GB1213759A - Improvements in vacuum-type circuit interrupter with contacts containing a refractory metal - Google Patents

Improvements in vacuum-type circuit interrupter with contacts containing a refractory metal

Info

Publication number
GB1213759A
GB1213759A GB46219/69A GB4621969A GB1213759A GB 1213759 A GB1213759 A GB 1213759A GB 46219/69 A GB46219/69 A GB 46219/69A GB 4621969 A GB4621969 A GB 4621969A GB 1213759 A GB1213759 A GB 1213759A
Authority
GB
United Kingdom
Prior art keywords
metal
vacuum
alloy
type circuit
circuit interrupter
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
GB46219/69A
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 GB1213759A publication Critical patent/GB1213759A/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
    • H01H1/0203—Contacts characterised by the material thereof specially adapted for vacuum switches

Landscapes

  • High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
  • Contacts (AREA)

Abstract

1,213,759. Vacuum switch contacts. GENERAL ELECTRIC CO. 19 Sept., 1969 [27 Sept., 1968], No. 46219/69. Heading H1N. Each of the pair of contacts 17, 18 within a highly evacuated envelope of a vacuum-type circuit interrupter comprises a porous matrix of a refractory metal e.g. tungsten or molybdenum combined with an alloy of copper and bismuth, the bismuth being less than 2% by weight of the alloy. The interrupter comprises a tubular casing 12 of insulating material sealed with a pair of metal end caps 13, 14. Fixed contact 17 is brazed to a contact rod 17a, and movable contact 18 brazed to rod 18a which moves through an opening in the lower end cap, sealed by a flexible metal bellows 20. The alloy composition reduces contact welding while a metal shield 21 condenses any metal vapours generated by the arc.
GB46219/69A 1968-09-27 1969-09-19 Improvements in vacuum-type circuit interrupter with contacts containing a refractory metal Expired GB1213759A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76311668A 1968-09-27 1968-09-27

Publications (1)

Publication Number Publication Date
GB1213759A true GB1213759A (en) 1970-11-25

Family

ID=25066919

Family Applications (1)

Application Number Title Priority Date Filing Date
GB46219/69A Expired GB1213759A (en) 1968-09-27 1969-09-19 Improvements in vacuum-type circuit interrupter with contacts containing a refractory metal

Country Status (4)

Country Link
US (1) US3596025A (en)
DE (1) DE1948451A1 (en)
FR (1) FR2019077A1 (en)
GB (1) GB1213759A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3805000A (en) * 1970-03-23 1974-04-16 Itt Vacuum interrupter and methods of making contacts therefor
JPS5341782B2 (en) * 1973-05-19 1978-11-07
US4399339A (en) * 1981-03-02 1983-08-16 Cherry Electrical Products Corporation Electrical contact
JPS60172117A (en) * 1984-02-17 1985-09-05 三菱電機株式会社 Contact for vacuum breaker
US5852266A (en) * 1993-07-14 1998-12-22 Hitachi, Ltd. Vacuum circuit breaker as well as vacuum valve and electric contact used in same
JP2874522B2 (en) * 1993-07-14 1999-03-24 株式会社日立製作所 Vacuum circuit breaker, vacuum valve used therefor, electrode for vacuum valve, and method of manufacturing the same

Also Published As

Publication number Publication date
US3596025A (en) 1971-07-27
DE1948451A1 (en) 1970-04-09
FR2019077A1 (en) 1970-06-26

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PLNP Patent lapsed through nonpayment of renewal fees