[go: up one dir, main page]

US3575681A - Remote fuse destruction device - Google Patents

Remote fuse destruction device Download PDF

Info

Publication number
US3575681A
US3575681A US832124A US3575681DA US3575681A US 3575681 A US3575681 A US 3575681A US 832124 A US832124 A US 832124A US 3575681D A US3575681D A US 3575681DA US 3575681 A US3575681 A US 3575681A
Authority
US
United States
Prior art keywords
fuse
link
squib
meltable portion
main electrode
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
US832124A
Inventor
Alan Samuel Nusbaum
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of US3575681A publication Critical patent/US3575681A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • H01H85/0241—Structural association of a fuse and another component or apparatus
    • 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
    • H01H85/46—Circuit arrangements not adapted to a particular application of the protective device
    • H01H2085/466—Circuit arrangements not adapted to a particular application of the protective device with remote controlled forced fusing

Definitions

  • ABSTRACT The combination of a fuse and a means which is [50] Field of Search 102/24; controllable from a distance, as by radio transmission and 337/160, 182, 185, 296, l; 317/234 (4) 3 reception, to open a circuit by destroying the fuse.
  • an electrical fuse which has a thermal means mounted in sufficiently close vicinity to the fuseable link portion of the fuse at the customers residence as to melt the fuseablellink and thereby to destroy the fuse whereby the customers electrical service is disconnected.
  • the thermal means may include an electrical switch means such as a silicon-controlled rectifier (hereinafter SCR) in series with a squib and may include exothermic materials, that is, materials which produce more heat when heated by the squib than the heat applied thereto.
  • SCR silicon-controlled rectifier
  • Suitable means such as a coded receiving means, which may be any sort of a receiver including a radio receiver, may be provided to apply control potential to the SCR. If remote metering means are provided to read this customers electrical meter, the remote metering means may include controlling means to apply the control potential to the SCR when the customer's service is to be disconnected.
  • FIG. 1 is an elevational view of the fuse of this invention
  • FIG. 2 is an elevational view of the fuse of FIG. I viewed, however, at a 90 angle from the view thereof.
  • taken in FIG. I and FIG. 3 is a diagrammatic showing of an electrical circuit in which the fuse of FIGS. 1 and 2 may be connected.
  • a fuse 8 which includes a fuse link 10 is provided.
  • This fuse link 10 may be a thin flat plate of fuseable material having a narrow necked down portion 12 about halfway between its ends 16 andl8.
  • the central portion of the fuse link 10 may be included in a container 14.
  • the bladelike ends 16 and 18 of the fuse link 10 may fit into contactors (not shown).
  • spacers 20 and 22 are fixed to the link 10 at opposite sides of the neck portion 12 and a bridge means comprising an insulation board 24 is fixed to the spacers 20 and 22, whereby the board 24 is spaced from the link 10.
  • SCR 26 is fixed to the board 24 on the side thereof towards the link I0, or the SCR 26 is deposited on a chip which is fixed to the board 24, and a squib 28 is fixed to the exposed side of the SCR 26.
  • An exothermic material 30, that is a material which produces heat when it is self heated such as any easily combustible material, may be applied to the free face of the squib 28.
  • FIG. 3 The circuit for the SCR 26 and for the squib 28 of FIG. 2 is shown in FIG. 3.
  • a coded receiver 32 which may be a radio receiver having an antenna 34
  • a control signal is applied to thecontrol electrode of the SCR 26.
  • the main electrodes of the SCR 26 are connected respectively to ground and to one terminal of the squib 28, whose other terminal is connected to any convenient point of the electrical supply such as to the fuse link 10 at the location of one of the spacers 22.
  • the exothermic material 30 may be omitted. It is noted that the SCR 26, the squib 28 and the exothermic material 30 are all located within the container 14 and that the connections to one of the main electrodes of the SCR 26 and the connection to the control electrode of the SCR 26 are taken out of the container 14 at any convenient location.
  • a fuse comprising:
  • a semiconductor switch having two main electrodes and mounted on said support means and having one main electrode connected to said link at one side of said meltable portion
  • an electrically controlled heat producing means having a terminal mounted on said support means and facing said meltable portion
  • the other main electrode of said semiconductor switch being connected to a terminal of said electrically controlled heat producing means.
  • a fuse comprising:
  • a silicon-controlled rectifier mounted on said bridge portion and having a main electrode connected to said link at one side of said meltable portion
  • the other main electrode of the said silicon-controlled rectifier being connected to a terminal of said squib.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Fuses (AREA)
  • Air Bags (AREA)

Abstract

The combination of a fuse and a means which is controllable from a distance, as by radio transmission and reception, to open a circuit by destroying the fuse.

