With Heat Absorption, Conducting Or Storage Means Patents (Class 337/166)
  • Patent number: 10283306
    Abstract: A safety fuse includes a housing, a first contact blade having a protruding portion protruding from the housing along a first direction, a second contact blade having a protruding portion protruding from the housing, and a fusion section enclosed in the housing and connecting the first contact blade and the second contact blade. The protruding portion of the first contact blade includes two lateral edges extending in the first direction and a linear bend arranged on one of the lateral edges. The bend extends in a second direction perpendicular to the first direction.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: May 7, 2019
    Assignee: LISA DRAEXLMAIER GMBH
    Inventor: Peter F├╝ssl
  • Patent number: 10147573
    Abstract: A reflowable thermal fuse comprises a conduction element with first and second elastic portions, a sensor, a restraining element, a heating element and mounting pads. The first elastic portion is adapted to apply force on the conduction element in an activated state of the thermal fuse. The sensor is in mechanical communication with the first elastic portion of the conduction element. The restraining element is adapted to secure the second elastic portion of the conduction element and thereby prevent the second elastic portion from applying force on the conduction element in an installation state of the thermal fuse. Application of an activating current through the heating element causes heat generated and transferred to the restraining element and makes the restraining element to lose resilience, thereby releasing the second elastic portion and placing the thermal fuse in the activated state.
    Type: Grant
    Filed: July 28, 2017
    Date of Patent: December 4, 2018
    Assignee: POLYTRONICS TECHNOLOGY CORP.
    Inventors: Tsungmin Su, Tongcheng Tsai, David Shau Chew Wang
  • Patent number: 10029655
    Abstract: A wheel and lug nut cleaning device providing a single tool for cleaning behind and between spokes of a wheel rim, the lug nuts, and rim cavities around the lug nuts by including a static spine having an exterior end, an angled front portion proximal thereto, an interior end, and a rear portion. A shape-retaining non-abrasive core encircles most of the spine. A sheath, removably encompassing and conforming to the core, has a tapered forward end, a rearward end, a central opening in the rearward end, and semi-obround microfiber flanges extended from the core. A lug nut and rim cavity-cleaning body, removably disposed on the interior end, has a substantially disc-shaped central base with an attachment end engageable to the central opening and flexible cleaning flanges radially disposed thereon and a cover removably disposed thereon, including a central ring and extensions radially disposed therefrom to cover the cleaning flanges.
    Type: Grant
    Filed: August 5, 2016
    Date of Patent: July 24, 2018
    Assignee: Black Tie Brands, LLC
    Inventors: Scott Voelker, Jonathan Batchelor, Jr.
  • Patent number: 9827629
    Abstract: Some embodiments of the present invention are generally directed to testing connections of a memory device to a circuit board or other device. In one embodiment, a memory device that is configured to facilitate continuity testing between the device and a printed circuit board or other device is disclosed. The memory device includes a substrate and two connection pads that are electrically coupled to one another via a test path. A system and method for testing the connections between a memory device and a circuit board or other device are also disclosed, as are additional techniques for detecting excess temperature and enabling special functionalities using multi-stage connection pads.
    Type: Grant
    Filed: November 6, 2013
    Date of Patent: November 28, 2017
    Assignee: Micron Technology, Inc.
    Inventor: Thomas Kinsley
  • Patent number: 9336978
    Abstract: A protective device including a substrate, a conductive section and a bridge element is provided. The conductive section is supported by the substrate, wherein the conductive section comprises a metal element electrically connected between first and second electrodes. The metal element serves as a sacrificial structure having a melting point lower than that of the first and second electrodes. The bridge element spans across the metal element in a direction across direction of current flow in the metal element, wherein the bridge element facilitates breaking of the metal element upon melting.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: May 10, 2016
    Assignee: CYNTEC CO., LTD.
    Inventors: Chung-Hsiung Wang, Hung-Ming Lin, Wen-Shiang Luo, Chun-Tiao Liu, Kuo-Shu Chen
  • Patent number: 8179224
    Abstract: The overcurrent protection structure according to the present invention mainly comprises a fusible fuse structure unit disposed in a coating, and the both ends of the fusible fuse structure unit extend outwardly beyond the coating and form a first electrode and a second electrode. In the manufacturing process, the gas-assisted injection molding process enables at least one space for accommodating gas disposed between the fusible fuse structure unit and the coating such that the heat generated by the electrically energized the fusible fuse structure unit will not dissipate through the heat conduction of the coating in order to ensure that it will blow at high temperature when reaching a specific current or a specific temperature and the circuit protection effect.
