GB428525A - Improvements in or relating to television and like apparatus - Google Patents
Improvements in or relating to television and like apparatusInfo
- Publication number
- GB428525A GB428525A GB569533A GB569533A GB428525A GB 428525 A GB428525 A GB 428525A GB 569533 A GB569533 A GB 569533A GB 569533 A GB569533 A GB 569533A GB 428525 A GB428525 A GB 428525A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- cathode
- anode
- electrodes
- abutments
- 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
- 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
- H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation
Landscapes
- Electron Sources, Ion Sources (AREA)
Abstract
428,525. Cathode-ray tubes. BANKS, G. B., and BAIRD TELEVISION, Ltd., 58, Victoria Street, London. Feb. 26, 1934, No. 5695/33. [Class 39 (i)] In television and like cathode-ray tubes comprising a disc-shaped Wehnelt electrode 11 with a single control aperture surrounding the cathode tip 2 and two disc anodes 6, 12 at positive potentials increasing from the cathode, the electrodes 11, 6, 12 are provided with cylindrical abutments 9, 13, 3 surrounding the whole path of the electrons passing through the electrodes. As shown, the cathode tip 2 projects through the electrode 11 a short distance and the electrode 11 has two abutments 9 of different diameters. The anode 12 is part of an electrode comprising a cylinder 3 surrounded by a focusing coil 10, overlapping at 15 the abutment 13 and having apertured discs 12, 14. Modulating potentials are applied to the electrode 11 or the anode 6. The dimensions of the electrodes are specified. In a modification in which the tube contains a high vacuum instead of a gas filling, one of the two abutments 9, the coil 10 and the parts 14, 15 are all omitted and the cylinder 3 surrounds two deflecting plates. A known tube is described in which a cylindrical Wehnelt electrode is separated by insulation from a first discshaped anode and the deflecting plates are surrounded by the second anode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR769327D FR769327A (en) | 1934-02-26 | 1934-02-24 | Improvements to television and similar apparatus |
| GB569533A GB428525A (en) | 1934-02-26 | 1934-02-26 | Improvements in or relating to television and like apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB569533A GB428525A (en) | 1934-02-26 | 1934-02-26 | Improvements in or relating to television and like apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB428525A true GB428525A (en) | 1935-05-16 |
Family
ID=9800899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB569533A Expired GB428525A (en) | 1934-02-26 | 1934-02-26 | Improvements in or relating to television and like apparatus |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR769327A (en) |
| GB (1) | GB428525A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE757643C (en) * | 1937-05-11 | 1953-02-16 | Rca Corp | Electromagnetic electron lens for cathode ray tubes |
-
1934
- 1934-02-24 FR FR769327D patent/FR769327A/en not_active Expired
- 1934-02-26 GB GB569533A patent/GB428525A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE757643C (en) * | 1937-05-11 | 1953-02-16 | Rca Corp | Electromagnetic electron lens for cathode ray tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| FR769327A (en) | 1934-08-23 |
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