Electrodynamically Actuated Patents (Class 335/147)
  • Patent number: 9698678
    Abstract: A circuitry for regulating a current for an electromechanical load comprises a first connection and a second connection for the electromechanical load. The first connection can be coupled to a first supply potential thereby, and a potential of the second connection can be modified by means of a pulse width modulation. The circuitry also comprises a measurement assembly having a first measurement signal input, which is coupled to the first connection and a second measurement signal input, which is coupled to the second connection. The measurement assembly is designed thereby to determine a measurement signal that is proportional to a potential difference between the first and second connection, in order to regulate the current for the electromechanical load on the basis of the measurement signal.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: July 4, 2017
    Assignee: ZF Friedrichshafen AG
    Inventors: Matthias Schunk, Matthias Gnan
  • Patent number: 9203230
    Abstract: The invention relates to a line protection switch (1) for protecting an electrical load circuit from an over-current which exceeds a permissible load current. In order to provide a structurally simple, compact and rapidly actuating line protection switch, it is provided with a switching member (6) which can be moved from an operating position into a protection position. Contact elements (2A, 2C) of the line protection switch (1) which can be connected to the load circuit are closed in the operating position and opened in the protection position. The line protection switch (1) according to the invention further has a retention member (10) which produces a magnetic retention field (MH) which is independent of the load current and by means of which the switching member (6) is retained in the operating position, and a counter-force member (14) which is independent of the load current and by means of which the switching member (6) is retained in the protection position.
    Type: Grant
    Filed: March 5, 2013
    Date of Patent: December 1, 2015
    Assignee: TE Connectivity Germany GmbH
    Inventors: Titus Ziegler, Thomas Haehnel, Matthias Kroeker, Udo Gabel, Peter Sandeck
  • Publication number: 20150145621
    Abstract: An electrical contactor has a first terminal having a fixed member with at least one fixed electrical contact, a second terminal, and a busbar connected to the second terminal. Two conductive movable arms are connected to the busbar and have a contact thereon. One arm is biased-closed to contact the fixed electrical contact in the absence of a separating force, and the other arm is biased-open to be spaced away from the fixed electrical contact in the absence of a closing force. The first and second movable arms and the busbar are arranged so that, when the contacts close, contra-flowing current urges the movable arms towards the fixed member to increase a force between the contacts.
    Type: Application
    Filed: November 26, 2014
    Publication date: May 28, 2015
    Inventor: Richard Anthony Connell
  • Patent number: 9013253
    Abstract: A relay includes two stators each having a fixed contact, and a movable element having movable contacts. Each of the stators includes a stator proximity plate portion adjacent to the movable element, and the movable element includes a movable element proximity plate portion adjacent to the stators. A direction of current flowing in the stator proximity plate portions is set to be same as a direction of current flowing in the movable element proximity plate portion to generate an inter-plate attraction force for attracting the movable element proximity plate portion onto the stator proximity plate portions. The movable element proximity plate portion is biased by the inter-plate attraction force toward a direction for bringing the movable contacts into contact with the fixed contacts.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: April 21, 2015
    Assignee: Anden Co., Ltd.
    Inventor: Akikazu Uchida
  • Patent number: 8963662
    Abstract: A system comprising a circuit interrupter configured to interrupt flow of current through a circuit during an over current condition, wherein the circuit interrupter comprises two contacts configured to remain in contact when a current flowing through the two contacts is less than a threshold value, a tripping mechanism configured to separate the two contacts when the current equals or exceeds the threshold value, and at least one of either a permanent magnet or an electrode configured to extinguish an electric arc formed between the two contacts of the circuit interrupter when the two contacts are separated, wherein the circuit interrupter does not include an arc chute.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: February 24, 2015
    Assignee: General Electric Company
    Inventors: Thangavelu Asokan, Nalini Nanrudaiyan
  • Patent number: 8841979
    Abstract: A relay includes two stators each having a fixed contact, and a movable element having movable contacts. Each of the stators includes a stator proximity plate portion adjacent to the movable element, and the movable element includes a movable element proximity plate portion adjacent to the stators. A direction of current flowing in the stator proximity plate portions is set to be same as a direction of current flowing in the movable element proximity plate portion to generate an inter-plate attraction force for attracting the movable element proximity plate portion onto the stator proximity plate portions. The movable element proximity plate portion is biased by the inter-plate attraction force toward a direction for bringing the movable contacts into contact with the fixed contacts.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: September 23, 2014
    Assignee: Anden Co., Ltd.
