US2966649A - Fuse resistor - Google Patents

Fuse resistor Download PDF

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Publication number
US2966649A
US2966649A US771533A US77153358A US2966649A US 2966649 A US2966649 A US 2966649A US 771533 A US771533 A US 771533A US 77153358 A US77153358 A US 77153358A US 2966649 A US2966649 A US 2966649A
Authority
US
United States
Prior art keywords
resistor
metal
fuse resistor
terminal
band
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US771533A
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English (en)
Inventor
Haynman Alexandre
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Resistance Co
Original Assignee
International Resistance Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL121181D priority Critical patent/NL121181C/xx
Priority to NL244986D priority patent/NL244986A/xx
Application filed by International Resistance Co filed Critical International Resistance Co
Priority to US771533A priority patent/US2966649A/en
Priority to FR792041A priority patent/FR1221530A/fr
Priority to DEI16437A priority patent/DE1102249B/de
Application granted granted Critical
Publication of US2966649A publication Critical patent/US2966649A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/04—Fuses, i.e. expendable parts of the protective device, e.g. cartridges
    • H01H85/041—Fuses, i.e. expendable parts of the protective device, e.g. cartridges characterised by the type
    • H01H85/048—Fuse resistors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H85/00—Protective devices in which the current flows through a part of fusible material and this current is interrupted by displacement of the fusible material when this current becomes excessive
    • H01H85/02—Details
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
    • H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts

Definitions

  • This invention relates to the construction of a fuse resistor, and more particularly, to an improved construction for a resistor having a fusible connection between the resistor element and a terminal therefor.
  • resistors heretofore used for this purpose comprise either a wire wound resistor element which is constructed to burn out at the predetermined temperature or a resistor including a fusible link which melts at the predetermined temperature to open the resistor.
  • fuse resistors heretofore available have the disadvantages that they are complicated in construction so that they are difiicult and expensive to manufacture, and, more importantly, once they open up they cannot be reused but must be replaced with another resistor.
  • Figure l is a longitudinal elevational view of one embodiment of the fuse resistor of this invention.
  • Figure 2 is an end elevational view of the embodiment of the fuse resistor of this invention shown in Figure 1.
  • Figure 3 is an exploded perspective view of the embodiment of the fuse resistor of this invention shown in Figure 1.
  • Figure 4 is a longitudinal elevational view of another embodiment of the fuse resistor of this invention.
  • Figure 5 is an end elevational view of the embodiment of the fuse resistor of this invention shown in Figure 4.
  • Figure 6 is an exploded perspective view of the embodiment of the fuse resistor of this invention shown in Figure 4.
  • FIG. 7 is a perspective view of still another embodiment of the fuse resistor of the present invention.
  • Figure 8 is a sectional view taken along line 88. of Figure 7.
  • Fuse resistor 10 comprises an electrical resistor element 12 having a pair of conductive wire terminal leads 14 and 16 extending from the ends thereof.
  • Resistor element 12 may be any one of the well known types of resistors; for example, (1) a core of insulating material having awire.
  • Band 18 has a pair of spaced, substantially parallel arms 2t] and 22 extending outwardly therefrom and a substantially U-shaped trough portion 24. between the arms 2t? and 22 with the open end of the U facingoutwardy.
  • One of the terminal leads, such as lead 14, Is bent back over resistance element 12 and extends into trough 24.
  • Trough 24 is filled with a fusible metal 26- (Figure 2), such as solder, which electrically and mechanically connects terminal lead 14 to band 18.
  • Fusible metal 26 is of a composition which will melt at the predetermined temperature at which it is desired for the resistor to open. The particular composition of a solder which will melt at a desired temperature can be found in any well known handbook or catalog on solders.
  • a terminal member 28 of an electrically conductive metal is secured to band 18 and extends beyond the end of. resistor element 12.
  • Terminal member 28 can either be an integral part of band 18 or secured thereto such as by brazing or welding.
  • terminal member 28 can be soldered to band 18, care should be taken to usea solder which will melt at a higher temperature than the melting temperature of fusible metal 26.
  • terminal member 28 is shown extending from the same end of resistor element 12 as terminal lead 14 so that the fuse resistor 16 ⁇ is terminated at each end thereof, terminal member 28 may extend radially from the fuse resistor 10 or from the same end as terminal lead 16.
  • resistor element 12 is shown to be of circular cross-section with the terminal band 18 being of similar configuration, resistor element 12 can be of any 24 by the fusible metal 26.
  • the fuse resistor 10 can be manufactured easily and quickly so as to be relatively inexpensive.
  • fuse resistor 10 is connected into the desired circuit through terminal lead 16 and terminal member 28.
  • resistor element 12 is connected in the circuit at one end through terminal lead 16 and at the other end through terminal lead 14, fusable metal 26, band 18, and terminal member 28.
  • resistor element 12 will heat up slightly but not to the melting point of fusable metal 26.
  • resistor element 12 will become overheated and when it reaches the melting point temperature of fusable metal 26, the fusable metal 26 will melt and the terminal lead 14 through its own resiliency will spring out of trough 24 to open circuit the fuse resistor 10. This in turn cuts off the flow of current through the circuit and thereby protects the other components in the circuit from becoming damaged by the overload of current.
  • FIGS 4, 5, and 6 show another embodiment of the fuse resistor of this invention, generally designated as 30.
  • Fuse resistor 30 comprises a body 32 of an electrical insulating material, such as a plastic or ceramic, having a pair of spaced holes 34 and 36 extending longitudinally therethrough slightly beneath the surface thereof.
  • Body 32 is also shown to have a central longitudinally extending hole 38 which can be used for mounting the fuse resistor 30.
  • a terminal lead 40 of an electrically conductive metal fits tightly into hole 34 and projects beyond body 32 from only one end thereof.
  • a terminal lead 42 of an electrically conductive metal fits in hole 36 and projects beyond body 32 from both ends thereof.
  • Body 32 is provided adjacent its end from which terminal lead 40 projects with a transverse slot 44 extending from the surface of body 32 to the hole 34 to expose a portion of terminal lead 40.
  • a band 46 of an electrically conductive metal fits tightly around body 32 adjacent the other end of the body.
  • Band 46 has a pair of spaced, substantially parallel arms 48 and 50 extending outwardly therefrom and a substantially U-shaped trough portion 52 between arms 48 and 50 with the open end of the U facing outwardly.
  • a wire 54 of an electrical resistance metal is helically wound around and along body 32. At one end wire 54 extends across and into slot 44 and contacts terminal lead 40. Wire 54 may be welded or soldered to terminal lead 40 to insure good electrical contact thereto.
  • the other end of wire 54 is connected to band 46 such as by welding, soldering, or the like.
  • the portion 42a of terminal lead 42 which projects beyond the end of body 32 opposite the end of the body to which band 46 is secured is bent back over body 32 and extends into trough 52.
  • Trough 52 is filled with a fusable metal 56, such as solder, to electrically and mechanically connect terminal lead 42 to band 46.
  • body 32 and resistance wire 54 may be provided with a protective, electrical insulating coating or jacket, leaving portion 42a of terminal lead 42 and trough 52 exposed.
  • body 32 is shown to be of elliptical cross-sectional configuration, it may be of any desired cross-sectional con figuration, such as rectangular, circular, or the like.
  • the resistance material is shown to be a metal Wire, it can also be a film of a resistance material, such as carbon or a metal, coated on the surface of body 32 and extending into slot 44 to contact terminal lead 40 as well as contacting band 46.
  • Fuse resistor 39 is used and operates in the same manner as fuse resistor 10 previously described.
  • FIG. 7 shows still another embodiment of the fuse resistor of the present invention, generally designated as 58.
  • Fuse resistor 58 comprises a body 60 of an electrical insulating material, such as a plastic or ceramic, having a pair of spaced holes 62 and 64 extending longitudinally therethrough slightly beneath the surface thereof, and a central longitudinally extending hole 66.
  • a terminal lead 68 of an electrically conductive metal fits tightly into hole 62 and projects beyond one end of body 60.
