of an operation of... Agent: Nixon Peabody LLP

20090090698 - Gassing insulator assembly, and conductor assembly and electrical switching apparatus employing the same: A gassing insulator assembly for a line conductor assembly of an electrical switching apparatus is provided having a line conductor and first and second gassing insulator members. The insulator members are constructed from a gassing material. The first gassing insulator member is disposed near a first end of the line... Agent: Martin J. Moran

20090084761 - Multi-vacuum contactor control system: A control system for controlling and synchronizing a plurality of medium-voltage vacuum contactors comprises a two-level network structure. A dedicated network includes a plurality of servant control units operably coupled to the vacuum contactors and configured to ascertain a plurality of different data and conditions thereof. In addition, the dedicated... Agent: Rockwell Automation, Inc./bf

20090084762 - Adjustable switching mechanism for series coupled vacuum interrupters: An adjustable switching mechanism for adjusting the tolerance of electrical contacts of series coupled vacuum interrupters includes a primary drawbar coupled to a secondary drawbar via a pair of coupling pull rods. The primary and secondary drawbars are adjustably attached to the coupling pull rods by a plurality of adjustable... Agent: Renner Kenner Greive Bobak Taylor & Weber