    Type: Grant
    Filed: April 17, 2008
    Date of Patent: May 15, 2012
    Inventor: Chun-Chang Yen
  • Patent number: 6801433
    Abstract: An apparatus for cooling electrical protective devices comprises an electrical protective device mounted to at least one electrical terminal, wherein the electrical terminals are cooled to indirectly cool the electrical protective devices. A pressurized coolant source passes a coolant fluid through coolant passages attached to the electrical terminals, thereby cooling the electrical terminals. The cooled electrical terminals maintain the temperature of the electrical protection device within an appropriate operating temperature range. This cooling method may be used to increase the fuse power rating of a fuse array while maintaining electrical coordination between the fuses in the fuse array and electrical devices protected by the fuse array.
    Type: Grant
    Filed: January 9, 2002
    Date of Patent: October 5, 2004
    Assignee: General Electric Company
    Inventors: Brian Eric Lindholm, Paul Stephen Pate, Allen Michael Ritter
  • Patent number: 6510047
    Abstract: A conductive heat sink is electrically interposed between a fuse and a switching apparatus within a watertight case of a network protector. The heat sink is advantageously configured to conduct current between the switching apparatus and the fuse. During operation, the skin effect causes the electricity conducted by the heat sink to flow primarily through the outer regions of the heat sink, thereby resulting in the generation of heat at the outer regions of the heat sink due to electrical resistance. The heat sink includes a core from which a plurality of fins extend. The fins conduct and convect heat away from the outer regions of the heat sink, which reduces the temperature thereof and correspondingly increases the conductivity of the outer regions of the heat sink.
    Type: Grant
    Filed: March 5, 2001
    Date of Patent: January 21, 2003
    Assignee: Eaton Corporation
    Inventors: Steven E. Meiners, Douglas M. Brandt
  • Patent number: 6448882
    Abstract: A large current fuse 21 which comprises a metallic fusing member 22 and a resin housing 23, the metallic fusing member 22 including a first conductive plate 25, a second conductive plate 26, and a fusing part 27, the resin housing 23 having an open space 49 through which the fusing part is exposed, the first conductive plate 25 being provided at its side face with a first projecting piece 31 projecting by way of an edge of the open space 49, the second conductive plate 26 being provided at its side face with the second projecting piece 37 projecting by way of the edge of the open space 49, a width D1 of the first projecting piece 31 in a direction perpendicular to its projecting direction and a width D2 of the second projecting piece 37 in a direction perpendicular to its projecting direction being of a fixed size, irrespective of the rated current. The large current fuse which does not require the respective molding dies exclusively according to the rated currents is provided.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: September 10, 2002
    Assignee: Yazaki Corporation
    Inventors: Shigemitsu Inaba, Norio Matsumura, Mitsuhiko Totsuka, Yasuko Hibayashi
  • Publication number: 20020113684
    Abstract: A miniature fuse of surface mount type having a stable pre-arcing time-current characteristic and a strong time lag characteristic, being easy to produce, and providing a constant pre-arcing time is provided. The main body is of rectangular ceramic construction of split type. A fusible member 60 (Ag:Cu:An=>50%:>20%>17%:>5% (weight ratio) wound around the ceramic rod 58 (A12O3:MgO:BeO=>96%:>3%:>3%:<1% (weight ratio) is rested on the recessed portion 62 of the lower ceramic casing 54. The end portion 76 of the fusible member 60 is engaged with the side surface of the casing. The upper ceramic casing 52 is laid on the lower casing, so that the cap 56 is fit onto the opposite ends of the main body. The end portion 76 of the fusible member 60 and the cap 56 are connected by welding. At the time of welding, projection 74 to be fit in the recessed portion 72 provided at the main body is formed at the cap 56, so that the cap 56 can be fixed to the main body.
