Plural Latch Or Combined Latch Operating Means For Single Latch Patents (Class 335/22)
  • Patent number: 10614987
    Abstract: A manual opening assembly includes a manual actuator assembly. The manual actuator assembly includes a handle assembly and a number of operating levers. The handle assembly includes a handle member structured to be movably coupled to a circuit breaker housing assembly and to move between an operating position and an opening position. The handle member is operatively coupled to the number of operating levers. The number of operating levers are movably coupled to a circuit breaker housing assembly. The operating levers are structured to move between an operating position, wherein the operating levers do not operatively engage a linkage assembly, and an opening position, wherein the operating levers operatively engage the linkage assembly and move the linkage assembly from a closed, second configuration to an open, first configuration.
    Type: Grant
    Filed: November 9, 2017
    Date of Patent: April 7, 2020
    Assignee: EATON INTELLIGENT POWER LIMITED
    Inventors: Tyler Louis Holp, Brad Robert Leccia, Douglas Michael Brandt, Paul Bottegal
  • Patent number: 9040864
    Abstract: A profiled arc splitter plate for a switch having a fixed contact and a movable contact is provided to increase electromagnetic attractive forces on the arc generated during contact separation. The plate (300) comprises a body (306) defining an operatively inverted substantially V-shaped recess having a center notch (302) provided at the vertex of the recess and at least one protrusion (304) defined on either side of the center notch (302) along the inclined side walls of the recess, the movable contact of the switch displaceable through the recess without contacting the inclined side walls, in a spaced apart manner from the protrusions (304) and the center notch (302). Chamfers 308 are provided at an end of the plate (300) proximal to the vertex of the recess to provide an exit for hot gases towards the vent of the arc chamber.
    Type: Grant
    Filed: August 31, 2013
    Date of Patent: May 26, 2015
    Assignee: ASCO Power Technologies, L.P.
    Inventor: Varsha Kundalik Kharade
  • Publication number: 20150123751
    Abstract: A vacuum interrupter includes a fixed contact and a movable contact; a driving unit including a main shaft and a plurality of links interlocked with the main shaft, to supply a driving force to open and close the vacuum interrupter; a power transmission unit to transmit a driving force of the driving unit to the movable contact; an over-current relay to detect a fault current and to output a trip signal to break a large-scaled current conduction; a trip unit to generate and transmit a mechanical operation force to the driving unit when a trip signal is output from the over-current relay; and a Thomson drive including a Thomson coil and a repulsive plate, to rotate the main shaft to an opening position or to transmit the trip signal to the trip unit, to promptly breaking a fault current.
    Type: Application
    Filed: October 22, 2014
    Publication date: May 7, 2015
    Applicant: LSIS CO., LTD.
    Inventors: Hyun Wook LEE, Young Woo JEONG, Jin Hyun PARK
  • Patent number: 8390405
    Abstract: A circuit breaker comprises a latching plate rotatably coupled to a moveable plate, and tensile type latching springs, each latching spring having two ends fixed to the latching plate and the moveable plate, respectively. Time taken for a moveable contact to be lifted up from a contact time point between the moveable contact and a fixed contact may be shortened, and thus a time duration for which an accident current flows may be reduced. Accordingly, the amount of energy applied to the circuit breaker may be reduced, and a breaking function of the circuit breaker may be enhanced. Furthermore, since a contact pressure between the moveable contact and the fixed contact has a constant change, a reliability on a conductive state of the moveable contact and the fixed contact may be enhanced.
    Type: Grant
    Filed: January 11, 2011
    Date of Patent: March 5, 2013
    Assignee: LS Industrial Systems Co., Ltd.
    Inventor: Seung Pil Shin
  • Patent number: 7999641
    Abstract: A bimetal in a circuit breaker can deflect in a first direction or a second direction depending upon conditions. If the bimetal deflects in the second direction it can increase the force necessary to operate a trip mechanism of the circuit breaker. A yoke stop helps to control bimetal deflection forces and thus, the amount of force necessary to operate the trip mechanism. This allows better control, size, and selection of operating parts for the circuit breaker.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: August 16, 2011
    Inventors: William J. Broghammer, Cameron L. Woodson
  • Patent number: 7986203
    Abstract: A multi-pole circuit breaker and method include at least two breaker modules including circuit breakers therein. The circuit breakers include a moveable arm configured to connect and disconnect contacts therein. The at least two modules including armatures connectable to the moveable arms of each of the at least two modules. A center module connects the at least two modules. The center module includes an actuator and a beam connected to the actuator at a mid-portion. The beam connects to each armature of the at least two modules wherein under a trip condition the actuator displaces the beam to simultaneously trip the at least two modules using the armatures.