    Inventor: Akikazu Uchida
  • Patent number: 8816801
    Abstract: A contact mechanism where a shape of at least one of a fixed contactor including a pair of fixed contact portions and a movable contactor including a pair of movable contact portions capable of contacting with and separating from the pair of fixed contact portions is set to a shape that generates a Lorentz force resisting electromagnetic repulsion in a contactor opening direction generated between the fixed contact portions and the movable contact portions when a current is applied, has the fixed contactor and the movable contactor being inserted in a current path. Magnetic bodies are disposed on at least one of the fixed contactor and the movable contactor for suppressing a force driving arcs, which are generated between the pair of fixed contact portions and the pair of movable contact portions, to the fixed contactor on the opposite side.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: August 26, 2014
    Assignees: Fuji Electric Co., Ltd., Fuji Electric FA Components & Systems Co., Ltd.
    Inventors: Hiroyuki Tachikawa, Masaru Isozaki, Osamu Kashimura, Kouetsu Takaya, Yasuhiro Naka, Yuji Shiba
  • Publication number: 20140145803
    Abstract: An electromagnetic relay, in particular a motor vehicle relay, contains a magnet yoke, a relay coil, a hinged armature which is pivotable about an axis of rotation and on which a moving contact, as working or switchover contact, is retained relative to at least one fixed contact. A piezo actuator is provided, which keeps the working or switchover contact closed when the relay coil is de-energized as a result of the actuation of the piezo actuator.
    Type: Application
    Filed: January 29, 2014
    Publication date: May 29, 2014
    Applicants: CERAM TEC GMBH, ELLENBERGER & POENSGEN GMBH
    Inventors: MICHAEL NAUMANN, REINER BINDIG, ALFONS KELNBERGER, HANS-JUERGEN SCHREINER, PETER STINGL, PETER MECKLER, MARKUS BIRNER
  • Patent number: 8698582
    Abstract: A relay includes two stators and a movable element. Each stator has a fixed contact and includes an excitation portion that has a winding shape and generates a magnetic field. The movable element has movable contacts. In a magnetic flux of the magnetic field generated by the excitation portion, a movable element passing magnetic flux that passes through the movable element is orthogonal to a direction of current flowing in the movable element and a moving direction of the movable element. A Lorentz force that is generated by the movable element passing magnetic flux and the current flowing in the movable element acts in a direction for bringing the movable contacts into contact with the fixed contacts.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: April 15, 2014
    Assignee: Anden Co., Ltd.
    Inventor: Akikazu Uchida
  • Publication number: 20140015627
    Abstract: A relay includes two stators each having a fixed contact, and a movable element having movable contacts. Each of the stators includes a stator proximity plate portion adjacent to the movable element, and the movable element includes a movable element proximity plate portion adjacent to the stators. A direction of current flowing in the stator proximity plate portions is set to be same as a direction of current flowing in the movable element proximity plate portion to generate an inter-plate attraction force for attracting the movable element proximity plate portion onto the stator proximity plate portions. The movable element proximity plate portion is biased by the inter-plate attraction force toward a direction for bringing the movable contacts into contact with the fixed contacts.
    Type: Application
    Filed: September 25, 2013
    Publication date: January 16, 2014
    Applicant: ANDEN CO., LTD.
    Inventor: Akikazu UCHIDA
  • Publication number: 20130335175
    Abstract: A contact mechanism where a shape of at least one of a fixed contactor including a pair of fixed contact portions and a movable contactor including a pair of movable contact portions capable of contacting with and separating from the pair of fixed contact portions is set to a shape that generates a Lorentz force resisting electromagnetic repulsion in a contactor opening direction generated between the fixed contact portions and the movable contact portions when a current is applied, has the fixed contactor and the movable contactor being inserted in a current path. Magnetic bodies are disposed on at least one of the fixed contactor and the movable contactor for suppressing a force driving arcs, which are generated between the pair of fixed contact portions and the pair of movable contact portions, to the fixed contactor on the opposite side.
    Type: Application
    Filed: May 9, 2012
    Publication date: December 19, 2013
    Applicants: FUJI ELECTRIC FA COMPONENTS & SYSTEMS CO., LTD., FUJI ELECTRIC CO., LTD.
    Inventors: Hiroyuki Tachikawa, Masaru Isozaki, Osamu Kashimura, Kouetsu Takaya, Yasuhiro Naka, Yuji Shiba
  • Patent number: 8587394
    Abstract: A reed switch assembly of a magnetic latching relay includes a movable reed, an immovable reed, a movable contact and an immovable contact. The movable contact and the immovable contact are disposed at respective ends of the movable reed and the immovable reed. The end with the movable contact of the movable reed is bent twice to form a reverse U-shaped end. The end with the immovable contact of the immovable reed is bent twice to form a U-shaped end. The reverse U-shaped end of the movable reed and the U-shaped end of the immovable reed are interlaced. The present invention further comprises a tension spring. One end of the tension spring is fixed to the reverse U-shaped end of the movable reed, and another end of the tension spring is mounted to a base of the magnetic latching relay.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: November 19, 2013
    Assignee: Dongguan Sanyou Electrical Appliances Co., Ltd.
