Movable Contacts On Circular Card Or Comb Structure Patents (Class 335/130)
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Patent number: 11942297Abstract: A relay includes a movable contact piece having a movable contact, a fixed contact, a drive device configured to move the movable contact piece, a magnet to apply a Lorentz force to an arc in a first extension direction, a fixed terminal having an intermediate portion to apply a Lorentz force to the arc in a second extension direction, and a wall portion. The wall portion includes first and second wall surfaces. The first wall surface is disposed to face an arc-extinguishing space, and is disposed opposite to the movable contact and the fixed contact in the first extension direction. The second wall surface is disposed to face the arc-extinguishing space and is disposed downstream in the second extension direction with respect to the first wall surface. A distance from the movable contact piece to the second wall surface differs from a distance to the first wall surface.Type: GrantFiled: February 18, 2019Date of Patent: March 26, 2024Assignee: OMRON CORPORATIONInventors: Naoki Kawaguchi, Ryota Minowa, Yasuo Hayashida, Shingo Mori, Kohei Otsuka, Hiroyuki Iwasaka
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Patent number: 11791119Abstract: First and second movable contacts are connected to a first movable contact piece. A second movable contact piece is provided separately from the first movable contact piece. Third and fourth movable contacts are connected to the second movable contact piece. A drive device moves the first movable contact piece and the second movable contact piece by moving a movable iron core by a magnetic force generated from a coil. In a state where the first to fourth movable contacts are contacts the first to fourth fixed contacts, respectively, the first movable contact piece and the second movable contact piece are electrically connected in parallel with the first fixed terminal and the second fixed terminal.Type: GrantFiled: February 12, 2020Date of Patent: October 17, 2023Assignee: OMRON CORPORATIONInventors: Ayaka Miyake, Koichiro Matsushima, Yuji Kozai, Taira Minamizaki
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Patent number: 11515113Abstract: A contact device includes a fixed contact, a movable contact, a housing, and an arc extinguishing member. The movable contact moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact is separate from fixed contact. The housing houses the fixed contact and the movable contact. The arc extinguishing member is movably disposed in the housing and discharges an arc extinguishing gas. The arc extinguishing member is disposed facing a gap between the fixed contact and the movable contact when the movable contact is in the open position.Type: GrantFiled: October 16, 2019Date of Patent: November 29, 2022Assignee: OMRON CORPORATIONInventors: Takeshi Nishida, Tatsuro Kato
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Patent number: 11469063Abstract: A contact device includes a fixed contact, a movable contact, a housing, and an arc extinguishing member. The movable contact moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact is separate from fixed contact. The housing houses the fixed contact and the movable contact. The arc extinguishing member is disposed in the housing and discharges an arc extinguishing gas. The arc extinguishing member is disposed facing a gap between the fixed contact and the movable contact when the movable contact is in the open position. The arc extinguishing member has a shape that tapers toward the gap.Type: GrantFiled: October 16, 2019Date of Patent: October 11, 2022Assignee: OMRON CORPORATIONInventors: Takeshi Nishida, Tatsuro Kato
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Patent number: 10032570Abstract: The contact device includes: a fixed contact member including a fixed contact; and a movable contact member including a movable contact. The movable contact member is movable between a position where the movable contact is in contact with the fixed contact and a position where the movable contact is away from the fixed contact. The movable contact member further includes a protrusion which protrudes from a face to which the movable contact is provided, in a direction same as a protruding direction of the movable contact.Type: GrantFiled: May 12, 2015Date of Patent: July 24, 2018Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventor: Kazuhisa Kinoshita
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Patent number: 9620320Abstract: The contact device includes an armature, a driver, a fixed contact, a movable contact, a contact spring, and a card. The driver drives the armature. The movable contact is to be in contact with and separate from the fixed contact. The contact spring is for holding the movable contact so as to allow the movable contact to be in contact with and separate from the fixed contact. The card interconnects the armature and the contact spring. The card is made of resilient material and fixed to each of the armature and the contact spring.Type: GrantFiled: May 12, 2015Date of Patent: April 11, 2017Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Chiharu Nakahara, Kazuhisa Kinoshita
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Patent number: 7710224Abstract: An electromagnetic relay enables current to pass through switch termini and comprises a coil assembly, a rotor or bridge assembly, and a switch assembly. The coil assembly comprises a coil and a C-shaped core. The coil is wound round a coil axis extending through the core. The core comprises core termini parallel to the coil axis. The bridge assembly comprises a bridge and an actuator. The bridge comprises medial, lateral, and transverse field pathways. The actuator extends laterally from the lateral field pathway. The core termini are coplanar with the axis of rotation and received intermediate the medial and lateral field pathways. The actuator is cooperable with the switch assembly. The coil creates a magnetic field directable through the bridge assembly via the core termini for imparting bridge rotation about the axis of rotation. The bridge rotation displaces the actuator for opening and closing the switch assembly.Type: GrantFiled: August 1, 2007Date of Patent: May 4, 2010Assignee: Clodi, L.L.C.Inventors: Philipp Gruner, Klaus A. Gruner
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Patent number: 7679477Abstract: A contactor with modular connection of the coil according to the invention comprises an insulating body, an operating coil housed in the insulating body, and means of modular connection of the coil to an external circuit so that the coil can be powered. The coil connection means comprise a connection arrangement, internal to the body, comprising at least two pairs of contact pieces positioned near at least two faces of the insulating body, these two faces being chosen from the front face and two opposed side faces running transversely between the front face and the rear face, each contact piece facing an opening in the body, and at least one removable connection module comprising a pair of connection terminals, which is connected to a second pair of contacts which are intended to collaborate with a first pair of contact pieces of the internal connection arrangement.Type: GrantFiled: October 9, 2007Date of Patent: March 16, 2010Assignee: ABB FranceInventor: Alain Portier
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Patent number: 7633363Abstract: A forcibly guided relay is disclosed, with a housing, whose height is smaller than its width and whose width is smaller than its length. With this, the relay comprises an electromagnetic drive filling the length or the width of the relay, with a clapper-type contactor which comprises a drive arm which extends in the direction of the core and at its free end cooperates with a drive cam; several contact pairs, which are in each case formed by a contact spring and a fixed or spring-like counter-contact said contact springs extending in the direction of the core, and with the drive ends being in a forcibly guided engagement with the drive cam.Type: GrantFiled: March 16, 2007Date of Patent: December 15, 2009Assignee: Elesta Relays GmbHInventor: Werner Fausch
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Patent number: 7557684Abstract: According to the invention, an electromagnetic switch includes a pair of fixed contacts, a movable magnetic core, a magnetic coil, and a fixed magnetic core. The movable magnetic core is configured to be moved by a magnetic attraction, thereby establishing an electrical connection between the fixed contacts. The fixed magnetic core is configured to create the magnetic attraction when the magnetic coil is energized. The fixed magnetic core has a base portion and a disc portion. The base portion is arranged to face the movable magnetic core. The disc portion is fixed to the base portion and formed of a stack of metal sheets including at least one base metal sheet and a balance metal sheet. The balance metal sheet has a thickness that is predetermined to balance a difference between a desired thickness of the disc portion and a total thickness of the at least one base metal sheet.Type: GrantFiled: February 12, 2007Date of Patent: July 7, 2009Assignee: Denso CorporationInventor: Tadahiro Kurasawa
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Patent number: 7522025Abstract: A switchgear comprises a switching device, such as a relay, with a switching mechanism. A printed-circuit board that is provided with at least one electronic component is electrically connected to the switching device to form a supplementary electrical circuit, which receives an operating voltage supplied to the switching device.Type: GrantFiled: October 25, 2006Date of Patent: April 21, 2009Assignee: Tyco Electronics Austria GmbHInventors: Philipp Zeitlberger, Werner Falkner, Fritz Kaplanek
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Patent number: 7492244Abstract: A code switch for an electrical appliance comprises triggering magnets at specific points in a rotatable rotor. Stationary opposite contacts are disposed in the housing of the code switch and wipers are provided with contact heads assigned to said opposite contacts at a disconnecting distance. When a triggering magnet is moved above an opposite contact by rotating the rotor, the contact head is pulled upward by magnetic force towards the opposite contact and the contact is closed.Type: GrantFiled: July 19, 2006Date of Patent: February 17, 2009Assignee: E.G.O. Elektro-Geraetebau GmbHInventor: Wolfgang Hamm