    Type: Grant
    Filed: February 13, 2009
    Date of Patent: July 26, 2011
    Assignee: Siemens Industry, Inc.
    Inventor: Russell T. Watford
  • Patent number: 7920037
    Abstract: A fault interrupter and load break switch includes a trip assembly configured to automatically open a transformer circuit electrically coupled to stationary contacts of the switch upon the occurrence of a fault condition. The fault condition causes a Curie metal element electrically coupled to at least one of the stationary contacts to release a magnetic latch. The release causes a trip rotor of the trip assembly to rotate a rotor assembly. This rotation causes ends of a movable contact of the rotor assembly to electrically disengage the stationary contacts, thereby opening the circuit. The switch also includes a handle for manually opening and closing the electrical circuit in fault and non-fault conditions. Actuation of the handle coupled to the rotor assembly via a spring-loaded rotor causes the movable contact ends to selectively engage or disengage the stationary contacts.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: April 5, 2011
    Assignee: Cooper Technologies Company
    Inventors: Kurt Lawrence Lindsey, Randal Vernon Malliet
  • Patent number: 7920365
    Abstract: The present invention is directed to a protective device that includes a housing having a plurality of line terminals, a plurality of load terminals, and a plurality of user-accessible terminals accessible via apertures disposed in a front major surface of the housing. A fault detection assembly is coupled to the plurality of line terminals, the fault detection circuit being configured to provide a fault detection output in response to detecting a fault condition. A circuit interrupter is coupled to the fault detection assembly. The circuit interrupter includes a first set of interrupting contacts configured to provide electrical continuity between the plurality of line terminals, the plurality of load terminals, and the plurality of user-accessible terminals in a reset state.
    Type: Grant
    Filed: June 29, 2009
    Date of Patent: April 5, 2011
    Assignee: Pass & Seymour, Inc.
    Inventors: Richard Weeks, Gerald R. Savicki, Jr.
  • Patent number: 7683745
    Abstract: A ground fault circuit interrupter device is described.
    Type: Grant
    Filed: July 28, 2006
    Date of Patent: March 23, 2010
    Assignee: Cooper Technologies Company
    Inventors: Erik J. Gouhl, Gregory G. Moreinis, Gunter A. Gallas
  • Patent number: 7583170
    Abstract: There is described a switching device whose disconnection cause can be identified, and a method for displaying the disconnection cause of a switching device. The switching device has a switch latch for mechanical activation of the switching device, a first tripper for overload protection, a second tripper for short-circuit protection, and a handle for activating the switch latch. The switching device is embodied in such a way that the handle is moved to a first position or a second position if the first tripper or second tripper is tripped, with the first position and the second position being different.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: September 1, 2009
    Assignee: Siemens Aktiengesellschaft
    Inventors: Christian Gogeissl, Manuela Lüftl, Ludwig Niebler
  • Patent number: 7554781
    Abstract: The present invention is directed to a protective device that includes a plurality of line terminals, a plurality of load terminals, and a fault detection assembly coupled to the plurality of line terminals. The fault detection circuit is configured to provide a fault detection output in response to detecting a fault condition. A circuit interrupter is coupled between the plurality of line terminals and the plurality of load terminals. The circuit interrupter includes a first set of contacts, the first set of contacts being configured to close to establish at least one electrically continuous path between the plurality of line terminals and the plurality of load terminals in a reset state. The first set of contacts are also configured to open to disconnect the at least one electrically continuous path in response to the fault detection output to enter a tripped state. An auxiliary switch is coupled to the fault detection assembly.
    Type: Grant
    Filed: April 19, 2005
    Date of Patent: June 30, 2009
    Assignee: Pass & Seymour, Inc.
    Inventors: Richard Weeks, Gerald R. Savicki, Jr.
