GB1410836A - Heat-operated short-circuiting arrangements - Google Patents

Heat-operated short-circuiting arrangements

Info

Publication number
GB1410836A
GB1410836A GB1413773A GB1413773A GB1410836A GB 1410836 A GB1410836 A GB 1410836A GB 1413773 A GB1413773 A GB 1413773A GB 1413773 A GB1413773 A GB 1413773A GB 1410836 A GB1410836 A GB 1410836A
Authority
GB
United Kingdom
Prior art keywords
parts
lines
arrestor
central tube
gas
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
Application number
GB1413773A
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.)
MO Valve Co Ltd
Original Assignee
MO Valve Co Ltd
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 MO Valve Co Ltd filed Critical MO Valve Co Ltd
Priority to GB1413773A priority Critical patent/GB1410836A/en
Priority to US453325A priority patent/US3896343A/en
Priority to DE2413571A priority patent/DE2413571A1/en
Priority to FR7409994A priority patent/FR2222744B1/fr
Publication of GB1410836A publication Critical patent/GB1410836A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
    • 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
    • H01H37/767—Normally open
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/70—Insulation of connections
    • H01R4/72—Insulation of connections using a heat shrinking insulating sleeve
    • H01R4/723—Making a soldered electrical connection simultaneously with the heat shrinking
    • 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
    • H01H2037/768—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material characterised by the composition of the fusible material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)
  • Thermistors And Varistors (AREA)

Abstract

1410836 Spark gaps M-O VALVE CO Ltd 21 March 1974 [23 March 1973] 14137/73 Heading H1D A spark-gap arrestor comprises metal endcaps 1, 2, a metal central tube 3 and ceramic parts 4, 5, assembled to make up a gas-tight cylinder. Electrodes 6, 7 are brazed to the end caps, and electrode 6 has an opening, subsequently sealed at 10, for filling the arrestor with gas. In use, the end caps 1, 2 are connected respectively to two lines of an electrical supply, and the central tube 3 is earthed. When overvoltage occurs between the lines or between a line and earth, a spark gap breaks down. Since the arrester may fail without giving any indication, there is provided at each end a pair of ring-shaped members 13, made of a fusible material, (e.g. an alloy of 3 parts Su and 2 parts Pb) and shouldered at 14 to support a ceramic cylindrical spacer 15. These parts are covered by a sleeve 16 made of a material which shrinks when heated. If the arrestor is overheated, a hole may form in the tube 3 so that the gas escapes and the device cannot conduct. Before this can occur, the members 13 melt. Sleeves 16 contract so as to cause the molten material to flow between the end cap 1 or 2 and the central tube 3, so that one of the lines is earthed.
GB1413773A 1973-03-23 1973-03-23 Heat-operated short-circuiting arrangements Expired GB1410836A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB1413773A GB1410836A (en) 1973-03-23 1973-03-23 Heat-operated short-circuiting arrangements
US453325A US3896343A (en) 1973-03-23 1974-03-21 Heat-operated short-circuiting arrangements
DE2413571A DE2413571A1 (en) 1973-03-23 1974-03-21 HEAT-ACTUATED SHORT CIRCUIT DEVICE
FR7409994A FR2222744B1 (en) 1973-03-23 1974-03-22

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1413773A GB1410836A (en) 1973-03-23 1973-03-23 Heat-operated short-circuiting arrangements

Publications (1)

Publication Number Publication Date
GB1410836A true GB1410836A (en) 1975-10-22

Family

ID=10035676

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1413773A Expired GB1410836A (en) 1973-03-23 1973-03-23 Heat-operated short-circuiting arrangements

Country Status (4)

Country Link
US (1) US3896343A (en)
DE (1) DE2413571A1 (en)
FR (1) FR2222744B1 (en)
GB (1) GB1410836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186738A (en) * 1986-02-14 1987-08-19 M O Valve Co Ltd Fail safe surge arrester

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4056840A (en) * 1976-05-12 1977-11-01 Reliable Electric Company Line protector for communications circuit
US4063127A (en) * 1976-06-21 1977-12-13 International Standard Electric Corporation Overload protection tube
US4062054A (en) * 1976-08-31 1977-12-06 Tii Corporation Multi-function fail-safe arrangements for overvoltage gas tubes
US4212047A (en) * 1976-08-31 1980-07-08 Tii Corporation Fail-safe/surge arrester systems
US4188561A (en) * 1977-01-14 1980-02-12 Joslyn Mfg. And Supply Co. Station protector spark gap applique
US4275432A (en) * 1978-02-16 1981-06-23 Tii Corporation Thermal switch short circuiting device for arrester systems
EP0026861A1 (en) * 1979-10-03 1981-04-15 Cerberus Ag Arrangement for protection against overvoltage
US4319300A (en) * 1979-11-13 1982-03-09 Tii Industries, Inc. Surge arrester assembly
DE3601307A1 (en) * 1986-01-17 1987-07-23 Siemens Ag Safety system against overtemperatures of live electrical conductors
US4707762A (en) * 1986-05-13 1987-11-17 Nerses Nick Yapoujian Surge protection device for gas tube
DE3734214A1 (en) * 1987-10-09 1989-04-20 Dehn & Soehne Arrangement for disconnecting a varistor
JP2718169B2 (en) * 1989-04-24 1998-02-25 松下電器産業株式会社 Surge absorber with security function
DE4118738C1 (en) * 1991-06-05 1992-12-24 Krone Ag, 1000 Berlin, De
DE4124321C2 (en) * 1991-07-23 2003-10-09 Dehn & Soehne Arrangement for the derivation of overvoltages
US5557250A (en) * 1991-10-11 1996-09-17 Raychem Corporation Telecommunications terminal block
US5423694A (en) * 1993-04-12 1995-06-13 Raychem Corporation Telecommunications terminal block
US5742223A (en) * 1995-12-07 1998-04-21 Raychem Corporation Laminar non-linear device with magnetically aligned particles
US5781394A (en) * 1997-03-10 1998-07-14 Fiskars Inc. Surge suppressing device
FR3099286B1 (en) * 2019-07-24 2021-10-01 Safran Aircraft Engines THERMAL SWITCH FOR AN ELECTRICAL CIRCUIT OF AN AIRCRAFT OR AIRCRAFT ENGINE

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL295669A (en) * 1962-07-23
GB1021782A (en) * 1964-01-07 1966-03-09 Ass Elect Ind Improvements relating to excess voltage protectors
FR1469017A (en) * 1965-12-03 1967-02-10 Ind D Soule Ets Surge protection
US3564473A (en) * 1967-11-21 1971-02-16 Joslyn Mfg & Supply Co Surge protector
US3522570A (en) * 1968-04-08 1970-08-04 Ajr Electronics Corp Fail-safe over-voltage protector
DE2060388B2 (en) * 1970-12-08 1977-05-26 Siemens AG, 1000 Berlin und 8000 München SURGE ARRESTER WITH MULTIPLE ELECTRODES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2186738A (en) * 1986-02-14 1987-08-19 M O Valve Co Ltd Fail safe surge arrester

Also Published As

Publication number Publication date
FR2222744B1 (en) 1978-07-28
US3896343A (en) 1975-07-22
DE2413571A1 (en) 1974-10-03
FR2222744A1 (en) 1974-10-18

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee