AT38405B - Process for the production of incandescent bodies from tungsten metal. - Google Patents

Process for the production of incandescent bodies from tungsten metal.

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Publication number
AT38405B
AT38405B AT38405DA AT38405B AT 38405 B AT38405 B AT 38405B AT 38405D A AT38405D A AT 38405DA AT 38405 B AT38405 B AT 38405B
Authority
AT
Austria
Prior art keywords
metal
tungstate
production
tungsten metal
brought
Prior art date
Application number
Other languages
German (de)
Original Assignee
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
Priority claimed from DE1906201283D external-priority patent/DE201283C/de
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT38405B publication Critical patent/AT38405B/en

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  • Powder Metallurgy (AREA)

Description

  

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Claims (1)

<Desc/Clms Page number 2> 2. Ausführungsform des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass das Metall-Wolframat in die Form des Glühfadens gebracht, hierauf mit Wasserstoff reduziert und durch Hindurchleiten eines elektrischen Stromes bis zur Vertreibnng des leichter flüchtigen Metalls erhitzt wird. <Desc / Clms Page number 2> 2. Embodiment of the method according to claim 1, characterized in that the metal tungstate is brought into the shape of the filament, then reduced with hydrogen and heated by passing an electric current until the more volatile metal is expelled. 3. Ausführungsform des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass ein Metall-Wolframat verwendet wird, welches nach der Reduktion eine ziehbare Legierung liefert, die durch Ziehen in die Form des fertigen Glühfadens gebracht und durch nachfolgende Erhitzung von dem leichter flüehtigen Metall getrennt werden kann. 3. Embodiment of the method according to claim 1, characterized in that a metal tungstate is used which, after reduction, provides a drawable alloy which is brought into the shape of the finished filament by drawing and separated from the more easily volatile metal by subsequent heating can. 4. Ausführungsform des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass Silber Wolfraniat als Ausgangsmaterial verwendet wird. 4. Embodiment of the method according to claim 1, characterized in that silver wolfranate is used as the starting material. S. Ausführungsform des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, dass dem Wolframat zum Zweck der Herstellung von Legierungen dauernd in dem Faden verbleibende Metalle (Thorium oder Tantal in Metallpulverform oder in Form reduzierbarer Verbindungen) zugesetzt werden. S. Embodiment of the method according to claim 1, characterized in that metals (thorium or tantalum in metal powder form or in the form of reducible compounds) that remain permanently in the thread are added to the tungstate for the purpose of producing alloys.
AT38405D 1906-05-19 1908-01-24 Process for the production of incandescent bodies from tungsten metal. AT38405B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1906201283D DE201283C (en) 1906-05-19

Publications (1)

Publication Number Publication Date
AT38405B true AT38405B (en) 1909-08-25

Family

ID=5765442

Family Applications (1)

Application Number Title Priority Date Filing Date
AT38405D AT38405B (en) 1906-05-19 1908-01-24 Process for the production of incandescent bodies from tungsten metal.

Country Status (1)

Country Link
AT (1) AT38405B (en)

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