GB553461A - Improvements in or relating to electric protective discharge devices - Google Patents

Improvements in or relating to electric protective discharge devices

Info

Publication number
GB553461A
GB553461A GB642542A GB642542A GB553461A GB 553461 A GB553461 A GB 553461A GB 642542 A GB642542 A GB 642542A GB 642542 A GB642542 A GB 642542A GB 553461 A GB553461 A GB 553461A
Authority
GB
United Kingdom
Prior art keywords
relating
granules
electrode
discharge devices
electric protective
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
GB642542A
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.)
Cutler Hammer Europe Ltd
Original Assignee
Igranic Electric 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 Igranic Electric Co Ltd filed Critical Igranic Electric Co Ltd
Priority to GB642542A priority Critical patent/GB553461A/en
Publication of GB553461A publication Critical patent/GB553461A/en
Expired 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
    • H01C7/10—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Lasers (AREA)

Abstract

553,461. Protective devices. IGRANIC ELECTRIC CO., Ltd., and RANDALL, C. E. May 12, 1942, No. 6425. [Class 38 (iv)] [Also in Group XXXVII] A leakage path for the discharge of high potentials suitable for example for connection across an inductive device to reduce the induced voltage when the circuit is broken as in Specification 548,345 consists of granules of tungsten or molybdenum mixed with glass whereby a great number of small gaps is formed. The mixture is contained in a metal cylinder (with an electrode 7) the ends of the cylinder being closed by insulating end plates held together by a bolt 3 which constitutes the other electrode. The granules may be in oil or a gaseous medium.
GB642542A 1942-05-12 1942-05-12 Improvements in or relating to electric protective discharge devices Expired GB553461A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB642542A GB553461A (en) 1942-05-12 1942-05-12 Improvements in or relating to electric protective discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB642542A GB553461A (en) 1942-05-12 1942-05-12 Improvements in or relating to electric protective discharge devices

Publications (1)

Publication Number Publication Date
GB553461A true GB553461A (en) 1943-05-21

Family

ID=9814254

Family Applications (1)

Application Number Title Priority Date Filing Date
GB642542A Expired GB553461A (en) 1942-05-12 1942-05-12 Improvements in or relating to electric protective discharge devices

Country Status (1)

Country Link
GB (1) GB553461A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324793A (en) * 1965-04-29 1967-06-13 Detoronics Corp Transmission line type surge attenuator for transient voltage and current impulses
US4365282A (en) * 1980-02-14 1982-12-21 The United States Of America As Represented By The United States Department Of Energy Overvoltage protector using varistor initiated arc
US4805064A (en) * 1985-09-02 1989-02-14 Bbc Brown, Boveri & Company, Ltd. Lightning arrester having a housing with a high filler content

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3324793A (en) * 1965-04-29 1967-06-13 Detoronics Corp Transmission line type surge attenuator for transient voltage and current impulses
US4365282A (en) * 1980-02-14 1982-12-21 The United States Of America As Represented By The United States Department Of Energy Overvoltage protector using varistor initiated arc
US4805064A (en) * 1985-09-02 1989-02-14 Bbc Brown, Boveri & Company, Ltd. Lightning arrester having a housing with a high filler content

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