DE540990C - Process for absorbing excess gases in glow cathode tubes - Google Patents

Process for absorbing excess gases in glow cathode tubes

Info

Publication number
DE540990C
DE540990C DER67533D DER0067533D DE540990C DE 540990 C DE540990 C DE 540990C DE R67533 D DER67533 D DE R67533D DE R0067533 D DER0067533 D DE R0067533D DE 540990 C DE540990 C DE 540990C
Authority
DE
Germany
Prior art keywords
cathode tubes
absorbing excess
excess gases
glow cathode
gas
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
DER67533D
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.)
RADIO ROEHREN LAB DR NICKEL G
Original Assignee
RADIO ROEHREN LAB DR NICKEL G
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 RADIO ROEHREN LAB DR NICKEL G filed Critical RADIO ROEHREN LAB DR NICKEL G
Priority to DER67533D priority Critical patent/DE540990C/en
Application granted granted Critical
Publication of DE540990C publication Critical patent/DE540990C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J7/00—Details not provided for in the preceding groups and common to two or more basic types of discharge tubes or lamps
    • H01J7/14—Means for obtaining or maintaining the desired pressure within the vessel
    • H01J7/18—Means for absorbing or adsorbing gas, e.g. by gettering

Landscapes

  • Electron Sources, Ion Sources (AREA)

Description

Verfahren zum Absorbieren überschüssiger Gase in Glühkathodenröhren Es ist bekannt, daß eine Gasfüllung in einem Entladungsgefäß nur dann in geeigneter Weise wirksam sein kann, wenn die Gasfüllung unter einem ganz bestimmten kritischen Druck steht, der u. a. von der zur Verwendung kommenden Anodenspannung abhängig ist. Schon bei der Fabrikation ist es sehr schwierig, diesen Gasdruck genau abzugleichen. Wenn die Röhren eine Zeitlang in Betrieb sind, stellen sich oft Änderungen des Gasdruckes ein, die den Wirkungsgrad des Entladungsgefäßes vermindern.Method of absorbing excess gases in hot cathode tubes It is known that a gas filling in a discharge vessel is only suitable Way can be effective when the gas filling is below a very specific critical Pressure is, among other things. depends on the anode voltage to be used is. Already during manufacture it is very difficult to precisely adjust this gas pressure. When the tubes have been in operation for a period of time, changes in gas pressure often occur which reduce the efficiency of the discharge vessel.

Man hat früher bei Ionenröhren bereits verschiedene Methoden vorgeschlagen, um den Gasdruck aufrechtzuerhalten. Man hat dazu Hilfselektroden benutzt, die, in Form von Drähten im Entladungsgefäß angeordnet, bei Erwärmung Gas abgaben, oder auch leicht zerstäubbare Metallbänder, die in besonderen Ansätzen des Entladungsgefäßes untergebracht waren.Various methods have previously been proposed for ion tubes, to maintain the gas pressure. Auxiliary electrodes were used for this purpose, which, in Arranged in the form of wires in the discharge vessel, emitted gas when heated, or also easily atomizable metal strips, which are in special approaches to the discharge vessel were housed.

Ferner ist es bereits bekannt, bei Glühkathodenröhren mit Gasfüllung eine der Elektroden zur Regelung der Gasfüllung zu benutzen. Durch die Art der Vorbehandlung, z. B. durch Variation von Temperatur und äußerem Druck, hat man es weitgehend in der Hand, größere oder geringere Gasmengen in den Elektroden zurückzulassen. Die vorliegende Erfindung betrifft ein Verfahren inHochvakuumröhren, die eine bestimmte geringe Gasfüllung aufweisen, unter Anwendung der Anode bzw. des Gitters als regulierende Elektrode überflüssige Gasmengen zu beseitigen. DieAbsorption der -überflüssigen Gasmengen wird erfindungsgemäß dadurch bewirkt, daß man zwischen die Glühkathode und die absorbierende Elektrode (z. B. die Anode) eine Wechselspannung legt. Die Gasfüllung wird dadurch in der einen Phase ionisiert, und bei der anderen Phase der Wechselspannung, wo der negative Pol an der Anode liegt, werden die positiven Ionen mit solcher Geschwindigkeit gegen das Anodenblech geschleudert, daß sie zwischen den Molekülen des Anodenmaterials hindurch in das Innere der Anode eindringen. Man läßt die Wechselspannung so lange wirken, bis der gewünschte niedrige Gasdruck erreichtist.Furthermore, it is already known in the case of hot cathode tubes with a gas filling to use one of the electrodes to regulate the gas filling. Due to the type of pretreatment, z. B. by varying temperature and external pressure, one has it largely in hand to leave larger or smaller amounts of gas in the electrodes. the The present invention relates to a method in high vacuum tubes using a specific have low gas filling, using the anode or the grid as a regulating Electrode to remove excess amounts of gas. The absorption of the superfluous According to the invention, amounts of gas are brought about by placing between the hot cathode and the absorbing electrode (e.g. the anode) applies an alternating voltage. the Gas filling is ionized in one phase and in the other phase the alternating voltage, where the negative pole is at the anode, becomes the positive Ions hurled against the anode plate at such a speed that they between the molecules of the anode material penetrate into the interior of the anode. Man lets the alternating voltage act until the desired low gas pressure is reached.

Es mag erwähnt sein, daß sich die leichtesten Gase am besten absorbieren lassen.It may be mentioned that the lightest gases absorb each other best permit.

Claims (1)

PATENTANSPRUCfI: Verfahren zum Absorbieren überschüssiger Gase in Glühkathodenröhren, dadurch gekennzeichnet, daß zwischen die Glühkathode und eine der kalten Elektroden eine Wechselspannung gelegt wird.PATENT CLAIM: Process for absorbing excess gases in Hot cathode tubes, characterized in that between the hot cathode and a AC voltage is applied to the cold electrodes.
DER67533D 1926-05-05 1926-05-05 Process for absorbing excess gases in glow cathode tubes Expired DE540990C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DER67533D DE540990C (en) 1926-05-05 1926-05-05 Process for absorbing excess gases in glow cathode tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DER67533D DE540990C (en) 1926-05-05 1926-05-05 Process for absorbing excess gases in glow cathode tubes

Publications (1)

Publication Number Publication Date
DE540990C true DE540990C (en) 1932-01-06

Family

ID=7413165

Family Applications (1)

Application Number Title Priority Date Filing Date
DER67533D Expired DE540990C (en) 1926-05-05 1926-05-05 Process for absorbing excess gases in glow cathode tubes

Country Status (1)

Country Link
DE (1) DE540990C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1020081B (en) * 1956-09-29 1957-11-28 Siemens Ag Vacuum switch with built-in sorption pump
DE1271845B (en) * 1961-07-12 1968-07-04 Telefunken Patent Process for maintaining or improving the vacuum state of a high-performance transmitter tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1020081B (en) * 1956-09-29 1957-11-28 Siemens Ag Vacuum switch with built-in sorption pump
DE1271845B (en) * 1961-07-12 1968-07-04 Telefunken Patent Process for maintaining or improving the vacuum state of a high-performance transmitter tube

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