  • Patent number: 7541899
    Abstract: Disclosed are a multi-pole circuit breaker and an apparatus for preventing deformation of a driving shaft thereof. The multi-pole circuit breaker includes: a plurality of single pole breaking units having a pair of fixed contactors, a movable contactor, and shafts; a switching mechanism disposed on a certain one of the plurality of single pole breaking units; a pair of driving shafts connected to each shaft; and a driving shaft deformation prevention unit disposed between the single pole breaking unit, spaced relatively far from the switching unit among the plurality of single pole breaking units, and the adjacent single pole breaking unit.
    Type: Grant
    Filed: September 26, 2006
    Date of Patent: June 2, 2009
    Assignee: LS Industrial Systems Co., Ltd.
    Inventor: Byoung-Soo Ahn
  • Patent number: 7538644
    Abstract: Disclosed is a multi-pole circuit breaker. The multi-pole circuit breaker includes: a substrate disposed between the single pole breaking unit, spaced relatively far from the switching mechanism as compared to the other single pole breaking units among the plurality of single breaking units, and the adjacent single pole breaking unit; a link mechanism rotatably supported on the substrate; and springs having one ends supported by the substrate and the other ends supported by the link mechanism.
    Type: Grant
    Filed: September 25, 2006
    Date of Patent: May 26, 2009
    Assignee: LS Industrial Systems Co., Ltd.
    Inventor: Ki-Hwan Oh
  • Patent number: 7518475
    Abstract: A circuit interrupter includes a housing, separable contacts, and an operating mechanism including a latch. The operating mechanism opens the contacts responsive to actuation of the latch. A trip mechanism cooperates with the latch to trip open the contacts. The trip mechanism includes a thermal overload mechanism actuating the latch responsive to a thermal fault caused by current flowing through the contacts, a solenoid cooperating with the thermal overload mechanism to actuate the latch responsive to the electromagnetic device being energized, and a processor repetitively determining a value of the current flowing through the contacts, determining if the value exceeds a predetermined value for a number of occurrences, and responsively energizing the solenoid, in order to actuate the latch contemporaneous with actuation of the latch by the thermal overload mechanism, in order to decrease the time to trip open the contacts.
    Type: Grant
    Filed: July 24, 2007
    Date of Patent: April 14, 2009
    Assignee: Eaton Corporation
    Inventors: Patrick W. Mills, Kevin D. Gonyea, Richard G. Benshoff, James M. McCormick
  • Patent number: 7352265
    Abstract: A manual trip control method and arrangement is provided to manually trip a plurality of circuit interrupters. Specifically, where the circuit interrupters include magnetic-actuator-driven vacuum interrupters including permanent magnets that hold the contacts of the circuit interrupter in the closed position via a plunger, a first of the circuit interrupters is manually tripped via movement of the plunger. To operate the remaining circuit interrupters to trip open, the voltage generated in the magnetic actuator of the first circuit interrupter is coupled to the magnetic actuators of the remaining circuit interrupters for tripping thereof.
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: April 1, 2008
    Assignee: S & C Electric Co.
    Inventors: John C. Opfer, Christopher R. Lettow
  • Patent number: 7268654
    Abstract: A latching mechanism for a movable member mounted for movement between first and second positions. The latching mechanism includes a primary latching mechanism mounted for movement between a latched position where the primary latching mechanism engages the movable member to allow the movable member to move between the first and second positions, and an unlatched position where the movable member is disengaged for movement to the second position. A secondary latching element engages the first latching mechanism to hold the primary latching mechanism in the latched position, the secondary latching element being movable to move the primary latching mechanism to the unlatched position while remaining in engagement with the primary latching mechanism.
    Type: Grant
    Filed: December 29, 2004
    Date of Patent: September 11, 2007
    Assignee: Square D Company
    Inventors: Jeremy D. Dorn, Jeffrey M. Kaufman, Kenneth L. Winter, Cameron L. Woodson, Chad R. Mittelstadt
  • Patent number: 7132912
    Abstract: The moving contact unit (10) is intended for a contact arrangement in a circuit breaker and contains a contact mount (13) and a contact piece (11, 111, 112), which is held by the contact mount (13). The contact mount (13) is arranged on a pivoting shaft (12), which can be mounted in the switch, and is fitted with a catch (135) which can pivot, and with a tripping lever (14) which can pivot and, together with the catch (135), forms a latching point. A simple configuration for the contact unit and for the contact arrangement which holds this contact unit is made possible, despite stringent requirements for maintenance of the circuit breaker and despite a high disconnection rating in that the tripping lever (14) is also arranged on the pivoting shaft (12) alongside the contact mount (13), and in that the contact piece (11) is placed on the contact mount (13) and is held by at least one prestressed bending spring (51), which is mounted on the pivoting shaft (12).