    Inventor: Chao-Yang Song
  • Patent number: 8558650
    Abstract: A molded case circuit breaker having an instantaneous trip mechanism including main circuit units in a lower compartment of the molded case circuit breaker; a stationary contactor and a movable contactor; a switching mechanism in an upper compartment of the molded case circuit breaker and having an open position and a closed position; an instantaneous trip mechanism in the upper compartment and operating by an electromagnetic attraction in response to generation of a fault current, which triggers the switching mechanism to the open position; and an intermediate insulation barrier providing electrical insulation by partitioning the lower compartment and the upper compartment.
    Type: Grant
    Filed: October 7, 2010
    Date of Patent: October 15, 2013
    Assignee: LS Industrial Systems Co., Ltd.
    Inventor: Ki Ho Paek
  • Publication number: 20130257568
    Abstract: An object of the invention is to provide a contact switching device that prevents scattered objects caused by arc from coming in, so that the scattered objects do not disturb operation of a movable shaft. For this, there is provided a contact switching device in which a movable iron core (142) provided at one end portion of a movable shaft (145) is attracted to a fixed iron core (138), based on excitation and degauss of an electromagnet portion, by which the movable shaft (145) reciprocates in a shaft center direction, and a movable contact (148a) of a movable contact piece (148) arranged at another end portion of the movable shaft (145) contacts and departs from a fixed contact (133a).
    Type: Application
    Filed: March 14, 2011
    Publication date: October 3, 2013
    Inventors: Keisuke Yano, Ryuichi Hashimoto, Yasuo Hayashida, Shingo Mori
  • Patent number: 8373523
    Abstract: An electromagnetic trip device for a circuit breaker is provided. The electromagnetic trip device includes a current path having a conductor guiding an electric current through at least one contact point formed between a fixed and at least one movable contact piece. A contact lever carries the at least one movable contact piece. The contact lever is mounted to be movable between a closed contact position and an open contact position. The electromagnetic trip device also includes a magnetic circuit with an air-gap. The movable contact lever is at least partially located in the air-gap. The electric current flows through the contact lever in a direction substantially perpendicular to the orientation of magnetic flux in the air-gap.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: February 12, 2013
    Assignee: ABB AG
    Inventor: Stefan Valdemarsson
  • Patent number: 8159319
    Abstract: A concept of a double-breaking contact system with a rotating contact arm is disclosed. In at least one embodiment, a novel arrangement of fixed conductors that cross over the contact arm is presented. A double-breaking contact system for a low voltage circuit breaker of at least one embodiment includes a double-breaking contact arm extending along a longitudinal axis and being rotatable across a central bearing; a first fixed conductor and a second fixed conductor, each conductor contacting one end of the contact arm, respectively and having first segments below the contact arm, second segments above the contact arm and third segments crossing over the contact arm and connecting the first segments with the corresponding second segments of each conductor; wherein the first segments and/or the second segments are arranged parallel to each other for guiding a current in a parallel direction through the respective first and/or second segments, but reverse to the current in the contact arm.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: April 17, 2012
    Assignee: Siemens Aktiengesellschaft
    Inventor: James Ferree
  • Patent number: 8134437
    Abstract: The present invention is directed to an inductively driven electromagnetic linear actuator arrangement employing eddy currents induced by a fixed drive coil to drive its armature. Eddy current focusing fields are employed to direct the eddy currents using Lorentz forces to maximize armature speed. The armature includes a shorted driven coil in a DC magnetic field. This can be supplied by a permanent magnet. When current is applied, a force is felt by the coil in a direction perpendicular to the magnetic field. Such an actuator is well suited for electrical switching applications including transfer switching applications, circuit breaker applications, and ground fault interrupter applications.
    Type: Grant
    Filed: May 20, 2006
    Date of Patent: March 13, 2012
    Assignee: PowerPath Technologies LLC
    Inventor: Elliot Brooks
  • Patent number: 8134438
    Abstract: The present invention is directed to an inductively driven electromagnetic linear actuator arrangement employing eddy currents induced in an armature by a drive coil to drive the armature. Eddy current focusing fields (Lorentz force) are employed to direct the induced eddy currents to maximize armature speed. The armature includes a shorted driven coil in a DC magnetic field that focuses eddy currents induced by the drive coil in the driven coil. The DC magnetic field can be supplied by one or more permanent magnets. When current is applied to the drive coil, a force is felt by the driven coil in a direction perpendicular to the magnetic field, causing armature movement. Such an actuator is well suited for electrical switching applications including transfer switching applications, circuit breaker applications, and ground fault interrupter applications.
