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| Number | Title | Issue Date |
| 7289309 | Isolation apparatus The apparatus is intended for disconnection of a live electrical conductor and has an enclosure (3) and two power connections (1, 2) which are passed out of the enclosure (3). A conductor section (7) which connects the two power connectio... | 10/30/2007 |
| 7285743 | Shielded encapsulated vacuum interrupter A shielded encapsulated vacuum interrupter with a ceramic vacuum chamber and opposing conductive end caps is provided. One end cap is electrically connected to a fixed contact, while an opposing end cap is connected to a moving contact. The moving contact is actuata... | 10/23/2007 |
| 7094986 | ARC chute assembly The arc plates of an arc chute assembly for a circuit breaker are supported in spaced, stacked relation by a structural shell molded of a gas evolving resin. Generation of arc gases, that cool the arc thereby increasing the current interruption capability of the bre... | 08/22/2006 |
| 7091438 | Circuit breaker with improved arc extinction system An improved circuit breaker includes an arc extinction system having one or more insulators that generates a desirable gas in the presence of an arc. The exemplary circuit breaker includes gas-generating insulators disposed at three sides of a stationary contact and... | 08/15/2006 |
| 6903649 | Fuse with fuse link coating A fuse that includes an arc energy reducing coating to reduce arc energy during a short-circuit and/or a full voltage overload current interrupt is described. The fuse includes end conductor elements, and at least one fuse element secured between and making electric... | 06/07/2005 |
| 6700087 | Arc chute assembly An arc chute including a first side wall having a plurality of holes, a second side wall having a plurality of holes and spaced apart from the first side wall, and a plurality of arc chute plates mounted between the first and second side walls. Each of th... | 03/02/2004 |
| 6242707 | Arc quenching current limiting device including ablative material A current limiting device for protecting electrical circuits has a case and a pair of separable electrodes disposed within the case. Each electrode has a plurality of openings with an ablative member abutting the openings at an outer surface of the electr... | 06/05/2001 |
| 6218636 | Switchgear arc extinguishing chamber with side walls made of composite material An electrical arc extinguishing chamber designed to be placed facing separable contacts of a switchgear apparatus and to extinguish the arc generated by separation of the contacts comprises two side walls facing one another and a plurality of spaced apart... | 04/17/2001 |
| 5889249 | Tightly joined wire mesh deionizing device for a current breaker The invention relates to a gas deionization device and an arc extinguishing chamber notably for a multipole low voltage circuit breaker with a molded case. A porous shield comprising one or more superposed metallic wire cloths. Each cloth is formed by a c... | 03/30/1999 |
| 5834724 | Circuit breaker with grid support mounted over stationary contactor In a circuit breaker, a grid support (12) having a pair of side walls (12a) which are confronted with each other, is provided by molding resin, and arc-extinction grids (6) are inserted into grooves formed in the side walls (12a). The grid support is fixe... | 11/10/1998 |
| 5828026 | Stock giving off arc-extinguishing gas, and gas-blast circuit breaker comprising such a stock The stock contains an insulating-material matrix and a filler embedded in the matrix and is distinguished by a cellular structure. The predominant portion of the cells is filled with a material having arc-extinguishing properties or contains a material wh... | 10/27/1998 |
| 5756951 | Arc chute having three barriers for the passage of arc gasses An arc chute for a circuit-breaker has a chute member with arc splitters and an end member that seals off the chute member to the top. The end member has three barriers for arc gases, the first and the second barrier have webs with a more or less square c... | 05/26/1998 |
| 5406245 | Arc-quenching compositions for high voltage current limiting fuses and circuit interrupters Arc-quenching coating compositions are provided with effective arc-extinguishing properties and improved track resistance properties, and are relatively easy to apply in liquid form. The coating compositions are used, for example, in high voltage current ... | 04/11/1995 |
| 5359174 | Thermally conductive, insulating, arc-quenching coating compositions for current interrupters Effective arc-quenching is desired for current interrupters as defined to include circuit breakers, contactors, fuses and the like under conditions of operation where an electrical arc is produced that must be quenched to eliminate an undesirable current ... | 10/25/1994 |
| 5247142 | Circuit interrupter ARC chute side walls coated with high temperature refractory material A circuit interrupter includes an arc chute containing high temperature refractory coated side walls. The high temperature refractory material may include a thinner material. The side walls comprise materials such as cotton fiber, wood fiber, phenolic mat... | 09/21/1993 |
| 4975551 | Arc-extinguishing composition and articles manufactured therefrom An arc-quenching composition that is suitable for deionizing and extinguishing a high-voltage electrical arc comprises an arc-extinguishing material, such as melamine, and a binder, the binder including a thermoplastic polymer polymerized from a carboxyli... | 12/04/1990 |
| 4950852 | Electric circuit breaker arc chute composition A current limiting circuit breaker having a pair of separable contacts closely spaced for electrodynamic repulsion upon the occurrence of a short circuit overload condition utilizes an arc chute to cool and extinguish the arc that occurs when the contacts... | 08/21/1990 |
| 4876421 | Asbestos-free arc-confining insulating structure Arc-confining structure for an electric circuit interrupter has an arc-exposed portion constructed of an electrical insulating material that is the thermosetting reaction product of the constituents of a mixture consisting essentially of the following con... | 10/24/1989 |
| 4778958 | Material for electric contacts having arc-quenching properties The material for electric contacts having arc-quenching properties comprises an irreversibly cured polymeric molding compound, which contains 5 to 20 volume percent of a metal powder and optionally contains up to 40 volume percent of an additional filler ... | 10/18/1988 |