    Type: Grant
    Filed: June 15, 2005
    Date of Patent: November 7, 2006
    Assignee: ABB Schweiz AG
    Inventor: Thomas Busenhart
  • Patent number: 6348847
    Abstract: A making operation preventing device 130 has a releasing trigger 19 for retaining, via a releasing latch 18, a breaking lever 36 to which a torque in a counterclockwise direction is applied by an opening torsion bar 34; a releasing electromagnet 20 for opening an on-off contact 10 by releasing the engagement between the releasing trigger 19 and the releasing latch 18 to rotate the breaking lever 36 in a counterclockwise direction; a cam 3 rotated as one body with a gear 40 connected via a link 41 to a making lever 37 to which a torque in a counterclockwise direction is applied by a closing torsion bar 35; a making trigger 15 which retains a second pin 13 attached to the cam 3 via a making latch 14 and maintains the closing torsion bar 35 in a prestressing state; a releasing electromagnet 16 for driving a trigger lever 16d in a right direction to release the engagement between the making latch 14 and the making trigger 15, and an interlocking electromagnet for rotating the trigger lever 16d in a counterclockwi
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: February 19, 2002
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Nobuya Nakajima, Kyouichi Ohtsuka
  • Patent number: 5872495
    Abstract: A thermal and magnetic trip unit for a multi-pole circuit breaker includes a thermal structure having a bimetallic element and one or more heater elements. Each of the heater elements and a portion of the bimetallic element is generally "U" shaped defining a conductive path which extends from one leg of the U to the other leg. The heater elements and bimetallic element may be configured in parallel to reduce the level of current flowing through the bimetallic element and thus increase the current level at which the bimetallic element will trip the breaker. Alternatively, the heater elements may be configured in series with the bimetallic element, by inserting electrical insulators between the bimetallic element and each of the heater elements and connecting the various "U" shaped elements using a connecting bus which connects the second leg of one element to the first leg of the next element.
    Type: Grant
    Filed: December 10, 1997
    Date of Patent: February 16, 1999
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: Bernard DiMarco, James E. Ferree, Robert E. Black
  • Patent number: 5142259
    Abstract: The secondary latch of a molded case circuit breaker latching arrangement is formed from a latching pin assembly with a solid metal latching sphere rotatably mounted at one end thereof. The latching sphere contacts the operating mechanism latching plate to provide a low-friction latching force to the circuit breaker operating mechanism. The latching sphere contacts the latching plate and is continuously lubricated by means of a lubrication reservoir integrally-formed within the latch pin assembly.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: August 25, 1992
    Assignee: General Electric Company
    Inventors: Joseph B. Kelaita, Jr., Roger N. Castonguay
  • Patent number: 5059933
    Abstract: A molded case circuit breaker of the type containing an electronic trip unit and a combined acutator-accessory unit to articulate the circuit breaker operating mechanism employs an optimum cradle configuration within the circuit breaker operating mechanism. The optimized cradle interacts with the circuit breaker latch assembly to substantially reduce the tripping force required to articulate the operating mechanism.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: October 22, 1991
    Assignee: General Electric Company
    Inventors: Roger N. Castonguay, David Arnold
  • Patent number: 5023582
    Abstract: A molded case circuit breaker employs a multiple latch assembly for maintaining the circuit breaker operating mechanism in a closed condition. The multiple latch assembly includes three separate latch levers mounted on a common latch support frame. The multiple latch arrangement substantially reduces the amount of tripping force required to articulate the circuit breaker operating mechanism.