    Type: Grant
    Filed: August 17, 2010
    Date of Patent: March 13, 2012
    Assignee: PowerPath Technologies LLC
    Inventor: Elliot Brooks
  • Patent number: 7948336
    Abstract: A mold cased circuit breaker is disclosed that enables a user to easily discern an actually connected state between stationary contactors and movable contactors and forcibly separates a connection therebetween if there arises electrical fault, wherein the circuit breaker comprises: a first isolation link hinged at a lower end thereof to a shaft unit and selectively engaged at an upper end thereof with a lateral surface of a lever; a second isolation link centrally formed with an oblong hole for accommodating a guide pin protruded on a side plate and linked at one end thereof to an upper end of the first isolation link; and an isolation lever adjacently positioned at one end thereof to the other end of the second isolation link, and so positioned at the other end thereof as to selectively engage with a nail, and rotatably mounted at the side plate to rotate the nail by way of operation of the second isolation link.
    Type: Grant
    Filed: March 15, 2007
    Date of Patent: May 24, 2011
    Assignee: LS Industrial Systems Co., Ltd.
    Inventor: Jin Young Park
  • Patent number: 7911302
    Abstract: A mechanism for a circuit breaker contact arm that allows current limiting by reducing the opening time is disclosed. A secondary trip assembly is arranged to actuate due to magnetic forces generated during an undesirable electrical condition such as a short circuit. The secondary trip system releases a contact arm assembly allowing the contact arm to rotate to an open position that interrupts the flow of electrical power.
    Type: Grant
    Filed: November 15, 2007
    Date of Patent: March 22, 2011
    Assignee: General Electric Company
    Inventors: Sapuram Sudhakar, Deepak Raorane, Arvind Pai, Kapil Bavikar
  • Patent number: 7777600
    Abstract: The present invention is directed to an inductively driven electromagnetic linear actuator arrangement employing eddy currents induced by a fixed drive coil to drive its armature. Eddy current focusing fields are employed to direct the eddy currents using Lorentz forces to maximize armature speed. The armature includes a shorted driven coil in a DC magnetic field. This can be supplied by a permanent magnet. When current is applied, a force is felt by the coil in a direction perpendicular to the magnetic field. Such an actuator is well suited for electrical switching applications including transfer switching applications, circuit breaker applications, and ground fault interrupter applications.
    Type: Grant
    Filed: May 20, 2005
    Date of Patent: August 17, 2010
    Assignee: PowerPath Technologies LLC
    Inventor: Elliot Brooks
  • Patent number: 7772943
    Abstract: An electrical contact assembly resists blow-open under conditions of increased current flow. The contact assembly includes parallel conducting surfaces on fixed and moveable conductors that generate forces biasing the contacts together under current flow conditions. The assembly also includes a magnetic armature and yoke that exert a magnetic force to resist movement of the contacts toward the open position. Current flowing through both the fixed and moveable conductors contribute to the magnetic force. A spring may additionally bias the contacts to the closed position. The contact assembly may be used in remote-controlled circuit breaker applications.
    Type: Grant
    Filed: June 27, 2007
    Date of Patent: August 10, 2010
    Assignee: Siemens Industry, Inc.
    Inventors: John DeBoer, Brian Timothy McCoy
  • Publication number: 20100123534
    Abstract: A method and apparatus for managing data, particularly in regard to non-volatile memory cells. In some embodiments, at least two actuating conductors are at least partially surrounded by a main ferromagnetic core and an adjacent hard magnet. When current is conducted through the actuating conductors, a flexible beam is induced to traverse a first air gap that defines a high resistance position and a low resistance position.
    Type: Application
    Filed: November 18, 2008
    Publication date: May 20, 2010
    Applicant: SEAGATE TECHNOLOGY LLC
    Inventors: Mark Anthony Gubbins, Robert William Lamberton, Dadi Setiadi
  • Patent number: 7646269
    Abstract: A shunt assembly is provided for an electrical switching apparatus including a conductor assembly having a load conductor and a movable contact assembly with a number of movable contact arms. The movable contact assembly is movable in response to a fault current. The shunt assembly includes a number of flexible conductive elements each having a first end electrically connected to the load conductor, a second end electrically connected to a corresponding one of the movable contact arms, and a number of bends disposed between the first and second ends. At least one constraint element is disposed proximate a corresponding one of the bends and constrains movement of the flexible conductive element in response to the fault current, thereby translating the magnetic repulsion force associated with the fault current into a corresponding torque of the movable contact arms of the movable contact assembly.
    Type: Grant
    Filed: March 7, 2007
    Date of Patent: January 12, 2010
    Assignee: Eaton Corporation
    Inventors: Nathan J. Weister, Paul R. Rakus, John J. Shea, William C. Pollitt
  • Publication number: 20090261928
    Abstract: A relay includes a contact point block having a support shaft with both ends spanning a contact point base, a plunger having a movable contact at a lower end thereof, and a movable iron piece configured to drive the plunger and to have a plate spring. The relay also includes an electromagnetic unit and a base block having a fixed contact point at a position opposite to the movable contact point. The movable iron piece is supported on the supporting shaft. The plunger is inserted through an operation hole of the contact point base. Upper and lower surfaces of the contact point block are held by the electromagnetic unit and the base block. The electromagnetic unit directly fixes the iron core to an upper surface of the contact point base.