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Patent number: 7423504Abstract: An electromagnetic relay is provided which is capable of reducing a contact bounce at time of closing a contact. The electromagnetic relay is so configured that an opposed angle ? is 0°<?<45°, when viewed from a direction to which a normally open fixed contact and a movable contact slide before the normally open fixed contact comes into surface-contact with the movable contact spring.Type: GrantFiled: April 11, 2006Date of Patent: September 9, 2008Assignee: NEC Tokin CorporationInventors: Hiroyuki Kon, Masayuki Morimoto
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Patent number: 7091805Abstract: An electromagnetic relay has a mobile contact point attached to a contact member, a fixed contact point, a contact point spring that applies a biasing force on the contact member towards the fixed contact point, a guide that carries the contact member and said contact point spring, a coil that generates a pulling force when excited to move the guide and a returning spring that provides a biasing force for causing the guide to return. A mechanism is provided such that a load is generated on the contact member by the motion of the guide towards the fixed function against the returning spring immediately before the mobile contact point contacts the fixed contact point. This mechanism applies a contact point spring load of the contact point spring and the load as a contact pressure to the contact member for contacting the mobile contact point with the fixed contact point.Type: GrantFiled: February 9, 2005Date of Patent: August 15, 2006Assignee: OMRON CorporationInventors: Kuniaki Kawahara, Shinya Matsuo
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Patent number: 7061350Abstract: The invention relates to an electromagnetic relay with an electromagnetic coil for exciting a magnetic field and an iron circuit for guiding the magnetic field, wherein the electromagnetic coil surrounds at least part of the iron circuit and the iron circuit comprises a core, a movable armature and a yoke. The electromagnetic relay further comprises a contact system with a movable contact bridge which can be actuated dependent on the magnetic field. In order to provide an electromagnetic relay that is able to disconnect or connect a plurality of electric contacts simultaneously in a particularly secure and loss reduced manner, according to the present invention there are provided at least three electric contacts on the contact bridge. According to an advantageous embodiment, the contact system comprises three fixed contacts which are corresponding each to one of three phases and the contact bridge forms a star point of the three phases.Type: GrantFiled: December 6, 2002Date of Patent: June 13, 2006Assignee: Tyco Electronics AMP GmbHInventors: Axel Schneider, Titus Ziegler
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Patent number: 6816044Abstract: An electrical switching element comprising a housing having an elongated base. An electrical coil is wrapped around a yoke and arranged in the housing such that a center axis of the electrical coil is positioned parallel to the elongated base of the housing. An armature having a first switching contact is mounted in a sprung manner and in operative connection with the armature. A first low-profile contact is connected to the first switching contact, and a second low-profile contact is connected to the second switching contact.Type: GrantFiled: March 21, 2002Date of Patent: November 9, 2004Assignee: Tyco Electronics Austria GmbHInventors: Leopold Mader, Rudolf Mikl
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Patent number: 6778047Abstract: A relay with coupling element consists of at least one spring bracket with an active and a passive contact spring. In order mechanically to couple several such relays with one another, a coupling element is provided which is pluggably connectable with the respective spring brackets of the relays in order to create a twin relay from a single relay. If, beside the mechanical coupling, an electrical coupling also is to take place, then it is provided that at least one double contact spring is present, one part of which is allocated to the one spring bracket the other part of which is allocated to the oppositely lying spring bracket, and two contact springs are connected by the coupling element over an electrically conducting connection web.Type: GrantFiled: July 19, 2001Date of Patent: August 17, 2004Assignee: Hengstler GmbHInventor: Henning Zschau
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Patent number: 6765464Abstract: An electromagnetic switching relay having a base member and a magnetized coil. The base member having first guide elements. The magnetized coil having a terminal and second guide elements positioned substantially between the first guide elements that engage the first guide elements. A partition layer that allows displacement of the magnetizing coil relative to the base member before the second guide elements engage the first guide elements and fixes the second guide elements to the first guide elements when the base member and the magnetized coil are pushed toward each other.Type: GrantFiled: August 16, 2002Date of Patent: July 20, 2004Assignee: Tyco Electronics AMP GmbHInventors: Karsten Pietsch, Lutz Woske
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Patent number: 6661320Abstract: A safety relay comprising an electrically insulating carrier part, an electromagnetic drive arranged on the carrier part, at least one control contact arranged on the carrier part, at least three load contacts arranged on the carrier part wherein each of the load and control contacts is forcibly guided by a common comb connected with the electromagnetic drive and each load and control contact having two contact springs, each of the contacts springs comprising, a contact head, a spring foot at a distance from the contact head, and at least one fastener part connected with the spring foot, the contact springs being supported solidly with the spring foot in the carrier part wherein at least one of the contacts forms a working contact and another one a resting contact, a rigid stop arranged on the carrier part next to which is located the contact head in the vicinity of one of the contact springs, the other one of the contact springs of the contact engaging the comb in such a way that the movement of the contactType: GrantFiled: January 24, 2001Date of Patent: December 9, 2003Assignee: Elesta Relays GmbHInventor: Werner Fausch
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Patent number: 6549108Abstract: A safety relay comprising a separating wall, an electromagnetic drive located on a first side of the separating wall comprising a coil with core and yoke, the coil being connectable to a control current, the core being oriented parallel to the separating wall, and a movable armature, a comb located on a second side of the separating wall capable of moving parallel to the separating wall by means of the armature, and a row of several contacts located on the second side of the separating wall actuated by the drive comb, each of the contacts comprising at least two contact elements arranged on an electrically insulating carrier part each of the contacts being connected with a current connection element, at least one of the contact elements being formed by an elongated contact spring arranged between the comb and the separating wall, the contact spring being arranged with a spring longitudinal axis crosswise to the direction of the movement of the comb, forcibly guided by the comb and by a spring foot at one endType: GrantFiled: March 29, 2001Date of Patent: April 15, 2003Assignee: Elesta relays GmbHInventor: Werner Fausch
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Patent number: 6075429Abstract: A single-pole relay switch capable of effective arc extinction irrespective of the current flowing directions in which the device is connected in a circuit. The switch has a housing and two sets of contacts located in the housing, each set being composed of a fixed contact and a movable contact. A contact carrier is provided to have first and second movable arms which extend commonly from a bridge and are provided respectively with the two movable contacts. An actuator applies a driving force to move the contact carrier between an ON-position of holding the movable contacts simultaneously in contact respectively with the fixed contacts, and an OFF-position of keeping the movable contacts at respective opening gaps from the fixed contacts. The housing includes a casing which is divided into first and second chambers respectively for receiving the contact sets, each of the first and second chambers being surrounded by a dielectric wall.Type: GrantFiled: August 13, 1999Date of Patent: June 13, 2000Assignee: Matsushita Electric Works, Ltd.Inventors: Riichi Uotome, Takehiko Toguchi, Ritsu Yamamoto, Masahiro Ito, Narutoshi Hoshino
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Patent number: 6034585Abstract: The invention relates to a switching device having a main electromagnetic drive for connecting and disconnecting a moving contact piece to fixed contact elements, and having an auxiliary electromagnetic drive which, in the event of an overload current flowing via the moving contact piece, in the ON state exerts an additional contact pressure of the contact piece on the fixed contact elements. A lever mounted in the moving contact carrier is also is provided to transmit the additional contact pressure.Type: GrantFiled: October 21, 1998Date of Patent: March 7, 2000Assignee: Siemens AGInventor: Peter Donhauser
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Patent number: 5945900Abstract: An electromagnetic contactor includes an iron core members formed of a first core bent in a U-shape, and a second L-shaped core contacting the first core. A coil is wound around a spool disposed on an upper arm of the first core and the second core to form a main leg while a lower arm of the first core constitutes a yoke. Thus, the iron core members can be processed by a press machine operating at a normal cutting speed, and welding and polishing operations can be eliminated to thereby reduce the number of processing steps required.Type: GrantFiled: July 3, 1997Date of Patent: August 31, 1999Assignee: Fuji Electric Co., Ltd.Inventors: Katsumi Shibata, Takato Hirota, Noriyoshi Machida, Makoto Kawasaki, Etsuya Hiramatsu
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Patent number: 5907268Abstract: A relay is provided with fixed contact mounts anchored in a base, as well as contact springs arranged between the fixed contact mounts. The springs are actuated at their free ends. The contact springs each have spring mounts that include terminal segments anchored in the base, respectively parallel to the fixed contact mounts, but outside the space enclosed by them. These terminal segments are connected with the appertaining contact springs via U-shaped connection segments; the connection segments are guided in corresponding guide channels of the base in an insulated fashion. In this way, several sets of switchover contacts can be arranged in simple and space-saving fashion in a relay base, given a predetermined terminal configuration.Type: GrantFiled: July 1, 1998Date of Patent: May 25, 1999Assignee: EH-Schrack Components AGInventor: Leopold Mader
