DE631240C - Three-electrode tube with a plate-shaped anode - Google Patents
Three-electrode tube with a plate-shaped anodeInfo
- Publication number
- DE631240C DE631240C DENDAT631240D DE631240DD DE631240C DE 631240 C DE631240 C DE 631240C DE NDAT631240 D DENDAT631240 D DE NDAT631240D DE 631240D D DE631240D D DE 631240DD DE 631240 C DE631240 C DE 631240C
- Authority
- DE
- Germany
- Prior art keywords
- anode
- grid
- electrode tube
- metallic shell
- plate
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/40—Screens for shielding
Landscapes
- Cell Electrode Carriers And Collectors (AREA)
Description
Um einerseits eine hohe Verstärkung zu erhalten, andererseits die durch die Gitteranodenkapazität hervorgerufene Kopplung des Anodenkreises mit dem Gitterkreis zu vermindern, muß ein möglichst kleiner Wert dieser Gitteranodenkapazität angestrebt werden. Durch geeignete Anordnung der Elektroden sowie durch Anbringung einer metallischen Hülle hat man die schädliche Gitteranodenkapazität bereits stark erniedrigen können. Bei diesen Anordnungen greifen aber immer noch Kraftlinien von dem Gitter um das Anodenblech herum und vergrößern dadurch die Gitteranodenkapazität.On the one hand to obtain a high gain, on the other hand that of the grid anode capacitance To reduce induced coupling of the anode circle with the grid circle, the value of this must be as small as possible Grid anode capacity are aimed for. By arranging the electrodes appropriately as well as by attaching a metallic shell one has the harmful grid anode capacitance can already greatly humiliate. However, these arrangements always apply lines of force from the grid around the anode plate and thereby increase the grid anode capacitance.
Vorliegende Erfindung ermöglicht eine weitere Verbesserung der Konstruktion derartiger Röhren. Erfindungsgemäß ist bei einer Dreielektrodenröhre mit plattenförmiger Anode und metallischer Hülle diese zur ErzielungThe present invention enables a further improvement in the construction of such Tubes. According to the invention in a three-electrode tube with a plate-shaped anode and metallic shell to achieve this
so einer geringen Kapazität zwischen Gitter und Anode so ausgebildet, daß die metallische Umhüllung bzw. Teile von ihr nahe der Anode in die Entladungsbahn zwischen Gitter und Anode greifen und die dem Gitter züge-such a small capacity between grid and Anode designed so that the metallic shell or parts of it near the Grip the anode in the discharge path between the grid and the anode and pull the
ί5 kehrte Anodenfläche so weit abdecken, daß der größte Teil der von der Anode, insbe-. sondere von den Anodenrändern ausgehenden Kraftlinien auf der metallischen Hülle endigt.ί5 returned to cover the anode surface so far that most of the from the anode, esp. especially from the edges of the anode Lines of force on the metallic shell ends.
Die Abbildungen zeigen schematisch Ausführungsbeispiele des Erfindungsgedankens. /C bezeichnet jeweils die Kathode, die von dem GitterC umgeben wird, und A stellt die Anode dar, während die metallische Hülle, die zweckmäßig mit der Kathode verbunden wird, mit 5 bezeichnet ist. In Bild 1 umgibt die Hülle nur die Anode, in Bild 2 nur Gitter und Kathode und in Bild 3 das ganze Elektrodensystem. In diesem Falle greift die Hülle mit Teilen in den Anodengitter raum, so daß ein Schlitz zum Durchtritt der Elektronen frei bleibt. Bild 1 zeigt auch den ungefähren Verlauf der Kraftlinien und läßt erkennen, daß die Abschirmung in der erfindungsgemäßen Ausführung sehr wirksam ist.The figures show schematically exemplary embodiments of the inventive concept. / C in each case denotes the cathode which is surrounded by the grid C, and A represents the anode, while the metallic shell which is expediently connected to the cathode is denoted by 5. In Figure 1, the shell only surrounds the anode, in Figure 2 only the grid and cathode and in Figure 3 the entire electrode system. In this case, the shell engages with parts in the anode grid space, so that a slot remains free for the electrons to pass through. Figure 1 also shows the approximate course of the lines of force and shows that the shielding in the embodiment according to the invention is very effective.
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE631240T |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE631240C true DE631240C (en) | 1936-06-16 |
Family
ID=6578935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT631240D Expired DE631240C (en) | Three-electrode tube with a plate-shaped anode |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE631240C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK103197C (en) * | 1957-12-31 | 1965-11-29 | Philips Nv | Electron tubes. |
| US3254260A (en) * | 1962-12-27 | 1966-05-31 | Philips Corp | Electron discharge device for very high frequencies |
-
0
- DE DENDAT631240D patent/DE631240C/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK103197C (en) * | 1957-12-31 | 1965-11-29 | Philips Nv | Electron tubes. |
| US3254260A (en) * | 1962-12-27 | 1966-05-31 | Philips Corp | Electron discharge device for very high frequencies |
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