    Type: Application
    Filed: February 11, 2002
    Publication date: August 22, 2002
    Inventors: Hiroo Arikawa, Koh Ishimura, Seiji Norisue
  • Patent number: 6294978
    Abstract: A high-current fuse for vehicles is provided. This high-current fuse includes a conductive plate having a fuse and terminal connecting portions on both ends, and a resin case into which the conductive plate is insert-molded. A heat radiating portion for releasing heat generated from the fuse and the conductive plate when energized is provided on the outer surface of the resin case. The heat radiating portion is made up of a plurality of thin plates arranged on the resin case at regular intervals. The thin plates are situated in parallel with the energizing direction so as to strengthen the resin case. To keep the fuse away from both ends of the conductive plate, a pair of assisting plates facing to each other are formed in the middle of the conductive plate, and the fuse is disposed between the assisting plates. The fuse between the assisting plates is in the direction perpendicular to the energizing direction of the conductive plate.
    Type: Grant
    Filed: March 15, 1999
    Date of Patent: September 25, 2001
    Assignee: Yazaki Corporation
    Inventors: Takayoshi Endo, Norio Matsumura, Shigemitsu Inaba, Atsushi Hikage, Shinya Onoda
  • Patent number: 6237698
    Abstract: A thermal control circuit (49) for inexpensively protecting the power interface of cordless and dual-mode powered devices (12), such as hand-held power tools and appliances. The powered device includes a motor (11) that is operable in a preselected voltage range. A switch assembly (110) controls the flow of electrical energy to the motor (11). A power module (14, 16) is configured to supply electric power and to mate with the low-voltage DC power tool (12). The power module (14, 16) is adapted to provide a DC voltage in the preselected voltage range suitable for powering the low-voltage DC power tool (12). A case (91) for the power tool (12) has a pre-defined envelope for electrically and mechanically mating with the power module (14, 16). A power interface that includes at least two terminals, electrically couples the power module (14, 16) to the motor (11). The thermal control circuit (49) protects the power interface from damage caused by an overtemperature level.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: May 29, 2001
    Assignee: Black & Decker Inc.
    Inventors: David Carrier, Samuel G. Woods, Chris Yahnker, Zollie W. Privett
  • Patent number: 6144283
    Abstract: A temperature detectable current fuse comprises a temperature detecting fuse having a fusible portion, a current fuse having a fusible portion and a table portion provided at the fusible portion thereof, on which the fusible portion of the temperature detecting fuse is mounted, and a housing having a chamber into which the temperature detecting fuse and the current fuse are inserted through an opening of the chamber.
    Type: Grant
    Filed: May 14, 1999
    Date of Patent: November 7, 2000
    Assignee: Yazaki Corporation
    Inventor: Norio Matsumura
  • Patent number: 6011458
    Abstract: In large-current fuse unit, a large-current fuse has a pair of terminals interconnected by a fuse element, and a housing receives the large-current fuse therein, and a temperature fuse is mounted within the housing, and is disposed in close proximity to the fuse element. The temperature fuse is melted by heat generated from the fuse element.
    Type: Grant
    Filed: March 16, 1999
    Date of Patent: January 4, 2000
    Assignee: Yazaki Corporation
    Inventors: Takayoshi Endo, Goro Nakamura
  • Patent number: 5986534
    Abstract: The present invention relates to a fuse arrangement, which is particularly suited to high voltage applications, but also has applications across a broad voltage range. The fuse arrangement comprises a fuse link arranged to be connected in a current carrying circuit and a parallel-connected resistor. On occurrence of a fault, conditioning the current carrying circuit, the fuse link is arranged to generate relatively high voltage such that current is commutated to the resistor and electrical energy associated with the fault current is absorbed by the resistor. The resistor element is preferably a varistor and, for high voltage applications, a fuse link preferably comprises a deeply confined expulsion fuse. Because electrical energy flowing in the circuit is diverted to the resistance element on occurrence of a fault condition, the current carrying circuit is thus protected from damage.
    Type: Grant
    Filed: March 23, 1996
    Date of Patent: November 16, 1999
    Assignee: The University of Sydney
    Inventors: Anthony D. Stokes, Andrew Wolny
  • Patent number: 5963122
    Abstract: In large-current fuse unit, a large-current fuse has a pair of terminals interconnected by a fuse element, and a housing receives the large-current fuse therein, and a temperature fuse is mounted within the housing, and is disposed in close proximity to the fuse element. The temperature fuse is melted by heat generated from the fuse element.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: October 5, 1999
    Assignee: Yazaki Corporation
    Inventors: Takayoshi Endo, Goro Nakamura
  • Patent number: 5927060
    Abstract: A composite longitudinally balanced electrically conductive yarn has a textile fiber core yarn wrapped with a minimum of two, and a maximum four, filaments. One to four of the filaments are metal filaments with the remainder being synthetic filaments. Each metal filament has an equivalent diameter of between 20 and 80 microns, and a wrap frequency of between 200 and 600 turns per meter. At least one of the metal filaments is wrapped in one direction, and at least one of the remaining filaments is wrapped in the opposite direction. The composite yarns of this invention is capable of elongation to accommodate tensile stresses under use, without experiencing a change in conductivity.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: July 27, 1999
    Assignee: N.V. Bekaert S.A.
    Inventor: Douglas L. Watson
  • Patent number: 5900798
    Abstract: In the metal piece 32 which diffuses into the fuse element so that an alloy layer is generated, there is formed an expanding slot 30, which is inserted and pressured in the fusing portion 25b of the fusible body 25 which forms the fuse element. Due to the foregoing, the metallic mass 32 of low fusing point is fixed to the fusible body 25 while it surrounds the circumferential surface of the fusing portion 25b.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: May 4, 1999
    Assignee: Yazaki Corporation
    Inventors: Hisashi Hanazaki, Kenji Muramatsu, Mitsuhiko Totsuka, Toshiharu Kudo
  • Patent number: 5898358
    Abstract: Fuse comprising ceramic oxide fibers and vermiculite particulate.
    Type: Grant
    Filed: July 25, 1997
    Date of Patent: April 27, 1999
    Assignee: Minnesota Mining & Manufacturing
    Inventors: Thomas L. Tompkins, Margaret M. Vogel-Martin
  • Patent number: 5821847
    Abstract: To effectively prevent the efflux at the time of depositing a fusible metal, a fuse includes a clamping piece in the longitudinal middle portion of a fusible element, a fusible metal having a low melting point is clamped by and deposited on the clamping piece, in which the fusible metal is deposited on the fusible element while parts of the fusible metal exposed when fusible metal is clamped with the clamping piece, are covered with enclosing walls that are formed by bending the fusible element on both sides of the clamped part to the sides of the fusible metal.
    Type: Grant
    Filed: March 27, 1997
    Date of Patent: October 13, 1998
    Assignee: Yazaki Corporation
    Inventor: Mitsuhiko Totsuka
  • Patent number: 5790007
    Abstract: A board fuse includes an insulating board having a through-hole window in the middle of the insulating board and fusible elements laid over the insulating board. Further, the fusible elements are continuous metal wires substantially equal in cross section. The fusible elements are uniform and accurate in cross section and accurate in current capacity. The fusible elements extend across the window in such a manner that, at the window, they are not in contact with the insulating board. Hence, when heat is generated in any one of the fusible elements by electric current, the heat generated at the window is not absorbed by the insulating board and is increased as required, thus blowing the fusible element accurately. Accordingly, the board fuse is free from the difficulties caused by the heat generation, that is, the production of a bad smell, at worst the production of white smoke.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: August 4, 1998
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventor: Jun Yasukuni
  • Patent number: 5745024
    Abstract: For providing a fuse element for slow-blow fuses which uses no separate endothermic member, a fuse element for slow-blow fuses in which wings are formed on both sides of slender element portions connecting top ends of a pair of female terminals by way of narrow and short bridges by punching out of a single electrically conductive sheet.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: April 28, 1998
    Assignee: Pacific Engineering Co., Ltd.
    Inventors: Manabu Ohta, Akihiko Shimizu
  • Patent number: 5661448
    Abstract: A chain of fuse-links is made from an electrically conductive metal plate. Each fuse-link P4. has an arc-shaped fusing portion 1 and a couple of terminal portions 4, 4 constituting a pair of wing-shaped members connected to each end of the arc-shaped fusing portion 1. A carrier strap 9 has a plurality of vertical connecting pieces 8 each positioned at fixed intervals for retaining the plurality of fuse-links P4. Each of a plurality of interconnection pieces 7 is connected to the vertical connecting piece 8 at one end and connected to a side edge of specific side one of the couple of terminal portions at the other end. The other end of the interconnection piece 7' is bent so that the end edges of the couple of terminal portions 4, 4 rise above the carrier strap 9.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: August 26, 1997
    Assignee: Yazaki Corporation
    Inventors: Mitsuhiko Totsuka, Hisashi Hanazaki
  • Patent number: 5631619
    Abstract: A female fuse having a one piece fuse link and thermal mass injection molded around a multifinger fuse clips. The fuse link, thermal mass, and fuse clip are enclosed in an insulating housing. The resulting fuse is smaller in size and operates at a cooler temperature than other fuses.