    Type: Application
    Filed: August 8, 2006
    Publication date: October 22, 2009
    Applicant: OMRON CORPORATION
    Inventors: Masanori Nakamura, Yojiro Saruwatari, Tatsuo Shinoura, Akira Ota
  • Publication number: 20090039990
    Abstract: A magnet switch which may be employed in automotive engine starters is provided. The magnet switch includes a stationary magnetic core made up of a disc assembly and a core body. The disc assembly is made of a stack of annular plate members superposed on each other. Each of the plate members has an opening through which a terminal lead of a magnetic coil extends. The core body has a boss with an edge which is plastically deformed outwardly in the radius direction thereof or staked to create an elastic nip which retains the stack of the plate members firmly on the core body. This structure ensures the joint between the disc assembly and the core body to withstand mechanical impact exerted on the magnetic core and stability in operation of the magnet switch without increasing a total production cost of the magnetic switch.
    Type: Application
    Filed: July 30, 2008
    Publication date: February 12, 2009
    Applicant: DENSO CORPORATION
    Inventors: Shinji Usami, Tomohiro Teramachi
  • Patent number: 7148774
    Abstract: A circuit breaker contact assembly includes a line conductor having a folded back fixed contact end, a fixed contact mounted on the contact end, and a movable contact arm having an inner edge and first and second ends. A movable contact is mounted on the first end. The movable contact arm is pivotable about the second end between a closed position in which the inner edge extends adjacent the contact end with the movable contact in contact with the fixed contact to form a reverse current loop, and an open position in which the movable contact is pivoted away from the fixed contact. The contact arm includes a first inner longitudinal member extending along the inner edge and a second outer longitudinal member. The first inner longitudinal member has a higher electrical conductivity than the second outer longitudinal member, which has a higher shear strength and a lower specific density.
    Type: Grant
    Filed: July 11, 2005
    Date of Patent: December 12, 2006
    Assignee: Eaton Corporation
    Inventors: John J. Shea, Jeffrey A. Miller
  • Patent number: 7102471
    Abstract: A power breaker includes a switching contact arrangement having a current loop in order to allow a force dependent on the current to act on the contact members. For this purpose, sections, which are arranged parallel to one another and such that they are arched and concentric, are arranged on a stationary current conductor and on a contact lever. Depending on the position of a center of a resultant force, originating from the arched sections, in relation to a pivot bearing of the contact lever, a torque acts on the contact lever causing the switching contact arrangement to open or close. Using largely identical parts, power breakers which have a current-limiting or contact-force-increasing action can thus be produced.
    Type: Grant
    Filed: June 27, 2003
    Date of Patent: September 5, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventor: Ludvik Godesa
  • Patent number: 7023307
    Abstract: The present invention provides an apparatus and method of interrupting the current in a circuit wherein the magnetic pressure induced by current flow through a conductor causes the conductor to flow and thereby open the associated circuit. Magnetic pressure may be derived from Lorenz equations. Gravity is not relied upon to cause the conductor material to flow. The invention may be used in circuits having high currents relative to conductor size and material selection.
    Type: Grant
    Filed: November 6, 2003
    Date of Patent: April 4, 2006
    Assignee: Pratt & Whitney Canada Corp.
    Inventor: Kevin Allan Dooley
  • Patent number: 7009129
    Abstract: A switching device including housing and a breaker mechanism, the latter consisting of a trip lever, a catch, a displaceable contact arm and a deflection shaft that is fixed to the housing. The aim is to generate a constant contact force. To achieve this, the end of the catch is coupled to the displaceable contact arm by way of a bolt. The bolt is configured to be displaced in a receiving element that is formed by the housing.
    Type: Grant
    Filed: July 5, 2002
    Date of Patent: March 7, 2006
    Assignee: Siemens Aktiengesellschaft
    Inventor: Winfried Vierling
  • Patent number: 6987657
    Abstract: A device for protection against voltage surges comprises a stationary electrode and a movable electrode arranged facing an arc extinguishing chamber. The movable electrode is driven by a mechanisms, by an electromechanical actuator and/or by an electromagnetic circuit. At rest, the movable electrode is situated at a distance from the stationary electrode. When a voltage surge occurs between the electrodes, an arc arises and extends in the chamber in which it is extinguished. If the arc continues, in particular in the case of a follow current of high energy, the movable electrode is driven to a disconnected position moving away from the stationary electrode, which has the effect of lengthening the arc even more in the chamber to facilitate its extinction and perform disconnection of the circuit. A pair of contacts may be associated in series to the electrodes, one of the contacts being stationary and the other being fixedly secured to the movable electrode. A spark gap can also be associated to the electrodes.
