Trip-free Patents (Class 337/74)
  • Patent number: 8154375
    Abstract: This invention relates to an overcurrent protection device, which comprises a housing having a first side mounted with first and second wire terminals and a second side installed with a button, an elastic element installed therein for abutting against the button, a memory alloy plate disposed therein and having a first end connected to the first wire terminal and a free end having a first contact, and an elastic metal sheet having two ends movably connected to the first and free ends respectively. When the button is pressed, an extended rod thereof can push the first contact and cause the memory alloy plate to be deformed for enabling the first contact to contact a second contact on the second wire terminal. When the button is released and shifted away from the first contact, a space will be provided for the first contact to return an original status prior to deformation.
    Type: Grant
    Filed: October 7, 2009
    Date of Patent: April 10, 2012
    Inventor: Tsan-Chi Chen
  • Publication number: 20110080250
    Abstract: This invention relates to an overcurrent protection device, which comprises a housing having a first side mounted with first and second wire terminals and a second side installed with a button, an elastic element installed therein for abutting against the button, a memory alloy plate disposed therein and having a first end connected to the first wire terminal and a free end having a first contact, and an elastic metal sheet having two ends movably connected to the first and free ends respectively. When the button is pressed, an extended rod thereof can push the first contact and cause the memory alloy plate to be deformed for enabling the first contact to contact a second contact on the second wire terminal. When the button is released and shifted away from the first contact, a space will be provided for the first contact to return an original status prior to deformation.
    Type: Application
    Filed: October 7, 2009
    Publication date: April 7, 2011
    Inventor: Tsan-Chi CHEN
  • Publication number: 20090184795
    Abstract: A safety switch has a housing, a conducting assembly, a switching assembly and a resilient member. The housing has an on-end and an off-end. The conducting assembly is mounted in the housing and has two conductors and a bimetal strip. The conductors respectively correspond to the on and off-ends and are attached respectively to two separated ends of a circuit. The bimetal strip selectively connects the conductors. The switching assembly has a rocker and a connecting arm. The rocker is mounted pivotally on a top of the housing. The connecting arm connects the rocker and a contacting end of the bimetal strip. The resilient member is mounted between the on-end of the housing and the rocker to stably position the rocker when the circuit is on or off.
    Type: Application
    Filed: January 22, 2008
    Publication date: July 23, 2009
    Inventor: Albert Huang
  • Patent number: 6512441
    Abstract: A push-button switch with overload protection is disclosed. The switch comprises a housing, a conducting unit, and an actuating unit. The conducting unit comprises several terminals, a normal-open first conducting leaf and a thermally deflecting bimetal sheet. The bimetal sheet is of a U shape having a working end and an opening end. The working end can deflect to an overload position from a normal position in the event of overload. The actuating unit comprises a stem, a positioning means, a rocking lever, an enabling lever, and a lever reseating member. By means of the above structure, a trip action could be assured no matter what happens on the stem.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: January 28, 2003
    Inventor: Tsung-Mou Yu
  • Patent number: 6353380
    Abstract: A power switch device includes a switch body with a switch contact device pivotally connected to a switch cover body. An alloy piece is connected to one of two contact terminals and a second contact joint to which the other contact terminal disengagably contacts when the circuit is closed. The switch contact device has a movable member retractably received therein and the alloy piece contacts one end of the movable member. The end of the movable member is normally supported on a plate in the switch body so that when the current is overloaded, the alloy piece is thermally deformed to push the end of the movable member away from the plate and the switch contact device is therefore pivoted to release a conductive plate pressed by the switch contact device so as to shut the circuit.
    Type: Grant
    Filed: January 27, 2000
    Date of Patent: March 5, 2002
    Inventor: Tsung-Mou Yu
  • Patent number: 6335674
    Abstract: A circuit breaker with a push button includes an electrical breaker having a casing having an opening defined therein with a hole defined in each side near the opening. A first prong and a second prong each attached to and extending through the casing. An alloy plate is attached to the first prong and has a free end aligning with the second prong. A seesaw switch is pivotally mounted in the opening of the casing with a shaft extending from the center of each side. Each of the shafts is received in the corresponding hole in the casing. A push block is pivotally attached to the bottom portion of the seesaw switch and has a recess defined therein to receive the free end of the alloy plate. An activation block extends from a top portion of the seesaw switch. A push button is attached to the electrical breaker and has an activation rod movable back and forth therein. The activation rod presses on the activation block of the seesaw switch and has an axis at a right angle with the axis of the shaft.
