DE397010C - Process for the production of carbon threads for electric light bulbs - Google Patents
Process for the production of carbon threads for electric light bulbsInfo
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01K—ELECTRIC INCANDESCENT LAMPS
- H01K1/00—Details
- H01K1/02—Incandescent bodies
- H01K1/04—Incandescent bodies characterised by the material thereof
- H01K1/06—Carbon 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)
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)
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 |
-
1921
- 1921-07-29 DE DEN20192D patent/DE397010C/en not_active Expired
Cited By (1)
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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