Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 8169282 | Switch and electronic device A switch and an electronic device maintain a power supply ON state until data processing is completed, and automatically turn OFF the power supply after the data processing is completed. The switch includes a rotation operating body that does not receive an operatio... | 05/01/2012 |
| 7733202 | Electromagnetic switching device An electromagnetic switching device is disclosed with an electromagnet and a movable magnet armature, which is mounted in the switching device with a resetting force, which counteracts the closing force, is different than zero in an OPEN position and is formed at le... | 06/08/2010 |
| 7663457 | Magnetic latch for a voice coil actuator Magnetically latching and releasing a voice coil actuator for controlling electrical switchgear. The voice coil actuator includes a voice coil magnet disposed on a common longitudinal axis with respect to a voice coil assembly. A coil of the voice coil assembly exer... | 02/16/2010 |
| 7598830 | Electromagnetic coil apparatus employing a magnetic flux enhancer, and accessory and electrical switching apparatus employing the same An electromagnetic coil apparatus includes a ferrous coil frame having a first end and a second end opposite the first end. A coil assembly includes a conduit, a number of coils within the ferrous coil frame and being disposed on the conduit, and a ferrous plunger m... | 10/06/2009 |
| 7468646 | Bi-stable magnetic latch assembly A bi-stable magnetic switch assembly is provided that comprises a stator and a rotor, which is configured for rotation with respect to the stator between a first latched position and a second latched position. The stator and the rotor cooperate to form a first magne... | 12/23/2008 |
| 7330091 | Electronic type protective relay An electronic type protective relay integrates the mechanical structure into a single operation rod to protect electric machinery. The electronic type protective relay includes an insulating shell, a tripping rod, a magnetic-force device and an operation device. The... | 02/12/2008 |
| 7283027 | Electric switching device, relay, socket and electric apparatuses comprising such a device Switching device comprising a contact block having a fixed part connected to at least one electric terminal and having at least one electric contact zone able to be in contact with a contact zone of a movable part, an actuating device enabling the movable part to be... | 10/16/2007 |
| 7236071 | Medium voltage vacuum contactor A medium voltage vacuum contactor comprising for each pole, a vacuum envelope which contains a fixed contact and a corresponding movable contact; and actuating means providing the energy required to move the movable contacts, characterized in that said actuating mea... | 06/26/2007 |
| 7233220 | Electrical switching device, relay and electrical apparatus comprising same The electrical switching device comprises at least a first part comprising at least a first magnetizable element and a first contact zone associated with said first magnetizable element, and at least a second movable part comprising at least a second magnetic elemen... | 06/19/2007 |
| 7221248 | Solenoid with noise reduction A solenoid having a housing and a coil disposed in the housing for generating a magnetic field when an electric current passes through the coil. A center pole is disposed within the coil, and the center pole is made of a ferromagnetic material. A rod assembly is mov... | 05/22/2007 |
| 7201096 | Linear motor having a magnetically biased neutral position A linear motor is provided including a stator having at least one electromagnetic coil and a rotor having at least one permanent magnet. The rotor is movable toward at least a first position when least one electromagnetic coil is energized and solely magnetically bi... | 04/10/2007 |
| 7170375 | Permanent-magnet ground fault circuit interrupter plug and its permanent-magnet mechanism therein A permanent-magnet ground fault circuit interrupter plug with self-diagnosing function having an enclosure and a permanent-magnet mechanism encased in the enclosure. In one embodiment, the permanent-magnet mechanism includes a frame assembly having a crossbeam, a fr... | 01/30/2007 |
| 7142078 | Magnetic levitation actuator A magnetic actuator including a mobile magnetic part, a fixed magnetic part, and a mechanism for triggering displacement of the mobile magnetic part relatively to the fixed magnetic part. At least two amagnetic supports, placed in different planes, delimit a gap bet... | 11/28/2006 |
| 7138894 | Electromagnetic breaker An electromagnetic breaker includes a housing (10) having two conductors (30, 31), and a slidable conductor (40) slidably disposed in the housing (10) and movable to engage with the conductors (30, 31) and to electrically couple th... | 11/21/2006 |
| 7069941 | Electronic faucets for long-term operation An electronic faucet (10) mounted on a countertop (12) includes a housing, at least one fluid inlet line (24a, 24b) extending into the housing, a fluid outlet (46) from the housing, a solenoid (142, 143) for op... | 07/04/2006 |
| 6975191 | Resettable switching device A resettable switching device, e.g. a relay, comprises a fixed contact (18) and a movable contact (28). A solenoid (12) is fixed relative to the fixed contact and a ferromagnetic plunger (20) carries the movable contact. A spring (24 | 12/13/2005 |
| 6972535 | Controller for motor A controller is disclosed for a motor. The motor includes a first terminal and a second terminal. In a positive mode, the first terminal is connected with the positive electrode of a power supply, and the second terminal is connected with the negative electrode of t... | 12/06/2005 |
| 6967550 | Electromagnetic regulating device An electromagnetic regulating device with a movable actuator (42), especially a piston, having an engagement region (44) on an end thereof, and a coil device (34, 36), which is stationary relative to the actuator and which is designed to exert a... | 11/22/2005 |
| 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 |
| 6906605 | Electromagnet system for a switch An electromagnet system for a switch includes a main magnetic circuit including a magnet yoke and a magnet armature mechanically linked to a contact apparatus. At least one permanent magnet is disposed in the main magnetic circuit for generating a holding force for ... | 06/14/2005 |