    Type: Grant
    Filed: February 23, 2000
    Date of Patent: January 1, 2002
    Inventor: Chao-Tai Huang
  • Patent number: 6307460
    Abstract: A power switch device includes a switch box with a button pivotally connected thereto which is pivotally connected to an actuating member. An engaging member is movably connected to the actuating member and removably engaged with a block. A head connected to the actuating member movably compresses a conduct plate so that when the conduct plate contacts a terminal plate, the circuit is closed. A bimetal plate connected to the terminal plate has a pushing end contacting the engaging member so that when the current is overloaded, the pushing end is thermally deformed to push the engaging member away from the block and the engaging member drops due to gravity. The head is then lifted to release the conduct plate from the terminal plate to open the circuit.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: October 23, 2001
    Inventor: Tsung-Mou Yu
  • Patent number: 6307459
    Abstract: A switch structure comprises a control element, which comprises an alloy piece and a swing contact device. The alloy piece includes an actuating piece with a convex part, which has a upper side normally pushing the lower surface of the end part in the swing contact device so that the actuating piece ejects outwards and escapes from the end part when the alloy piece is overheated because of the current flowing through therein overloaded. Therefore, the end part falls down due to no support force and the head part of the swing contact device deforms upwards and does not press on the elastic contact piece. The elastic contact piece is released from the pressing of the swing contact device to eject upwards. Two joints connected in an electric loop are tripped. The object of rapid response, cutting power source, and safety is therefore achieved.
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: October 23, 2001
    Inventor: Tsung-Mou Yu
  • Patent number: 6275133
    Abstract: A switch structure comprises a control element, which comprises an alloy piece and a swinging device. The swinging device has an actuating element used to actuate the swinging device when the actuating element is pushed. When the alloy piece is overheated due to overloading of current, it will deform toward the actuating element so as to eject the actuating element, which causes the swing device to swing outwards and is released from the supporting of the stopper in the switch body. Then, the swing device moves towards the original closing position, and the elastic contacting piece is released from the pressing of the swing device to eject upwards. Two joints connected in an electric loop are tripped. The object of rapid response, cutting power source, and safety is therefore achieved.
    Type: Grant
    Filed: December 3, 1999
    Date of Patent: August 14, 2001
    Assignee: Tsung-Mou Yu
    Inventor: Chun-Hsu Chen
  • Patent number: 6252489
    Abstract: A switch structure which includes an alloy piece, a contact control device, and a push device is disclosed. The contact control device includes an elastic part and connects to an end part so that the end part may reciprocally move with respect to the contact control device in a horizontal direction. The end part normally contacts with the upper side of the stopper placed in the switch body and is used to push the push device towards the end part when the alloy piece is overheated and strain is generated due to the current flowing through the alloy piece. The end part then elastically contracts and escapes from the stopper to fall down so that another end of the contact control device projects upwards and does not press the elastic contact plate. Therefore, the elastic contact plate may escape from the two contact points to cut off the power source rapidly by the elastic force to achieve the purpose of safety.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: June 26, 2001
    Assignee: Tsung-Mou Yu
    Inventor: Chun-Hsu Chen
  • Patent number: 6249209
    Abstract: A switch structure comprises a switch case, a switch, a contact reed, a control element, a swinging device, and an alloy piece. The swinging device is assembled with the control element. The switch is coupled with the contact reed. When the alloy piece is overheated due to current overloading, it is deformed towards the control element so as to push the swinging device that is then swung away and released from the support of the switch case. As a result, the control element moves towards to an original off position. An elastic contacting piece is released from the pressing of the control element so as to be ejected upwards and break the power supply.