    Type: Grant
    Filed: March 20, 1995
    Date of Patent: May 20, 1997
    Assignee: Cooper Industries, Inc.
    Inventor: Terence J. Evans
  • Patent number: 5546066
    Abstract: The present invention provides a delayed-fusion fuse by which its predetermined durability can be reliably ensured, and its stable pre-arcing time-current characteristics can be obtained, even when a current exceeding the steady-state current such as a motor lock current frequently flows in the fuse. The delayed-fusion fuse includes a pair of electric connecting sections formed on both sides of a fusible section having a narrow fusing portion made of an electrically conductive metal. Also, the delayed-fusion fuse includes a metallic chip made of low fusing point metal for absorbing heat generated in the fusible section, and a covering and adhering section for holding the metallic chip on the fusible section. A thin metallic layer forms a solid solution with the low fusing point metal, where the solid solution requires an energy of formation which is higher than that of the formation of a solid solution made of the electrically conductive metal and the low fusing point metal.
    Type: Grant
    Filed: August 25, 1994
    Date of Patent: August 13, 1996
    Assignee: Yazaki Corporation
    Inventors: Hiroki Kondo, Mitsuhiko Totsuka, Toshiharu Kudo, Hisashi Hanazaki
  • Patent number: 5528213
    Abstract: An embracing portion is formed on a fusible body of metal, and a chip of low-melting metal is embraced by this embracing portion, and a constricted portion of a small cross-sectional area is formed at the fusible body, and a radiating plate is provided in the vicinity of the constricted portion.
    Type: Grant
    Filed: June 22, 1994
    Date of Patent: June 18, 1996
    Assignee: Yazaki Corporation
    Inventors: Hiroki Kondo, Shigemitsu Inaba, Mitsuhiko Totsuka, Toshiharu Kudo
  • Patent number: 5345210
    Abstract: A time delay fuse and various subassembly components for that time delay fuse. The fuse includes a housing made of an insulating material. The housing encloses a short-circuit fusible element, preferably a copper or copper alloy strip having a plurality of slots. The housing also encloses one or more rigid meltable fusible elements, preferably a plurality of solder bars. A body of resilient, compressible insulating material has at least one passageway through which each of the time delay fusible elements extends. When the rigid meltable fusible elements melt, the circuit through the fuse opens. In addition, the passageway which surrounded the rigid meltable fusible elements collapses upon its melting. This provides protection against "arc-back.
    Type: Grant
    Filed: July 19, 1993
    Date of Patent: September 6, 1994
    Assignee: Littelfuse, Inc.
    Inventors: Robert G. Swensen, Joseph W. Kowalik
  • Patent number: 5187463
    Abstract: A time delay fuse including a fusible element for short circuit protection and a spring-loaded plunger partially contained in an enclosure and restrained by a solder mass for time-delayed overcurrent protection, the fusible element including a segment extending along the side of the enclosure in the space between the enclosure and the fuse casing.
    Type: Grant
    Filed: February 11, 1992
    Date of Patent: February 16, 1993
    Assignee: Gould, Inc.
    Inventors: Gary W. Di Troia, Paul M. Romani
  • Patent number: 5150093
    Abstract: A time-delay fuse having a fuse element with a series of weak spots surrounded by a loose sand filler. The fuse element is connected to a trigger mechanism by solder or other meltable alloy. The trigger section provides overload protection and the fuse element provides short circuit protection resulting in a time-delay fuse which can be used in places where there are size restrictions.
    Type: Grant
    Filed: June 7, 1991
    Date of Patent: September 22, 1992
    Assignee: Cooper Industries, Inc.
