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DE397010C - Process for the production of carbon threads for electric light bulbs - Google Patents

Process for the production of carbon threads for electric light bulbs

Info

Publication number
DE397010C
DE397010C DEN20192D DEN0020192D DE397010C DE 397010 C DE397010 C DE 397010C DE N20192 D DEN20192 D DE N20192D DE N0020192 D DEN0020192 D DE N0020192D DE 397010 C DE397010 C DE 397010C
Authority
DE
Germany
Prior art keywords
production
electric light
light bulbs
carbon
carbon threads
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
DEN20192D
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of DE397010C publication Critical patent/DE397010C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01KELECTRIC INCANDESCENT LAMPS
    • H01K1/00Details
    • H01K1/02Incandescent bodies
    • H01K1/04Incandescent bodies characterised by the material thereof
    • H01K1/06Carbon bodies

Landscapes

  • Inorganic Fibers (AREA)

Description

Verfahren zur Herstellung von Kohlefäden für elektrische Glühlampen. Die Erfindung betrifft ein Verfahren zur Herstellung von Kohlefäden, die in elektrischen Glühlampen Verwendung finden sollen, aus vorgereinigter Rohbaumwolle oder Rohzellulose. Das Verfahren besteht im wesentlichen darin, daß die Kohlefäden einer besonderen Nachreinigung unterworfen werden.Process for the production of carbon filaments for electric light bulbs. The invention relates to a method for producing carbon threads in electrical Incandescent lamps should be used, made from pre-cleaned raw cotton or raw cellulose. The method consists essentially in that the carbon threads of a special Be subjected to post-cleaning.

Es ist an und für sich bekannt, Kohlefäden dadurch zu reinigen bzw. weiterzureinigen, daß man Halogenverbindungen auf sie einwirken läßt. Man hat aber bisher nennenswerte Resultate nicht erzielen können, weil man auf das Vorhandensein der Magnesia, die als Aschenrest in den Kohlefäden vorhanden ist, keine Rücksicht nahm. Diese Magnesia übt bei einer Temperatur von i8oo'C und mehr eine starke Wirkung aus und stößt die umliegenden Kohleteilchen ab.It is known in and of itself to use it to clean or to further purify that halogen compounds are allowed to act on them. But you have so far not able to achieve noteworthy results, because one on the existence the magnesia, which is present as ash residue in the carbon threads, has no regard for it took. This magnesia has a powerful effect at a temperature of 180 ° C and above and repels the surrounding coal particles.

Um nun diese schädlichen Magnesiarückstände zu entfernen, sollen gemäß der Erfindung die vorgereinigten Rohbaumwolle- oder Rohzellulose-Fäden in einer verdünnten Atmosphäre von halogenen Kohlenstoffgasen oberhalb einer Temperatur von i8oo' C, welche die Reaktionstemperatur von Magnesia mit Kohle darstellt, nachgereinigt werden. Hierdurch wird nicht nur bewirkt, daß sich die Asche mit dem Halogengas nach der Formel 2 MgO + C i: = Mg2 C i + 0, verbindet, sondern es wird auch das Eintreten der umkehrbaren chemischen Verbindung MgO + C ' Mg + CO durch zwei chemische Reaktionen MgO + C = Mg + CO und 2 Mg + C i == Mg2 C i verhindert.In order to remove these harmful magnesia residues, according to the invention, the pre-cleaned raw cotton or raw cellulose threads are to be cleaned in a dilute atmosphere of halogen carbon gases above a temperature of 100 ° C, which is the reaction temperature of magnesia with coal. This not only causes the ash to combine with the halogen gas according to the formula 2 MgO + C i: = Mg2 C i + 0 , but also causes the reversible chemical combination of MgO + C 'Mg + CO to occur through two chemical reactions MgO + C = Mg + CO and 2 Mg + C i == Mg2 C i prevented.

Die nach dem neuen Verfahren hergestellten Kohlefäden können einerTemperatur von 2ooo'C für Tausende von Stunden widerstehen und liefern ein weißes Licht von gleicher Intensität wie Wolframfäden. Letzteren gegenüber weisen sie aber den Vorteil auf, daß sie bedeutend billiger sind.The carbon filaments produced by the new process can have a temperature withstand from 2ooo'C for thousands of hours and deliver a white light from same intensity as tungsten filaments. However, they have the advantage over the latter on that they are significantly cheaper.

Claims (1)

PATENT-AwspRucia: Verfahren zur Herstellung von Kohlefäden für elektrischeGlühlampen aus vorgereinigter Rohbaumwolle oder Rohzellulose, dadurch gekennzeichnet, daß die Fäden in einer verdünnten Atmosphäre von halogenen Kohlenstoffgasen oberhalb einer Temperatur von i8oo'C, der Reaktionstemperatur von Magnesia mit Kohle, nachgereinigt werden.PATENT-AwspRucia: Process for the production of carbon filaments for electric light bulbs made of pre-cleaned raw cotton or raw cellulose, characterized in that the Threads in a dilute atmosphere of halogen carbon gases above a Temperature of 180 ° C, the reaction temperature of magnesia with charcoal, purified will.
DEN20192D 1920-09-12 1921-07-29 Process for the production of carbon threads for electric light bulbs Expired DE397010C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP397010X 1920-09-12

Publications (1)

Publication Number Publication Date
DE397010C true DE397010C (en) 1924-06-14

Family

ID=12560302

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN20192D Expired DE397010C (en) 1920-09-12 1921-07-29 Process for the production of carbon threads for electric light bulbs

Country Status (1)

Country Link
DE (1) DE397010C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2910250A1 (en) * 2006-12-26 2008-06-27 Duna Entpr Sa Halogen hair dryer for use by hairdressing professional, has tube with branches that are extended in parallel manner to central axis of support below layer of spirals composed by resistor and wound around ribbed sides of support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2910250A1 (en) * 2006-12-26 2008-06-27 Duna Entpr Sa Halogen hair dryer for use by hairdressing professional, has tube with branches that are extended in parallel manner to central axis of support below layer of spirals composed by resistor and wound around ribbed sides of support

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