  • a wire member 70 of an electrically conductive metal fits into hole 64 and projects beyond the other end of body 60, with the projecting end of the wire member 70 being bent back over the outer surface of the body 60.
  • Body 60 is provided adjacent its end from which terminal lead 68 projects with a transverse slot 72 extending from the surface of body 60 to the hole 62 to expose a portion of the terminal lead 68.
  • Body 60 is also provided adjacent its end fro-m which wire member 70 projects with a transverse slot 74 extending from the surface of the body 60 to the hole 64 to expose a portion of the wire member 74
  • a wire 76 of an electrical resistance metal is helically wound around and along body 60. At one end wire 76 extends across and into slot 72 and contacts terminal lead 68. At the other end wire 76 extends across and into slot 74 and contacts wire member 70. Wire 76 may be welded or soldered to terminal lead 68 and wire member 70 to insure good electrical contact thereto.
  • a second terminal lead 78 of an electrical conducting metal extends through central hole 66 and projects beyond both ends of the body 69.
  • the end 78a of the second terminal lead 78 which projects from the same end of body 60 as the first terminal lead 68 is bent back over the outer surface of body 6-0 and extends over the end of wire member 70.
  • the end of wire member 70 is provided with a substantially V-shaped trough portion into which the end 73a of second terminal lead 78 extends.
  • Trough 80 is filled with a fusable metal 82, such as solder, to electrically and mechanically connect second terminal lead 78 to wire member 743.
  • body 60 and resistance wire 76 may be provided with a protective, electrical insulating coating or jacket, leaving the portions of terminal leads 68 and 78 and wire member 70 which project beyond body 60 exposed.
  • body 60 is shown to be of elliptical cross-sectional configuration, it may be of any desired cross-sectional configuration, such as rectangular, circular, or the like.
  • the resistance material is shown to be a metal wire, it can also be a film of a resistance material, such as carbon or a metal, coated on the surface of body 60 and extending into slots 72 and 74 to contact terminal lead 68 and wire member 70.
  • Fuse resistor 58 is used and operates in the same manner as fuse resistor 10 previously described.
  • a fuse resistor comprising an electrical resistance element, a band of an electrically conductive metal secured around said resistance element, means electrically connecting one end of said resistance element to said band, a terminal member of electrically conductive metal, means connecting said terminal member to said band, one of said connecting means comprising a wire of electrically conductive metal bent back over and extending along said resistance element and releasably secured to said band by a fusable metal, and a terminal member of an electrically conductive metal secured to the other end of said resistance element.
  • a fuse resistor comprising a resistor element having an electrically conducting metal wire terminal lead extending from each end thereof, a band of electrically conducting metal secured around said resistor element, one of said terminal leads being bent back over and extending along said resistor element and releasably secured to said band by a fusable metal, and a terminal member secured to said band and extending beyond said resistor element.
  • a fuse resistor as set forth in claim 4 in which said band is provided with a substantially U-shaped trough, the open end of which faces outwardly away from the resistor element and the terminal lead extends into said trough and is releasably secured therein by the fusable metal.
  • a fuse resistor as set forth in claim 4 in which said band is provided with a pair of spaced, substantially parallel arms extending outwardly therefrom and a substantially U-shaped trough portion between said arms with the open end of the U facing outwardly away from the resistor element, and the terminal lead extends into said trough and is releasably secured therein by the fusable metal.
  • a fuse resistor comprising a body of electrical insulating material having a pair of spaced holes extending longitudinally therethrough and slightly beneath the surface thereof, a first terminal member of electrically conducting metal fitting into one of said holes and projecting beyond one end of said body, a transverse slot in said body extending from the surface thereof to said one hole to expose a portion of said first terminal member, a second terminal member of electrically conducting metal fitting into said other hole and projecting beyond both ends of said body, a band of electrically conducting metal secured around said body, an electrical resistance material on the surface of said body, said resistance material at one end extending into said slot and electrically contacting said first terminal member and at the other end contacting said band, and one end of said second terminal member being bent back over said body and releasably secured to said band by a fusable metal.
  • a fuse resistor comprising an electrical resistance element, a pair of terminal members of electrical conducting metal extending from said resistance element, one of said terminals being connected to one end of said resistance element, and means connecting the other terminal to the other end of said resistance element, said means including a substantially resilient member of electrical conductive metal extending from an end of said resistance element and bent back over and extending along said resistance element, and a junction of fusable metal at the end of said member over said resistance element.
  • a fuse resistor comprising a body of electrical insulating material having three spaced holes extending longitudinally therethrough, a first terminal member of electrically conductive metal fitting into one of said holes and projecting beyond an end of said body, a transverse slot in said body extending from the surface of said body to said one hole to expose a portion of said first terminal member, a member of electrically conductive metal fitting into a second of said holes and projecting beyond an end of said body, the projecting end of said metal member being bent back over the body, a second transverse slot in said body extending from the surface of said body to said second hole to expose a portion of said metal member, an electrical resistance material on the surface of said body, said resistance material extending into said slots and electrically contacting said first terminal member and said metal member, and a second terminal member of electrically conductive metal extending through the third hole and projecting beyond both ends of said body, one of the projecting ends of said second terminal member being bent back over said body and connected to the end of said metal member by a fusable metal.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)
US771533A 1958-11-03 1958-11-03 Fuse resistor Expired - Lifetime US2966649A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL121181D NL121181C (en)) 1958-11-03
NL244986D NL244986A (en)) 1958-11-03
US771533A US2966649A (en) 1958-11-03 1958-11-03 Fuse resistor
FR792041A FR1221530A (fr) 1958-11-03 1959-04-14 Résistance fusible
DEI16437A DE1102249B (de) 1958-11-03 1959-05-15 Widerstand mit Schmelzsicherung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US771533A US2966649A (en) 1958-11-03 1958-11-03 Fuse resistor