    Type: Grant
    Filed: May 21, 1990
    Date of Patent: June 11, 1991
    Assignee: General Electric Company
    Inventors: Laura A. Williams, Gary D. Magnon, Michael C. von Kannewurff, Raymond K. Seymour
  • Patent number: 5014025
    Abstract: An integrated protection unit is a circuit breaker which includes basic overcurrent protection facility along with selective electrical accessories. A molded plastic accessory access cover secured to the integrated protection unit cover protects the accessory components contained within the integrated protection unit cover from the environment. A combined overcurrent trip actuator and multiple accessory unit can be field-installed within the integrated protection unit. The combined actuator-accessory unit includes electronic control circuitry for the accessories along with mechanical trip and reset interface components. The reset mechanism allows the actuator-accessory unit to become reset without interfering with the operation of the integrated protection unit.
    Type: Grant
    Filed: May 3, 1990
    Date of Patent: May 7, 1991
    Assignee: General Electric Company
    Inventors: Thomas F. Papallo, Jr., Roger N. Castonguay
  • Patent number: 4876424
    Abstract: A barrier for isolating the electrical contacts of a circuit breaker from the operating mechanism for the contacts. The barrier includes openings to allow the operating mechanism to pass through the barrier, and venting channels for venting gas from within the circuit breaker to the exterior of the circuit breaker.
    Type: Grant
    Filed: September 19, 1988
    Date of Patent: October 24, 1989
    Assignee: Siemens Energy & Automation, Inc.
    Inventors: David A. Leone, Clifford A. Buxton, W. Dale Robbins
  • Patent number: 4740768
    Abstract: A manually operated trip operator is inserted within a recess formed in a molded case circuit breaker cover, and extends down within the breaker case to interact with the circuit breaker trip bar. The trip operator is formed from a unitary thermoplastic configuration which integrally includes means for interacting with the circuit breaker trip bar and for biasing the trip operator back to its initial position. The unitary manual trip operator is down-loaded into the circuit breaker cover in an automated circuit breaker assembly process.
    Type: Grant
    Filed: June 29, 1987
    Date of Patent: April 26, 1988
    Assignee: General Electric Company
    Inventors: Robert A. Morris, Roger N. Castonguay, Joseph M. Palmieri
  • Patent number: 4731692
    Abstract: An electronic circuit breaker having a trip solenoid assembly. The trip solenoid assembly includes a permanent magnet, plunger, trip coil and assist coil and is positioned adjacent to a phase conductor. At high current levels the phase conductor generates a flux that may cause the circuit breaker to nuisance trip. An assist coil is wound adjacent the trip coil. The assist coil is energized only when the current through the circuit breaker is of such a level so as to cause nuisance tripping. The assist coil is not energized during that time period when the trip coil is energized.
    Type: Grant
    Filed: October 24, 1986
    Date of Patent: March 15, 1988
    Assignee: Square D Company
    Inventors: Robert F. Dvorak, John M. Winter
  • Patent number: 4713636
    Abstract: A circuit-breaker which includes a housing, an actuator device positioned in generally upstanding relationship to and centrally of the housing, thermal trippers and magnetic trippers mounted on one side of the actuator device, an electromagnetic drive including an armature for operating an associated element, the electromagnetic drive being mounted on a side of the actuator device opposite the thermal and magnetic trippers, a pair of pivotally connecting links, the links being operated by a pivoted yoke by energization of the armature, one of the links having a nose received in a slot of a slide, and the magnetic and thermal trippers also having noses received in slots of a slide such that selective turn-on and turn-off conditions can be achieved manually or automatically.
    Type: Grant
    Filed: July 23, 1986
    Date of Patent: December 15, 1987
    Assignee: Square D Starkstrom GmbH
    Inventors: Helmut Lemmer, Josef Risthaus
  • Patent number: 4679018
    Abstract: A circuit breaker apparatus characterized by a molded case containing a circuit breaker structure for opening and closing a circuit which structure comprises a releasable lever operable between latched and unlatched positions corresponding to open and closed circuit conditions, latch means including a latch lever for the releasable lever, interconnected toggle connected to the latch lever and that are biased to the unlatched position of the lever, and a movable trip bar responsive to predetermined overcurrents and having a projection contacting the toggle links for holding the links in the unbiased position.
    Type: Grant
    Filed: January 15, 1986
    Date of Patent: July 7, 1987
    Assignee: Westinghouse Electric Corp.