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Patent number: 5894254Abstract: A relay is formed by a magnet system containing a wound coil body, an L-shaped core arranged axially therein, an L-shaped armature and a base element with terminal elements. Stationary and moving contact elements are arranged between the base element and the magnet system. The armature is mounted with the free end of its transverse leg at the free end of the longitudinal leg of the core. The armature is secured through a U-shaped armature spring wrapping around the armature. The spring is secured with one arm at the longitudinal leg of the armature and a second arm is inserted in a recess between the coil body and the core. The actuation of the moving contact elements is provided via a slide coupled to the armature. This slide is hooked to the armature by spring tabs of the armature spring at opposing sides of the armature through snap latches formed at the ends of the side arms of the slide.Type: GrantFiled: April 16, 1998Date of Patent: April 13, 1999Assignee: EH Schrack Components AGInventors: Klaus Reiter, Zoran Gmajner, Ernst Bittermann
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Patent number: 5886601Abstract: An electromagnetic relay assembly includes an actuator unit and at least one switch unit detachably connected with the actuator unit. The actuator unit includes an actuator casing accommodating therein an electromagnetic assembly and a movable actuator frame magnetically attracted by the electromagnetic assembly to move between first and second positions. The switch unit Includes a switch casing accommodating therein a switch assembly capable of selectively assuming one of an ON state in response to movement of the movable actuator frame from the first position to the second position and an OFF position in response to movement of the movable actuator frame from the second position to the first position. The actuator casing and the switch casing have mating engagement members by which the actuator unit and the switch unit can be separably connected together while the movable actuator frame in the actuator unit can be drivingly coupled with the switch assembly In the switch unit.Type: GrantFiled: July 28, 1997Date of Patent: March 23, 1999Assignee: Matsushita Electric Works, Ltd.Inventors: Nobuhiro Kitamura, Hiroaki Hamaguchi, Naoki Kanemoto, Masahiro Kutsuna, Tetsuyasu Kawamoto
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Patent number: 5864269Abstract: An electromagnetic hinged-armature relay comprises a contact spring (2) which is arranged on and attached to an armature (1). The contact spring serves as a switching contact spring and has a bounce dampener which is in the form of a swing element (3) made as one piece with the contact spring which greatly reduces bounces of contacts and contact wear resulting therefrom.Type: GrantFiled: November 21, 1996Date of Patent: January 26, 1999Assignee: Hella KG Hueck & Co.Inventors: Andreas Grueber, Wolfgang Hoffmann, Andre Koerner, Maik Zimmer
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Patent number: 5831502Abstract: Relay with positively guided contact or contact sets, each contact being accommodated in a chamber and being at least partially separated from the adjacent contacts, and, furthermore, an actuator being provided for respectively opening and closing the contacts, the actuator being of multi-component design. The components of the actuator can be displaced with respect to one another here, the drive not acting on all the components of the actuator.Type: GrantFiled: July 9, 1997Date of Patent: November 3, 1998Assignee: Hengstler GmbHInventor: Eberhard Kirsch
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Patent number: 5568108Abstract: A safety relay has a guided contact set and a monostable drive with a H-armature. The individual contacts of the set of contacts are located in separate chambers and are actuated by a common armature. In order to miniaturize the relay while having a low power consumption, a mechanically symmetrical H-armature with an asymmetrical magnetic effect is provided to ensure the monostable drive. The longitudinal axis of the H-armature is approximately parallel to the longitudinal axis of the driving coil and the axis of rotation of the H-armature is perpendicular to the longitudinal axis of the driving coil. The actuator is actuated by an actuating plate which prolongs the H-armature.Type: GrantFiled: September 12, 1994Date of Patent: October 22, 1996Inventor: Eberhard Kirsch
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Patent number: 5539364Abstract: Relay having a coil, a magnetic system and a contact system which is actuatable via a comb of an electrically insulating material by the magnetic system and includes two pole paths, with the contact system being arranged in a casing comprised of a base member and a cover. In order to accomplish a separation of the pole paths, the comb (6) has a plate-shaped lug (7) which is guided in grooves (9, 16) arranged in the base member (1) and/or in the cover (17) and which extends between two pole paths of the contact system.Type: GrantFiled: June 30, 1994Date of Patent: July 23, 1996Assignee: EH-SCHRACK COMPONENTS AktiengesellschaftInventor: Leopold Mader
