GB931528A - Improvements relating to electrical switch contacts - Google Patents

Improvements relating to electrical switch contacts

Info

Publication number
GB931528A
GB931528A GB512461A GB512461A GB931528A GB 931528 A GB931528 A GB 931528A GB 512461 A GB512461 A GB 512461A GB 512461 A GB512461 A GB 512461A GB 931528 A GB931528 A GB 931528A
Authority
GB
United Kingdom
Prior art keywords
mould
copper
graphite
container
tip
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
GB512461A
Inventor
Frank Waterton
Denzil Malcolm Atkinson
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.)
Associated Electrical Industries Ltd
Original Assignee
Associated Electrical Industries 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 Associated Electrical Industries Ltd filed Critical Associated Electrical Industries Ltd
Priority to GB512461A priority Critical patent/GB931528A/en
Publication of GB931528A publication Critical patent/GB931528A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01HELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00Contacts
    • H01H1/02Contacts characterised by the material thereof
    • H01H1/0203Contacts characterised by the material thereof specially adapted for vacuum switches

Landscapes

  • Crucibles And Fluidized-Bed Furnaces (AREA)

Abstract

931,528. Casting composite articles. ASSOCIATED ELECTRICAL INDUSTRIES Ltd. Feb. 9, 1962 [Feb. 10, 1961], No. 5124/61. Class 83 (1). An electrical switch contact comprises a metal body cast directly on to a refractory metal tip in a vacuum. A molybdenum or tungsten tip 21 is located within a graphite container 1 by a graphite ring 22 beneath a graphite two-piece mould 5, 6 located within the container by pins 11. The space above the mould forms a reservoir for molten copper 24 which flows into the mould through a gate 8. The upper part of the container is surrounded by a polished molybdenum sheet 16 which together with the greater thickness of the wall portion 15 reduces heat loss therefrom so that the copper solidifies from the bottom of the mould upwardly. When an alloy of copper and 0.6% Cr is used for the contact body, those parts of the mould which come into contact with it are made of pyrophyllite. Solid copper is placed in the container which is then placed in a vacuum in a radiation or induction furnace to melt the copper. In a modification the molten copper from the reservoir 12 flows through feed holes in a graphite plate to mould cavities in a lower graphite block in each of which cavities a tip is located. After casting each contact body is detached by breaking the small neck extending through the corresponding feed hole.
GB512461A 1961-02-10 1961-02-10 Improvements relating to electrical switch contacts Expired GB931528A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB512461A GB931528A (en) 1961-02-10 1961-02-10 Improvements relating to electrical switch contacts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB512461A GB931528A (en) 1961-02-10 1961-02-10 Improvements relating to electrical switch contacts

Publications (1)

Publication Number Publication Date
GB931528A true GB931528A (en) 1963-07-17

Family

ID=9790161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB512461A Expired GB931528A (en) 1961-02-10 1961-02-10 Improvements relating to electrical switch contacts

Country Status (1)

Country Link
GB (1) GB931528A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905726A2 (en) * 1997-09-19 1999-03-31 Hitachi, Ltd. Vacuum circuit breaker, vacuum bulb and electrode assembly used therefor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0905726A2 (en) * 1997-09-19 1999-03-31 Hitachi, Ltd. Vacuum circuit breaker, vacuum bulb and electrode assembly used therefor
EP0905726A3 (en) * 1997-09-19 1999-11-17 Hitachi, Ltd. Vacuum circuit breaker, vacuum bulb and electrode assembly used therefor
US6248969B1 (en) 1997-09-19 2001-06-19 Hitachi, Ltd. Vacuum circuit breaker, and vacuum bulb and vacuum bulb electrode used therefor

Similar Documents

Publication Publication Date Title
GB853855A (en) Mold for continuously casting metals
GB1344421A (en) Electroslag remelting of titanium and/or alloys thereof
GB1127708A (en) Improvements relating to vacuum-casting
GB931528A (en) Improvements relating to electrical switch contacts
ES266011U (en) A vessel for molten metal.
GB1169071A (en) Improvements relating to Electroslag Ingot Production
GB1161873A (en) Improved Method of Manufacturing Steel and Alloys of Iron in the Arc Furnace.
GB1351422A (en) Water cooling system of a vacuum arc furnace
GB1256194A (en) Apparatus for electro-slag remelting
GB1375067A (en)
GB1326579A (en) Apparatus for electroslag remelting of metals
GB1130592A (en) Improvements in or relating to continuous casting
GB1166199A (en) Apparatus for use in melting and casting metals.
GB1209197A (en) A process and plant for the production of metal castings
GB1405471A (en) Mould for electroslag remelting furnace
GB1219544A (en) Improvements in or relating to the electro-slag refining of metals
GB1265558A (en)
ES8404806A1 (en) Process and installation for charging a metallic alloys smelt furnace for feeding foundry moulds.
GB1014508A (en) Improvements relating to electrical switch contacts
GB1058172A (en) Continuous casting mould for the continuous casting of high-melting point metals
GB1172042A (en) Apparatus for the Electroslag Remelting of Metallic Consumable Electrodes
GB1426866A (en) Continuous casting mould and feed tube
GB1527572A (en) Electroslag casting of arcuate blanks
GB1355264A (en) Electroslag remelting apparatus for making ingots of metal
GB1173693A (en) Improvements in and relating to a method of Electro-slag Refining