    Inventors: Jere L. McKee, Glenn R. Thomas
  • Patent number: 4639561
    Abstract: A mechanical time delay mechanism is shown which provides a predetermined time delay between the movement of the moving contact blade on a circuit breaker and the activation of a switch. The control circuit design of the circuit breaker provides for tripping at one level when the breaker is in the closed position and at a second lower fault level when the circuit breaker is closing and for a predetermined number of cycles thereafter. The subject time delay mechanism activates a switch to change the tripping level from the second level to the first level at the appropriate time. The mechanism includes a pivot link assembly connected directly to the moving contact arm, a ratchet assembly, and a pivot link connecting the two. The pivot link assembly includes a set of springs to delay the movement of the link with respect to the movement of the pivot link in response to an opposing pull on the link.
    Type: Grant
    Filed: December 18, 1984
    Date of Patent: January 27, 1987
    Assignee: Square D Company
    Inventor: Aymon A. Maulandi
  • Patent number: 4639701
    Abstract: A circuit breaker characterized by a circuit breaker structure having separable contacts and a releasable mechanism which mechanism is retained in untripped position by a latch including a rotatable trip bar. A solenoid, that is operable automatically in response to overload current conditions, is located adjacent to the trip bar and has a plunger movable parallel to the axis of the trip bar. A lever is disposed between the plunger and the trip bar to translate longitudinal motion into rotational trip bar motion.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: January 27, 1987
    Assignee: Westinghouse Electric Corp.
    Inventor: Alan B. Shimp
  • Patent number: 4550300
    Abstract: High speed trip facility is provided within a molded case circuit breaker used within industrial applications. The movable contact arm is pivotally arranged to open independently of the trip unit-driven operating mechanism. A "latch kicker" arrangement interfaces between the mechanism trip bar and the circuit breaker intermediate latch whereby rotation of the trip bar causes the latch kicker to immediately displace the intermediate latch from the circuit breaker cradle thereby allowing the interrupter mechanism to untoggle the mechanism and open the breaker contacts.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: October 29, 1985
    Assignee: General Electric Company
    Inventors: Charles L. Jencks, Roger N. Castonguay
  • Patent number: 4532486
    Abstract: A low voltage circuit breaker in a moulded case comprises a breaker unit (10) and a remote control unit coupled to it that controls the swing of a bistable movable contact (22) housed in the breaker unit. A trip mechanism (50) cooperates with movable contact (22) in the case of a fault to swing movable contact (22) into open circuit position independently of the remote control mechanism (48). A resetting handle (88) must be actuated in order to render the circuit breaker reoperative.
    Type: Grant
    Filed: October 27, 1983
    Date of Patent: July 30, 1985
    Assignee: Merlin Gerin
    Inventor: Gerard Terrier
  • Patent number: 4529951
    Abstract: A remote control system circuit breaker which latches a trip link and a latch link by the spring force of return springs so that on- or off-hold of a movable contactor supported from the latch link depends upon a holding force of an operating electromagnet pivotally connected to a handle, thereby achieving miniaturization of the electromagnet, in turn the circuit breaker, and a saving of power consumption of the electromagnet.
    Type: Grant
    Filed: September 29, 1983
    Date of Patent: July 16, 1985
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Yokoyama Youichi, Kondo Hideya
  • Patent number: 4524339
    Abstract: A pair of toggle links in a high amperage molded case circuit breaker are driven over center in response to the discharge of a closing spring for pivoting a plurality of blades and closing the breaker contacts. A latch link pivotally connected to the upper toggle link also is engaged by a pivotable latch along an arcuate surface on the latch so that shock forces are transmitted along a radial line of the latch for minimizing inadvertent rotational forces on the latch. The latch release force is rendered dependent on the spring force exerted through the links from the blade overtravel springs and the coefficient of friction of the latch arcuate surface. The force exerted through the links is controlled by an adjustable stop having an inclined surface engaging the pivot connection between the toggle links. Large movements of the stop provide small changes in the inclined surface position relative the pivot connection to provide small changes in the overcenter position.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: June 18, 1985
    Assignee: Square D Company
    Inventor: Ferdinand E. Chabot
  • Patent number: 4484165
    Abstract: A remotely controlled circuit control device has first and second load contact assemblies movable into circuit engagement and circuit disengagement positions relative to one another in which one load contact assembly is operatively connected to a solenoid so that alternate forward strokes of the solenoid moves the one load contact assembly between reset and tripped positions through a push-push mechanism having an indexing portion and a latching portion. An overload mechanism cooperates with the latch portion to cause the load contact assemblies to move to the circuit disengaged position upon occurrence of a fault condition. The second load contact assembly includes pivotably mounted contact members which are linked to the first load contact assembly in such a way that circuit engagement during solenoid energization is precluded.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: November 20, 1984
    Assignee: Texas Instruments Incorporated
    Inventors: Aime J. Grenier, Robert W. Peterson
  • Patent number: 4475094
    Abstract: A remotely controlled circuit control device has first and second load contact assemblies movable into circuit engagement and circuit disengagement positions relative to one another in which one load contact assembly is operatively connected to a solenoid so that alternate forward strokes of the solenoid moves the one load contact assembly between reset and tripped positions through a push-push mechanism having an indexing portion and a latching portion. An overload mechanism cooperates with the latch portion to cause the load contact assemblies to move to the circuit disengaged position upon occurrence of a fault condition. The second load contact assembly includes pivotably mounted contact members which are linked to the first load contact assembly in such a way that circuit engagement during solenoid energization is precluded.
