GB694569A - Improvements in or relating to thermionic valves - Google Patents
Improvements in or relating to thermionic valvesInfo
- Publication number
- GB694569A GB694569A GB805050A GB805050A GB694569A GB 694569 A GB694569 A GB 694569A GB 805050 A GB805050 A GB 805050A GB 805050 A GB805050 A GB 805050A GB 694569 A GB694569 A GB 694569A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wires
- cathode
- anode
- grid
- valve
- 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
- H01J21/00—Vacuum tubes
- H01J21/02—Tubes with a single discharge path
Landscapes
- Electron Sources, Ion Sources (AREA)
Abstract
694.569. Thermionic valves. ENGLISH ELECTRIC VALVE CO., Ltd. Feb. 16, 1951 [March 30, 1950], No. 8050/50. Class 39(i) A thermionic valve comprises a tubular anode surrounding a cathode in the form of a plurality of wires or strips and at least one control grid, which is also in the form of a plurality of wires or strips, interposed between the cathode and the anode, and is characterised by the provision of an additional grid of wires or the like on the side of the cathode remote from the anode and adapted to concentrate the electron stream towards the anode so that parts of the electron stream which would otherwise impinge on the control grid fall on the anode. The additional grid is preferably so positioned that it will operate as required when at cathode potential and it may be connected to the cathode within the valve. The electrodes may be concentric, Fig. 4, with the cathode wires CW equally spaced about a circle, the additional grid wires FGW opposite the mid-points between the cathode wires, the control grid having pairs of closely spaced wires CGW arranged so that a cathode wire is opposite the mid-point between the wires of each closely spaced pair, and the anode A surrounding the other electrodes. Graphs are given showing the reduced grid current obtained with this construction as compared with a similar valve with the additional grid FCW omitted, Figs. 8 and 9 (not shown).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB805050A GB694569A (en) | 1950-03-30 | 1950-03-30 | Improvements in or relating to thermionic valves |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB805050A GB694569A (en) | 1950-03-30 | 1950-03-30 | Improvements in or relating to thermionic valves |
Publications (1)
Publication Number | Publication Date |
---|---|
GB694569A true GB694569A (en) | 1953-07-22 |
Family
ID=9844819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB805050A Expired GB694569A (en) | 1950-03-30 | 1950-03-30 | Improvements in or relating to thermionic valves |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB694569A (en) |
-
1950
- 1950-03-30 GB GB805050A patent/GB694569A/en not_active Expired
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