AT100389B - Method and device for measuring the degree of evacuation of electrical discharge vessels. - Google Patents
Method and device for measuring the degree of evacuation of electrical discharge vessels.Info
- Publication number
- AT100389B AT100389B AT100389DA AT100389B AT 100389 B AT100389 B AT 100389B AT 100389D A AT100389D A AT 100389DA AT 100389 B AT100389 B AT 100389B
- Authority
- AT
- Austria
- Prior art keywords
- evacuation
- measuring
- degree
- electrical discharge
- discharge vessels
- Prior art date
Links
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Measuring Fluid Pressure (AREA)
Description
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Verfahren und Einrichtung zum Messen des Evakuierungsgrades elektrischer Ent- ladungsgefässe.
Zur Messung des Vakuums bei Kathodenstrahlenröhren hat man bereits mehrere Verfahren in Vorschlag gebracht. So besteht z. B. eins darin, dass in das zu untersuchende Vakuum Thermoelemente eingesetzt und von aussen bestrahlt werden. Infolge der Abnahme des Vakuums vermindert sich die Wärmestrahlung zu den Thermoelementen und dementsprechend auch die über das Thermoelement fliessenden Ströme. Hieraus könnte ein Schluss auf den erreichten Grad des Vakuums gezogen werden.
Einanderes Verfahren schlug folgenden Wegein : Dain einem ungenügenden Vakuum die Elektronenemission zusammen mit der Bildung von positiven und negativen Ionen vor sich geht, so müsste bei zunehmender Entlüftung der Betrag der positiven Ionen abnehmen, so dass bei vollkommenem Vakuum dieselben gänzlich ausfallen und lediglich negative Elektronen vorhanden sind. Der Vorgang wurde durch ein in den Anodenkreis geschaltetes Amperemeter augenfällig gemacht und könnte als Vakuum-
EMI1.1
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Wird ein Elektronenbombardement nicht beabsichtigt, findet also die Entgasung der Anode und des Gitters durch andere Mittel statt, so ist es nicht notwendig, den Anodenstrom ständig eingeschaltet zu lassen, und es kann dieser in angemessenen Zeitabständen zur Durchführung der Messung des Glühkathodenwiderstandes kurzzeitig eingeschaltet werden.
PATENT-ANSPRÜCHE :
1. Verfahren zur Messung des Evakuierungsgrades von Vakuumgefässen mit Glühkathode, insbesondere elektrischen Entladungsgefässen, dadurch gekennzeichnet, dass die Giösse der Widerstandsschwankungen der Glühkathode bei fliessendem Anodenstrom als Mass der Evakuierung benutzt wird.
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Method and device for measuring the degree of evacuation of electrical discharge vessels.
Several methods have already been proposed for measuring the vacuum in cathode ray tubes. So there is z. B. one is that thermocouples are inserted into the vacuum to be examined and irradiated from the outside. As a result of the decrease in the vacuum, the thermal radiation to the thermocouples and, accordingly, the currents flowing through the thermocouple also decrease. A conclusion could be drawn from this as to the degree of vacuum achieved.
Another method took the following approach: Since electron emission goes hand in hand with the formation of positive and negative ions in an insufficient vacuum, the amount of positive ions would have to decrease with increasing venting, so that in a perfect vacuum they fail completely and only negative electrons are present are. The process was made visible by an ammeter connected to the anode circuit and could be seen as a vacuum
EMI1.1
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If an electron bombardment is not intended, i.e. the anode and the grid are degassed by other means, it is not necessary to leave the anode current switched on at all times, and it can be switched on briefly at appropriate time intervals to carry out the measurement of the hot cathode resistance.
PATENT CLAIMS:
1. A method for measuring the degree of evacuation of vacuum vessels with hot cathodes, in particular electrical discharge vessels, characterized in that the size of the resistance fluctuations of the hot cathode when the anode current is flowing is used as a measure of the evacuation.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE100389X | 1921-06-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
AT100389B true AT100389B (en) | 1925-07-10 |
Family
ID=5648514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AT100389D AT100389B (en) | 1921-06-21 | 1922-06-20 | Method and device for measuring the degree of evacuation of electrical discharge vessels. |
Country Status (1)
Country | Link |
---|---|
AT (1) | AT100389B (en) |
-
1922
- 1922-06-20 AT AT100389D patent/AT100389B/en active
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