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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7357656 | Electrical energy disconnection device A disconnection device is designed to separate a first portion of an electrical circuit electrically from a second portion of said circuit, the disconnection device including: at least one pair of contacts, one of which contacts is a moving contact, the pair of cont... | 04/15/2008 |
| 7138597 | Circuit breaker with arc gas propelled movable contact and opposed arc cutoff shutters The support for the moving contact of a circuit breaker has a piston that is driven by arc gases generated by initial separation of the contacts through magnetic repulsion to rapidly open the contacts. A pair of telescoping shield sleeves that have aligned openings ... | 11/21/2006 |
| 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 |
| 7071643 | Dual speed quad brush two pole motor system A motor system includes four brushes electrically connected to a rotor. A stator includes two magnetic poles. A circuit selectively rotates the rotor at a first speed by applying a first voltage to a first of the brushes and a second voltage to a second of the brush... | 07/04/2006 |
| 6919785 | Pressure sensitive trip mechanism for a rotary breaker A pressure sensitive trip mechanism for actuating a circuit breaker operating mechanism to trip a circuit breaker includes a trip lever and a trip bar. The trip lever is rotatable about a first pivot. The trip bar is positioned proximate the trip lever. The trip bar... | 07/19/2005 |
| 6414256 | Current limiting circuit breaker The present invention provides a current limiting circuit breaker having a current responsive device for opening a pair of contacts or switch upon short circuit conditions. The current responsive device utilizes an insulating object driven by a magnetic f... | 07/02/2002 |
| 6229426 | Circuit breaker having selected ambient temperature sensitivity A circuit breaker (10) is shown having a movable electrical contact (36) adapted to move into and out of engagement with a stationary electrical contact (38, 40). A current carrying thermostatic trip member (42) has a portion movable in response to change... | 05/08/2001 |
| 6084193 | Electrical circuit interruption device having improved arc extinguishing apparatus including an arc paddle A circuit interrupter in the form of a circuit breaker (10) is shown having a movable contact (14a) which moves between contacts engaged and contacts disengaged position relative to a stationary contact (16a). An arc paddle (20) is mounted in a housing (1... | 07/04/2000 |
| 5126517 | Arc suppressing current interrupter A current interrupter in which a first movable, insulating, gear carries a contact blade. The blade extends out from this movable gear and forms a contact which makes and breaks with a stationary contact upon movement of the gear. A second insulating gear... | 06/30/1992 |
| 5023415 | Switch apparatus A switch apparatus for use in a distribution system, having a case, a pair of bushings arranged on the case so as to oppose each other, and a breaker arranged in the case such that breaking and closing actions take place in a direction perpendicular to an... | 06/11/1991 |
| 4943691 | Low-voltage limiting circuit breaker with leaktight extinguishing chamber A current limiter comprises an extinguishing chamber 16 of small volume, in which there are housed a pair of contacts 28, 30 and an insulating shield 40, capable of moving to an active position inserted between the contacts 28, 30, and of subdividing the ... | 07/24/1990 |
| 4935165 | Method for preventing the poor conduction at electrical switch contacts which is caused by organopolysiloxane gas The poor electrical conduction at an electrical switch contact caused by organopolysiloxane gas can be prevented by providing that a nitrogenous base gas be simultaneously present with the organopolysiloxane gas. Nitrogeneous base gases can be aliphatic a... | 06/19/1990 |
| 4880948 | Contactor device for circuit breaker A contactor device for a circuit breaker includes a stationary contactor having a stationary contact, and a stationary conductor secured with the stationary contact and constituting an electricity path extending from an external terminal to the stationary... | 11/14/1989 |
| 4849591 | Protection cutting apparatus provided with an arc breaking screen Electromechanical protection cutting apparatus comprising a magnetic tripping device and an arc-breaking screen which may be interleaved between at least one fixed contact and one movable contact during an opening caused by the tripping device. The stop (... | 07/18/1989 |
| 4801772 | Current limiting circuit interrupter with insulating wedge A current limiting circuit interrupter with insulating wedge characterized by a circuit interrupter structure within an insulating housing and having a mechanism for opening and closing separable contacts, the contacts being separately mounted on contact ... | 01/31/1989 |
| 4788392 | Tank type gas circuit breaker A tank type gas circuit breaker for a three-phase alternating current, comprises: three hollow members spaced in parallel with each other; a single stationary side end plate air-tightly fixed to first ends of the three hollow members; a single mechanism s... | 11/29/1988 |
| 4752660 | Current limiting circuit breaker with an arc shearing plate A circuit breaker includes an arc shearing plate which is driven to thrust between a pair of contacts being separated so as to shear an arc formed therebetween for rapid arc extinction. Included in the circuit breaker is an over-current responsive actuati... | 06/21/1988 |
| 4751483 | Electric switch for protection appliances such as a cut out An electric switch protective apparatus is provided having a mobile contact which may be separated from a pseudo-fixed contact to which it is applied, either through the movement of coupling means of the mobile contact, or through the lateral movement mad... | 06/14/1988 |
| 4727230 | Safety switch for inductively driven electromagnetic projectile launchers A safety switch for use in an inductively driven electromagnetic launcher system includes three tubular conductors each having a substantially cylindrical internal surface, wherein these internal surfaces have substantially the same internal diameter and ... | 02/23/1988 |
| 4716266 | Electrical arc quenching chamber, in particular for fluid-quenched circuit breakers The present invention relates to an electrical arc interruption chamber, in particular for fluid-quenched circuit breakers, in which, inside a tightly sealed insulating encasing, containing an arc-quenching gas, provided are current-bearing connections, r... | 12/29/1987 |
