GB489028A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB489028A GB489028A GB31308/36A GB3130836A GB489028A GB 489028 A GB489028 A GB 489028A GB 31308/36 A GB31308/36 A GB 31308/36A GB 3130836 A GB3130836 A GB 3130836A GB 489028 A GB489028 A GB 489028A
- Authority
- GB
- United Kingdom
- Prior art keywords
- diaphragm
- cathode
- voltage
- heater
- separate
- 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
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract 1
- 239000005751 Copper oxide Substances 0.000 abstract 1
- 229910000431 copper oxide Inorganic materials 0.000 abstract 1
- 238000009499 grossing Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 238000004804 winding Methods 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
- Electrodes For Cathode-Ray Tubes (AREA)
Abstract
489,028. Cathode-ray tubes. RADIOAKT.-GES. D. S. LOEWE. Nov. 16, 1936, No. 31308. Convention date, Nov. 16, 1935. [Class 39 (i)] [Also in Group XXXV] A cathode-ray tube has between the cathode 4 and the deflecting means a series of three diaphragms 1, 5, 15, Fig. 1, which have higher positive potentials the more they are removed from the cathode, the first diaphragm 1 being at a potential of a few volts with respect to the cathode to eliminate space-charge and having a fine aperture 11 which is electronoptically reproduced on the screen. A cylindrical electrode 14 between the diaphragms 5, 15 acts as part of the main lens and is maintained at an intermediate positive potential. The side of the diaphragm 1 facing the screen is concave to assist the concentration of electrons on diaphragm 15. Owing to the high current taken by diaphragm 1 a source of potential separate from the high-voltage source is desirable. In Fig. 1 the cathode heating battery 9 provides the positive potential for diaphragm 1. If the heater is on an alternating supply a rectifier may be provided within the tube, together with a smoothing condenser. In the form shown in Fig. 3, the voltage from the heater transformer 6 is rectified by a diode consisting of anode 21 and cathode 20 heated by the main cathode heater 3. The rectified voltage across condenser 8 is applied to diaphragm 1. A separate winding may be provided on the transformer if a different voltage is desired. The diaphragm 1 may be used for intensity control, a voltage range of 6 volts being sufficient for complete modulation. The Specification as open to inspection under Sect. 91 includes also the provision of a separate modulating diaphragm beyond the diaphragm 1, Fig. 5 (Cancelled) (not shown). It states also that the concave surface of diaphragm 1 may be conical or spherical, a formula for the spherical radius being given, and that a copper oxide rectifier may be employed to rectify the heater voltage to supply the diaphragm 1. The diaphragm 1 is also shown biassed by a separate battery. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE489028X | 1935-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB489028A true GB489028A (en) | 1938-07-18 |
Family
ID=6543898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31308/36A Expired GB489028A (en) | 1935-11-16 | 1936-11-16 | Improvements in or relating to cathode ray tubes |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2173498A (en) |
| FR (1) | FR814076A (en) |
| GB (1) | GB489028A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE527842A (en) * | 1953-04-03 | |||
| US2806163A (en) * | 1954-08-18 | 1957-09-10 | Rca Corp | Triple gun for color television |
| US2919380A (en) * | 1957-07-23 | 1959-12-29 | Philco Corp | Electron discharge devices |
| US3065368A (en) * | 1957-12-27 | 1962-11-20 | Westinghouse Electric Corp | Cathode ray device |
| US3065376A (en) * | 1958-07-14 | 1962-11-20 | Westinghouse Electric Corp | Electron beam device |
| US3065375A (en) * | 1958-07-14 | 1962-11-20 | Westinghouse Electric Corp | Cathode ray device |
| NL98369C (en) * | 1958-07-17 | |||
| US3015749A (en) * | 1958-07-17 | 1962-01-02 | Philips Corp | High transconductance cathoderay tube |
| US3004186A (en) * | 1958-09-17 | 1961-10-10 | Zenith Radio Corp | Cathode-ray tube arrangement |
| US2971108A (en) * | 1958-09-26 | 1961-02-07 | Sylvania Electric Prod | Electron discharge device |
| US3016471A (en) * | 1959-06-04 | 1962-01-09 | Sylvania Electric Prod | Cathode ray tube structure |
-
1936
- 1936-11-10 US US110043A patent/US2173498A/en not_active Expired - Lifetime
- 1936-11-16 FR FR814076D patent/FR814076A/en not_active Expired
- 1936-11-16 GB GB31308/36A patent/GB489028A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR814076A (en) | 1937-06-14 |
| US2173498A (en) | 1939-09-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB489028A (en) | Improvements in or relating to cathode ray tubes | |
| GB394476A (en) | Electrical apparatus for producing a "saw-tooth" potential | |
| GB803221A (en) | Improvements relating to electron guns | |
| GB445094A (en) | Arrangements for operating cathode ray tubes | |
| GB486048A (en) | Improvements in or relating to image producing or converting electron multiplier tubes | |
| GB483012A (en) | Improvements in or relating to the operation of cathode ray tubes and arrangements therefor | |
| US2219194A (en) | Magnetic focusing of cathode ray tubes | |
| GB374913A (en) | Improvements in and relating to x-ray equipments | |
| GB463210A (en) | Improvements in or relating to cold cathode electron discharge tubes | |
| US2227033A (en) | Electron optical system | |
| GB450973A (en) | Improvements in or relating to cathode-ray tubes | |
| GB521637A (en) | Improvements in the deflection of cathode-ray beams | |
| GB355978A (en) | ||
| GB449245A (en) | Cathode ray tube | |
| GB505355A (en) | Improvements in or relating to cathode ray deflection | |
| US2128639A (en) | Electronic device | |
| GB480521A (en) | Improvements in or relating to cathode ray television apparatus | |
| JPS563949A (en) | Color picture tube device | |
| GB435203A (en) | Braun tube for television purposes | |
| GB478200A (en) | Improvements in or relating to cathode ray tubes | |
| GB510216A (en) | Improvements in or relating to indicating and/or recording arrangements employing cathode ray tubes | |
| US1993468A (en) | Device for preventing variation in the speed of the electrons in the case of braun tubes | |
| GB443864A (en) | Improvements in or relating to cathode ray tubes | |
| GB521638A (en) | Improvements in or relating to the deflection of cathode-ray beams | |
| US2017127A (en) | Cathode ray scanning device |