Publications (1)

Publication Number Publication Date
US2966649A true US2966649A (en) 1960-12-27

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ID=25092141

Family Applications (1)

Application Number Title Priority Date Filing Date
US771533A Expired - Lifetime US2966649A (en) 1958-11-03 1958-11-03 Fuse resistor

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US (1) US2966649A (en))
DE (1) DE1102249B (en))
FR (1) FR1221530A (en))
NL (2) NL121181C (en))

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371412A (en) * 1966-02-11 1968-03-05 Dale Electronics Method of terminating a resistor
US3534248A (en) * 1968-02-19 1970-10-13 Western Electric Co Electrical network having components disposed inside and about a tube and method of making it
US4047143A (en) * 1976-07-09 1977-09-06 Western Electric Company, Inc. Fused resistive electrical protection device
US4150355A (en) * 1978-01-04 1979-04-17 Amp Incorporated Electrical splices for wire wound resistors
EP1003190A3 (de) * 1998-11-17 2002-09-25 Braun GmbH Durchlauferhitzer zum Erwärmen von Wasser
EP1826793A1 (fr) * 2006-02-24 2007-08-29 ABB France Dispositif de protection contre les surtensions avec déconnecteur thermique à double surface de contact
EP1970932A3 (de) * 2007-03-14 2010-05-26 Siemens Aktiengesellschaft Vorrichtung zur thermischen Überwachung eines Bauelementes
US20170098522A1 (en) * 2015-10-06 2017-04-06 Ty-Ohm Electronic Works Co., Ltd. Temperature safety resistor assembly

