AT60149B - Process for the production of drawn metal threads for electric light bulbs from brittle metals. - Google Patents

Process for the production of drawn metal threads for electric light bulbs from brittle metals.

Info

Publication number
AT60149B
AT60149B AT60149DA AT60149B AT 60149 B AT60149 B AT 60149B AT 60149D A AT60149D A AT 60149DA AT 60149 B AT60149 B AT 60149B
Authority
AT
Austria
Prior art keywords
production
metal
brittle
electric light
light bulbs
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
Application filed by Siemens Ag filed Critical Siemens Ag
Application granted granted Critical
Publication of AT60149B publication Critical patent/AT60149B/en

Links

Landscapes

  • Pressure Welding/Diffusion-Bonding (AREA)
  • Metal Extraction Processes (AREA)

Description

  

   <Desc/Clms Page number 1> 
 
 EMI1.1 
 



   Im Stammpatente Nr. 58776 wird ein Verfahren angegeben, bei dem einzelne Teilchen eines spröden Metalles, z. B. Wolfram, mit einem Überzug eines duktilen Metalles in bekannter Weise auf galvanischem oder chemischem Wege versehen werden. Das so hergerichtete Pulver wird z. B. unter Druck in ein   duktiles   Metallrohr fest eingestampft und dann mit diesem Metall   zl1sammengewalzt.   Es hat sich gezeigt, dass es mit Schwierigkeiten verbunden ist, aus einem derartigen Rohr die Luftreste vollkommen zu entfernen. 



   Im Stammpatente ist ferner angegeben worden, wie man die einzelnen Teilchen des spröden Metalles mit einer aus   dul : tilfm Metall   bestehenden Hülle versieht und durch Druck diese Teilchen zu einer   zusammen 11ldgenden Masse   vereinigt. Hiebei werden die einzelnen Teilchen des spröden Metalles mit einer Schicht des duktilen Metalles, am besten auf galvanischem oder chemischem Wege ganz oder teilweise überzogen. Es hat sich nun gezeigt, dass man bei geeigneter Bemessung der Menge des duktilen Metalles eine derartig gewonnene Masse, gegebenenfalls unter gleichzeitiger   Erlutzung   durch direktes Walzen weiter 
 EMI1.2 
 stellung von Glühkörpern für elektrische Glühlampen sehr geeignetes Arbeitsstück. 



   Durch dieses Verfahren kommt man mit geringen Mengen des Hilfsmetalles aus und es ist möglich, bei der Herstellung des Überzuges die erforderliche Menge des duktilen Metalles genau zu bestimmen. Gegenüber dem Verfahren mit dem duktilen Rohr bietet dieses Verfahren den Vorteil   einer sehr viel innigeren Verbindung   zwischen dem spröden Kernmaterial und dem duktilen Metallüberzug. Es lässt sich nach dieser Methode ein sehr gleichmässiges Endprodukt herstellen und ein sicheres Arbeiten ist   möglich.   



   Die Entfernung des   Hilfsmetalles   geschieht in bekannter Weise entweder durch Schmelzen oder auf   mechanischem   oder auf chemischem Wege, nachdem der   Walzprozess   genügend lange fortgesetzt worden ist. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 
 EMI1.1
 



   In parent patent no. 58776 a method is given in which individual particles of a brittle metal, e.g. B. tungsten, be provided with a coating of a ductile metal in a known manner by galvanic or chemical means. The powder prepared in this way is z. B. firmly rammed into a ductile metal pipe under pressure and then rolled together with this metal. It has been found that it is difficult to completely remove the air residues from such a pipe.



   In the parent patent it was also indicated how the individual particles of the brittle metal are provided with a shell made of thin metal and how these particles are united by pressure to form a mass. In doing so, the individual particles of the brittle metal are completely or partially coated with a layer of the ductile metal, ideally by galvanic or chemical means. It has now been shown that if the amount of ductile metal is suitably dimensioned, a mass obtained in this way can be continued, possibly with simultaneous use by direct rolling
 EMI1.2
 Position of incandescent bodies for electric light bulbs very suitable work piece.



   This process makes do with small amounts of the auxiliary metal and it is possible to precisely determine the required amount of ductile metal when producing the coating. Compared to the process with the ductile pipe, this process offers the advantage of a much more intimate connection between the brittle core material and the ductile metal coating. With this method, a very uniform end product can be produced and safe working is possible.



   The auxiliary metal is removed in a known manner either by melting or by mechanical or chemical means, after the rolling process has been continued for a sufficiently long time.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

 

Claims (1)

PATENT-ANSPRUCH: Verfahren zur Herstellung von gezogenen Metallfäden für elektrische Glühlampen aus spröden Metallen durch Verwendung einer Masse, die auf dem Wege gewonnen wird, dass die einzelnen Teilchen des spröden Metalles mit Teilchen eines duktilen Metalles in bekannter Weise auf galvanischem oder chemischem Wege ganz oder teilweise überzogen und durch Druck vereinigt worden sind, dadurch gekennzeichnet, dass die so gebildete Masse durch unmittelbares Walzen weiterverarbeitet wird. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the production of drawn metal threads for electric incandescent lamps from brittle metals by using a mass which is obtained by the individual particles of the brittle metal being completely or partially coated with particles of a ductile metal in a known manner by galvanic or chemical means and through Pressure have been combined, characterized in that the mass thus formed is further processed by direct rolling. ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT60149D 1908-11-30 1908-11-30 Process for the production of drawn metal threads for electric light bulbs from brittle metals. AT60149B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT60149T 1908-11-30
AT58776T 1908-11-30

Publications (1)

Publication Number Publication Date
AT60149B true AT60149B (en) 1913-07-10

Family

ID=25602594

Family Applications (1)

Application Number Title Priority Date Filing Date
AT60149D AT60149B (en) 1908-11-30 1908-11-30 Process for the production of drawn metal threads for electric light bulbs from brittle metals.

Country Status (1)

Country Link
AT (1) AT60149B (en)

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