DE741399C - Process to improve the high vacuum in high voltage discharge vessels - Google Patents
Process to improve the high vacuum in high voltage discharge vesselsInfo
- Publication number
- DE741399C DE741399C DES130215D DES0130215D DE741399C DE 741399 C DE741399 C DE 741399C DE S130215 D DES130215 D DE S130215D DE S0130215 D DES0130215 D DE S0130215D DE 741399 C DE741399 C DE 741399C
- Authority
- DE
- Germany
- Prior art keywords
- voltage discharge
- discharge vessels
- high vacuum
- improve
- high voltage
- 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
- H01J9/00—Apparatus 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
- H01J9/38—Exhausting, degassing, filling, or cleaning vessels
- H01J9/385—Exhausting vessels
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Description
Verfahren zur Verbesserung des Hochvakuums in Hochspannungsentladungsgefäßen Für die Entgasung der Metallteile von Hochvakuumröhren sind im wesentlichen zwei Verfahren bekannt, nämlich die Hochfrequenzentgasung und die Erhitzung der Metallteile mit Elektronenbombardement. Beide Verfahren haben sich im allgemeinen recht gut bewährt, doch stößt man auf Schwierigkeiten, wenn es sich um Röhren mit ausgedehnten metallischen Teilen handelt Insbesondere bei Hochspannungsentladungsgefäßen, z. B. bei Großsenderöhrert mit Wasserkühlung, bei denen die Gefahr des Auftretens von Überschlägen im Betriebe vorhanden ist, hat es sich gegeigt, daß ein ausreichendes Vakuum, das die notwendige Sicherheit gegen solche Überschläge bietet, nur schwer zu erreichen ist. Man ist genötigt, den Pumpvorgang sehr lange auszudehnen und die Röhre unter strengen Bedingungen zu prüfen. Diese Schwierigkeiten werden durch die vorliegende Erfindung vermieden. Erfindungsgemäß werden zur Verbesserung des Hochvakuums in Hochspannungsentladungsgefäßen, bei denen im Betriebe Überschläge auftreten können, die im Entladungsgefäß befindlichen Systemteile während des Pump-und Prüfungsvorganges durch eine Klopfvorrichtung in mechanische Schwingungen versetzt. Es hat sich gezeigt, daß dadurch die Gefahr des Auftretens von Überschlägen im Betriebe beseitigt oder zumindest wesentlich herabgemindert wird.Process for improving the high vacuum in high-voltage discharge vessels For the degassing of the metal parts of high vacuum tubes there are essentially two Process known, namely high-frequency degassing and heating of the metal parts with electron bombardment. Both procedures have generally worked out pretty well proven, but you run into difficulties when it comes to tubes with extended metallic parts are involved in particular in high-voltage discharge vessels, e.g. B. at Großsenderöhrert with water cooling, where there is a risk of occurrence of If there is flashover in the establishment, it has turned out that a sufficient Vacuum that offers the necessary security against such flashovers is difficult can be achieved. One is forced to extend the pumping process for a very long time and the Test tube under strict conditions. These difficulties are caused by the present invention avoided. According to the invention to improve the high vacuum in high-voltage discharge vessels, where flashovers can occur in operation, the system parts located in the discharge vessel during the pumping and testing process set in mechanical vibrations by a knocking device. It has shown, that thereby eliminates the risk of flashovers in the company or is at least substantially reduced.
Der Grund hierfür dürfte darin zu suchen sein, daß an den Metallflächen leicht anhaftende Gasreste durch die mechanische Erschütterung von dem Metall gelöst werden. Vielleicht werden auch lose am Metall haftende Oxydreste, unter denen sich noch Gasteilchen befinden, welchen .durch die Oxydreste der Austritt verwehrt wird, zum Abfällen gebracht, so daß diese Gasteilchen frei «-erden. Die Gasteilchen werden nun, wenn sich die Röhre noch an der Pumpe befindet, sofort von der Pumpe abgesaugt. Die während der Prüfung der Röhre im abgeschmolzenen Zustand freigemachten Teilchen müssen von anderen Röhrenteilen absorbiert werden. In Senderöhren z. B. sind in der Regel Tantal- oder Niobteile vorhanden, die die Gasteilchen absorbieren oder adsorbieren, so daß man bei solchen Röhren auch während des Prüfvorganges das Verfahren nach der Erfindung finit Erfolg anwenden kann.The reason for this is likely to be found in the fact that on the metal surfaces Slightly adhering gas residues are loosened from the metal by the mechanical shock will. Perhaps there will also be oxide residues loosely adhering to the metal, underneath there are still gas particles, which .by the oxide residues the exit is refused, brought to waste, so that these gas particles are released. the If the tube is still attached to the pump, gas particles are immediately removed sucked off by the pump. During the test of the tube in the melted state freed particles must be absorbed by other parts of the tube. In transmitter tubes z. B. tantalum or niobium parts are usually present that absorb the gas particles or adsorb, so that with such tubes the Method according to the invention can apply finitely success.
Die Stärke der von der Klopfvorrichtung erzeugten mechanischenSchwingungen (Schallschwingungen ) muß so bemessen «erden, dal3 eine Zerstörung der Röhre durch Resonanzerscheinungen an den Glasteilen vermieden wird. Statt normaler Schallwellen kann man auch Ultraschallwellen auf die Metallteile der Röhre einwirken lassen.The strength of the mechanical vibrations generated by the rapping device (Sound vibrations) must be measured in such a way that the tube is destroyed Resonance phenomena on the glass parts is avoided. Instead of normal sound waves you can also let ultrasonic waves act on the metal parts of the tube.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES130215D DE741399C (en) | 1937-12-31 | 1937-12-31 | Process to improve the high vacuum in high voltage discharge vessels |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DES130215D DE741399C (en) | 1937-12-31 | 1937-12-31 | Process to improve the high vacuum in high voltage discharge vessels |
Publications (1)
Publication Number | Publication Date |
---|---|
DE741399C true DE741399C (en) | 1943-11-10 |
Family
ID=7538381
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DES130215D Expired DE741399C (en) | 1937-12-31 | 1937-12-31 | Process to improve the high vacuum in high voltage discharge vessels |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE741399C (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6391182B2 (en) | 1997-05-02 | 2002-05-21 | 3M Innovative Properties Company | Electrochemical fluorination using interrupted current |
-
1937
- 1937-12-31 DE DES130215D patent/DE741399C/en not_active Expired
Non-Patent Citations (1)
Title |
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None * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6391182B2 (en) | 1997-05-02 | 2002-05-21 | 3M Innovative Properties Company | Electrochemical fluorination using interrupted current |
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