| 4748301 | Electric circuit breaker arc chute composition A current limiting circuit breaker having a pair of separable contacts closely spaced for electrodynamic repulsion upon the occurrence of a short circuit overload condition utilizes an arc chute to cool and extinguish the arc that occurs when the contacts... | 05/31/1988 |
| 4733032 | Electric circuit breaker arc chute composition A current limiting circuit breaker having a pair of separable contacts closely spaced for electrodynamic repulsion upon the occurrence of a short circuit overload condition utilizes an arc chute to cool and extinguish the arc that occurs when the contacts... | 03/22/1988 |
| 4672157 | Low voltage circuit breaker with improved breaking A moulded case low voltage circuit breaker for high currents has no arcing contacts and is equipped with arc blow-out means drawing the arc very quickly away from the contacts. An insulating shield associated with the moving contact forms an arc formation... | 06/09/1987 |
| 4575598 | Circuit breaker The present invention relates to a circuit breaker comprising at least a pair of electrical contactors formed of conductors and contacts secured to the conductors for opening or closing an electric circuit in a container, light absorbers having opposed su... | 03/11/1986 |
| 4544908 | Fuse with electro-negative gas interrupting means There is provided by this invention a current limiting fuse having a fuse element wound about support means consisting of a non-stoichiometric oxide core that produces an electro-negative gas when heated by the melting fuse element. The generation of the ... | 10/01/1985 |
| 4521653 | Circuit breaker with arc light absorber The present invention relates to a circuit breaker with an arc light absorber comprising: a pair of electric contactors contained in an insulating container for opening or closing an electric circuit, electric conductors forming said electric contactors a... | 06/04/1985 |
| 4516002 | Circuit breaker with arc light absorber The present invention relates to a circuit breaker with an arc light absorber comprising: a pair of contactors contained in an insulating container for opening or closing an electric circuit, electric conductors forming said electric contactors and contac... | 05/07/1985 |
| 4516003 | Circuit breaker with arc light absorber A circuit breaker with an arc light absorber comprising: a pair of electric contactors contained in an insulating container for opening or closing an electric circuit, and having electric conductors and contacts provided on said conductors, and a pair of ... | 05/07/1985 |
| 4511773 | Molding composition for arc circuit breakers A ceramic useful as an electrically insulating material is produced by calcinating wollastonite powder, admixing the calcined powder with phosphoric acid of certain P2 O5 concentration range, die-pressing the resulting mixture, and f... | 04/16/1985 |
| 4444671 | Arc extinguishing material An arc quenching composition suitable for deionizing and extinguishing a high voltage electrical arc comprising an effective proportion of hexamethylenetetramine. Depending on the application in which the arc extinguishing composition is employed, the hex... | 04/24/1984 |
| 4436831 | Calcined member for arc-extinguishing chambers A calcined member for arc-extinguishing chambers which are installed in electromagnetic contactors and magnetic circuit breakers for high-voltage applications. The calcined member consists of an inorganic composite material obtained by molding and heat-tr... | 03/13/1984 |
| 4426549 | Track and erosion resistant electrical insulation comprising zinc borate and ethylene polymer Track and erosion resistant electrical insulating materials are disclosed comprising (a) a base insulating material comprising a polymer of ethylene and additives necessary to allow the polymer to function as electrical insulation, and (b) hydrated zinc b... | 01/17/1984 |
| 4413062 | Molding composition and product produced therefrom A ceramic useful as an electrically insulating material is produced by calcining wollastonite powder, admixing the calcined powder with phosphoric acid of certain P2 O5 concentration range, die-pressing the resulting mixture, and fir... | 11/01/1983 |
| 4367508 | Current limiter A current limiter which is electrically arranged in series with a circuit breaker, the current limiter having contacts which are movable with respect to one another in an axial direction. A spring having a nonlinear characteristic is provided for producin... | 01/04/1983 |
| 4340790 | Electrical switch with melamine loaded thermoplastic ablative material A separable connector module for live switching of shielded electrical power cable comprises a rod contact and a rod-shaped follower molded about a reinforcing pin fixed to one end of the rod contact. The follower is of thermoplastic ablative material con... | 07/20/1982 |
| 4278859 | Circuit breaker structure A circuit breaker structure having improved insulation means between the conductors which support the stationary and movable contacts to reduce or eliminate arc restriking conditions.... | 07/14/1981 |
| 4271339 | High voltage circuit switch arrangement A rapid opening and closing interrupter includes a stationary contact mounted in a cylindrical housing and a moving contact mounted on an operating rod by an opening spring. A trailer formed of a material that produces an arc quenching gas when exposed to... | 06/02/1981 |
| 4259196 | Asbestos-free compression molding compositions for thermal and electrical insulators Asbestos-free compression molding compositions suitable for thermal and electrical insulator products are disclosed. The compositions comprise mixtures of calcium magnesium ferro silicate particulate material in predominating amount, in combination with p... | 03/31/1981 |
| 4251699 | Arc extinguishing material comprising dicyandiamide An arc quenching composition suitable for deionizing and extinguishing a high voltage electrical arc comprising an effective proportion of dicyandiamide. Depending on the application in which the arc extinguishing composition is employed, the dicyandiamid... | 02/17/1981 |
| 4216406 | Electric lamp wherein the terminal socket cap contains a foamed cap cement which functions to prevent explosions and/or burning a hole through the cap An improved electric lamp of the type wherein a transparent bulb is sealed to a terminal socket cap and contains a foamed cap cement which substantially fills the interior of said terminal cap. The foamed cap cement contains a small amount of a halogen-co... | 08/05/1980 |
| 4192572 | Electrical connector apparatus Apparatus for connecting and disconnecting a male contact element and a high voltage cable includes a housing securable to the cable and defining an axial passage having a cavity, a piston assembly with a female contact element movable in the passage and ... | 03/11/1980 |