    Inventor: Leon Gurevich
  • Patent number: 5084691
    Abstract: A controllable fuse (10; 40; 50; 60; 80) has a pair of isolated conductor pads (26, 27), a solder connection (32; 41; 51) connected to the pads and providing a circuit connection therebetween, and at least one heater (14; 70, 75) to produce heat in response to an electrical signal. When sufficient heat is provided, the solder connection will desolder and disconnect the circuit connection between the conductor pads (26, 27). Major features are that the conductor pads and the heater are provided on a planar surface(s) (19, 25) as planar films and that redundancy for the fuse can be implemented by providing more than one heater (70, 75). A preferred manufacturing method for the fuse is disclosed which utilizes a solder retaining structure. Several fuse configurations are illustrated.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: January 28, 1992
    Assignee: Motorola, Inc.
    Inventors: Theodore V. Lester, Jerry D. Meyerhoff, Loren E. Saar
  • Patent number: 4994779
    Abstract: A time-delay fuse 10 having a circular fusible element 22 with stress relief section 24. The cylindrical fuse element 22 is connected to a trigger mechanism 30 by solder or other meltable alloy. The trigger section 30 provides overload protection and the circular fusible element provides short circuit protection resulting in a time-delay fuse which can be used in places where there are size restrictions.
    Type: Grant
    Filed: August 21, 1989
    Date of Patent: February 19, 1991
    Assignee: Cooper Industries, Inc.
    Inventor: Robert S. Douglass
  • Patent number: 4992770
    Abstract: The dual element time delay fuse includes a circuit overload trigger which opens the fuse in response to long term medium circuit overloads, and a short circuit strip disposed in a solid matrix filler for opening the fuse in response to the presence of a short circuit in the circuit.
    Type: Grant
    Filed: September 11, 1989
    Date of Patent: February 12, 1991
    Assignee: Cooper Industries, Inc.
    Inventors: Keith A. Spalding, Fred Levko, Donald Johnston, John Ackermann, Arlie Ehlman
  • Patent number: 4972169
    Abstract: A spiral wound sand fuse has a non-reactive fiber core permitting use of the fuse to interrupt high fault currents in high voltage circuits.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: November 20, 1990
    Assignee: Cooper Industries, Inc.
    Inventor: Varinder K. Kalra
  • Patent number: 4839625
    Abstract: A fuse comprising a body (20) encapsulating a fuse element (22), said body (20) including a baseplate (16) formed from a material having good thermal conductivity; a pair of elongate terminals (12) being connected at one end to the baseplate (16) through the intermediary of a layer of electrically insulating, heat conducting material (26) so as to extend away therefrom and project from said body (20); the fuse element (22) being provided between the terminals (12) within the body and being surrounded by an arc quenching material (24).
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: June 13, 1989
    Assignee: Brush Fusegear Limited
    Inventors: Percy G. Newbery, Nigel P. M. Nurse
  • Patent number: 4751490
    Abstract: A fuse terminal comprising a fusible conductor formed of a Cu alloy having a conductivity of 20--less than 60% (IACS), the fusible conductor being formed with a narrow fuse portion at an intermediate position, and a pair of connection terminals formed at both ends of the fusible conductor and arranged in opposed relation with each other by bending the fusible conductor at both end portions thereof in a gantry fashion. The terminal is characterized by a surface area of the fusible conductor which is 1/8-1/2 of that of the connection terminals.
    Type: Grant
    Filed: March 23, 1987
    Date of Patent: June 14, 1988
    Assignee: Yazaki Corporation
    Inventor: Yuji Hatagishi
  • Patent number: 4680567
    Abstract: A time delay fuse (10) includes a tubular housing (12) of insulative material with first and second open ends (14, 16). First and second metallic or electrically conductive ferrules (18, 20) are mounted on the first and second ends, respectively, of the tubular housing. A core (24) is positioned within the tubular housing (12) and affixed to the ferrules (18, 20) by electrically conductive material (26) such as solder. At least one short inner wire (28) extends along the core and is electrically and mechanically connected to the solder (26). A second wire (34) longer than the first wire (28) is spirally wound around the core (24) and the first inner wire (28). The second wire (34) includes first and second ends (36, 38) mechanically and electrically connected to the conductive material (26) such that the first and second wires are electrically parallel.