    Type: Grant
    Filed: April 9, 2003
    Date of Patent: January 17, 2006
    Assignee: Schneider Electric Industries SAS
    Inventors: Eric Domejean, Marc Rival
  • Patent number: 6975190
    Abstract: A contactor device of a repulsion-type circuit breaker includes a first movable contactor with a first movable contact to be driven by an open-close mechanism; a fixed contactor; a second movable contactor having second and third movable contacts; a first contact spring for urging the first movable contactor toward the second movable contactor; and a second contact spring for urging the second movable contactor toward the first movable contactor and the fixed contactor. The first movable contactor, fixed contactor, and second movable contactor are arranged such that when an over-current flows, an electromagnetic repulsive force is generated so that the first and second movable contactors are rotated against the first and second contact springs to open between the first movable contact and the second movable contact and between the fixed contact and the third movable contact before the open-close mechanism opens the first movable contact.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: December 13, 2005
    Assignee: Fuji Electric FA Components & Systems Co., Ltd.
    Inventors: Akifumi Sato, Koji Asakawa, Mitsuhiro Mitsushige, Yasuhiro Takahashi, Hideto Yamagata
  • Patent number: 6970059
    Abstract: A circuit breaker includes a housing having first and second openings, with stationary and movable separable contacts disposed therein. An operating mechanism is disposed in the housing, is coupled to the separable contacts and is structured to move those contacts between open and closed positions. A trip mechanism is disposed in the housing and cooperates with the operating mechanism to trip open the separable contacts. A slot motor assembly is disposed about the separable contacts and has upper and lower slot motor portions. The upper slot motor portion is disposed above the movable contact and the lower slot motor portion is disposed below the stationary contact. The upper slot motor portion includes a rigid, laminated steel member having a general U-shape, with a bight portion, and first and second legs. The first and second legs engage the housing at the respective first and second openings.
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: November 29, 2005
    Assignee: Eaton Corporation
    Inventors: Robert W. Mueller, Thomas A. Whitaker
  • Patent number: 6952149
    Abstract: A circuit breaker includes a housing, an operating mechanism, and a cassette. The cassette includes a separable current path having a movable contact arm, two arc receptors each disposed for receiving an electrical arc in response to a short circuit overcurrent condition, and two slot motors each disposed proximate the movable contact arm for magnetically driving the movable contact arm to a blown open position in response to a short circuit overcurrent condition. The slot motors each have two side legs opposing each other and defining a space therebetween for receiving the movable contact arm, each side leg having a magnetic core and an insulative layer and being biased toward the interior of the side walls of the cassette, wherein each side leg is restrained from being magnetically attracted toward the movable contact arm during a short circuit condition.
    Type: Grant
    Filed: May 13, 2003
    Date of Patent: October 4, 2005
    Assignee: General Electric Company
    Inventors: Ronald Ciarcia, Ananthram Subramanian, Macha Narender, Luis Brignoni, Samuel Kim
  • Patent number: 6879227
    Abstract: A switching contact includes a rocker-type leaf spring as a contact force spring in order to produce the contact force required for a contact lever A drag bearing thereof is disposed between the point of rotation of the contact lever on a contact carrier and a contact-making end piece of the contact lever. Preferably, the drag bearing is formed by a bend of the contact force spring and a sliding surface disposed on the contact carrier. The drag bearing of the contact force spring can be displaced without a fixed link along the sliding surface according to the tension of the contact force spring. If the switching contract arrangement has several contact levers (multiple contact arrangement) all of the associated contact force springs can be combined to form a one-piece leaf spring.
    Type: Grant
    Filed: February 7, 2002
    Date of Patent: April 12, 2005
    Assignee: Siemens Aktiengesellschaft
    Inventors: Michael Bach, Detlev Schmidt, Ingo Thiede, Sezai Türkmen
  • Patent number: 6717089
    Abstract: An electric pole for a low-voltage power circuit breaker, comprising: a fixed contact and a movable contact which can be mutually coupled/uncoupled; at least two conducting elements, suitable to electrically connect the movable contact to a power supply grid, the conducting elements being arranged so that the electric currents flowing through them are equally orientated; means for mechanically supporting and actuating the movable contact; and at least one insulating element which is interposed between the conducting elements and is suitable to contrast, by friction with the conducting elements, electrodynamic repulsion forces that are generated between the fixed contact and the movable contact during opening in short-circuit operating conditions.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: April 6, 2004
    Assignee: ABB Service S.r.l.
    Inventors: Lucio Azzola, Eligio Zanchi
  • Patent number: 6672750
    Abstract: The present invention is an apparatus for lighting a decorative tree which includes optical fibers with their first ends distributed in branches and ornaments of the tree, a color sleeve loop, a roller and track system attached to a motor which rotates the color sleeve loop through the system, and a light source. As the color sleeve is moved by the motor between the light source and the optical fibers, the color of the light provided to the optical fibers changes thereby changing the color displayed in the tree. The preferred embodiment uses a color sleeve with two different tracks of color and a divider which divides the optical fibers into two sets. Then one set of optical fibers is exposed to one color track and the other set exposed to the other track; light provided to one part of the tree will change colors differently than light provided to another part of the tree.
    Type: Grant
    Filed: February 13, 2002
    Date of Patent: January 6, 2004
    Assignee: Boto (Licenses) Limited
    Inventor: Cheung Chong Kao
  • Publication number: 20030234709
    Abstract: A reed relay or reed sensor device that is substantially lead-less and has minimal inductance can be manufactured as an individual unit or as a plurality of units. The reed relay or reed sensor device comprises a substrate that has a plurality contacts on the exterior of the device connected to contacts on the interior of the device capable of maintaining a signal pathway to the internal components of the device. The internal components further comprise a reed switch, an electrical shield, a coil bobbin, and a coil of electrical wire which when energized is capable of effectuating switching in the reed relay.
    Type: Application
    Filed: March 18, 2003
    Publication date: December 25, 2003
    Applicant: Meder Electronic
    Inventors: John Beigel, Gunther Samuel, John Boyington
  • Patent number: 6636134
    Abstract: The switching point in a high- or medium-voltage switch contains two fixed contact members (1, 2), a rotating, electrically conductive bridging contact member (3), and a drive for moving the bridging contact member (3). When the switching point is closed, the bridging contact member (3) is fit in between the fixed contact members (1, 2) and short-circuits them. The drive is composed of two coils (5, 6) which surround the bridging contact member (3) and are arranged in such a manner that the bridging contact member (3) can be caused to rotate by a current in a respective one of the coils. The energy which needs to be applied to rotate the bridging contact member is less than for contact members which move in translation in comparable switching points. The energy required for opening and closing the switching point is thus reduced.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: October 21, 2003
    Assignee: ABB Schweiz AG
    Inventors: Walter Holaus, Samuele Sartori, Michael Steurer, Klaus Fröhlich, Kurt Kaltenegger
  • Patent number: 6580345
    Abstract: A switching device includes a movable coil which is reinforced by a stiffener to increase the resistance of the movable coil to bending moments. The stiffener may include a nonmagnetic case which surrounds the movable coil. Alternatively or in addition, it may include a resin or other material encapsulating the movable coil.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: June 17, 2003
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Hiroyuki Akita, Toyomi Ooshige, Hiroyuki Sasao, Kenichi Koyama, Yukimori Kishida, Mitsuru Tsukima, Toshie Takeuchi
  • Patent number: 6563406
    Abstract: A circuit breaker includes a plurality of poles that are connected with one another in parallel, and additionally includes a mutual connection connecting the poles with one another to isolate the trip units associated with the poles from any imbalance in the current flowing through the poles. Each pole includes a first conductor structured to be connected with a power source, a second conductor structured to be connected with an electrical load, and a pair of separable contacts that disconnectably connect the first conductor with the second conductor. The trip unit of each pole is configured to measure the current flowing through a given point of the second conductor, and the mutual connection connects the second conductors together at a connection point, the connection point of each second conductor being between the separable contacts and the given point.
    Type: Grant
    Filed: June 15, 2001
    Date of Patent: May 13, 2003
    Assignee: Eaton Corporation
    Inventors: William Ellsworth Beatty, Roger Eugene Walker
  • Patent number: 6518865
    Abstract: An electric switching device for fast closing of a high current in a power network comprising a first electrode (1), a second electrode (2), a movable contact element (3) closing said first and second electrodes, and an operating device. The operating device comprises a helically wound first coil (6) secured to the first electrode. The movable contact element comprises a flange (4) making contact with the coil. A current pulse flowing through the coil forms a repulsive force between the coil and the flange, said repulsive force throwing the movable contact element to the second electrode and completing the closing operation.
    Type: Grant
    Filed: February 26, 2002
    Date of Patent: February 11, 2003
    Assignee: ABB T&D Technology LTD et al.
    Inventors: Falah Al-Hosini, Stefan Valdemarsson, Lars Jonsson, Jan-Anders Nygren, Per Larsson
  • Patent number: 6441709
    Abstract: The current-limiting mechanism is provided in particular in order to protect electromechanical contactors from being welded by a short-circuit load. In a first step, the current-limiting mechanism closes a bridging contact of a first bridging current path in order to reduce the current load on the contactor. In a second step, its bridging function is taken over by a switching arc and by a second bridging current path, In the further course of the disconnection process, the switching arc commutates from the bridging contact onto associated running rails or arc runners and runs into an arcing chamber of the current-limiting mechanism. As a result, the short-circuit is interrupted.
