GB958804A - Electron gun - Google Patents
Electron gunInfo
- Publication number
- GB958804A GB958804A GB9568/61A GB956861A GB958804A GB 958804 A GB958804 A GB 958804A GB 9568/61 A GB9568/61 A GB 9568/61A GB 956861 A GB956861 A GB 956861A GB 958804 A GB958804 A GB 958804A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- screen
- cathode
- electron gun
- focusing electrode
- 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
- Electrodes For Cathode-Ray Tubes (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
958,804. Cathode-ray tubes. RADIO CORPORATION OF AMERICA. March 15, 1961 [April 13, 1960], No. 9568/61. Heading H1D. An electron gun comprises a cathode (not shown), a control electrode G1, Fig. 5, a cupshaped screen electrode G2, a tubular focusing electrode G3 and a tubular anode G4 which has an apertured transverse partition 88 at its end facing the focusing electrode, the diameter D1 of the focusing electrode being greater than that, D2, of the screen electrode and equal to, or slightly greater than, the axial distance L between the apertured ends of the accelerating and screen electrodes. The following relationship is given between the distances L, D1, D2 and L2 shown in Fig. 5: L2 : D2 : D1 : L = 1 : 4 : 5 : 5. The ratio D4 : D1 equals 1 : 3. Variations from these preferred ratios are acceptable. The screen electrode G2 may have the form shown in Fig. 6 in which a concave member 102 is integral with or separated inserted into the cup 101.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US21966A US3090882A (en) | 1960-04-13 | 1960-04-13 | Electron gun |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB958804A true GB958804A (en) | 1964-05-27 |
Family
ID=21807113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9568/61A Expired GB958804A (en) | 1960-04-13 | 1961-03-15 | Electron gun |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3090882A (en) |
| GB (1) | GB958804A (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB976664A (en) * | 1962-02-20 | 1964-12-02 | Atomic Energy Authority Uk | Improvements in or relating to ion sources |
| US3524197A (en) * | 1968-05-28 | 1970-08-11 | Sanders Associates Inc | High intensity projection cathode ray tube |
| US3678333A (en) * | 1970-06-15 | 1972-07-18 | American Optical Corp | Field emission electron gun utilizing means for protecting the field emission tip from high voltage discharges |
| FR2201536B1 (en) * | 1972-09-26 | 1976-08-13 | Thomson Csf | |
| US3777210A (en) * | 1972-10-30 | 1973-12-04 | Rca Corp | Electron gun and method of assembly |
| NL166573C (en) * | 1973-11-17 | 1981-08-17 | Philips Nv | CATHED BEAM TUBE. |
| US3995194A (en) * | 1974-08-02 | 1976-11-30 | Zenith Radio Corporation | Electron gun having an extended field electrostatic focus lens |
| JPS53146531A (en) * | 1977-05-27 | 1978-12-20 | Hitachi Ltd | Pickup tube |
| US4318027A (en) * | 1978-04-12 | 1982-03-02 | Rca Corporation | High potential, low magnification electron gun |
| AU4515779A (en) * | 1978-04-12 | 1979-10-18 | Rca Corp. | Electron gun |
| JPS58103751A (en) * | 1981-12-16 | 1983-06-20 | Hitachi Ltd | Electron beam focussing lens unit |
| GB8613170D0 (en) * | 1986-05-30 | 1986-07-02 | Philips Nv | Cathode ray tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2922072A (en) * | 1957-12-05 | 1960-01-19 | Sylvania Electric Prod | Image reproduction device |
-
1960
- 1960-04-13 US US21966A patent/US3090882A/en not_active Expired - Lifetime
-
1961
- 1961-03-15 GB GB9568/61A patent/GB958804A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3090882A (en) | 1963-05-21 |
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