DE615689C - Glow wire for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum devices - Google Patents

Glow wire for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum devices

Info

Publication number
DE615689C
DE615689C DEB138289D DEB0138289D DE615689C DE 615689 C DE615689 C DE 615689C DE B138289 D DEB138289 D DE B138289D DE B0138289 D DEB0138289 D DE B0138289D DE 615689 C DE615689 C DE 615689C
Authority
DE
Germany
Prior art keywords
tubes
electric light
light bulbs
electron
glow wire
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
DEB138289D
Other languages
German (de)
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.)
WILHELM KOOSMANN DR
Original Assignee
WILHELM KOOSMANN DR
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 WILHELM KOOSMANN DR filed Critical WILHELM KOOSMANN DR
Priority to DEB138289D priority Critical patent/DE615689C/en
Application granted granted Critical
Publication of DE615689C publication Critical patent/DE615689C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies

Description

Glühdraht für elektrische Glühlampen, Elektronenröhren, Röntgenröhren und andere elektrische Vakuumapparate Untersucht man mit Hilfe eines Braggschen Röntgenspektrographen und Röntgenrohres mit Wolframglühkathode irgendwelche Präparate, so erhält man auf den Spektralaufnahmen stets iaußer den den Präparaten zugehörigen Röntgenlinien auch. die L-Serie des Wolframs. Diese Erscheinung läßt sich leicht erklären: Das Wolfram des Glühdrahtes verdampft -und schlägt sich teilweise auf der Antikathode nieder, auf die das zu untersuchende Präparat aufgetragen ist, und wird da zur Strahlung durch das Elektronenbombardement angeregt.Filament for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum apparatus. Examined with the help of a Bragg X-ray spectrograph and X-ray tube with tungsten incandescent cathode any preparations, in this way one always receives on the spectral recordings in addition to those associated with the specimens X-ray lines too. the L series of tungsten. This phenomenon can be easily resolved explain: The tungsten of the filament vaporizes and partially opens up the anticathode to which the specimen to be examined is applied, and is there stimulated to radiation by the electron bombardment.

Nun wurde die Beobachtung gemacht, daß auf Spektralaufnahmen von hochprozentigen Rheniumpräparaten (Element 75) die Wolframlinien entweder nur sehr schwach oder gar nicht zu sehen waren. Diese Tatsache ist so zu deuten, daß Rhenium während des Elektronenbombardements vom Brennfleck auf den Wolframglühfaden zerstäubt wird und dadurch das Verdampfen des Wolframs vermindert. Mit diesem Vorgang nimmt übrigens die Elektronenemission des Glühdrahtes ab; denn es war zur Erreichung desselben Elektronenstromes nötig, den Heizstrom der Glühkathode von 5,o auf 5,3 Amp. zu erhöhen. Daß sich Rhenium auf dem Glühdraht niedergeschlagen hat, konnte durch eine röntgenspektroskopische Untersuchung des Glühdrahtes bewiesen werden. Weiterhin ist noch die Tatsache bemerkenswert, da,ß auch auf den Aufnähmen von Präparaten ohne Rhenium, die mit derselben Glühspirale im Anschluß an die obenerwähnten gemacht wurden, die Wolframlinien noch sehr schwach waren. Hieraus ist zu schließen, daß das auf der Wolframspirale vorhandene Rhenium nur sehr langsam wieder verdampft. Aus diesen -experimentellen Befunden geht hervor, daß auf einem Glühdraht aus schwer schmelzbarem Metall niedergeschlagenes Rhenium das Verdampfen oder Zerstäuben des Glühdrahtes stark - vermindert und damit die Lebensdauer desselben erhöht.Now the observation was made that on spectral recordings of high percentage Rhenium preparations (element 75) the tungsten lines either only very weakly or could not be seen at all. This fact is to be interpreted in such a way that rhenium during the Electron bombardment is atomized from the focal point onto the tungsten filament and this reduces the evaporation of the tungsten. Incidentally, this process takes the electron emission of the filament from; for it was to achieve the same Electron current necessary to increase the heating current of the hot cathode from 5. o to 5.3 amps. The fact that rhenium was deposited on the filament could be determined by an X-ray spectroscopy Examination of the glow wire can be proven. Furthermore, the fact is noteworthy there, ß also on the inclusion of preparations without rhenium, those with the same incandescent spiral following the above made, the tungsten lines are still very faint was. From this it can be concluded that the rhenium present on the tungsten spiral evaporated again very slowly. From these experimental findings it follows that that rhenium precipitated on a filament made of difficult-to-melt metal the evaporation or atomization of the filament strongly - reduced and thus the Lifespan of the same increased.

Claims (1)

PATENTANSPRÜCHE: r. Glühdraht für elektrische Glühlampen, Elektronenröhren, Röntgenröhren und andere elektrische Vakuumapparate, gekennzeichnet durch einen. Kerndraht aus schwer schmelzbarem Metall und einen Überzug aus Rhenium. a. Verfahren zur Herstellung von Glühdrähten nach Anspruch z, dadurch gekennzeichnet, daB in einem Hochvakuumrohr Rheniumdampf erzeugt und der Kerndraht aus schwer schmelzbarem Metall elektrisch zum Glühen gebracht wird.PATENT CLAIMS: r. Filament for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum apparatus, characterized by a. Core wire made of hard-to-melt metal and a coating of rhenium. a. procedure for the production of filaments according to claim z, characterized in that in A high vacuum tube generates rhenium vapor and the core wire is made of difficult-to-melt Metal is made to glow electrically.
DEB138289D 1928-07-10 1928-07-10 Glow wire for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum devices Expired DE615689C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEB138289D DE615689C (en) 1928-07-10 1928-07-10 Glow wire for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB138289D DE615689C (en) 1928-07-10 1928-07-10 Glow wire for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum devices

Publications (1)

Publication Number Publication Date
DE615689C true DE615689C (en) 1935-07-09

Family

ID=6999392

Family Applications (1)

Application Number Title Priority Date Filing Date
DEB138289D Expired DE615689C (en) 1928-07-10 1928-07-10 Glow wire for electric light bulbs, electron tubes, X-ray tubes and other electrical vacuum devices

Country Status (1)

Country Link
DE (1) DE615689C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT379711B (en) * 1982-01-28 1986-02-25 Tungsram Reszvenytarsasag POWER INLET, IN PARTICULAR FOR VACUUM TECHNICAL DEVICES, AND METHOD FOR THE PRODUCTION THEREOF

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT379711B (en) * 1982-01-28 1986-02-25 Tungsram Reszvenytarsasag POWER INLET, IN PARTICULAR FOR VACUUM TECHNICAL DEVICES, AND METHOD FOR THE PRODUCTION THEREOF

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