Class 218/23 - Permanent magnet

Subclass of Class 218 - High-voltage switches with arc preventing or extinguishing devices
Definition: Subject matter comprising a piece of hardened magnetized
No. of patents: 30
Last issue date: 08/26/2008

Number	Title	Issue Date
7417520	Contactor for direct current and alternating current operation The invention relates to a contactor for direct current and alternating current operation with at least one contact point with a fixed contact and a movable contact, at least one permanent magnet, arranged adjacent to the contact point, for the generation of a perma...	08/26/2008
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
7187258	Circuit breaker A circuit breaker includes an elongated movable contact having a contact at one end thereof for flowing a current therethrough and the other end rotatably supported with a holder, and a protection cover made of an insulating material for covering and protecting a mo...	03/06/2007
7145422	DC relay A direct current relay includes a plurality of contact pairs, and a plurality of magnets (5). Each of the plurality of contact pairs is configured having contacts (21, 22, 31) with contact regions (21a, 22a, 31a	12/05/2006
6943313	Rotating arc fault-current interrupter A rotating arc fault-current interrupter, also known as an arc spinner interrupter, is provided that establishes an easily visible open gap via a movable blade member having a first portion for engaging a stationary main contact and a second portion formed by an arc...	09/13/2005
6911610	Medium voltage switching device A medium voltage switching device includes an electromagnetic actuation chain and a power supply which provides electric power to the electromagnetic actuation chain. The power supply includes at least a first power supply device which is electrically connected to a...	06/28/2005
6331687	Control method and device for a switchgear actuator A current interrupter (4) includes a current interrupting device (4) having at least one movable contact (71); an actuator (8) coupled to the movable contact (71) of the current interrupter (4); a feedback sensor (14) for monitoring movement of the actuat...	12/18/2001
5464956	Rotating arc interrupter for loadbreak switch A loadbreak switch is provided that utilizes a pivotally mounted movable jaw contact and a main stationary contact that is positioned in the middle of an arc runner. For operation at voltages 15 kV and above, the switch utilizes a shunt contact that bridg...	11/07/1995
5132497	Magnetic shielding means for a current sensor of direct current switching apparatus A Hall effect device is located in a focused gap of a flux concentrator disposed over one power terminal of a D.C. switching contactor to monitor flux induced by current flow. Magnetic fields from permanent magnets of the switching apparatus are shielded ...	07/21/1992
5072082	Electromagnetically locked contact blade A high voltage ground blade assembly which has a folding member to aid in breaking ice and lowering the force to operate the blade assembly in combination with an electric coil which creates an electromagnetic force to prevent the folding member from movi...	12/10/1991
5057655	Electrical circuit breaker with self-extinguishing expansion and insulating gas An inside of tubular contacts of a self-extinguishing expansion SF6 -gas circuit breaker including guiding ribs arranged to oppose any vortex-effect swirling gas flow between a first extinguishing chamber and a second expansion chamber. The pre...	10/15/1991
4786770	Switchgear A switchgear comprises in a housing containing an arc extinguishing gas, a pair of separable contacts defining therebetween an arcing region in which an electric arc is generated when the contacts are separated. A cylindrical wall and an insulating nozzle...	11/22/1988
4737607	Electrical circuit breaker with self-expansion and rotating arc An electrical circuit breaker with self-expansion and rotating arc insulated with SF6 comprises a fixed arcing contact secured to the front face of a magnetic blow-out coil. An electrode is electrically insulated from the fixed arcing contact and covers t...	04/12/1988
4665288	Compressed gas switch A compressed gas switch, preferably provided for switching medium voltages, has a casing filled with insulating gas. Two contacts are located relative to one another along an axis in this casing, which contacts, in the switched-on position, have their fre...	05/12/1987
4575599	Spiral arc circuit breaker A spiral arc circuit breaker is disclosed in which the arc created between breaker electrodes at the time of circuit breaking is confined inside a longitudinally-extending annular gap. Magnetic fluxes having directions perpendicular to the longitudinal ax...	03/11/1986