    Type: Grant
    Filed: February 10, 1986
    Date of Patent: July 14, 1987
    Assignee: Cooper Industries, Inc.
    Inventor: Carl H. Edwards
  • Patent number: 4651119
    Abstract: An electric fuse is provided with heat dam elements interconnecting the fusible element and the fuse end terminals, which are provided with one or more raised ribs integrally formed therein. The heat dams include a plurality of planar sections and interconnecting bends to which the ribs impart a high degree of stiffness and dimensional stability.
    Type: Grant
    Filed: June 28, 1985
    Date of Patent: March 17, 1987
    Assignee: Gould Inc.
    Inventors: Richard A. Belcher, Robert J. Panaro
  • Patent number: 4646052
    Abstract: A slow blow fuse has a fuse element section and a pair of electrical terminals integrally formed with the opposite ends of the fuse element section. The fuse element section and the electrical terminals are formed of a high melting point metal and heat accumulators formed of aluminum are secured to the opposite ends of the fuse element section in heat transfer relationship therewith.
    Type: Grant
    Filed: December 24, 1985
    Date of Patent: February 24, 1987
    Assignee: Sumitomo Wiring System, Ltd.
    Inventors: Katsumi Matsunaga, Yoshitsugu Tsuji
  • Patent number: 4635023
    Abstract: A fuse assembly has a fuse link extending suspended in a housing between a pair of terminal extensions, which the fuse link interconnects electrically. A fuse blowing current-reducing material like tin is carried on the fuse link and spaced from and on opposite sides of the hot spot of the fuse link where the fuse is expected to blow.
    Type: Grant
    Filed: May 22, 1985
    Date of Patent: January 6, 1987
    Assignee: Littelfuse, Inc.
    Inventor: Seibang Oh
  • Patent number: 4626818
    Abstract: An energy sensitive fusible device fabricated by thick film techniques in which a fuse element is sandwiched between two glazes on a substrate, for use in programming thick film networks.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: December 2, 1986
    Assignee: Centralab, Inc.
    Inventor: John L. Hilgers
  • Patent number: 4599543
    Abstract: A high pressure sodium vapor lamp having a time fuse device effective for predeterminedly establishing the anticipated life of the high pressure lamp is disclosed. Also disclosed are various embodiments of the time fuse device.
    Type: Grant
    Filed: January 27, 1986
    Date of Patent: July 8, 1986
    Assignee: General Electric Company
    Inventor: Jack M. Strok
  • Patent number: 4570147
    Abstract: A fuse comprising a casing, a fusible element disposed within the casing and a member made of ceramics mounted to the fusible element, the fusible portion of the fusible element being situated within a recess formed in the member.
    Type: Grant
    Filed: October 10, 1984
    Date of Patent: February 11, 1986
    Assignee: Pacific Engineering Company, Ltd.
    Inventor: Masashi Ebi
  • Patent number: 4560971
    Abstract: A slow blow fuse of the shunt type includes a pair of spaced terminals between which is connected and suspended a fuse wire assembly including a core of insulating material having at least a pair of fuse filaments upon the same, the outer of which is preferably an untinned spirally wound filament wrapped a number of times around one and more preferably at least two straight filaments, only one of which is tin plated, extending axially along the core. The uncoated spirally wound filament thus makes repeated physical and axial spaced electrical contact with the tinned filament. There are thus at least two fuse filaments in electrical parallel relation at a number of different locations therealong, each sharing a layer of tin coating.
    Type: Grant
    Filed: September 10, 1984
    Date of Patent: December 24, 1985
    Assignee: Littelfuse, Inc.
    Inventor: Seibang Oh
  • Patent number: 4517544
    Abstract: A time delay fuse includes a tubular housing of insulative material with first and second open ends. First and second metallic or electrically conductive ferrules are mounted on the first and second ends, respectively, of the tubular housing. A core is positioned within the tubular housing and affixed to the ferrules by electrically conductive material such as solder. At least one short inner wire extends along the core and is electrically and mechanically connected to the solder. A second wire, longer than the first wire, is spirally wound around the core and the first inner wire. The second wire includes first and second ends mechanically and electrically connected to the conductive material such that the first and second wires are electrically parallel.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: May 14, 1985
    Assignee: McGraw-Edison Company
    Inventor: Vernon R. Spaunhorst
  • Patent number: 4506310
    Abstract: A fused station protector is disclosed wherein the fuse links have precisely controlled fusing characteristics. A shrink away foam element (28) encloses a portion of the fuse link (26) to provide a potential hot spot for slight current excesses. The remainder of the fuse link is in contact with arc quenching material (27) for extinguishing potential power arcs. Thus, the protector provides a precise fusing characteristic for slight current excesses and arc quenching capability for severe current excesses.