Description

United States Patent nu 3,575,681
[72] Inventor AlanSamuelNusbaum [56] References Cited Ph x. A z- UNITED STATES PATENTS 5; 9f:- f i 1969 3,161,131 12/1964 Kilmer 102/24 t d 2,911,504 11/1959 Cohn 337/296 e a I 2,763,752 9/1956 Paet0w.... 337/182 ss'gm Franklin 'z 1,966,466 7/1934 Smalley 337/182(x FOREIGN PATENTS 943,070 5/1956 Germanyw, 337/185 54 REMOTE FUSE DESTRUCTlON DEVICE f f' i Gnheany 5 Claims, 3 Drawing Figs. Assistant Exammer-Dew1tt M. Morgan [52] U S Cl 337,! Attorney-Muellcr&A1chele 3 7 i [51] Int. Cl H0lh 85/00 ABSTRACT: The combination of a fuse and a means which is [50] Field of Search 102/24; controllable from a distance, as by radio transmission and 337/160, 182, 185, 296, l; 317/234 (4) 3 reception, to open a circuit by destroying the fuse.
ll ll REMOTE FUSE DESTRUCTION DEVICE BACKGROUND OF THE INVENTION The public utility companies that supply electricity must from time to time read meters in preparation of bills and when the customers service is to be discontinued, the company must disconnect the electrical supply at the customer's residence. One method of disconnecting the electrical supply SUMMARY OF THE INVENTION In accordance with this invention an electrical fuse is provided which has a thermal means mounted in sufficiently close vicinity to the fuseable link portion of the fuse at the customers residence as to melt the fuseablellink and thereby to destroy the fuse whereby the customers electrical service is disconnected. The thermal means may include an electrical switch means such as a silicon-controlled rectifier (hereinafter SCR) in series with a squib and may include exothermic materials, that is, materials which produce more heat when heated by the squib than the heat applied thereto. Suitable means such as a coded receiving means, which may be any sort of a receiver including a radio receiver, may be provided to apply control potential to the SCR. If remote metering means are provided to read this customers electrical meter, the remote metering means may include controlling means to apply the control potential to the SCR when the customer's service is to be disconnected.
BRIEF DESCRIPTION OF THE DRAWING The invention will be better understood upon reading the following description in connection with the accompanying drawing in which:
FIG. 1 is an elevational view of the fuse of this invention,
FIG. 2is an elevational view of the fuse of FIG. I viewed, however, at a 90 angle from the view thereof. taken in FIG. I and FIG. 3 is a diagrammatic showing of an electrical circuit in which the fuse of FIGS. 1 and 2 may be connected.
DESCRIPTION Referring to FIG. I, a fuse 8 which includes a fuse link 10 is provided. This fuse link 10 may be a thin flat plate of fuseable material having a narrow necked down portion 12 about halfway between its ends 16 andl8. The central portion of the fuse link 10 may be included in a container 14. The bladelike ends 16 and 18 of the fuse link 10 may fit into contactors (not shown). When the fuse 8 is a main fuse of a residence, all the current supplied to that residence flows through the fuse, whereby removal of the fuse or its destruction disconnects the residence from the electrical power supply. FIG. 2 illustrates a means to destroy the fuse 8.
As shown in FIG. 2, spacers 20 and 22 are fixed to the link 10 at opposite sides of the neck portion 12 and a bridge means comprising an insulation board 24 is fixed to the spacers 20 and 22, whereby the board 24 is spaced from the link 10. An
SCR 26 is fixed to the board 24 on the side thereof towards the link I0, or the SCR 26 is deposited on a chip which is fixed to the board 24, anda squib 28 is fixed to the exposed side of the SCR 26. An exothermic material 30, that is a material which produces heat when it is self heated such as any easily combustible material, may be applied to the free face of the squib 28.
The circuit for the SCR 26 and for the squib 28 of FIG. 2 is shown in FIG. 3. When the proper coded signal is sent to a coded receiver 32, which may be a radio receiver having an antenna 34, a control signal is applied to thecontrol electrode of the SCR 26. The main electrodes of the SCR 26 are connected respectively to ground and to one terminal of the squib 28, whose other terminal is connected to any convenient point of the electrical supply such as to the fuse link 10 at the location of one of the spacers 22. When the receiver 32 applies a control voltage to the control electrode of the SCR 26, current flows through the squib 28, causing it to become heated and causing the exothermical material 30 to ignite, heating the fuse link I0 sufficiently so that the necked down portion 12 of the fuse link 10 will melt, opening the main fuse 8 of the residence and thereby disconnecting the customers electrical service.
If the heat produced by the squib 28 is itself sufficient to melt the necked down portion 12 of the fuse link 10, then the exothermic material 30 may be omitted. It is noted that the SCR 26, the squib 28 and the exothermic material 30 are all located within the container 14 and that the connections to one of the main electrodes of the SCR 26 and the connection to the control electrode of the SCR 26 are taken out of the container 14 at any convenient location.
Iclaim:
I. A fuse comprising:
a fuse link having a meltable portion,
support means fixed to said link and extending in the vicinity of said meltable portion,
a semiconductor switch having two main electrodes and mounted on said support means and having one main electrode connected to said link at one side of said meltable portion,
an electrically controlled heat producing means having a terminal mounted on said support means and facing said meltable portion, and
the other main electrode of said semiconductor switch being connected to a terminal of said electrically controlled heat producing means.
2. A fuse comprising:
a fuse link having a meltable portion,
a bridge means bridging said meltable portion,
a silicon-controlled rectifier mounted on said bridge portion and having a main electrode connected to said link at one side of said meltable portion,
a squib mounted on said bridge and facing said meltable portion, and
the other main electrode of the said silicon-controlled rectifier being connected to a terminal of said squib.
3. The invention as expressed in claim 2 in which said meltable portion, said bridge means and said siliconcontrolled rectifier are mounted in a single container.
4. The invention as expressed in claim 3 in which an exothermic material is provided in contact with said squib and also in said container.
5. The invention as expressed in claim 3 in which a connection to the other terminal of the squib and the connection to the other main electrode of said siliconcontrolled rectifier extends through said container.

