GB1376149A - Self-recovering current limiter - Google Patents

Self-recovering current limiter

Info

Publication number
GB1376149A
GB1376149A GB5834671A GB5834671A GB1376149A GB 1376149 A GB1376149 A GB 1376149A GB 5834671 A GB5834671 A GB 5834671A GB 5834671 A GB5834671 A GB 5834671A GB 1376149 A GB1376149 A GB 1376149A
Authority
GB
United Kingdom
Prior art keywords
tube
self
flanges
electrodes
insulating
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
GB5834671A
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Publication of GB1376149A publication Critical patent/GB1376149A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H87/00—Protective devices in which a current flowing through a liquid or solid is interrupted by the evaporation of the liquid or by the melting and evaporation of the solid when the current becomes excessive, the circuit continuity being reestablished on cooling

Landscapes

  • Thermistors And Varistors (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Fuses (AREA)

Abstract

1376149 Conducting-liquid switches MITSUBISHI DENKI KK 15 Dec 1971 [16 Dec 1970] 58346/71 Heading H1N A self-recovering current limiter comprises an outer tube having an internal flange 3a adjacent each end, an inner tube including electrodes 1, 4 separated by an insulating tube 2, the inner tube having external flanges 1a, 4a whose outer diameter is larger than the inner diameter of flanges 3a, insulating material 5 packed between the inner and outer tubes, and a self-recovering current limiting material 2a providing a conductive path between electrodes 1, 4. Current limiting material 2a is sodium, potassium or mixtures of sodium and potassium. When the current reaches a predetermined level, material 2a evaporates, and after a specific period material 2a liquifies again. Electrodes 1, 4 are of copper or a copper alloy, tube 2 is of material such as beryllia porcelain or alumina porcelain, insulating material 5 is a glassy mica composition and the outer tube is of a non-magnetic metallic material such as stainless steel or a high tensile brass. A buffer 7, 0-ring 7a and a spring 8 allow for the expansion of material 2a which is inserted through a needle valve 6. In a second embodiment, Figs. 5, 6 (not shown), the flanges are formed by snap rings. Reference has been directed by the Comptroller to Specification 1,214,711.
GB5834671A 1970-12-16 1971-12-15 Self-recovering current limiter Expired GB1376149A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP45112681A JPS5024013B1 (en) 1970-12-16 1970-12-16

Publications (1)

Publication Number Publication Date
GB1376149A true GB1376149A (en) 1974-12-04

Family

ID=14592798

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5834671A Expired GB1376149A (en) 1970-12-16 1971-12-15 Self-recovering current limiter

Country Status (6)

Country Link
US (1) US3747040A (en)
JP (1) JPS5024013B1 (en)
DE (1) DE2162269C3 (en)
FR (1) FR2118130B1 (en)
GB (1) GB1376149A (en)
IT (1) IT943975B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH560462A5 (en) * 1973-01-25 1975-03-27 Mitsubishi Electric Corp
JPS5515826B2 (en) * 1973-02-12 1980-04-26
US3806855A (en) * 1973-04-30 1974-04-23 Gen Electric Vapor state current limiting device
US3902150A (en) * 1973-06-08 1975-08-26 Mitsubishi Electric Corp Self-restoring type current limiting device
US4024488A (en) * 1975-12-17 1977-05-17 Terasaki Denki Sangyo Kabushiki Kaisha Self-restoring type current limiting device
DE2937490A1 (en) * 1979-09-17 1981-04-02 Siemens AG, 1000 Berlin und 8000 München CURRENT LIMITERS
US5051649A (en) * 1989-09-08 1991-09-24 John F. Waymouth Intellectual Property And Education Trust Arc discharge lamp with liquid metal and heating means

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3513426A (en) * 1968-02-29 1970-05-19 Mitsubishi Electric Corp Current limiting device
US3644860A (en) * 1969-04-24 1972-02-22 Mitsubishi Electric Corp Self-restoring current limiter

Also Published As

Publication number Publication date
DE2162269A1 (en) 1973-06-20
DE2162269B2 (en) 1973-09-27
IT943975B (en) 1973-04-10
DE2162269C3 (en) 1974-04-18
FR2118130A1 (en) 1972-07-28
US3747040A (en) 1973-07-17
FR2118130B1 (en) 1976-04-16
JPS5024013B1 (en) 1975-08-12

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee