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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 8129648 | Surge arrester having thermal overload protection An overvoltage arrester includes at least two electrodes and a melt element that connects one of the electrodes to an outer terminal of the overvoltage arrester. An extinguishing device is designed to extinguish an electric arc. ... | 03/06/2012 |
| 8115134 | Arc extinguishing resin processed article and circuit breaker using the same An arc extinguishing resin processed article having excellent flame retardancy is disclosed, in which the contribution to rise in inner pressure is small, a pyrolysis gas that can efficiently extinguish an arc generated upon the interruption of a circuit can be gene... | 02/14/2012 |
| 8089023 | Arc-extinguishing processed resin article and circuit breaker that uses same An arc-extinguishing processed resin article is disclosed that exhibits an excellent arc-extinguishing behavior, heat resistance, pressure resistance, and molding processability, and a circuit breaker that uses this arc-extinguishing processed resin article are prov... | 01/03/2012 |
| 7893380 | Arc-extinguishing composition and articles manufactured therefrom An arc-interrupting compound, such as melamine, and to a method of extinguishing an arc by disposing the composition along the path of the arc, for contacting the arc. In one embodiment, the binder, or at least a portion of the binder, is a polymer that contains a f... | 02/22/2011 |
| 7321281 | Hermetically sealed relay having low permeability plastic housing A high voltage relay comprises a hermitically sealed housing made of ethylene vinyl alcohol (EVOH) and having internal components for changing the state of said relay. Terminals are electrically connected to the internal components for connection to external circuit... | 01/22/2008 |
| 7259646 | Electrical service device having an arc prechamber area, prechamber plates and a current-limiting arc-quenching device The invention proposes an electrical service device, in particular line circuit breaker or motor circuit breaker, having a housing having connection means (20, 21) for the purpose of connecting busbars and/or connection lines on at least one end side, having ... | 08/21/2007 |
| 7186941 | Arc extinguisher assembly for molded case circuit breaker An arc extinguisher assembly is provided for a mould cased circuit breaker capable of reducing time for arc extinguishing and preventing contacts from being damaged due to a back flow of an arc. To this end, the arc extinguisher assembly for a mould cased circuit br... | 03/06/2007 |
| 7176771 | Circuit breaker filter assembly An improved filter assembly for a circuit breaker includes a generally rectilinear filter housing having at least two filter mounting zones for receiving at least two filter assemblies, so as to define, in the aggregate, a filter assembly, and at least two filter as... | 02/13/2007 |
| 6631058 | Method and apparatus for reducing arc retrogression in a circuit interrupter A technique for reducing arc retrogression in a circuit interrupter includes providing a source material in a parallel current carrying path in the interrupter. The source material and parallel current carrying path support no current during normal operat... | 10/07/2003 |
| 6594126 | Method and apparatus for extinguishing an arc through material surface ablation A technique is provided for forcing greater voltage investment in an arc developed during interruption of a current carrying path. A source element is provided in a secondary current carrying path parallel to a primary path through the device. Upon interr... | 07/15/2003 |
| 6570481 | Circuit breaker The invention relates to a circuit breaker having a crossbar (7) that is supported swingably onto a base (1B) to hold swingably movable contacts (4), and has the small reduction of overtravel in the elapsed years, and can reduce its size. The bending modu... | 05/27/2003 |
| 6565983 | Electrical contact element and use of the contact element An electrical contact element for electrically connecting an electric device and providing current transmission in an electric device wherein the electrical contact element comprises a metallic body, and wherein at least one contact surface, present on th... | 05/20/2003 |
| 6361848 | Organic and inorganic complex compound and switch using same A switch having a molded article of which the entirety or a part is composed of an organic and inorganic complex composition is provided, wherein the base inside of the base of a box is composed of for example an organic and inorganic complex composition ... | 03/26/2002 |
| 6288621 | Pole for an electrical circuit breaker, equipped with a wide arc extinguishing chamber An electrical circuit breaker pole comprises an arc extinguishing chamber with two side flanges, a rear wall, separators, a front opening, a lower arcing horn electrically connected to the stationary contact and an upper arcing horn. The rear part of the ... | 09/11/2001 |
| 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 |
| 5990440 | Switch and arc extinguishing material for use therein A switch containing a switch case, contacts adapted to be opened and closed, an arc extinguishing chamber disposed in the vicinity of the contacts, and an arc extinguishing material capable of reducing the amount of metal particles and free carbons to be ... | 11/23/1999 |
| 5907270 | Current-limiting switch A current-limiting switch, with current connections and contacts, at least one of which is movable, having an associated drive, for opening the moving contact when a predefined electric current intensity is exceeded, are provided. The drive is a thermoele... | 05/25/1999 |
| 5847630 | Compact circuit breaker incorporating a polymer current limiter A compact current limiting circuit breaker utilizes a polymer current limiter, an arc rail and an arc gap for effective overcurrent protection. Upon the occurrence of contact separation an arc is drawn between the circuit breaker contacts and driven towar... | 12/08/1998 |