    Type: Grant
    Filed: January 30, 2001
    Date of Patent: August 27, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventor: Fritz Pohl
  • Patent number: 6426688
    Abstract: A circuit breaker rotary contact arm is used within a plurality of single pole modules ganged together to form a single multi-pole circuit breaker. To provide for use in quiescent conditions having high ampere ratings, low ampere rated rotary contact arm assemblies are combined in parallel to form a higher rated single pole module, which are then ganged together to form a single multi-pole circuit breaker having a high quiescent ampere rating.
    Type: Grant
    Filed: May 25, 1999
    Date of Patent: July 30, 2002
    Assignee: General Electric Company
    Inventors: Francesco DeVizzi, Stefan Kranz
  • Patent number: 6396369
    Abstract: A circuit breaker rotary contact assembly employs a rotor assembly to operate the moveable contact arms. Separate pivots are provided to the rotor assembly and the moveable contact arms to ensure that the contacts close prior to complete rotation of the rotor assembly. The additional rotation force provided by the rotor assembly then translates into lateral displacement of the moveable contacts relative to the fixed contacts, resulting in contact wiping function. An alternate embodiment utilizes a common pivot for both the rotor assembly and the moveable contact arms, while providing post closure motion by means of a fixed contact compression spring.
    Type: Grant
    Filed: August 27, 1999
    Date of Patent: May 28, 2002
    Assignee: General Electric Company
    Inventors: Dan Schlitz, Gary Douville, Thomas O'Keeffe, Stephen Wuest
  • Patent number: 6353376
    Abstract: A switching assembly includes a switch portion having a fixed electrode and a movable electrode which are separable, a movable portion secured between a movable shaft connected to the movable electrode and a movable coil by a magnetic body, and a fixed portion having a magnetic body disposed radially inside a fixed coil disposed opposite the movable portion, thereby enabling intensification and swift establishment of magnetic fields generated between the coils.
    Type: Grant
    Filed: December 28, 1999
    Date of Patent: March 5, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Toshie Takeuchi, Toshiyuki Yoshizawa, Hiroyuki Akita, Hiroyuki Sasao, Yukimori Kishida
  • Patent number: 6281459
    Abstract: A circuit interrupter including a housing, separable main contacts within the housing, and an operating mechanism within the housing and interconnected with the contacts. An arc extinguisher assembly is disposed within the housing. Also provided within the housing is a slot motor assembly having a cavity region within which the contacts are substantially located. The slot motor assembly electro-magnetically interacts with current flowing between the contacts, and includes magnetic plates positioned in a slot motor housing. The slot motor housing has a tendency to move an arc existing between the contacts toward the arc extinguisher assembly. The slot motor assembly also includes an insulation member positioned within the cavity region and between the magnetic plates and the slot motor housing.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: August 28, 2001
    Assignee: Eaton Corporation
    Inventors: William David Munsch, Richard Paul Malingowski, Craig Allen Rodgers, Ronald William Brand, Jr., Lois Ann Gill
  • Patent number: 6281461
    Abstract: A rotor spring insulator assembly comprises a base member having a D-shaped opening therein and a connecting rod of a D-shaped cross section dimensioned to be received in the D-shaped opening of the base member. The flat edge of the D-shaped connecting rod faces a spring of a rotor thereby maximizing the distance and the amount of insulative material between the connecting rod and the spring to minimize the chance that arcing will occur between the connecting rod and the spring.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: August 28, 2001
    Assignee: General Electric Company
    Inventor: Dennis J. Doughty
  • Patent number: 6229413
    Abstract: A circuit breaker having at least one cassette for receiving a conductive path. The conductive path is partially looped upon itself so that a first portion and a second portion of the conductive path are in a facially spaced relationship and the portions partially define an area for receiving a ferromagnetic material. The ferromagnetic material is insulated from the first portion and a support structure provides support for the first portion at two positions and the area is positioned in between these positions.
    Type: Grant
    Filed: October 19, 1999
    Date of Patent: May 8, 2001
    Assignee: General Electric Company
    Inventors: Roger Castonguay, Dave S. Christensen, Randy Greenberg
  • Patent number: 5793270
    Abstract: The movable contact arms of a circuit breaker are latched in the blow open position to prevent rebound and possible restrike of the arc in response to the very high magnetic repulsion forces generated by a short circuit in the protected electrical system. Each movable contact arm is mounted on a secondary carrier coupled to a main carrier by a spring loaded cam mechanism which allows the movable contact arm to blow open before the main carrier is rotated to the open position by the spring driven circuit breaker operating mechanism. In one embodiment of the invention, the movable contact arm is latched in the blow open position by a latching detent in the cam surface of the cam mechanism. In a preferred embodiment, the secondary carrier is latched by a detent formed by a leaf spring cantilevered from a fixed support. Subsequent rotation of the main carrier by the operating mechanism releases the latch by rotating the secondary carrier clear of the detent formed by the leaf spring.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: August 11, 1998
    Assignee: Eaton Corporation
    Inventors: Henry Richard Beck, Kenneth Martin Fischer, Richard Edwin White