| 6831535 | Bistable electromagnetic relay There is disclosed an electromagnetic relay comprising a stationary first member and a second member adapted to move towards and away from the first member such that when the second member move towards the first member an electrical contact is closed. Spring means b... | 12/14/2004 |
| 6794968 | Magnetic latching contactor A contactor assembly includes a stationary assembly, a movable assembly that is slidably coupled with the stationary assembly, and a contact assembly coupled within the stationary assembly and the movable assembly. The contact assembly is movable between a first swi... | 09/21/2004 |
| 6677842 | Load disconnecting switch especially for use in motor vehicles A load-disconnecting switch has a permanent-magnetic holding circuit. A coil (5), upon excitation thereof, generates a magnetic flux that is opposite to the magnetic flux of the permanent magnet (9). The armature (6) is biassed to an open position by an a... | 01/13/2004 |
| 6538541 | Bistable contactor A bistable contactor comprises at least two concentrically arranged coils, an armature that is movable relative to the coils, a permanent magnet that is stationary relative to the coils, and a spring element. The armature includes contacts for opening and... | 03/25/2003 |
| 6492887 | Miniaturized flat spool relay The invention relates to a microrelay comprising a magnetic spool, a contact support body (2) within which contacts are arranged, a permanent magnet (32) and an armature (31) which is tiltable around it's axis between two positions, as well as a spring-lo... | 12/10/2002 |
| 6472964 | Magnetic trip A magnetic trip with a fixed magnetic circuit polarised by a permanent magnet. The magnetic circuit includes two preferably identical parallel wafers each defining a main branch and a deflection tab with the presence of a coil on each branch. At their end... | 10/29/2002 |
| 6467987 | Resettable non-explosive actuator A non-explosive actuator includes a housing, a push rod extending into one end of the housing and a plurality of dogs within the housing. A plunger is inserted into an opposite end of the housing and the push rod is depressed and locked in place. Depressi... | 10/22/2002 |
| 6424244 | Magnetic switch The invention relates to a magnetic switch having a yoke which has the shape of a rotationally symmetrical cup on the base of which is arranged a permanent magnet. The flux of the permanent magnet is conducted via a core, which has a radial core flange, t... | 07/23/2002 |
| 6313445 | Control for an electrical kitchen appliance with power interruption off feature An electric appliance control comprising an electromagnet; an electrical switch assembly; a ferromagnetic section movable with a contact of the switch assembly towards the electromagnet; and a user actuated member adapted to move the ferromagnetic section... | 11/06/2001 |
| 6262648 | Electromagnetic actuator Electromagnetic actuator for moving a contact into a switched-on or switched-off state, comprising a contact-actuating rod which is displaceable in the longitudinal direction between a first position, corresponding to the switched-off state, and a second ... | 07/17/2001 |
| 6218921 | Adjustable flux transfer shunt trip actuator and electric power switch incorporating same A flux transfer shunt trip actuator has an elongated seat member extending between the legs of a U-shaped magnetically permeable frame member. A plunger is magnetically latched against the seat formed by the seat member in a retracted position by permanen... | 04/17/2001 |
| 6124771 | Switch with a rocker, which has an affixed magnet The present invention relates to a switch with a rocker, which has an affixed magnet, capable of being reliably opened or closed by a mechanical operation of a magnetized rocker. The present invention comprises of a supporting plate and a plurality of ele... | 09/26/2000 |
| 6043730 | Electromagnetic actuator An electromagnetic actuator has an iron core around which a coil is wound; two permanent magnets, the same poles of which are placed on the ends of the core which extend beyond the coil and which have the same direction of polarity; magnetic poles formed ... | 03/28/2000 |
| 6031437 | Switch with electromagnetic command A switching apparatus including an electromagnetic command device fitted with a magnetic circuit made up of a main circuit polarized by a permanent magnet and linked to a depolarizing coil and through a movable circuit integral with a movable support subj... | 02/29/2000 |
| 6005459 | Switching device A switching device providing highly-reliable, frictionless, adjustment-free operation is described. Comprised of a comparatively small number of moving parts, the various aspects of the invention offer compact, cost-effective, reliable alternatives to the... | 12/21/1999 |
| 5959519 | Electromagnetic switching device A switch device including an inner yoke and an outer yoke are arranged around the winding of an electromagnetic block, and a plate-shaped permanent magnet is inserted between the two yokes. A highly efficient actuation of the switching device is achieved ... | 09/28/1999 |
| 5949315 | Polarized relay A polarized relay with an electromagnet which consists of an exciter coil and a coil core mounted in the exciter coil. On each of two end sides of the electromagnet is a permanent magnet displaceable along its magnetic axis. The same pole, for example, th... | 09/07/1999 |
| 5923748 | Telephone device for preventing a long-term on-line state resulting from the handset being unintentionally off-hook A telephone device for preventing a long-term on-line state resulting from the handset being unintentionally left off-hook. The device preferably includes: a telephone line interface circuit serving as an interface between a ring line and a tip line, and ... | 07/13/1999 |
| 5903203 | Electromechanical switch An electromechanical switch including a non-magnetic cup shaped housing, the interior of which is sealed from the atmosphere with a seal assembly. A first electric terminal extends through the seal assembly and is connected to a coil spring. A second term... | 05/11/1999 |
| 5883557 | Magnetically latching solenoid apparatus A magnetically latching solenoid apparatus is characterized by a non-magnetic armature carrying a permanent magnet having poles aligned with the throw axis of the device. The poles of the magnet are substantially aligned with corresponding pole pieces and... | 03/16/1999 |