| 5841088 | Switch and arc extinguishing material for use therein A switch comprising a switch case, contacts adapted to be opened and closed, an arc extinguishing chamber disposed in the vicinity of the contacts, and an arc extinguishing material capable of reducing the amount of metal particles and free carbons to be ... | 11/24/1998 |
| 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 |
| 5753877 | Circuit breaker terminal tubulator protection assembly for diverting discharged ionized gasses An electrically insulated turbulator for use in an electrical device for automatically interrupting an overload current is a one-piece molded assembly with an arcuate portion arranged around a terminal screw and a downwardly turned flange for shielding th... | 05/19/1998 |
| 5608198 | Circuit breaker arrangement for protection against electrical arcs An arrangement in an electrical switching device for protection against electrical arcs comprises a tripping mechanism, a stationary contact carrier, a movable contact carrier, an exhaust vent, an arc runner, and an arc extinguishing barrier. The stationa... | 03/04/1997 |
| 5463199 | DC-rated circuit breaker with arc suppressor A circuit breaker having an arc chute adjacent the arc path between a fixed and a movable contact. To aid in extinguishing the arc under short circuit conditions, an arc suppressor element is fixed on a movable surface adjacent the movable contact; and pr... | 10/31/1995 |
| 4845460 | Multipole low-voltage circuit breaker with an insulating material housing and arc-quenching chambers A multipole low-voltage circuit breaker with an insulating material housing and arc quenching chambers. By a new mechanical design, the installation of the arc quenching devices is to be facilitated. All arc quenching chambers of a switchgear are arranged... | 07/04/1989 |
| 4585912 | Circuit breaker, particularly line-protective circuit breaker A circuit breaker, and particularly, though not exclusively, an automatic cut-out or line-protective circuit breaker, which includes a housing, an electric arc chamber arranged within the housing, a fixed contact and a movable contact located in the arc c... | 04/29/1986 |
| 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 |
| 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 |
| 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 |
| 4320377 | Arc gas control device for a power class fuse having load break contacts A power class fuse comprises an insulative canister having a female load break contact at a closed end of the canister and a male load break contact, coupled electrically to a fuse element. The male load break contact is inserted into the canister for eng... | 03/16/1982 |
| 4268811 | Circuit interrupting device A circuit interrupting device is disclosed. A stationary contact is mounted within a stationary hollow insulator and connected to one side of an electrical circuit. A movable contact normally engages the stationary contact and is mounted for movement with... | 05/19/1981 |
| 4170394 | High voltage separable connector system with modified dwell position A separable electrical connector assembly includes mating rod connector and bore switch modules. The bore switch module includes a grasping bore contact member for electrically engaging with a rod contact member which is included in the rod connector modu... | 10/09/1979 |
| 4131329 | Current interchange for a gas actuated bushing A high voltage bushing for an electrical device such as a transformer, the bushing including a fixed cylindrical conductor and a gas actuated bore contact mounted for reciprocal movement in the conductor and a fixed current interchange device in the form ... | 12/26/1978 |
| 4119358 | Electrical connector switching module A connector module for loadbreak operation having an insulating housing and a switch insert. The insert includes a container with a major portion of uniform diameter and a configuration such that the diameter does not increase from its outer end to its in... | 10/10/1978 |
| 4072832 | Control electrode for high-voltage apparatus The invention is directed to a control electrode for high-voltage apparatus which alters the electric field in the vicinity of the voltage-carrying parts. The control electrode includes a formed body of a conductive plastic foam material. The control elec... | 02/07/1978 |
| 4052555 | Gaseous dielectric compositions Perfluorinated ethers evidence useful properties as gaseous dielectrics and do not exhibit a high carbon tracking tendency, which is commonly a problem with halogenated alkanes. Mixtures of the perfluorinated ethers with SF6 and/or CO2 | 10/04/1977 |
| 4019006 | Overcurrent and short circuit protection device An electric overcurrent and short-circuit protection device which utilizes a pair of horn electrodes with a fusible conductor connected therebetween. The electrodes are arranged, together with suitably adapted insulating walls to form a first arc-quenchin... | 04/19/1977 |
| 4008943 | High voltage cable terminator having a fault actuated probe A quick-make, quick-break probe contact assembly for connecting a high voltage cable to a high voltage bushing, the probe contact assembly being mounted in a cable terminator and including a movable section responsive to either an arc-generated arc-exting... | 02/22/1977 |
| 3958855 | Electrical connector An electrical termination for use with a high voltage underground cable system wherein a large degree of arcing may occur between two electrical structures as they are brought together under short circuit conditions to complete a live high voltage circuit... | 05/25/1976 |
| 3930709 | Electrical connector An electrical connector includes complementary contact elements, one contact element being supported for axial movement in its housing as part of a contact assembly also including a piston and a member evolving arc-quenching gas upon being subjected to an... | 01/06/1976 |
