GB904505A - Improvements in or relating to electron discharge tubes for television, radar and the like - Google Patents
Improvements in or relating to electron discharge tubes for television, radar and the likeInfo
- Publication number
- GB904505A GB904505A GB37954/58A GB3795458A GB904505A GB 904505 A GB904505 A GB 904505A GB 37954/58 A GB37954/58 A GB 37954/58A GB 3795458 A GB3795458 A GB 3795458A GB 904505 A GB904505 A GB 904505A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- screen
- shield
- aperture
- mandrel
- 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
- H01J29/48—Electron guns
- H01J29/488—Schematic arrangements of the electrodes for beam forming; Place and form of the elecrodes
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
904,505. Cathode-ray tubes. HARRIES ELECTRONICS CORPORATION Ltd. Nov. 17, 1959 [Nov. 25, 1958], No. 37954/58. Class 39 (1). An electron gun includes an apertured shielding electrode 4, Fig. 1, an indirectly-heated cathode 1 of axially symmetrical shape and having a forward part 2 which projects through the aperture and is tapered towards its forward end. An initially diverging beam is emitted from the cathode forward part. The apertured end of shield 4, which is also the modulator, may be flat as shown or conical with a forward taper. The still-diverging beam passes through a first anode 9 and a second 10 to a beam-limiting aperture 13, the image of which is finally focused on phosphor screen 17a, Fig. 3, by the final electron lens as an extremely fine spot. The image on screen 17a is reflected by internal Schmidt mirror 20 through corrector plate 27 to final viewing screen 28. The screen 17a and a locating pin 23 are supported on spider arms 24, 25. During assembly, the cathode point is accurately centred in the shield aperture by a jig with adjusting screws which move the ceramic disc 5. The adjusted cathode-shield unit is then aligned with the remaining electrodes by mandrel 29, Fig. 5, and spacers 31, 32, 36, before supporting posts 15, Fig. 1, are finally sealed into four glass supporting arms 16. Mandrel 29 is rotatable on bearings 33, 34 and has a recess 44 to give room for the cathode point. Specification 897,359 is referred to.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB37954/58A GB904505A (en) | 1958-11-25 | 1958-11-25 | Improvements in or relating to electron discharge tubes for television, radar and the like |
| US855133A US3179844A (en) | 1958-11-25 | 1959-11-24 | Electron gun having tapered emitting cathode surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB37954/58A GB904505A (en) | 1958-11-25 | 1958-11-25 | Improvements in or relating to electron discharge tubes for television, radar and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB904505A true GB904505A (en) | 1962-08-29 |
Family
ID=10400198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB37954/58A Expired GB904505A (en) | 1958-11-25 | 1958-11-25 | Improvements in or relating to electron discharge tubes for television, radar and the like |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3179844A (en) |
| GB (1) | GB904505A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1145205A (en) * | 1966-06-17 | 1969-03-12 | English Electric Valve Co Ltd | Improvements in or relating to cathode ray tubes |
| JPS5831696B2 (en) * | 1978-09-19 | 1983-07-07 | 松下電子工業株式会社 | Electron gun for cathode ray tube |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB420067A (en) * | 1932-02-23 | 1934-11-22 | Erich Hudec | Improvements in braun tubes, more particularly for television purposes |
| US2227051A (en) * | 1933-09-23 | 1940-12-31 | Wienecke Bruno | Braun tube |
| US2173165A (en) * | 1936-05-16 | 1939-09-19 | Rca Corp | Electron tube |
| US2227070A (en) * | 1937-06-09 | 1940-12-31 | Rca Corp | Projection system |
| US2223040A (en) * | 1937-06-30 | 1940-11-26 | Gen Electric | Electron discharge device |
| US2363359A (en) * | 1941-05-01 | 1944-11-21 | Gen Electric | Electron microscope |
| DE880319C (en) * | 1946-10-24 | 1953-05-07 | Philips Nv | Cathode ray tubes for television use |
| US2632130A (en) * | 1947-11-28 | 1953-03-17 | Joseph F Hull | High current density beam tube |
| NL158008B (en) * | 1950-04-28 | Ibm | HOLOGRAPHIC MEMORY. | |
| DE903017C (en) * | 1951-01-31 | 1954-02-01 | Sueddeutsche Lab G M B H | Manufacture of small balls from high-fusible materials |
| US2640950A (en) * | 1951-06-06 | 1953-06-02 | Atomic Energy Commission | Point electron source |
| BE531122A (en) * | 1953-08-14 | |||
| US2886729A (en) * | 1953-10-08 | 1959-05-12 | Du Mont Allen B Lab Inc | Grid-cathode structure for cathode ray tubes |
| US2767457A (en) * | 1954-11-01 | 1956-10-23 | Rca Corp | Color kinescopes and methods of making same |
| US2947897A (en) * | 1958-01-08 | 1960-08-02 | Itt | Electron gun structure |
| US2938134A (en) * | 1958-01-13 | 1960-05-24 | Itt | Electron gun |
| US3065374A (en) * | 1959-10-12 | 1962-11-20 | Varian Associates | Low noise electron discharge device |
-
1958
- 1958-11-25 GB GB37954/58A patent/GB904505A/en not_active Expired
-
1959
- 1959-11-24 US US855133A patent/US3179844A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3179844A (en) | 1965-04-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB747755A (en) | Improvements in electrode structures for beam discharge devices | |
| GB642083A (en) | Improvements relating to cathode ray tubes | |
| GB556046A (en) | Improvements relating to electron guns such as are used in cathode ray tubes | |
| GB803221A (en) | Improvements relating to electron guns | |
| GB940480A (en) | Electron discharge device | |
| ES8102413A1 (en) | Colour display tube. | |
| GB878219A (en) | Improvements in or relating to cathode ray tubes | |
| GB1060377A (en) | Cathode ray tube | |
| GB501058A (en) | Improvements in or relating to cathode ray tubes | |
| US2935636A (en) | Electron gun structure | |
| GB795627A (en) | Improvements in or relating to storage tubes | |
| GB452844A (en) | Improvements in or relating to cathode ray tubes | |
| GB904505A (en) | Improvements in or relating to electron discharge tubes for television, radar and the like | |
| US2861208A (en) | Combination focusing and converging lens for multiple beam tubes | |
| GB419727A (en) | A braun tube for oscillographic and television purposes | |
| US3681645A (en) | Cathode-ray character-display tube | |
| GB495707A (en) | Improvements in or relating to focussing systems for use in electric discharge tubes | |
| GB864272A (en) | Electron gun | |
| GB743181A (en) | Improvements in or relating to cathode ray tubes | |
| US2939980A (en) | Image reproduction device structure | |
| GB907385A (en) | Electron gun structure for cathode ray tubes | |
| GB470496A (en) | Television tube | |
| GB842973A (en) | Improvements in or relating to cathode ray tubes | |
| JPS5489472A (en) | Electron gun for cathode-ray tube | |
| US3904913A (en) | Focusing means for cathode ray tubes |