GB480711A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB480711A GB480711A GB2357836A GB2357836A GB480711A GB 480711 A GB480711 A GB 480711A GB 2357836 A GB2357836 A GB 2357836A GB 2357836 A GB2357836 A GB 2357836A GB 480711 A GB480711 A GB 480711A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- anode
- anodes
- aperture
- 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
- 239000010445 mica Substances 0.000 abstract 1
- 229910052618 mica group Inorganic materials 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/62—Electrostatic lenses
- H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
- H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
480,711. Cathode - ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd., and LEVIN, N. Aug. 27, 1936, No. 23578. [Class 39 (i)] A cathode-ray tube has a multiple anode electron lens system consisting of a first anode with an apertured plate and a plurality of further anodes each in the form of a cylinder closed by apertured plates, and the anodes are mounted so that the apertured plates are adjacent each other in pairs, the aperture of that plate of a pair which is remote from the cathode being larger than the aperture of the other plate of the pair. In one form, the first anode 3 is arranged close to the cathode 1, and the anodes 4, 10 closed by plates 5, 6 and 11, 12 are spaced along the beam by thin mica sheets 9, 13. The apertures 7, 14 are larger than the apertures 2, 8 respectively. Typical values of voltages, dimensions, spacings and aperture diameters are given. The invention is particularly applicable to high-vacuum tubes with fluorescent screens working with from 500 to 1000 volts on the final anode 10,' and a modulating electrode may be arranged between the cathode 1 and anode 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2357836A GB480711A (en) | 1936-08-27 | 1936-08-27 | Improvements in or relating to cathode ray tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2357836A GB480711A (en) | 1936-08-27 | 1936-08-27 | Improvements in or relating to cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB480711A true GB480711A (en) | 1938-02-28 |
Family
ID=10197945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2357836A Expired GB480711A (en) | 1936-08-27 | 1936-08-27 | Improvements in or relating to cathode ray tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB480711A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE972870C (en) * | 1951-10-09 | 1959-10-15 | Philips Nv | Electron beam tubes with an electron gun |
-
1936
- 1936-08-27 GB GB2357836A patent/GB480711A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE972870C (en) * | 1951-10-09 | 1959-10-15 | Philips Nv | Electron beam tubes with an electron gun |
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