    Type: Grant
    Filed: July 6, 1982
    Date of Patent: October 2, 1984
    Assignee: Texas Instruments Incorporated
    Inventors: Aime J. Grenier, Robert W. Peterson, Odd Larsen
  • Patent number: 4344054
    Abstract: A pivotally mounted primary latch lever carries a latch pin for latchingly engaging a cradle to sustain it in a reset position against the bias of the breaker mechanism operating springs. An intermediate latch lever, pivotally mounted to the primary latch lever, is formed with a pair of latch shoulders for respective latching engagement with a pair of latch pins associated with a pivotally mounted secondary latch lever. The geometry of the latch assembly parts and their various latching engagements are such that an exceptionally light trip initiating force on the secondary latch lever is effective in releasing the cradle from its reset position.
    Type: Grant
    Filed: March 4, 1981
    Date of Patent: August 10, 1982
    Assignee: General Electric Company
    Inventors: Roger N. Castonguay, Charles L. Jencks, Peter P. Clickner
  • Patent number: 4342974
    Abstract: A multipolar type circuit breaker has a plurality of breaker element assemblies corresponding to AC source pole number. Each assembly comprises a contact operating mechanism for ON and OFF operations of a movable contactor connected to a load side terminal with respect to a fixed contactor connected to a current source side terminal. A trip mechanism forms an electric current path between the movable contactor and the load side terminal an interlinks with the contact operating mechanism for releasing its normal ON position latch with respect to the movable contactor upon incoming of a excessive curent to arbitrarity trip ON state. The assemblies are housed in a single housing in a mutually parallel and aligning relation. The contact operating mechanisms in all assemblies are operated by a single handle extending transversely to them within the housing.
    Type: Grant
    Filed: December 9, 1980
    Date of Patent: August 3, 1982
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kunimitsu Nakano, Kunio Takemura
  • Patent number: 4123734
    Abstract: A three pole molded case circuit breaker including a push-to-trip button, a flux transfer shunt trip mechanism, an undervoltage trip mechanism, and an improved latch mechanism. The latch mechanism comprises a metal trip bar covered with insulating tubing and adapted for translational movement to actuate the latch mechanism and trip the contacts. Contact carrier movement during the tripping operation serves to reset the latch mechanism.
    Type: Grant
    Filed: October 6, 1976
    Date of Patent: October 31, 1978
    Assignee: Westinghouse Electric Corp.
    Inventors: Alfred E. Maier, Robert H. Hill
  • Patent number: 4110717
    Abstract: A high performance, manually and automatically operable, trip-free magnetic circuit breaker incorporates a collapsible linkage having selected elements of precision molded plastic cooperating in a dual latch system, the linkage being adapted to be accurately assembled and mounted in the breaker without requiring adjustment inside the breaker housing; incorporates a double break contact system to achieve longer life, more reliable operation and improved rupture capacity; and incorporates auxiliary switch means with improved actuator biasing to achieve more reliable breaker operation in auxiliary switch applications.
    Type: Grant
    Filed: December 30, 1976
    Date of Patent: August 29, 1978
    Assignee: Texas Instruments Incorporated
    Inventor: Aime J. Grenier