    Type: Grant
    Filed: March 19, 1984
    Date of Patent: March 19, 1985
    Assignee: AT&T Bell Laboratories
    Inventor: Alfred O. Schwarz
  • Patent number: 4503415
    Abstract: There is disclosed an encapsulated fuse link whereby a lower melting point metal such as tin is deposited between two reduced cross sectional areas of a higher melting point base material such as copper or silver which forms the major surface area of the link. The area upon which the lower melting point metal is deposited is encapsulated by means of nonconductive material such as a high temperature plastic tube which is secured to the major surface of the link by some means such as staples at either end. The structure prevents the low melting point metal from migrating or traveling down the fuse link during operation which would undesirably tend to alter the characteristics of the fuse.
    Type: Grant
    Filed: June 6, 1983
    Date of Patent: March 5, 1985
    Assignee: Commercial Enclosed Fuse Co. of NJ
    Inventors: William J. Rooney, Francis J. Rooney
  • Patent number: 4494104
    Abstract: A fuse for responding to external temperatures to interrupt an electrical circuit, for example for interrupting a telephone battery feed in response to the temperature of a battery feed resistor, comprises a substrate carrying a pair of electrodes defining a gap between them. A fuse link, for example a gold strip, extends across the gap to interconnect the electrodes electrically. A film of solder overlies the fuse link and overlaps at least partly at least one of the electrodes. The fuse link is soluble in the molten solder so when the temperature of the solder paste exceeds its melting point, it melts, dissolves the fuse link, and retreats from the gap to sever the electrical connection between the electrodes.The fuse and a resistor whose temperature is to be detected, may be provided on a single substrate.
    Type: Grant
    Filed: July 18, 1983
    Date of Patent: January 15, 1985
    Assignee: Northern Telecom Limited
    Inventor: Edward S. B. Holmes
  • Patent number: 4445106
    Abstract: A spiral wound fuse body comprises a core of insulating material formed by a limp, dead yarn made of twisted together initially sizing-coated strands of fine ceramic filaments, where the sizing was subsequently removed so that there is no sizing to leave a conductive residue under fuse blowing conditions. Such a fuse body is mass produced by spiral winding fuse wire upon a continuous length of said yarn unwinding from a spool upon which the yarn was wound when the sizing was removed. The resulting self-supporting body can be wound into rolls and subsequently unwound so that individual fuse bodies can be severed from the end of the unwinding roll of fuse body-forming material.
    Type: Grant
    Filed: October 7, 1980
    Date of Patent: April 24, 1984
    Assignee: Littelfuse, Inc.
    Inventor: Nitin Shah
  • Patent number: 4430633
    Abstract: A fuse comprising a casing, a fusible element disposed within the casing and a member made of ceramics mounted to the fusible element, the fusible portion of the fusible element being situated within a recess formed in the member.
    Type: Grant
    Filed: April 16, 1981
    Date of Patent: February 7, 1984
    Assignee: Pacific Engineering Co., Ltd.
    Inventor: Masashi Ebi
  • Patent number: 4414526
    Abstract: An electric low-voltage current-limiting fuse completely or substantially complying with the Underwriters Laboratories Inc. Standard Class R fuses. The current carrying part of the fuse comprises a fusible element having serially arranged perforations. This part may be of silver or of copper. The current carrying part of the fuses further comprises tabs of copper bent over the rims of the casing and conductively interconnecting the ends of the fusible element with the terminal caps of the fuse. The fusible element is provided with an M-effect metal to limit the temperature rise of the fusible element and of the casing. The tabs are considerably thicker than the fusible element. If the fusible element is of silver the thickness of the tabs of copper is larger than the thickness required to fully compensate for their higher resistivity.
    Type: Grant
    Filed: November 16, 1981
    Date of Patent: November 8, 1983
    Assignee: Gould Inc.
    Inventor: Robert J. Panaro