| 4700030 | Switch device having an insulating screen inserted between the contacts during breaking An electric switch in which a screen is inserted very quickly between two contacts at the moment when they part. The energy of the arc generated between the contacts inside a volume surrounded by an insulating mobile sheath is used to heat gases released,... | 10/13/1987 |
| 4692577 | Switch for a high-voltage interrupting module An energy-absorbing element is provided between an insulative piston and a movable contact of a switch for a high-voltage device. In arrangements where a fusible element is in electrical shunt with the switch, the energy-absorbing element improves the rap... | 09/08/1987 |
| 4691085 | High voltage interrupting switch with improved contact connection arrangement and method An improved high-voltage interrupting switch or interrupter and method of assembly and operation thereof is provided. The switch is of the type including a pair of contacts which are normally electrically interconnected and which are rapidly driven apart ... | 09/01/1987 |
| 4677266 | Switch device having an insulating screen inserted between the contacts during breaking A switch in which a screen inserted between the contacts shears the opening arc. The screen is associated with a sheath that surrounds a contact support and slides on the latter when the gas pressure it is subjected to causes it to move at a velocity whic... | 06/30/1987 |
| 4659887 | Switch device having an insulating screen inserted between the contacts during breaking A screened electric switch in which the screen is inserted at high speed between the contacts and in which a mobile shutter with a sealing surface basically fixed relatively to the housing drives the screen with a speed which is a function of the energy o... | 04/21/1987 |
| 4659888 | Switch device having an insulating screen inserted between the contacts during breaking An electric switch is provided using an isolating screen for destabilizing the arc. The pieces supporting the contacts are equipped with conducting extensions whose conformation and orientation allow the feet of the arc to circulate there without becoming... | 04/21/1987 |
| 4647741 | Switching device with antiarcing screen The disclosure relates to a switching device which comprises a casing provided with an input terminal, an output terminal and, therebetween, an electric circuit including at least two separable contacts as well as a rotary screen presenting an interposabl... | 03/03/1987 |
| 4635022 | Fuse cut-out cartridge A fuse cartridge for example of the cylindrical type comprising an insulating cylindrical body ending in two conducting end pieces and a fuse element connected electrically to the end pieces, further comprising two pistons housed in the body which are mov... | 01/06/1987 |
| 4631508 | Electro-mechanical devices incorporating fuse cartridges An electro-mechanical circuit breaker device incorporating a fuse cartridge, wherein two contact bars are normally connected by a series of mobile contacts held against their lower edge by springs, two in number for each. An insulating plate, suitably gui... | 12/23/1986 |
| 4596911 | Combined device for on-load breaking and visible isolation of an electric circuit A combined isolating switch-circuit breaker comprising at least one fixed contact breaking element, one fixed isolating contact element and at least one mobile assembly comprising a mobile contact breaking element electrically connected to a mobile isolat... | 06/24/1986 |
| 4594489 | Electrical switching element The load-isolating switch comprises two coaxial electrodes 1 and 2, which are mechanically connected by an interposed insulator 3. A cam 4 is provided on the insulator 3 and is spanned by at least one contact bridge 5, which is axially displaceable by an ... | 06/10/1986 |
| 4572933 | Pressure-operated switch for a high-voltage interrupting module An improved switch for a high-voltage device in which ignition of a power cartridge moves an insulative piston located in a conductive member away therefrom and into a passageway in an insulative liner. The piston moves a contact through the passageway an... | 02/25/1986 |
| 4562323 | Switch device having an insulating screen inserted between the contacts during breaking and means for shearing the arc between this screen and an insulating wall A switch device is provided comprising means for controlling the separation of the contacts and for inserting an electrically insulating screen between the contacts during opening thereof, said screen cooperating with an electrically insulating surface fo... | 12/31/1985 |
| 4553008 | Load interrupter An load interrupter is disclosed having the characteristics of an ordinary puffer interrupter and a self-extinguishing gas flow interrupter. The load interrupter comprises a generally hollow cylinder which is adapted to be filled with an arc extinguishing... | 11/12/1985 |
| 4536630 | Limiting switch A current limiting switch is provided comprising two mobile levers subjected to the action of springs which apply, one against the other, separable contact pieces placed at the respective ends thereof; a thin electrically insulating screen placed between ... | 08/20/1985 |
| 4534263 | Electromagnetic launcher with high repetition rate switch An electromagnetic projectile launcher is provided with a cartridge-type switch for commutating current from a high current source to a pair of generally parallel conductive rails. A conductive cartridge switch in sliding electrical contact with the rails... | 08/13/1985 |
| 4510360 | Circuit breaker with arc shield A circuit breaker with an arc shield characterized by a movable contact assembly which is rotatable between open and closed positions with respect to stationary contacts, and a cylindrical arc shield mounted on the assembly and rotatable therewith.... | 04/09/1985 |
| 4471187 | Gas-blast switch A gas-blast switch or circuit-interrupter contains a fixed set of contacts and a movable set of contacts. Each contact set possesses an arc contact and a rated current contact coaxially surrounding the related arc contact. Operatively associated and co-mo... | 09/11/1984 |
| 4467298 | Automatic short-circuit current limiting device A device is provided comprising a simple means for holding the contacts apart and insulated from each other after circuit breaking. A screen formed by an insulating plate of small thickness, is placed between two mobile contact levers and is urged by springs a... | 08/21/1984 |
| 4458225 | Circuit breaker with independent magnetic and thermal responsive contact separation means A molded case circuit breaker having a movable contact arm (12) pivotally supported on a operating handle (4) and driven into and out of engagement with a stationary contact (6) by an overcenter toggle spring (28) stretched between the movable contact arm... | 07/03/1984 |