    Type: Grant
    Filed: September 17, 1999
    Date of Patent: June 19, 2001
    Inventor: Tsung-Mou Yu
  • Patent number: 6229426
    Abstract: A circuit breaker (10) is shown having a movable electrical contact (36) adapted to move into and out of engagement with a stationary electrical contact (38, 40). A current carrying thermostatic trip member (42) has a portion movable in response to changes in temperature with a motion transfer member (46) transferring the motion to latch/catch mechanism (20, 24, 30, 32). The catch portion (30, 32) comprises a generally U-shaped adjustment element (30) formed of thermostatic material whose legs are fixed to the base (32a) of a catch member (32) which in turn is pivotably mounted in the casing of the circuit breaker. The bight (30c) of the adjustment element is free to move in response to temperature changes relative to the catch member. Overcurrent will cause the thermostatic trip member to transfer motion to the bight of the adjustment element causing the adjustment element and catch member to pivot and release a latch to thereby open the circuit breaker.
    Type: Grant
    Filed: October 25, 1999
    Date of Patent: May 8, 2001
    Assignee: Texas Instruments Incorporated
    Inventors: Michael J. Lavado, Nathaniel Wicks, Peter G. Berg
  • Patent number: 5153552
    Abstract: A push button operated circuit breaker with thermal tripping by way of a bimetal strip includes an angled contact bridge which is mounted within a switch housing to be freely pivotal and is urged in a tripping direction by a tripping spring against a contact lug of the bimetal strip projecting laterally for engagement with a contact piece of the contact bridge. The circuit breaker further including a connecting arm which is coupled for movement with the bimetal strip. The cylindrical exterior surface of a drum-shaped rotary body lies against the connecting arm and thus creates a kinematic connection between the rotary body and the connecting arm. When the switch housing is fully assembled, the drum-shaped rotary body is operative as an adjustment eccentric which is externally manipulatable by way of a hexagonal recess so as to adjust the tripping characteristic of the circuit breaker.
    Type: Grant
    Filed: April 5, 1991
    Date of Patent: October 6, 1992
    Assignee: Ellenberger & Poensgen GmbH
    Inventor: Fritz Krasser
  • Patent number: 5089799
    Abstract: An electric rocker switch has a thermally responsive movable contact element that is mechanically closed against the fixed contact, but moves by bimetallic thermal action to open when an overcurrent condition exists. A trip flag also moves between the open contacts whenever the switch rocker is moved to OFF, and will remain in this position even if the rocker is held ON, if the bimetallic element has caused the flag to move between the contacts. Trip-free operation is thereby achieved. A spring acts on the trip flag to provide a positive snap action as the flag moves between the contacts. The same spring holds the rocker ON, and serves to hold the flag lightly against the movable contact in the switch ON condition.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: February 18, 1992
    Inventor: Richard W. Sorenson
  • Patent number: 4990882
    Abstract: A push button actuated excess current protection switch, particularly an on-board electrical system protection switch with manual actuation and bimetal controlled automatic tripping includes a switch latch (7) actuated by the push button (41) and a bimetal tripping device for releasing the switch latch (7) with the bimetal tripping device including a self-heated approximately U-shaped punched bimetal (101) which is connected electrically in series in the current path through the switch. The one free arm end (102) of the bimetal is fastened to the end of a connecting lug (5) fixed in the interior of the switch housing. Its second free arm end (104) is fastened to a connecting piece (106, 106') leading to a mating contact (9') that is fixed to the housing. The base (114) is formed by the deflectable end of the bimetal which is kinematically connected with the switch latch.
    Type: Grant
    Filed: March 5, 1990
    Date of Patent: February 5, 1991
    Assignee: Ellenberger & Poensgen GmbH
    Inventor: Josef Peter
  • Patent number: 4939495
    Abstract: A circuit breaker is shown having movable contacts carried by an operating member which moves between a circuit breaker contacts closed position and a circuit breaker contacts open position. An auxiliary switch has electrically conductive, flexible contact members adapted to engage an electrically conductive bridging shaft element carried by the operating member when the operating member is in one of its two positions to provide means for indicating the status of the circuit breaker.
