GB1397865A - Tungsten incandescent body containing dopant substances and procedure for its preparation - Google Patents

Tungsten incandescent body containing dopant substances and procedure for its preparation

Info

Publication number
GB1397865A
GB1397865A GB1119873A GB1119873A GB1397865A GB 1397865 A GB1397865 A GB 1397865A GB 1119873 A GB1119873 A GB 1119873A GB 1119873 A GB1119873 A GB 1119873A GB 1397865 A GB1397865 A GB 1397865A
Authority
GB
United Kingdom
Prior art keywords
procedure
preparation
body containing
containing dopant
incandescent body
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
GB1119873A
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.)
Egyesuelt Izzolampa es Villamossagi Rt
Original Assignee
Egyesuelt Izzolampa es Villamossagi Rt
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 Egyesuelt Izzolampa es Villamossagi Rt filed Critical Egyesuelt Izzolampa es Villamossagi Rt
Publication of GB1397865A publication Critical patent/GB1397865A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/04—Incandescent bodies characterised by the material thereof
    • H01K1/10—Bodies of metal or carbon combined with other substance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/24—After-treatment of workpieces or articles
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/045—Alloys based on refractory metals
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
    • C22C27/04—Alloys based on tungsten or molybdenum
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K1/00—Details
    • H01K1/02—Incandescent bodies
    • H01K1/04—Incandescent bodies characterised by the material thereof
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Powder Metallurgy (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

1397865 Electric incandescent lamps EGYESULT IZZOLAMPA ES VILLAMOSSAGI RESZVENYTARSASAG 7 March 1973 [16 March 1972] 11198/73 Heading H1F [Also in Division C7] Filaments of tungsten incandescent lamps are formed by wire-drawing of sintered, recrystallized tungsten containing 0À01 to 100 p.p.m. by weight of beryllium either in elemental form or as a compound in the presence of at least one other dopant, e.g. potassium, aluminium, gallium, or thallium, with the silicon content, as impurity, limited to a maximum of half the beryllium content.
GB1119873A 1972-03-16 1973-03-07 Tungsten incandescent body containing dopant substances and procedure for its preparation Expired GB1397865A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
HUMA2339A HU163582B (en) 1972-03-16 1972-03-16

Publications (1)

Publication Number Publication Date
GB1397865A true GB1397865A (en) 1975-06-18

Family

ID=10998565

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1119873A Expired GB1397865A (en) 1972-03-16 1973-03-07 Tungsten incandescent body containing dopant substances and procedure for its preparation

Country Status (7)

Country Link
US (1) US3853492A (en)
AT (1) AT316686B (en)
DE (1) DE2246092A1 (en)
FR (1) FR2221812B1 (en)
GB (1) GB1397865A (en)
HU (1) HU163582B (en)
NL (1) NL7303655A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2839542B2 (en) * 1989-04-05 1998-12-16 株式会社東芝 Vibration-resistant tungsten wire, filament and halogen bulb using the same
US5019330A (en) * 1990-08-03 1991-05-28 General Electric Company Method of forming improved tungsten ingots
US6129890A (en) * 1999-09-07 2000-10-10 Osram Sylvania Inc. Method of making non-sag tungsten wire
US6165412A (en) * 1999-09-07 2000-12-26 Osram Sylvania Inc. Method of making non-sag tungsten wire for electric lamps

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2948609A (en) * 1960-08-09 Manufacture of metal articles from
US1602526A (en) * 1922-09-15 1926-10-12 Westinghouse Lamp Co Control of crystal development in refractory metals
GB258642A (en) * 1925-06-20 1926-09-20 Edison Swan Electric Co Ltd Improvements in and relating to tungsten wire
GB427757A (en) * 1933-05-19 1935-04-30 Yukitoshi Sakakura Incandescence bodies and methods of making the same for use as filaments of incandescent electric lamps and for other purposes
NL132462C (en) * 1963-09-20
DE1533395A1 (en) * 1966-03-11 1969-12-18 Tokvo Shibaura Electric Co Ltd Tungsten materials with improved flexibility, method of processing them and components made from these materials
US3475159A (en) * 1967-01-16 1969-10-28 Dow Chemical Co Method for preparing tungsten powders doped with refractory metal oxides
US3682720A (en) * 1970-03-19 1972-08-08 Sylvania Electric Prod Manufacture of substantially non-sagging refractory metal wire
US3798008A (en) * 1972-09-12 1974-03-19 Egyesuelt Izzolampa Retentive tungsten body containing 20{14 50 ppm titanium and/or zirconium

Also Published As

Publication number Publication date
HU163582B (en) 1973-09-27
FR2221812B1 (en) 1976-11-05
NL7303655A (en) 1973-09-18
US3853492A (en) 1974-12-10
DE2246092A1 (en) 1973-09-27
AT316686B (en) 1974-07-25
FR2221812A1 (en) 1974-10-11

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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