GB1055538A - Electrical contacts - Google Patents

Electrical contacts

Info

Publication number
GB1055538A
GB1055538A GB17734/64A GB1773464A GB1055538A GB 1055538 A GB1055538 A GB 1055538A GB 17734/64 A GB17734/64 A GB 17734/64A GB 1773464 A GB1773464 A GB 1773464A GB 1055538 A GB1055538 A GB 1055538A
Authority
GB
United Kingdom
Prior art keywords
contact
silver
tungsten
compact
heating
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
GB17734/64A
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.)
Stackpole Carbon Co
Original Assignee
Stackpole Carbon 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 Stackpole Carbon Co filed Critical Stackpole Carbon Co
Publication of GB1055538A publication Critical patent/GB1055538A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
    • C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
    • C22C32/0052—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only carbides
    • 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
    • H01H1/023—Composite material having a noble metal as the basic material
    • 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
    • H01H1/023—Composite material having a noble metal as the basic material
    • H01H1/0233—Composite material having a noble metal as the basic material and containing carbides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Contacts (AREA)

Abstract

1,055,538. Switch contacts. STACKPOLE CARBON CO. April 29, 1964 [Feb. 24, 1964], No. 17734/64. Heading H2B. A silver-tungsten electrical contact is made by firstly mixing finely divided tungsten with a temporary binder, placing the mixture in a mould and subjecting it to high-pressure (2 to 4 tons/sq. in.) to form a compact, heating the compact to a sintering temperature (1500‹ to 1700‹ C.) in a reducing atmosphere while supplying carbon to one side of the contact so that a thin layer of tungsten carbide is formed, and finally placing silver in contact with the compact and heating at 125‹ to, 1600‹ C. in a reducing atmosphere to cause the silver to infiltrate the body of the contact. Silicon, molybdenum or titanium may be used instead of tungsten and the silver may constitute from about 30 to about 65 volume per cent of the contact.
GB17734/64A 1964-02-24 1964-04-29 Electrical contacts Expired GB1055538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US347006A US3225169A (en) 1964-02-24 1964-02-24 Silver-refractory metal electrical contact having refractory metal carbide in the marginal layer of its active contact face

Publications (1)

Publication Number Publication Date
GB1055538A true GB1055538A (en) 1967-01-18

Family

ID=23361949

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17734/64A Expired GB1055538A (en) 1964-02-24 1964-04-29 Electrical contacts

Country Status (2)

Country Link
US (1) US3225169A (en)
GB (1) GB1055538A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3428847A (en) * 1967-02-17 1969-02-18 Webb James E Water cooled contactor for anode in carbon arc mechanism
US3484925A (en) * 1967-05-23 1969-12-23 Kopco Ind Fluid compression technique for molding edm electrodes and other tungsten-based components
US3831270A (en) * 1970-09-28 1974-08-27 Mallory & Co Inc P R Electrical conducting means and method of making same
US5246480A (en) * 1988-04-20 1993-09-21 Siemens Aktiengesellschaft Sintered contact material based on silver for use in power engineering switch-gear, in particular for contact pieces in low-voltage switches
TW200710905A (en) * 2005-07-07 2007-03-16 Hitachi Ltd Electrical contacts for vacuum circuit breakers and methods of manufacturing the same

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2289708A (en) * 1940-08-02 1942-07-14 Square D Co Electrical contact
US2298999A (en) * 1940-08-03 1942-10-13 Square D Co Electrical contact
US2300286A (en) * 1941-05-08 1942-10-27 Fansteel Metallurgical Corp Electrical contact
US2624820A (en) * 1950-01-14 1953-01-06 Metals & Controls Corp Electrical contact
US3026603A (en) * 1958-10-13 1962-03-27 Kelsey Hayes Co Method of making electrical contacts and the like
US3139669A (en) * 1960-02-23 1964-07-07 Gibson Electric Company Method of making an electrical contact

Also Published As

Publication number Publication date
US3225169A (en) 1965-12-21

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