DE585894C - Incandescent cathode for discharge vessels - Google Patents
Incandescent cathode for discharge vesselsInfo
- Publication number
- DE585894C DE585894C DENDAT585894D DE585894DD DE585894C DE 585894 C DE585894 C DE 585894C DE NDAT585894 D DENDAT585894 D DE NDAT585894D DE 585894D D DE585894D D DE 585894DD DE 585894 C DE585894 C DE 585894C
- Authority
- DE
- Germany
- Prior art keywords
- parts
- cathode
- braid
- bifilar
- substance
- 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
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/15—Cathodes heated directly by an electric current
Landscapes
- Solid Thermionic Cathode (AREA)
- Discharge Lamp (AREA)
Description
Glühkathode für Entladungsgefäße, bei der zur Erzielung einer gleichmäßigen Emission der Kathode Kathodenteile niedrigerer Temperatur mit 'einem Stoff hoher Emissionsfähigkeit bedeckt sind, dadurch gekennzeichnet, daß der aus zwei bifilar gewickelten schraubenförmigen Teilen bestehende Glühfaden an seinem Umkehrpunkt zu einem ein einheitliches Leiterstück bildenden Zopf verdrillt ist und daß der verdrillte -Teil mit dem hochemittierenden Stoff, wie Erdalkalioxyd, bedeckt ist.Hot cathode for discharge vessels, in which to achieve a uniform Emission of the cathode Cathode parts of lower temperature with a substance high emissivity are covered, characterized in that the two bifilar wound helical Divide existing filament at its inflection point into a unified one Conductor piece forming pigtail is twisted and that the twisted part with the highly emissive Substance, such as alkaline earth oxide, is covered.
*) Von dem Patentsucher ist als der Erfinder angegeben worden:*) The patent seeker stated as the inventor:
Dr. August Gehrts in Berlin-Friedenau.Dr. August Gehrts in Berlin-Friedenau.
Hierzu 1 Blatt Zeichnungen1 sheet of drawings
Claims (1)
Ein Ausführungsbeispiel der Erfindung ist in der Figur dargestellt. Die Kathode besteht aus zwei bifilar gewickelten Drähten 1 und 2, deren zu verbindende Teile zu einem Zopf 3 verdrillt sind und mit einem hochemittierenden Material, z. B. mit einem Erdalkalioxyd, überzogen sind. Die vom Strom durchflossenen Teile können aus einem Stoff geringerer Emissionsfähigkeit, z. B. thoriertem Molybdän, bestehen.In the case of cathodes, which consist of two bifilar-wound helical parts, the point at which the two parts are united usually has a lower temperature, since there is no current flowing through it. According to the invention, in a hot cathode, in which the lower temperature cathode parts are covered with a substance of high emissivity and which consists of two bifilar-wound helical parts, these parts are at their reversal point to a unitary conductor piece in order to achieve a uniform emission of the cathode The braid that forms the braid is twisted and this braid is covered with the highly emissive substance, such as alkaline earth oxide.
An embodiment of the invention is shown in the figure. The cathode consists of two bifilar-wound wires 1 and 2, the parts of which to be connected are twisted into a pigtail 3 and coated with a highly emissive material, e.g. B. with an alkaline earth oxide coated. The parts through which the current flows can be made of a substance of lower emissivity, e.g. B. thoriated molybdenum exist.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE585894T |
Publications (1)
Publication Number | Publication Date |
---|---|
DE585894C true DE585894C (en) | 1933-10-12 |
Family
ID=6571948
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT585894D Expired DE585894C (en) | Incandescent cathode for discharge vessels |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE585894C (en) |
-
0
- DE DENDAT585894D patent/DE585894C/en not_active Expired
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