    Type: Grant
    Filed: December 19, 1989
    Date of Patent: July 3, 1990
    Assignee: Texas Instruments Incorporated
    Inventors: Robert W. Peterson, Jacques Chammas
  • Patent number: 4937548
    Abstract: A circuit breaker characterized by its ability to qualify for controlling high electrical capacity in a concise configuration employing two sets of contacts separated by a dielectric barrier having anti-arcing features to minimize arcing in a minimal size circuit breaker. Control of the contact movement is through a pivoted actuator and over-center linkage in conjunction with a bell crank lever operating a spring mounted contact moving through a short radius.
    Type: Grant
    Filed: October 25, 1989
    Date of Patent: June 26, 1990
    Assignee: Mechanical Products, Inc.
    Inventor: Bruce C. Sdunek
  • Patent number: 4931762
    Abstract: A two pole breaker employs molded resinous parts including a base and support frame structure. Supported to a medial plane frame by a pin is a rocker handle having a linkage crank arm at each side of the medial plane and a rotatable latch lever having trip surfaces accessible to a bi-metallic overload actuator of each pole. A rocker member generally transverse to the normal position of the latch lever has a latch surface which cooperates with a latch keeper on the latch lever which is held engaged by a spring between the latch lever and the medial plane. The rocker has parallel side members, each supporting a switch actuator surface on each side of the medial plane frame. Identical linkage connections on each side of the medial plane connect the crank arms to the respective side pieces of the rocker.
    Type: Grant
    Filed: April 13, 1989
    Date of Patent: June 5, 1990
    Assignee: Heinemann Electric Company
    Inventor: Joseph Fierro
  • Patent number: 4922219
    Abstract: A circuit breaker having two subassemblies, connected via snap-lock means, which mesh together to provide manual operation with "trip free" response to overloads and no latch load on the bimetallic element.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: May 1, 1990
    Assignee: Mechanical Products, Inc.
    Inventors: Kenneth C. Bakhaus, Bruce C. Sdunek
  • Patent number: 4814738
    Abstract: An overload protection switch having a push button for manually initiating actuation of the overload protection switch and a movable contact member forming a switching path and having at least one fixed contact. There is a lockable trip mechanism actuated by the push button for controlling the movable contact member during actuation of the overload protection switch and a bimetal element which includes a locking lever pivotal into a locking position and pivotal into its unlocking position. A trip slide is articulated to the movable contact member and is charged in a turn-off direction. The trip slide is additionally supported in its path of movement by a housing groove at a counterslope fixed to the housing. An essentially wedge-shaped inner angle is formed to reduce friction forces at the locking lever and produce a lower tripping force at the bimetal element.
    Type: Grant
    Filed: October 2, 1987
    Date of Patent: March 21, 1989
    Assignee: Ellenberger & Poensgen GmbH
    Inventors: Fritz Krasser, Erhard Pietsch
  • Patent number: 4791075
    Abstract: A process for making hermetic, low cost pin grid array (PGA) semiconductor die packages. The process involves die bonding a semiconductor die or integrated circuit chip to a substrate having an interconnect or metallization pattern thereon. The die is electrically connected to the pattern and then the die and the inner bonds are hermetically sealed inside a cap that is smaller than the substrate so that the ends of the metallization pattern are exposed. The leads are then electrically connected, such as by solder or other technique to the exposed ends of the pattern.
    Type: Grant
    Filed: October 5, 1987
    Date of Patent: December 13, 1988
    Assignee: Motorola, Inc.
    Inventor: Paul T. Lin
  • Patent number: 4617545
    Abstract: A primary power circuit breaker adapted to be immersed in the dielectric fluid for a transformer, the breaker including an arc interrupting assembly for extinguishing the arc produced on load break; a trip free mechanism responsive to primary, secondary or primary-secondary differential current signals and thermally responsive to fluid temperature, and an externally operable reset assembly for closing the circuit breaker.