4560848	Circuit breaker of spiral arc type A circuit breaker comprising a cylindrical fixed contact, a cylindrical movable contact and a magnetic field producing means which renders the arc current spiral when created in a space between the fixed and movable contacts in the open-contact state, whe...	12/24/1985
4529853	Electric circuit breaker with self blow-out by rotation of the arc A single pressure sulfur hexafluoride circuit breaker has ring-shaped arcing contacts fixed relative to one another and a magnetic coil electrically connected in the arcing circuit to create a magnetic field for spinning an arc between the arcing contacts...	07/16/1985
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
4503302	Arc interrupter An electric switch has an arc interrupter mounted in a housing between two main conductors. The interrupter comprises a fixed contact having a first arcing surface, a fixed electrode having a second arcing surface, an arc-driving coil and a movable contac...	03/05/1985
4488023	Rotary-arc type gas-filled switch A gas-filled switch with an improved arc extinguishing characteristics. Such gas-filled switch comprises a gas-filled casing, a pair of electrodes disposed in the casing, a conductive retaining ring which encircles at least one of the electrodes, a perman...	12/11/1984
4459446	Contact arrangement for a switch A configuration for a contact arrangement is disclosed for a switch having two coaxially positioned and generally cylindrical contacts. Each contact contains a coaxial core of ferromagnetic material, and a current-carrying envelope surrounding the core ha...	07/10/1984
4451718	Circuit breaker The present invention combines the provision of arc shields surrounding the contacts of a circuit breaker with a magnetic driving means to raise the arc voltage of an arc drawn across the contacts and to effectively drive the arc, whereby the performance ...	05/29/1984
4414450	High voltage power switch A high voltage power switch for alternating current has a stationary, hollow contact, an axially displaceable contact, a nozzle through which compressed gas is directed into an expansion chamber, and a cylindrical coil. The coil is connected at one of its...	11/08/1983
4404443	Electromagnetic relay An improved relay for increasing the service life of contacts and the breaking capacity. Each fixed contact is mounted on a solid parallelepipedal block having a hollowed-out portion for receiving the end of the corresponding connection rod and providing ...	09/13/1983
4346273	Circuit-interrupter having a high-frequency transverse magnetic field to assist in arc interruption An improved circuit-interrupter is provided having a high-frequency transverse magnetic field to assist in the very rapid interruption of the arc, which is established during operation of the device, said magnetic field being preferably of the three-phase...	08/24/1982
4302644	Contact breaker with magnetic arc blowing An electrical contact breaker has a stationary contact, and a movable contact. The movable contact is connected to a terminal by a flexible conductor. For blowing out the arc formed when the contacts separate under load, there is a blowing means including...	11/24/1981
4301340	Electrical switchgear A pair of switches are disposed adjacent one another in a housing which contains the highly insulating gas sulphur hexafluoride. In a closed position of each switch, a pivotable contact arm engages fixed contact fingers to permit the flow of load current ...	11/17/1981
4160140	Contact arrangement for pressurized-gas circuit breaker A contact arrangement for use with a pressurized-gas circuit breaker wherein the nozzle arrangement is provided with a nozzle-shaped arc electrode having an annular slot disposed between its interior and exterior surfaces, and with an annular body of ferr...	07/03/1979
4151391	Contact arrangement for a pressurized gas circuit breaker A contact arrangement for a pressurized-gas circuit braker, wherein the contact arrangement comprises a first tubular contact member and a second tubular contact member axially arranged therewith. The contact arrangement is further provided with a hollow ...	04/24/1979
3953694	Magnetic-blast arc extinguishing device having permanent magnets An arc-extinguishing device having a pair of separable electrodes to draw an arc therebetween. A permanent magnet is associated with each electrode and the magnetic fields produced by the magnets are additive to rapidly transfer the arc to diverging parts...	04/27/1976

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Class 218/23 - Permanent magnet