Claims (5)

1. A fuse comprising: a fuse link having a meltable portion, support means fixed to said link and extending in the vicinity of said meltable portion, a semiconductor switch having two main electrodes and mounted on said support means and having one main electrode connected to said link at one side of said meltable portion, an electrically controlled heat producing means having a terminal mounted on said support means and facing said meltable portion, and the other main electrode of said semiconductor switch being connected to a terminal of said electrically controlled heat producing means.
2. A fuse comprising: a fuse link having a meltable portion, a bridge means bridging said meltable portion, a silicon-controlled rectifier mounted on said bridge portion and having a main electrode connected to said link at one side of said meltable portion, a squib mounted on said bridge and facing said meltable portion, and the other main electrode of the said silicon-controlled rectifier being connected to a terminal of said squib.
3. The invention as expressed in claim 2 in which said meltable portion, said bridge means and said silicon-controlled rectifier are mounted in a single container.
4. The invention as expressed in claim 3 in which an exothermic material is provided in contact with said squib and also in said container.
5. The invention as expressed in claim 3 in which a connection to the other terminal of the squib and the connection to the other main electrode of said silicon-controlled rectifier extends through said container.
US832124A 1969-06-11 1969-06-11 Remote fuse destruction device Expired - Lifetime US3575681A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US83212469A 1969-06-11 1969-06-11

Publications (1)

Publication Number Publication Date
US3575681A true US3575681A (en) 1971-04-20

Family

ID=25260757

Family Applications (1)

Application Number Title Priority Date Filing Date
US832124A Expired - Lifetime US3575681A (en) 1969-06-11 1969-06-11 Remote fuse destruction device

Country Status (1)