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1154865B (de) * 1961-11-02 1963-09-26 Hans Ritz Dr Ing Thermische Schutzeinrichtung mit einem Schutzleiter fuer Spannungswandler oder Transformatoren
DE1149106B (de) * 1962-02-05 1963-05-22 Deutsche Bundesbahn Schutzeinrichtung fuer Akkumulator-Batterien mit interner Absicherung
DE1515624B1 (de) * 1965-08-24 1970-04-09 Vitrohm Gmbh Co Kg Elektrischer Widerstand mit Schmelzsicherung
DE2604185C3 (de) * 1976-02-04 1982-02-25 Brown, Boveri & Cie Ag, 6800 Mannheim Übertemperatur-Schutzeinrichtung für einen elektronischen Schalter
CH632102A5 (en) * 1978-12-01 1982-09-15 Siemens Ag Albis Resistor using thick-film technology
FR2471039A1 (fr) * 1979-12-04 1981-06-12 Ferodo Sa Dispositif de fusible pour circuit electrique, notamment d'alimentation d'un moteur
DE3131630C2 (de) * 1981-08-10 1983-11-17 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zum Schutz von über Anschlußleitungen angeschalteten elektronischen Einrichtungen
DE3216474A1 (de) * 1982-02-17 1983-08-25 M. Krah Elektrotechnische Fabrik GmbH + Co KG, 5962 Drolshagen Elektrischer widerstand
US4821010A (en) * 1987-12-30 1989-04-11 Therm-O-Disc, Incorporated Thermal cutoff heater

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1238124A (en) * 1916-02-26 1917-08-28 Royal E Frickey Electric heating unit.
FR931560A (fr) * 1941-01-30 1948-02-26 Alsthom Cgee Disposition de protection des foyers électriques comportant des éléments chauffants du type cuirassé

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1238124A (en) * 1916-02-26 1917-08-28 Royal E Frickey Electric heating unit.
FR931560A (fr) * 1941-01-30 1948-02-26 Alsthom Cgee Disposition de protection des foyers électriques comportant des éléments chauffants du type cuirassé

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3371412A (en) * 1966-02-11 1968-03-05 Dale Electronics Method of terminating a resistor
US3534248A (en) * 1968-02-19 1970-10-13 Western Electric Co Electrical network having components disposed inside and about a tube and method of making it
US4047143A (en) * 1976-07-09 1977-09-06 Western Electric Company, Inc. Fused resistive electrical protection device
US4150355A (en) * 1978-01-04 1979-04-17 Amp Incorporated Electrical splices for wire wound resistors
EP1003190A3 (de) * 1998-11-17 2002-09-25 Braun GmbH Durchlauferhitzer zum Erwärmen von Wasser
EP1826793A1 (fr) * 2006-02-24 2007-08-29 ABB France Dispositif de protection contre les surtensions avec déconnecteur thermique à double surface de contact
FR2897980A1 (fr) * 2006-02-24 2007-08-31 Soule Prot Surtensions Sa Dispositif de protection contre les surtensions avec deconnecteur thermique a double surface de contact
US20080019073A1 (en) * 2006-02-24 2008-01-24 Lagnoux Alain R R Overvoltage protection device with dual contact surface thermal disconnector
US7558041B2 (en) 2006-02-24 2009-07-07 Abb France Overvoltage protection device with dual contact surface thermal disconnector
CN101039030B (zh) * 2006-02-24 2011-04-20 Abb法国公司 具有双接触表面热断路器的过压保护装置
EP1970932A3 (de) * 2007-03-14 2010-05-26 Siemens Aktiengesellschaft Vorrichtung zur thermischen Überwachung eines Bauelementes
US20170098522A1 (en) * 2015-10-06 2017-04-06 Ty-Ohm Electronic Works Co., Ltd. Temperature safety resistor assembly

Also Published As

Publication number Publication date
NL121181C (en))
NL244986A (en))
DE1102249B (de) 1961-03-16
FR1221530A (fr) 1960-06-02

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