AT124537B - Tube rectifier. - Google Patents

Tube rectifier.

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Publication number
AT124537B
AT124537B AT124537DA AT124537B AT 124537 B AT124537 B AT 124537B AT 124537D A AT124537D A AT 124537DA AT 124537 B AT124537 B AT 124537B
Authority
AT
Austria
Prior art keywords
molybdenum
compounds
tube rectifier
tube
emission
Prior art date
Application number
Other languages
German (de)
Inventor
August Dr Gehrts
Original Assignee
August Dr Gehrts
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 August Dr Gehrts filed Critical August Dr Gehrts
Application granted granted Critical
Publication of AT124537B publication Critical patent/AT124537B/en

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Description

  

   <Desc/Clms Page number 1> 
 



    Röhrengleichrichter.   



   Die Erfindung bezieht sich auf Röhrengleichrichter, die mit einer Glühkathode aus Molybdän mit Zusätzen von Thor, Uran, Titan oder deren Verbindungen zwecks Erhöhung der Emission arbeiten und bei denen das Entladungsrohr mit einem die Kathode chemisch nicht angreifenden Gas oder Dampf. insbesondere Stickstoff, Argon, Quecksilber od. dgl., gefüllt ist. 



   Bei Verwendung von solchen   Glühkathoden   aus   Molybdän   hat sich nun gezeigt, dass, obgleich der Verdampfungsgeschwindigkeit bei der Betriebstemperatur der Molybdän-Thor-Gleichrichterkathode (rund 1500 ) ausserordentlich klein ist, die Lebensdauer dieser Kathoden durch verhältnismässig grosse   Rekristallisätionsgesehwindigkeit   des thorierten Molybdäns   nachteilig beeinflusst   wird. 



   Diese   Rekristallisationsgesehwindigkeit   des thorierten   Molybdäns   kann   nun   entweder durch ein geeignetes Herstellungsverfahren oder, wie   erfindungsgemäss,   durch Zusätze von Zirkon, Tantal oder Wolfram vorteilhaft verzögert werden. 

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



   <Desc / Clms Page number 1>
 



    Tube rectifier.



   The invention relates to tube rectifiers which work with a hot cathode made of molybdenum with additions of Thor, uranium, titanium or their compounds for the purpose of increasing the emission and in which the discharge tube is supplied with a gas or vapor which does not chemically attack the cathode. in particular nitrogen, argon, mercury or the like. Is filled.



   When using such hot cathodes made of molybdenum it has now been shown that, although the evaporation rate at the operating temperature of the molybdenum Thor rectifier cathode (around 1500) is extremely low, the service life of these cathodes is adversely affected by the relatively high rate of recrystallization of the thoriated molybdenum.



   This rate of recrystallization of the thoriated molybdenum can now be advantageously delayed either by a suitable manufacturing process or, as in accordance with the invention, by adding zirconium, tantalum or tungsten.

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

Claims (1)

PATENT-ANSPRUCH : Röhrengleichrichter mit Glühkathode aus einer Legierung oder Verbindungen von Molybdän und einer die Elektronenemission erhöhenden Substanz, wie Thor, Uran, Titan bzw. deren Verbindungen, und einer Füllung mit Edelgas oder Quecksilberdampf, dadurch gekennzeichnet, dass dem mit emissionserhöhenden Substanzen versetzten Molybdän Zirkon, Tantal oder Wolfram zugesetzt sind. die die Rekri- EMI1.1 **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Tube rectifier with a hot cathode made of an alloy or compounds of molybdenum and a substance that increases electron emission, such as thor, uranium, titanium or their compounds, and a filling with noble gas or mercury vapor, characterized in that the molybdenum mixed with emission-increasing substances Zircon, tantalum or tungsten are added. which the recri- EMI1.1 ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT124537D 1927-06-30 1927-06-30 Tube rectifier. AT124537B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT124537T 1927-06-30

Publications (1)

Publication Number Publication Date
AT124537B true AT124537B (en) 1931-09-25

Family

ID=3633910

Family Applications (1)

Application Number Title Priority Date Filing Date
AT124537D AT124537B (en) 1927-06-30 1927-06-30 Tube rectifier.

Country Status (1)

Country Link
AT (1) AT124537B (en)

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