Country Link
US (1) US3575681A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124835A (en) * 1976-03-26 1978-11-07 Cahill Jr William J Remotely controlled utility service interrupter system and apparatus
FR2598556A1 (en) * 1986-05-06 1987-11-13 Esswein Sa Self-destruct electrical protection device
US5256899A (en) * 1991-12-24 1993-10-26 Xerox Corporation Integrated circuit fuse link having an exothermic charge adjacent the fuse portion
EP0924735A2 (en) * 1997-12-16 1999-06-23 Delphi Automotive Systems Deutschland GmbH A fuse arrangement
US6157288A (en) * 1998-03-12 2000-12-05 Yazaki Corporation Current breaking system for vehicle
US20140139314A1 (en) * 2012-11-20 2014-05-22 Tyco Electronics Corporation Remote Activated Fuse and Circuit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1966466A (en) * 1930-12-23 1934-07-17 Hevi Duty Electric Co Electrically heated electric fuse circuit
DE943070C (en) * 1941-03-15 1956-05-09 Aeg Closed, remote-controlled fuse
US2763752A (en) * 1953-10-12 1956-09-18 Siemens Ag Electric fuse for retarded or rapid operation
US2911504A (en) * 1958-05-15 1959-11-03 Sigmund Cohn Corp Fuse member and method of making the same
US3161131A (en) * 1963-07-01 1964-12-15 Earl E Kilmer Explosive means for cutting an electric cable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1966466A (en) * 1930-12-23 1934-07-17 Hevi Duty Electric Co Electrically heated electric fuse circuit
DE943070C (en) * 1941-03-15 1956-05-09 Aeg Closed, remote-controlled fuse
US2763752A (en) * 1953-10-12 1956-09-18 Siemens Ag Electric fuse for retarded or rapid operation
US2911504A (en) * 1958-05-15 1959-11-03 Sigmund Cohn Corp Fuse member and method of making the same
US3161131A (en) * 1963-07-01 1964-12-15 Earl E Kilmer Explosive means for cutting an electric cable

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4124835A (en) * 1976-03-26 1978-11-07 Cahill Jr William J Remotely controlled utility service interrupter system and apparatus
FR2598556A1 (en) * 1986-05-06 1987-11-13 Esswein Sa Self-destruct electrical protection device
US5256899A (en) * 1991-12-24 1993-10-26 Xerox Corporation Integrated circuit fuse link having an exothermic charge adjacent the fuse portion
EP0924735A2 (en) * 1997-12-16 1999-06-23 Delphi Automotive Systems Deutschland GmbH A fuse arrangement
EP0924735A3 (en) * 1997-12-16 1999-11-03 Delphi Automotive Systems Deutschland GmbH A fuse arrangement
US6157288A (en) * 1998-03-12 2000-12-05 Yazaki Corporation Current breaking system for vehicle
US20140139314A1 (en) * 2012-11-20 2014-05-22 Tyco Electronics Corporation Remote Activated Fuse and Circuit
US9887057B2 (en) * 2012-11-20 2018-02-06 Littelfuse, Inc. Remote activated fuse and circuit

Similar Documents

Publication Publication Date Title
US3629766A (en) Fusible link circuit protective device
DE3377900D1 (en) Connector containing fusible material and having intrinsic temperature control
ES8608172A1 (en) Metering system for measuring parameters of high ac electric energy flowing in an electric conductor.
US3575681A (en) Remote fuse destruction device
GB1282326A (en) Method of connecting electrical conductors
ATE92704T1 (en) ELECTRIC HEATING DEVICES.
GB1325247A (en) Electric meters
GB1401075A (en) Protection apparatus for an electrical load
MY102591A (en) Fuse for an alternating current power circuit.
GB1424273A (en) Electrical protection system
GB1253950A (en) Time delay bimetallic relay
USRE21148E (en) Meter base
US3092739A (en) Dry circuit switching means
CA1121412A (en) Circuit breaker with parallel shorting element
GB1243428A (en) Methods of making relays
CA2050111A1 (en) Apparatus for line card power cross protection
US999196A (en) Appliance for preventing fraud in connection with electricity-meters.
US3736544A (en) High voltage temperature switch
GB1462087A (en) Contact arrangements for electrical switches
MY102036A (en) Alternating current power circuit and fuse therefor
DE3672021D1 (en) NH FUSE INSERT WITH SAFETY DETECTOR.
US2066024A (en) Circuit closing device
JPS5623756A (en) Ceramic package and manufacture thereof
SU575245A1 (en) Device for protecting contact power supply line from overheating
US905594A (en) Device for locating a molten distributing-fuse.