    Type: Grant
    Filed: March 20, 1985
    Date of Patent: October 14, 1986
    Assignee: RTE Corporation
    Inventor: Edwin A. Link
  • Patent number: 4400677
    Abstract: A circuit breaker has a thermally responsive bimetallic member of substantial resistance properties disposed in the breaker circuit so that it self-heats and moves to trip a mechanism to open the breaker circuit after a selected period of time when a selected overload current occurs in the circuit. Conductors are joined by a thermally separable bond and are disposed in the breaker circuit in selected heat transfer relation to the high resistance bimetallic member to be thermally separated after a selected delay period by heat transferred to the bond from the bimetallic means, thereby to open the circuit in the event that movement of the thermally responsive member is ineffective to open the circuit. Spring means preferably bias the conductors to separate to assure circuit opening when thermal separation of the noted bond occurs. Preferably one of the conductors has a part of reduced cross-section adapted to rupture and open the circuit under alternate circuit conditions.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: August 23, 1983
    Assignee: Texas Instruments Incorporated
    Inventors: Carleton M. Cobb, III, Roland G. Morin, Hans G. Hirsbrunner
  • Patent number: 4338586
    Abstract: A circuit protector comprising a case and a rocker or handle movable between "on" and "off" positions. A spring has one leg biased against the case and the other leg biased against the rocker for biasing the rocker to the "off" position. Within the case is a stationary contact and a movable contact carried by a movable contact blade. The rocker includes an extension which carries a pivotal latch lever and a slidable latch. The latch lever has a detent for restraining movement of the slidable latch. Further, the slidable latch includes a cam stop engaging a raised portion of the movable contact blade to keep the contacts engaged. A bimetal, on predetermined overload heating, engages the latch lever and pivots it away from the slidable latch, whereupon the detent is moved out of engagement with the slidable latch permitting the slidable latch to move upwardly under pressure of the movable contact blade and also permitting the rocker to be pivoted by the spring to the contacts "off" position.
    Type: Grant
    Filed: September 3, 1980
    Date of Patent: July 6, 1982
    Assignee: Heinemann Electric Company
    Inventor: William F. Scanlon
  • Patent number: 4167720
    Abstract: A circuit breaker composed of a contact spring fixed at one end, carrying a movable contact at its free end and biassed to urge the movable contact away from an associated fixed contact, a switching rocker pivotally mounted to selectively move the spring into a contact closing position, and a release device arranged to move the spring into the contact opening position independently of the position of the rocker, is further provided with a latching lever which extends approximately parallel to the contact spring, is mounted to be pivotal in a direction parallel to the direction of movement of the spring and of the rocker, and is operatively connected between the spring, the rocker and the release device.
    Type: Grant
    Filed: May 8, 1978
    Date of Patent: September 11, 1979
    Assignee: Ellenberger & Poensgen GmbH
    Inventor: Fritz Krasser
  • Patent number: 4148002
    Abstract: An electric on-off switch which may optionally include a thermal trip including a bimetal strip.The switch comprises a housing having therein a stationary contact which is engageable by a movable contact carried by a contact spring. The spring is actuated by a mechanism including a tiltable operating lever which carries a release lever. An operating cam is provided on the release lever for depressing the contact spring and causing the movable contact to engage the stationary contact.When the switch includes a directly or indirectly heated bimetal strip, the release lever is pivotally carried by the operating lever which carries a torsion spring. The torsion spring biases the release lever into contact with a set screw secured to the bimetal strip and also urges the cam into contact with the contact spring. A pivotally mounted, elongate lever is preferably disposed between the set screw and the release lever.
    Type: Grant
    Filed: November 30, 1976
    Date of Patent: April 3, 1979
    Assignee: Ellenberger & Poensgen GmbH
    Inventor: Fritz Krasser
  • Patent number: 4048608
    Abstract: A double break, trip free circuit breaker is disclosed which is compensated for variations in ambient temperature. A biased rocker arm carries a contact bridging bar at one end and engages a heater/bimetal or electromagnetic back at the other. A segmented reset plunger allows for a manual trip capability in addition to circuit breaking even when the plunger is held in the reset position. High current handling capabilities result from the separating of the heater/bimetal circuit from the main current flow path.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: September 13, 1977
    Assignee: Aiken Industries, Inc.
    Inventors: William P. Riendeau, Robert R. Blevins, Joseph L. Abell