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Patent number: 5515019Abstract: A relay has a polarized magnetic system (2) with a three-pole magnet (17) arranged above a coil (14) and rocking armature (18) which actuates a contact spring (30) arranged beneath the coil by means of a frontally arranged slide (23). The contact spring (30) is inserted from one side into the base body, by means of an elongated spring carrier (29), whereas a counter contact element (33) is inserted therein from the opposite side. This relay allows with a compact design long insulating sections between the magnetic system and the set of contacts, as well as a short circuit-resistant design of the set of contacts.Type: GrantFiled: November 8, 1994Date of Patent: May 7, 1996Assignee: Siemens AktiengesellschaftInventor: Helmut Schedele
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Patent number: 5392015Abstract: An electromagnetic relay which is small in size, low in power consumption, high in productivity, and long in service life and which operates with high accuracy. The electromagnetic relay in which the electromagnet is energized and deenergized to swing its armature to drive a slide card, and a movable contact piece forming a contact mechanism is swung by the card, wherein a small gap is formed between the movable contact piece and a part of an end of the card, when the card is returned.Type: GrantFiled: May 13, 1993Date of Patent: February 21, 1995Assignee: Omron CorporationInventors: Kazushige Matsuoka, Masato Kouzaki, Takashi Noguchi
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Patent number: 5239281Abstract: In an electromagnetic relay wherein a movable contact spring (9) and a stationary contact spring (10) are inserted by molding into a base block (8), the width of a portion of the movable contact spring and the stationary contact spring within the base block is made larger than that of a portion thereof outside of the base block.Type: GrantFiled: August 7, 1992Date of Patent: August 24, 1993Assignee: Takamisawa Electric Co., Ltd.Inventors: Noboru Tomono, Atsuto Kobayashi
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Patent number: 5160910Abstract: An electromagnetic relay, comprising: a case consisting of a terminal base and a cover fitted thereon; a pair of contact units arranged laterally on the terminal base; an electromagnet unit arranged in the case on a longitudinal end of the contact units; an upper longitudinal insulating wall depending from an upper inner wall surface of the cover between different ones of the contact units; a lower longitudinal insulating wall projecting from an inner surface of the terminal base so as to correspond to the upper longitudinal insulating wall; and an actuating member made of electrically insulating material for transmitting a drive force of an armature of the electromagnet unit to the contact units; a guide structure being defined between a lower end of the upper longitudinal insulating wall and an upper end of the lower longitudinal insulating wall so as to guide movement of the card along a longitudinal direction as it is actuated by an armature of the electromagnet unit to actuate the contact units between tType: GrantFiled: June 6, 1990Date of Patent: November 3, 1992Assignee: Omron CorporationInventor: Hideaki Tsuji
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Patent number: 5111171Abstract: A relay with a safety spring set such that the spring contact sets are arranged in chambers, which are freely accessible from the outside via openings when the cover is removed so that the spring contact sets can be manipulated. To prevent broken pieces from ending up in the other regions of the relay in the event of breakage of the contact springs of the spring contact sets, the cover has inwardly directed projections which seal the openings of the chambers when the cover is in place.Type: GrantFiled: September 7, 1990Date of Patent: May 5, 1992Assignee: Hengstler Bauelemente GmbHInventors: Jochen von Bonin, Eberhard Kirsch
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Patent number: 4707675Abstract: An electromagnetic relay includes a base of electrically insulation for mounting an electromagnet, an armature and at least one contact assembly including a movable contact. Integrally molded with the base is an envelope having side walls and a top wall for receiving therein the electromagnet which envelope defines on the base outwardly thereof a space for mounting the contact assembly. The side wall of the envelope extends along the entire length of the electromagnet in order to completely separate the contact assembly located outwardly of the envelope from the electromagnet along the entire length thereof for increased insulation resistance therebetween. The armature is mounted on the top wall of the envelope to be movable within a horizontal plane on the top wall and is operatively connected to the movable contact of the contact assembly by a card extending over the side wall adjacent thereto.Type: GrantFiled: March 28, 1986Date of Patent: November 17, 1987Assignee: Matsushita Electric Works, Ltd.Inventors: Masanori Motoyama, Toyotaka Nishikawa, Masashi Nakagawa