GB280851A - Improvements in or relating to thermionic valves or electron discharge tubes - Google Patents
Improvements in or relating to thermionic valves or electron discharge tubesInfo
- Publication number
- GB280851A GB280851A GB11475/27A GB1147527A GB280851A GB 280851 A GB280851 A GB 280851A GB 11475/27 A GB11475/27 A GB 11475/27A GB 1147527 A GB1147527 A GB 1147527A GB 280851 A GB280851 A GB 280851A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- control grid
- anode
- filament
- screening
- 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
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
280,851. Naamlooze Vennootschap Philips' Gloeilampenfabrieken. Nov. 19, 1926, [Convention date]. Vacuum tubes. - A valve has a cathode, an anode, a control grid, a screening grid of substantially the same length as the control grid, and one or more metal shields insulated from the screening grid and connected with a point of constant potential, the shields being so shaped and arranged that all the electrostatic lines of force between the control grid and anode are compelled to pass through the screening grid. As shown in Fig. 1, the metal shields 7, 8, of smaller diameter than the screening grid 5, are mounted by glass rings 11 on the control grid 4, and are connected together by a band 12, the plate 8 being connected with one of the leads for the filament 3. The lead for the anode 6 is taken through the foot 2, and the lead for the control grid through the top of the envelope. In a modification the plates are mounted on the screening grid. In another arrangement the plate 8 is mounted on one of the filament leads, and the plate 7 is mounted on a rod which supports the loop of the filament and is sealed in the top of the envelope. In the arrangement shown in Fig. 5 the plates 7, 8 are mounted by glass rings 11 in' the anode 6, and are provided with metal rings 20 projecting between the control grid 4 and screening grid 5. In a further arrangement the plates 7, 8 are joined by two or more metal bands or by a cylindrical metal screen, and the plate 8 is carried by a filament lead and by a support mounted in the foot.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL280851X | 1926-11-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB280851A true GB280851A (en) | 1928-03-08 |
Family
ID=19782292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11475/27A Expired GB280851A (en) | 1926-11-19 | 1927-04-29 | Improvements in or relating to thermionic valves or electron discharge tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB280851A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE751159C (en) * | 1933-08-02 | 1953-02-02 | Emi Ltd | Discharge tubes with at least the following electrodes: a cathode, a control grid, an anode and a screen grid between anode and control grid, between whose screen grid and anode a brake chamber charge is to be formed |
| DE757350C (en) * | 1936-02-26 | 1954-08-02 | Rca Corp | Electron tubes |
-
1927
- 1927-04-29 GB GB11475/27A patent/GB280851A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE751159C (en) * | 1933-08-02 | 1953-02-02 | Emi Ltd | Discharge tubes with at least the following electrodes: a cathode, a control grid, an anode and a screen grid between anode and control grid, between whose screen grid and anode a brake chamber charge is to be formed |
| DE757350C (en) * | 1936-02-26 | 1954-08-02 | Rca Corp | Electron tubes |
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