GB517756A - Improvements in or relating to cathode ray devices - Google Patents
Improvements in or relating to cathode ray devicesInfo
- Publication number
- GB517756A GB517756A GB4616/39A GB461639A GB517756A GB 517756 A GB517756 A GB 517756A GB 4616/39 A GB4616/39 A GB 4616/39A GB 461639 A GB461639 A GB 461639A GB 517756 A GB517756 A GB 517756A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- anode
- screen
- cathode
- resistances
- 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
- H01J29/58—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
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
517,756. Cathode-ray tubes. ELECTRICAL RESEARCH PRODUCTS, Inc. Feb. 13, 1939, No. 4616. Convention date, Feb. 19, 1937. [Class 39 (i)] In a tube of the iconoscope type a cylindrical electrode, at a lower positive potential than the focusing anode, is placed between the anode and the screen to prevent secondary electrons derived from the anode from reaching the screen. In the arrangement shown the focusing anode 19 consists of a cylinder 27 of greater diameter than the controlling electrode 21 and a cylinder 28 of the same diameter as the controlling electrode the two being connected by a transverse plane portion 26. The cylindrical electrode 20 is of larger diameter than either and is connected to a conducting lining 11 in the neck of the tube and the envelope. The anode 19 is maintained at a potential about 3,000 volts above that of the cathode and the electrode 20 at 800 or 900 volts below the electrode 19. The plates 13 and 14 of one pair of deflecting plates and those 15, 16 of the other are connected through resistances 36, 37 respectively and the mid points of these resistances are connected to the electrode 20. The screen may be made as described in Specification 474,591. Specification 493,882 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US517756XA | 1938-02-19 | 1938-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB517756A true GB517756A (en) | 1940-02-07 |
Family
ID=21973303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4616/39A Expired GB517756A (en) | 1938-02-19 | 1939-02-13 | Improvements in or relating to cathode ray devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB517756A (en) |
-
1939
- 1939-02-13 GB GB4616/39A patent/GB517756A/en not_active Expired
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