AT115484B - Hot cathode for discharge tubes. - Google Patents
Hot cathode for discharge tubes.Info
- Publication number
- AT115484B AT115484B AT115484DA AT115484B AT 115484 B AT115484 B AT 115484B AT 115484D A AT115484D A AT 115484DA AT 115484 B AT115484 B AT 115484B
- Authority
- AT
- Austria
- Prior art keywords
- hot cathode
- discharge tubes
- incandescent body
- incandescent
- support
- Prior art date
Links
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
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Glühkathode für Entladungsrohren.
Die Länge des bei elektrischen Entladungsröhren, beispielsweise bei Glühkathodenröntgenröhren mit bandförmigem Brennfleck, verwendeten stabförmigen Glühkörpers ist dadurch begrenzt, dass ein solcher, an seinen beiden Enden gehahener Glühkörper beim Betriebe der Röntgenröhre infolge des auftretenden starken elektrischen Feldes verhältnismässig stark durchhängt. Den Durehhang des Glühkörpers durch Einfügen mehrerer Unterstützungsdrähte zwischen seine beiden Enden zu verhindern, ist an sich insofern von Nachteil, als jeder Stützdraht eine Wärmeableitung von den gestützten Glüh-
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des Brennfleekes mit Elektronen, zur Folge hat.
Gemäss der Erfindung werden diese Nachteile durch die Verwendung eines mehrfach gestützten, schraubenlinien- oder zickzackförmigen Glühkörpers, dessen Windungen bzw. Zacken an den Stützstellen geringeren Abstand aufweisen als an den übrigen Stellen, beseitigt. Die Heizwirkung kann dadurch in der Umgebung der Stützstelle in demselhen Masse erhöht werden, als eine erhöhte Wärmeableitung durch die Stützkörper stattfindet.
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grösserung des Abstandes dieser Windungen zu vermehren, ist bei Glühlampen bekannt.
**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.
<Desc / Clms Page number 1>
Hot cathode for discharge tubes.
The length of the rod-shaped incandescent body used in electrical discharge tubes, for example in hot cathode X-ray tubes with a ribbon-shaped focal point, is limited by the fact that such an incandescent body, held at both ends, sags relatively heavily when the X-ray tube is in operation due to the strong electric field that occurs. Preventing the incandescent body from sagging by inserting several support wires between its two ends is inherently disadvantageous in that each support wire provides heat dissipation from the supported incandescent
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of the focal spot with electrons.
According to the invention, these disadvantages are eliminated through the use of a helical or zigzag-shaped incandescent body with multiple supports, the turns or prongs of which are spaced less apart at the support points than at the other points. The heating effect can thereby be increased in the vicinity of the support point to the same extent as there is increased heat dissipation through the support body.
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Increasing the distance between these windings is known for incandescent lamps.
** WARNING ** End of DESC field may overlap beginning of CLMS **.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE115484X | 1925-11-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT115484B true AT115484B (en) | 1929-12-27 |
Family
ID=5654266
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT115484D AT115484B (en) | 1925-11-02 | 1926-10-30 | Hot cathode for discharge tubes. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT115484B (en) |
-
1926
- 1926-10-30 AT AT115484D patent/AT115484B/en active
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