GB495185A - Improvements in or relating to television cathode ray tubes - Google Patents
Improvements in or relating to television cathode ray tubesInfo
- Publication number
- GB495185A GB495185A GB3852/37A GB385237A GB495185A GB 495185 A GB495185 A GB 495185A GB 3852/37 A GB3852/37 A GB 3852/37A GB 385237 A GB385237 A GB 385237A GB 495185 A GB495185 A GB 495185A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- cathode
- cone
- lens
- varying
- 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
- Transforming Electric Information Into Light Information (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
495,185. Cathode - ray tubes. RADIOAKT.-GES. D. S. LOEWE. Feb. 9, 1937, No. 3852. Convention date, Feb. 11, 1936. [Class 39 (i)] The concentrating lens-system of a cathoderay tube comprises two lenses each consisting of a truncated cone with its smaller end towards the cathode and an annular diaphragm, the electrodes having higher positive potentials as they are further from the cathode. The lens nearer the cathode 3 consists of the cone 4 and diaphragm 1, and the second lens of a cone 6 attached to a cylinder 5, and a diaphragm 7. The spot on the screen may be the image of the cathode 3 or of the aperture of the diaphragm 1. The brightness of the spot is adjusted by varying the potential of the cone 4, its size by varying the potential of the cylinder 5 and cone 6, and the focal length of the lens system by varying the potential of the diaphragm 1. Examples of voltages and dimensions are given. The deflecting electrodes 8, 9, 10 are formed of sheet metal arranged to form a closed surface so that they can be heated by eddy currents to expel gas. The distance between the two sets of deflecting electrodes and that between the deflecting electrodes and the diaphragm 7 should be at least three times the diameter of aperture of the diaphragm 7 as set forth in Specifications 430,650 and 452,650. Specification 455,084 also is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE495185X | 1936-02-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB495185A true GB495185A (en) | 1938-11-09 |
Family
ID=6544850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3852/37A Expired GB495185A (en) | 1936-02-11 | 1937-02-09 | Improvements in or relating to television cathode ray tubes |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2227016A (en) |
| FR (1) | FR817738A (en) |
| GB (1) | GB495185A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2466065A (en) * | 1944-09-08 | 1949-04-05 | Tung Sol Lamp Works Inc | Direct-current amplifier and circuit |
| GB704878A (en) * | 1948-11-26 | 1954-03-03 | Siemens Ag | Improvements in or relating to cathode ray oscillographs |
| US2672568A (en) * | 1951-03-27 | 1954-03-16 | Int Standard Electric Corp | Electron gun for cathode-ray tubes |
| US2597363A (en) * | 1951-06-29 | 1952-05-20 | Ibm | Cathode-ray storage tube |
-
1937
- 1937-02-05 US US124293A patent/US2227016A/en not_active Expired - Lifetime
- 1937-02-09 GB GB3852/37A patent/GB495185A/en not_active Expired
- 1937-02-11 FR FR817738D patent/FR817738A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR817738A (en) | 1937-09-09 |
| US2227016A (en) | 1940-12-31 |
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