GB874215A - Improvements in electric overvoltage discharge device - Google Patents

Improvements in electric overvoltage discharge device

Info

Publication number
GB874215A
GB874215A GB35809/59A GB3580959A GB874215A GB 874215 A GB874215 A GB 874215A GB 35809/59 A GB35809/59 A GB 35809/59A GB 3580959 A GB3580959 A GB 3580959A GB 874215 A GB874215 A GB 874215A
Authority
GB
United Kingdom
Prior art keywords
radioactivity
insulator
nickel
gas
cap
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
GB35809/59A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB874215A publication Critical patent/GB874215A/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
    • H01T4/00—Overvoltage arresters using spark gaps
    • H01T4/10—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel
    • H01T4/12—Overvoltage arresters using spark gaps having a single gap or a plurality of gaps in parallel hermetically sealed

Landscapes

  • Emergency Protection Circuit Devices (AREA)

Abstract

874,215. Spark apparatus. GENERAL ELECTRIC CO. Oct. 22, 1959 [Oct. 24, 1958], No. 35809/59. Class 39(1). A protective spark gap for an electrical circuit comprises two electrodes 11, 14 presenting curved surfaces 12, 13 towards each other, has an inert ionizable gas filling of e.g. argon or helium at a pressure of 0.01 to 2500 mm. Hg., and has a source of radioactivity for ionizing the gas at a level below that obtaining upon breakdown of the gap. The source of radioactivity may be an annular strip 23 of Nickel-63, Nickel-63 and Cobalt-60 or Nickel-63 plated on copper, or the radioactivity may be provided by the addition to the filling of a radioactive gas e.g. Krypton-85. The Krypton-85 is also stated to be effective in inhibiting anchoring of the arc. The upper electrode 11 is supported by a rod 8 passing through an insulator 3. The cap 5 is bonded to the insulator by means of a ceramic-tometal bond 6 and the cap 5 places the seal in compression. The similar seal 17 between the insulator and the casing 15 is also maintained in a state of compression. The exhaust and gas introducing tube 20 has a protective cap 21 containing a quantity of soft solder.
GB35809/59A 1958-10-24 1959-10-22 Improvements in electric overvoltage discharge device Expired GB874215A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US874215XA 1958-10-24 1958-10-24

Publications (1)

Publication Number Publication Date
GB874215A true GB874215A (en) 1961-08-02

Family

ID=22205091

Family Applications (1)

Application Number Title Priority Date Filing Date
GB35809/59A Expired GB874215A (en) 1958-10-24 1959-10-22 Improvements in electric overvoltage discharge device

Country Status (1)

Country Link
GB (1) GB874215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516856B1 (en) * 1969-09-02 1976-03-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516856B1 (en) * 1969-09-02 1976-03-02

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