GB1197556A - Improvements in or relating to Cathode-Ray Tubes - Google Patents
Improvements in or relating to Cathode-Ray TubesInfo
- Publication number
- GB1197556A GB1197556A GB10371/69A GB1037169A GB1197556A GB 1197556 A GB1197556 A GB 1197556A GB 10371/69 A GB10371/69 A GB 10371/69A GB 1037169 A GB1037169 A GB 1037169A GB 1197556 A GB1197556 A GB 1197556A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- edges
- cathode
- lens
- high permeability
- 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
- 230000035699 permeability Effects 0.000 abstract 2
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
-
- 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
- H01J29/50—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube
- H01J29/506—Electron guns two or more guns in a single vacuum space, e.g. for plural-ray tube guns in delta or circular configuration
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
1,197,556. Cathode - ray display tubes. ZENITH RADIO CORP. 26 Feb., 1969 [10 May, 1968], No. 1037]/69. Heading H1D. The edges of coaxial cylindrical electrodes forming an electrostatic lens are shaped to screen the lens from the effect of changes accumulating on the envelope of a cathode ray tube. Fig. 1 shows a colour television tube of the shadow mask-type using three electron guns each of which includes a lens system G3, G4, G5; the edges of the outer electrodes G3 and G5 are curved back at 31 and the edges of the centre electrodes G4 are curved in concentric arcs 30. The spacing between the electrodes should be small compared with the radial length of the flanges 30. When a blue lateral connection magnet is provided, the G3 electrodes of the red and green guns should preferably be of material of high permeability to protect these beams from the influence of the magnet; the G4 electrodes should also be of high permeability material to shield the lenses from stray magnetic fields.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US72816368A | 1968-05-10 | 1968-05-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1197556A true GB1197556A (en) | 1970-07-08 |
Family
ID=24925680
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10371/69A Expired GB1197556A (en) | 1968-05-10 | 1969-02-26 | Improvements in or relating to Cathode-Ray Tubes |
Country Status (4)
Country | Link |
---|---|
US (1) | US3501668A (en) |
DE (1) | DE1922867A1 (en) |
ES (1) | ES367021A1 (en) |
GB (1) | GB1197556A (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2031486A1 (en) * | 1970-06-25 | 1971-12-30 | Siemens Ag | Electrostatic lens, especially for electrostatic vidicon |
JPS5743972B1 (en) * | 1971-02-05 | 1982-09-18 | ||
NL7404365A (en) * | 1974-04-01 | 1975-10-03 | Philips Nv | CATHOD BEAM TUBE FOR DISPLAYING COLORED IMAGES. |
JPH0656739B2 (en) * | 1984-07-26 | 1994-07-27 | 株式会社東芝 | Electron gun |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2971118A (en) * | 1958-11-10 | 1961-02-07 | Sylvania Electric Prod | Electron discharge device |
-
1968
- 1968-05-10 US US728163A patent/US3501668A/en not_active Expired - Lifetime
-
1969
- 1969-02-26 GB GB10371/69A patent/GB1197556A/en not_active Expired
- 1969-05-05 DE DE19691922867 patent/DE1922867A1/en active Pending
- 1969-05-09 ES ES367021A patent/ES367021A1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE1922867A1 (en) | 1969-11-27 |
US3501668A (en) | 1970-03-17 |
ES367021A1 (en) | 1971-06-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |