DE544532C - Process for degassing electron tubes - Google Patents

Process for degassing electron tubes

Info

Publication number
DE544532C
DE544532C DES66992D DES0066992D DE544532C DE 544532 C DE544532 C DE 544532C DE S66992 D DES66992 D DE S66992D DE S0066992 D DES0066992 D DE S0066992D DE 544532 C DE544532 C DE 544532C
Authority
DE
Germany
Prior art keywords
grid
degassing
anode
electron tubes
cathode
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
DES66992D
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.)
Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE
Original Assignee
Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE
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 Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE filed Critical Sueddeutsche Telefon Apparate Kabel und Drahtwerke AG TEKADE
Priority to DES66992D priority Critical patent/DE544532C/en
Application granted granted Critical
Publication of DE544532C publication Critical patent/DE544532C/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01JELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/38Exhausting, degassing, filling, or cleaning vessels
    • H01J9/385Exhausting vessels

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electron Sources, Ion Sources (AREA)

Description

Verfahren zur Entgasung von Elektronenröhren Gegenstand vorliegender Erfindung ist eine neue Methode zur Entgasung von Vakuumgefäßen, insbesondere Elektronenröhren mit drei oder mehreren Elektroden. Die Elektronenröhren erfordern ein sehr hohes Vakuum, das auch während des Betriebs der Röhre nicht nachlassen darf. Deshalb müssen sämtliche Metallteile sorgfältig entgast werden. Zu diesem Zwecke werden nach den bekannten Methoden die Metallelektroden entweder nacheinander oder gleichzeitig mit dem positiven Pol einer hohen Spannung verbunden. Die durch den Aufprall der Elektronen erzielte Erhitzung der Metallteile bewirkt die Abgabe der in ihnen eingeschlossenen Gase. Ist das Gitter der zu entgasenden Röhre relativ nahe am Glühfaden angeordnet, so ist es möglich, daß sich der Glühfaden durch die vorhandenen elektrostatischen Anziehungskräfte an das Gitter anlegt, wodurch Kurzschlüsse entstehen.Process for the degassing of electron tubes is the subject of the present Invention is a new method for degassing vacuum vessels, in particular electron tubes with three or more electrodes. The electron tubes require a very high one Vacuum, which must not decrease even during the operation of the tube. Therefore must all metal parts are carefully degassed. For this purpose, the known methods the metal electrodes either one after the other or at the same time connected to the positive pole of a high voltage. The by the impact of the Electrons achieved by heating the metal parts causes the release of those enclosed in them Gases. If the grid of the tube to be degassed is arranged relatively close to the filament, so it is possible for the filament to move through the existing electrostatic Attractive forces applied to the grid, creating short circuits.

Vorliegende Erfindung beseitigt diesen Nachteil. Erfindungsgemäß werden Gitter und Anode in der Weise in einem Arbeitsgang entgast, daß nur an die Anode eine positive Spannung gelegt und das Gitter leitend mit der Kathode verbunden wird. Um das Gitter auf die zur Entgasung notwendige Temperatur zu bringen, genügt es nämlich, wenn ein Teil der auf die Anode zu fliegenden Elektronen auf das Gitter gelangt, wobei sich auch die von der glühenden Anode ausgehenden Wärmestrahlen an der Erhitzung des Gitters beteiligen. Ist das Gitter sehr eng, so kann die Zahl der auftreffenden Elektronen und damit die Temperatur des Gitters zu hoch werden. Um einerseits diesen Nachteil zu vermeiden, anderseits die durch Ionisierung der bei der Entgasung aus den Elektronen austretenden Gase entstehende positive Aufladung des Gitters zu vermeiden, wird das Gitter erfindungsgemäß mit der Kathode verbunden. Auf diese Weise ist es möglich, eine Entgasung der Elektroden in einem Arbeitsgang vorzunehmen, so daß eine wesentliche Zeitersparnis und Vereinfachung der Arbeitsmethode bewirkt wird. Der Erfindungsgedanke kann in der gleichen Weise auch bei Mehrgitterröhren Anwendunz finden.The present invention overcomes this disadvantage. Be according to the invention Grid and anode are degassed in one operation in such a way that only the anode is degassed a positive voltage is applied and the grid is conductively connected to the cathode. It is sufficient to bring the grid to the temperature required for degassing namely, when some of the electrons to be flown to the anode hit the grid arrives, whereby the heat rays emanating from the glowing anode also accumulate participate in the heating of the grid. If the grid is very narrow, the number can be the impinging electrons and thus the temperature of the lattice become too high. On the one hand to avoid this disadvantage, on the other hand that caused by ionization of the positive charge generated during degassing from the gases emitted by the electrons To avoid the grid, the grid is connected to the cathode according to the invention. In this way it is possible to degas the electrodes in one operation make, so that a significant time saving and simplification of the working method is effected. The concept of the invention can be applied in the same way to multi-grid tubes Find application.

Claims (1)

PATENTANSPRUCH: Verfahren zur Entgasung von Elektronenröhren mit mindestens einer zwischen Anode und Kathode angeordneten durchbrcchenen Elektrode durch Elektronenbombardement, dadurch gekennzeichnet, daß Gitter und Anode in der Weise in einem Arbeitsgang entgast werden, daß nur an die Anode eine hohe positive Spannung angelegt wird und zur Vermeidung einer durch Ionisierung der bei der Entgasung aus den Elektroden austretenden Gase entstehenden positiven Rufladungen des Gitters dieses mit der Kathode verbunden wird.PATENT CLAIM: Process for degassing electron tubes with at least a broken electrode arranged between anode and cathode by electron bombardment, characterized in that the grid and anode are degassed in one operation that a high positive voltage is only applied to the anode and to avoid it one by ionizing the gases emerging from the electrodes during degassing resulting positive call charges of the grid this connected to the cathode will.
DES66992D 1924-09-06 1924-09-06 Process for degassing electron tubes Expired DE544532C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES66992D DE544532C (en) 1924-09-06 1924-09-06 Process for degassing electron tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES66992D DE544532C (en) 1924-09-06 1924-09-06 Process for degassing electron tubes

Publications (1)

Publication Number Publication Date
DE544532C true DE544532C (en) 1932-02-19

Family

ID=7499213

Family Applications (1)

Application Number Title Priority Date Filing Date
DES66992D Expired DE544532C (en) 1924-09-06 1924-09-06 Process for degassing electron tubes

Country Status (1)

Country Link
DE (1) DE544532C (en)

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