AT157854B - Rod-shaped electrical heating element for generating high temperatures. - Google Patents

Rod-shaped electrical heating element for generating high temperatures.

Info

Publication number
AT157854B
AT157854B AT157854DA AT157854B AT 157854 B AT157854 B AT 157854B AT 157854D A AT157854D A AT 157854DA AT 157854 B AT157854 B AT 157854B
Authority
AT
Austria
Prior art keywords
heating element
rod
high temperatures
electrical heating
generating high
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 AT157854B publication Critical patent/AT157854B/en

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  • Resistance Heating (AREA)

Description

  

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  Stabförmiges elektrisches Heizelement zur Erzeugung hoher Temperaturen. 
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 auch gut gekühlt werden können, insbesondere indem man ein flüssiges oder gasförmiges Kühlmittel an ihnen vorbei bewegt. 



   PATENT-ANSPRÜCHE :
1. Stabförmiges elektrisches Heizelement zur Erzeugung hoher Temperaturen, insbesondere in elektrischen Ofen, dessen aus Wolfram, Molybdän oder einem andern, ähnlich hochschmelzenden Widerstandsmaterial bestehender Heizleiter in einer gegen den Aussenraum abgeschlossenen rohrförmigen keramischen Umhüllung in indifferenter Atmosphäre oder im Vakuum angeordnet ist, dadurch gekennzeichnet, dass die zur Herstellung des keramischen Rohres verwendete Masse Aluminiumsilikate   und/oder   Magnesiumsilikate enthält und dass die Rohrenden durch Metallkappen verschlossen sind, die unter Verwendung eines Hartlots mit dem keramischen Rohr vakuumdicht verbunden sind.



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  Rod-shaped electrical heating element for generating high temperatures.
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 can also be cooled well, in particular by moving a liquid or gaseous coolant past them.



   PATENT CLAIMS:
1. Rod-shaped electrical heating element for generating high temperatures, in particular in an electric furnace, whose heating conductor, made of tungsten, molybdenum or another similar high-melting resistance material, is arranged in a tubular ceramic envelope closed off from the exterior in an inert atmosphere or in a vacuum, characterized in that that the mass used to manufacture the ceramic pipe contains aluminum silicates and / or magnesium silicates and that the pipe ends are closed by metal caps which are connected to the ceramic pipe in a vacuum-tight manner using a hard solder.

Claims (1)

2. Heizelement nach Anspruch 1, dadurch gekennzeichnet, dass der Heizwiderstand aus einem Silitstab besteht und mindestens eine der das keramische Rohr abschliessenden Metallkappen ein federndes Glied aufweist, das eine Wärmeausdehnung des Widerstandes in axialer Richtung gestattet. 2. Heating element according to claim 1, characterized in that the heating resistor consists of a silicon rod and at least one of the metal caps closing off the ceramic tube has a resilient member which allows thermal expansion of the resistor in the axial direction. 3. Verfahren zur Herstellung von Widerständen nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die keramische Umhüllung an den Enden vor dem Auflöten der metallenen Verschlüsse metallisiert wird. 3. A method for producing resistors according to claim 1 or 2, characterized in that the ceramic envelope is metallized at the ends before the metal closures are soldered on. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, dass zur Metallisierung hochschmelzende unedle Metalle in fein verteilter Form, beispielsweise nach dem Karbonylverfahren hergestelltes Eisenpulver, verwendet werden. EMI3.1 4. The method according to claim 3, characterized in that high-melting base metals in finely divided form, for example iron powder produced by the carbonyl process, are used for metallization. EMI3.1
AT157854D 1936-04-02 1936-09-26 Rod-shaped electrical heating element for generating high temperatures. AT157854B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE157854T 1936-04-02

Publications (1)

Publication Number Publication Date
AT157854B true AT157854B (en) 1940-02-10

Family

ID=29412934

Family Applications (1)

Application Number Title Priority Date Filing Date
AT157854D AT157854B (en) 1936-04-02 1936-09-26 Rod-shaped electrical heating element for generating high temperatures.

Country Status (1)

Country Link
AT (1) AT157854B (en)

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