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EP0507465A3 - A resistor capable of acting as a circuit breaker - Google Patents

A resistor capable of acting as a circuit breaker Download PDF

Info

Publication number
EP0507465A3
EP0507465A3 EP19920302250 EP92302250A EP0507465A3 EP 0507465 A3 EP0507465 A3 EP 0507465A3 EP 19920302250 EP19920302250 EP 19920302250 EP 92302250 A EP92302250 A EP 92302250A EP 0507465 A3 EP0507465 A3 EP 0507465A3
Authority
EP
European Patent Office
Prior art keywords
resistor
acting
circuit
circuit breaker
type resistor
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.)
Granted
Application number
EP19920302250
Other versions
EP0507465A2 (en
EP0507465B1 (en
Inventor
Richard E. Caddock, Jr.
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.)
Caddock Electronics Inc
Original Assignee
Caddock Electronics Inc
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
Application filed by Caddock Electronics Inc filed Critical Caddock Electronics Inc
Priority to EP97104766A priority Critical patent/EP0789381A1/en
Publication of EP0507465A2 publication Critical patent/EP0507465A2/en
Publication of EP0507465A3 publication Critical patent/EP0507465A3/en
Application granted granted Critical
Publication of EP0507465B1 publication Critical patent/EP0507465B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/13—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material current responsive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • 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
    • H01H85/0039—Means for influencing the rupture process of the fusible element
    • H01H85/0073—Expansion or rupture of the insulating support for the fusible element
    • 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
    • H01H85/046—Fuses formed as printed circuits
    • 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
    • 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
    • H01H85/36—Means for applying mechanical tension to fusible member

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuses (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Details Of Resistors (AREA)
  • Push-Button Switches (AREA)
  • Parts Printed On Printed Circuit Boards (AREA)
  • Thermally Actuated Switches (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Arc-Extinguishing Devices That Are Switches (AREA)

Abstract

An apparatus and method by which a flat film-type resistor (10) is intentionally caused to thermal-shock fracture (Figure 1) in response to a predetermined high-voltage overload condition. The resistor includes flat film-type resistor coatings (28, 29) connected to traces (16, 18, 52). Preferably a stressed spring wire (71, 72) is mounted on such film-type resistor and connected in circuit with it. A predetermined solder (76) and temperature gradient are employed to hold the spring wire in bent condition until the solder (76) melts, whereupon the spring (71, 72) flexes and the circuit breaks. Heatsink portions (43-46) are provided in the circuit board for such resistor and receive pins (33-40) thereof. <IMAGE>
EP92302250A 1991-04-02 1992-03-16 A resistor capable of acting as a circuit breaker Expired - Lifetime EP0507465B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97104766A EP0789381A1 (en) 1991-04-02 1992-03-16 A resistor capable of acting as a circuit breaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US67960391A 1991-04-02 1991-04-02
US679603 1991-04-02

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP97104766A Division EP0789381A1 (en) 1991-04-02 1992-03-16 A resistor capable of acting as a circuit breaker

Publications (3)

Publication Number Publication Date
EP0507465A2 EP0507465A2 (en) 1992-10-07
EP0507465A3 true EP0507465A3 (en) 1993-02-03
EP0507465B1 EP0507465B1 (en) 1998-12-02

Family

ID=24727562

Family Applications (2)

Application Number Title Priority Date Filing Date
EP97104766A Withdrawn EP0789381A1 (en) 1991-04-02 1992-03-16 A resistor capable of acting as a circuit breaker
EP92302250A Expired - Lifetime EP0507465B1 (en) 1991-04-02 1992-03-16 A resistor capable of acting as a circuit breaker

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP97104766A Withdrawn EP0789381A1 (en) 1991-04-02 1992-03-16 A resistor capable of acting as a circuit breaker

Country Status (5)

Country Link
EP (2) EP0789381A1 (en)
JP (1) JPH0821489B2 (en)
AT (1) ATE174154T1 (en)
DE (1) DE69227719T2 (en)
ES (1) ES2124242T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5361300A (en) * 1993-01-19 1994-11-01 Caddock Electronics, Inc. Balancing resistor and thermistor network for telephone circuits, and combination thereof with relay
US5481242A (en) * 1994-05-10 1996-01-02 Caddock Electronics, Inc. Debris-reducing telephone resistor combination and method
US5594407A (en) * 1994-07-12 1997-01-14 Caddock Electronics, Inc. Debris-reducing film-type resistor and method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109760A1 (en) * 1970-03-10 1971-09-30 Ericsson Telefon Ab L M Electrical safety fuse
DE3245629A1 (en) * 1982-12-09 1984-06-14 Telefunken electronic GmbH, 6000 Frankfurt Fuse element with a thick-film resistor arrangement
GB2163307A (en) * 1984-08-15 1986-02-19 Crystalate Electronics Fusible electrical resistor
EP0395231A2 (en) * 1989-04-25 1990-10-31 Gpt Limited Protective arrangement for telecommunications line interface circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6124205A (en) * 1984-07-13 1986-02-01 株式会社タイセー Speed control resistor of blower for automobile

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2109760A1 (en) * 1970-03-10 1971-09-30 Ericsson Telefon Ab L M Electrical safety fuse
DE3245629A1 (en) * 1982-12-09 1984-06-14 Telefunken electronic GmbH, 6000 Frankfurt Fuse element with a thick-film resistor arrangement
GB2163307A (en) * 1984-08-15 1986-02-19 Crystalate Electronics Fusible electrical resistor
EP0395231A2 (en) * 1989-04-25 1990-10-31 Gpt Limited Protective arrangement for telecommunications line interface circuit

Also Published As

Publication number Publication date
EP0507465A2 (en) 1992-10-07
JPH05101913A (en) 1993-04-23
ATE174154T1 (en) 1998-12-15
ES2124242T3 (en) 1999-02-01
EP0507465B1 (en) 1998-12-02
DE69227719D1 (en) 1999-01-14
JPH0821489B2 (en) 1996-03-04
EP0789381A1 (en) 1997-08-13
DE69227719T2 (en) 1999-04-22

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