With Plural Magnetic-actuating Structures Patents (Class 335/103)
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Patent number: 9852867Abstract: A downsized current sensor with a switch function is disclosed. The current sensor includes: a magnetic circuit to converge a magnetic flux generated from an electric circuit at a magnetic sensor; a switch to open and close the electric circuit in a way that operates together with a movable magnetic body configuring a part of the magnetic circuit; and a magnetizing coil to generate magnetic force enabling the movable magnetic body to be attracted to a fixed magnetic body configuring a part of the magnetic circuit.Type: GrantFiled: December 4, 2014Date of Patent: December 26, 2017Assignee: FUJITSU LIMITEDInventors: Osamu Tsuboi, Hiromitsu Soneda
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Publication number: 20150145621Abstract: 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: ApplicationFiled: November 26, 2014Publication date: May 28, 2015Inventor: Richard Anthony Connell
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Patent number: 8754730Abstract: An electromagnetically operated switching device according to the present invention includes a pair of electromagnetically operated mechanisms for driving a main circuit contact of a switch via a link mechanism symmetrically arranged with respect to an operational center axis, and a length of a spring retaining plate can be regulated in accordance with a change of a link ratio, which is caused by a design change of the main circuit contact.Type: GrantFiled: January 13, 2010Date of Patent: June 17, 2014Assignee: Mitsubishi Electric CorporationInventors: Toru Kimura, Tomotaka Yano
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Patent number: 7710225Abstract: The present invention provides the actuator, which is capable of preventing biased abrasion by lowering a surface pressure at a contact portion of a movable element with a guide surface and increasing a movable range, in which a specified output force can be gained. Magnetic resistance of at least one of the surfaces (Y1, Y2) of first and second yoke parts (5, 6) corresponding to peripheral surfaces (P1, P2) of a plunger (7), on which magnetic flux acting surfaces are formed by energization, is unbalanced in the circumferential direction so as to act a resultant force of magnetic forces acting on the movable element in the radial direction eccentrically to a radial one end (E1) side.Type: GrantFiled: November 10, 2005Date of Patent: May 4, 2010Assignee: Shinano Kenshi Kabushiki KaishaInventor: Masahiko Uni
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Patent number: 7605680Abstract: A highly efficient electromagnetic actuator which can reduce leakage of the magnetic flux is provided. The electromagnetic actuator comprises a first coil 31, a movable body 2 adapted to move on the central axis of the first coil 31, a first stator 11 covering the top face, bottom face and outer peripheral face of the first coil 31, and a permanent magnet 15 adapted to firmly latch the movable body 2 at one end point of its movable range. A second stator 12 adapted to control the magnetic flux generated from the permanent magnet 15 is provided in succession with the first stator 11. By providing the second stator 12, when releasing the movable body 2 from its firmly latched state, the permanent magnet 15 is not inversely excited or demagnetized.Type: GrantFiled: September 7, 2005Date of Patent: October 20, 2009Assignee: Kabushiki Kaisha ToshibaInventors: Yasuhiro Matsumoto, Nobutaka Kubota, Takeshi Noda, Kazuhiro Matsuo, Kenji Kato, Mitsutaka Homma, Takao Wakabayashi
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Patent number: 7482901Abstract: A circuit breaker is comprised of a make-and-break mechanism part disposed between frame plates opposite to each other; a base in which a breaking portion including cross bar, moving contact, fixed contact and arc-extinguishing device, and an over-current trip device are contained; a middle base, in which a partition wall separating the breaking portion from the make-and-break mechanism part, and the breaking portion from the over-current trip device, is provided; and a cover for covering the base and middle base. A frame of the make-and-break mechanism part is secured to the base through the middle base, and the secured part of the frame and the inner bottom face of the base are disposed in the proximity.Type: GrantFiled: June 8, 2006Date of Patent: January 27, 2009Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Kazumasa Watanabe, Hiroyuki Kakisako, Shigeki Koumoto, Takashi Iitsuka, Kouzou Maeta
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Patent number: 4617541Abstract: A starter for a reversible motor has a single outer casing and one operating switch for controlling the forward or reverse rotation of the motor. The starter uses only ten pairs of electric contacts instead of the twenty pairs of contacts in a conventional starter. A safety means is provided which can turn off the undesired actuation circuit of the electromagnet. And another important feature of the starter is an adjustable screw with a coil spring sleeved thereon to assure the right movable contacts being closed in the starter without closing undesired contacts.Type: GrantFiled: September 16, 1985Date of Patent: October 14, 1986Assignees: Pen-Ho Huang, Gordon Kuo-Chon ChangInventor: Chiu-Hsiung Chuang
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Patent number: 3956722Abstract: A control device for an eddy current retarder having a plurality of energizing windings comprises an insulating support carrying a plurality of connecting terminals for connection to the retarder windings and a junction terminal for connection to one pole of a power supply. A plurality of contactors are provided for controlling the energizing of the retarder windings, each contactor corresponding to a connecting terminal and comprising first and second fixed contact members, a bridge contact co-operating with the first and second fixed contact members, and a pull-on contactor winding controlling the bridge contact. A first contact plate connects the first contact member of each contactor to the corresponding connecting terminal and a second common contact plate connects the second contact members of the contactors to the junction terminal. Each contactor winding is connected to a respective control terminal which is connected to a control selector for consecutively energizing the control terminals.Type: GrantFiled: November 21, 1974Date of Patent: May 11, 1976Assignee: Labavia-S.G.E.Inventor: Roger Lagarde