GB403937A - Improvements relating to electric switches - Google Patents

Improvements relating to electric switches

Info

Publication number
GB403937A
GB403937A GB943932A GB943932A GB403937A GB 403937 A GB403937 A GB 403937A GB 943932 A GB943932 A GB 943932A GB 943932 A GB943932 A GB 943932A GB 403937 A GB403937 A GB 403937A
Authority
GB
United Kingdom
Prior art keywords
tungsten
april
metal
copper
contacts
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
GB943932A
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
Priority to GB943932A priority Critical patent/GB403937A/en
Publication of GB403937A publication Critical patent/GB403937A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)

Abstract

403,937. Contacts for switches. INTERNATIONAL GENERAL ELECTRIC CO., Inc., 120, Broadway, New York, U.S.A.- (Assignees of Allgemeine Elektricitats-Ges. ; 2, Friedrich Karl-Ufer, Berlin). April 1, 1932, No. 9439. Void [Abridged as open to inspection under Sect. 91 of the Acts, April 2, 1932]. [Class 38 (v).] Switch contacts are formed of metal of high conductivity e.g. copper with difficultly-fusible metal such as tungsten, tantallum and chromium in pulverulent form rolled or hammered into the contact surfaces. Or the tungsten &c. may be added in powder form to the molten high conductive metal and the contact made from the alloy. The arc produced at the first switchings burns away the surface copper leaving a surface of tungsten &c.
GB943932A 1932-04-01 1932-04-01 Improvements relating to electric switches Expired GB403937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB943932A GB403937A (en) 1932-04-01 1932-04-01 Improvements relating to electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB943932A GB403937A (en) 1932-04-01 1932-04-01 Improvements relating to electric switches

Publications (1)

Publication Number Publication Date
GB403937A true GB403937A (en) 1934-01-04

Family

ID=9871982

Family Applications (1)

Application Number Title Priority Date Filing Date
GB943932A Expired GB403937A (en) 1932-04-01 1932-04-01 Improvements relating to electric switches

Country Status (1)

Country Link
GB (1) GB403937A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014110A (en) * 1959-10-29 1961-12-19 Gen Electric Alternating current vacuum circuit interrupter
US3592987A (en) * 1968-03-19 1971-07-13 Westinghouse Electric Corp Gettering arrangements for vacuum-type circuit interrupters comprising fibers of gettering material embedded in a matrix of material of good conductivity
US3818163A (en) * 1966-05-27 1974-06-18 English Electric Co Ltd Vacuum type circuit interrupting device with contacts of infiltrated matrix material

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014110A (en) * 1959-10-29 1961-12-19 Gen Electric Alternating current vacuum circuit interrupter
US3818163A (en) * 1966-05-27 1974-06-18 English Electric Co Ltd Vacuum type circuit interrupting device with contacts of infiltrated matrix material
US3592987A (en) * 1968-03-19 1971-07-13 Westinghouse Electric Corp Gettering arrangements for vacuum-type circuit interrupters comprising fibers of gettering material embedded in a matrix of material of good conductivity

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