GB190819311A - Improved Manufacture of Electric Incandescence Bodies of Tungsten. - Google Patents

Improved Manufacture of Electric Incandescence Bodies of Tungsten.

Info

Publication number
GB190819311A
GB190819311A GB190819311DA GB190819311A GB 190819311 A GB190819311 A GB 190819311A GB 190819311D A GB190819311D A GB 190819311DA GB 190819311 A GB190819311 A GB 190819311A
Authority
GB
United Kingdom
Prior art keywords
tungsten
nickel
tungstate
alloy
vacuum
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
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.)
Siemens and Halske AG
Siemens AG
Original Assignee
Siemens and Halske AG
Siemens AG
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 Siemens and Halske AG, Siemens AG filed Critical Siemens and Halske AG
Application granted granted Critical
Publication of GB190819311A publication Critical patent/GB190819311A/en
Expired legal-status Critical Current

Links

Landscapes

  • Fats And Perfumes (AREA)
  • Powder Metallurgy (AREA)

Abstract

19,311. Siemens & Halske Akt.-Ges. Sept. 26, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Incandescent lamps.-Tungsten incandescencebodies are made from nickel tungstate by reducing it to an alloy or intimate mixture of tungsten and nickel, and subsequently removing the nickel, after working, by passage of current in a vacuum. The tungstate may be mixed with powdered tungsten, or with tungstic acid or a like reducible compound, to obtain a suitably proportioned ductile alloy. This may contain from 5 to 20 per cent of nickel, 12 per cent being preferred. Reduction may be effected by heating in a stream of hydrogen, the temperature being raised to about 1650‹ C. for a short time to form the alloy. If plastic colloidal tungsten compounds such as are described in Specifications Nos. 11,716 and 16,489, A.D. 1907, and No. 11,710, A.D. 1908, are mixed with the tungstate, rods or filaments may be made without any other binder, and, after reduction and sintering, may be drawn or rolled and heated electrically, preferably in a vacuum, to expel the nickel.
GB190819311D 1907-09-26 1908-09-14 Improved Manufacture of Electric Incandescence Bodies of Tungsten. Expired GB190819311A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE190819311X 1907-09-26

Publications (1)

Publication Number Publication Date
GB190819311A true GB190819311A (en) 1908-12-10

Family

ID=32604012

Family Applications (1)

Application Number Title Priority Date Filing Date
GB190819311D Expired GB190819311A (en) 1907-09-26 1908-09-14 Improved Manufacture of Electric Incandescence Bodies of Tungsten.

Country Status (1)

Country Link
GB (1) GB190819311A (en)

Similar Documents

Publication Publication Date Title
US2313070A (en) Metal composition
US3161949A (en) Refractory metal base alloys and method of making same
GB190819311A (en) Improved Manufacture of Electric Incandescence Bodies of Tungsten.
US1732326A (en) Thorium alloy and method of preparing the same
US1110303A (en) Method of manufacturing alloys of tungsten and other highly refractory metals related to it.
US1205080A (en) Process of manufacturing filaments for incandescent electric lamps.
US912245A (en) Solder for incandescent-lamp filaments.
US1733813A (en) Composite body and method of producing the same
US1037268A (en) Process of manufacturing incandescence bodies.
US1026384A (en) Metal filament.
US1759454A (en) Uranium metal and product and process of making the same
US2078609A (en) Reaction product of gallic acid and a soluble tungsten compound and a process of making it
US2289104A (en) Method for the production of hardmetal alloys
US1191552A (en) Making tungsten filaments.
DE194707C (en)
GB190711717A (en) Improved Manufacture of Incandescence Electric Lamp Filaments of Tungsten or Alloys thereof
US874977A (en) Incandescent electric lamp.
US1377982A (en) Manufacture of molybdenum-tungsten alloy
DE628460C (en) High emission cathode
US2140367A (en) Thermionic cathode
GB190819932A (en) Manufacture of Filaments for Electric Incandescence Lamps from Tungsten or Alloys thereof.
US896341A (en) Filament for incandescent lamps.
EP0439776B1 (en) Molybdenum material, in particular for the fabrication of lamps
AT26468B (en) Process for the production of electrical incandescent bodies.
JPH0250187B2 (en)