GB716769A - Improvements in or relating to cathode-ray tubes - Google Patents
Improvements in or relating to cathode-ray tubesInfo
- Publication number
- GB716769A GB716769A GB29791/52A GB2979152A GB716769A GB 716769 A GB716769 A GB 716769A GB 29791/52 A GB29791/52 A GB 29791/52A GB 2979152 A GB2979152 A GB 2979152A GB 716769 A GB716769 A GB 716769A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- magnetic
- apertures
- tubes
- guns
- 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
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
716,769. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Nov. 25, 1952 [Nov. 28, 1951], No. 29791/52. Class 39(1) In a cathode-ray tube such as for use in colour television, in which a plurality of electron guns produce a plurality of electron beams directed at a common point on a collecting screen, the electron guns are housed in parallel tubes 5, 6, 7, Fig. 1, connected to the bottom of the envelope, and a magnetic device for focusing the beams comprises a plurality of pairs of magnetic poles each in proximity to one of the guns, and a single coil energizing winding surrounding all the poles. The magnetic poles are comprised by a pair of plates 14, 15, Fig. 2, having apertures 17, 18 for receiving the tubes 5, 6, 7. Adjustable sleeves 19 of magnetic material are provided in the apertures in the lower plate 15. A magnetic cylinder 16 unites the upper and lower plates 14, 15 and encloses the energizing winding 13. The collecting screen 2 may comprise a mosaic of phosphor elements, the grid 3 in front of the screen comprising a large number of small apertures, or the phosphor elements may be arranged in lines, the grid comprising a number of wires. The electron guns may be arranged in a straight line or at the apexes of a triangle.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL165668 | 1951-11-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB716769A true GB716769A (en) | 1954-10-13 |
Family
ID=19750546
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29791/52A Expired GB716769A (en) | 1951-11-28 | 1952-11-25 | Improvements in or relating to cathode-ray tubes |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US2689922A (en) |
| BE (1) | BE515797A (en) |
| CH (1) | CH309698A (en) |
| ES (1) | ES206481A1 (en) |
| FR (1) | FR1067170A (en) |
| GB (1) | GB716769A (en) |
| NL (1) | NL85814C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1051416B (en) * | 1955-01-17 | 1959-02-26 | Loewe Opta Ag | Electron beam tubes, preferably television picture tubes |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2847600A (en) * | 1953-06-25 | 1958-08-12 | Rca Corp | Tri-color kinescope |
| NL225735A (en) * | 1957-03-13 |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB432485A (en) * | 1933-12-29 | 1935-07-29 | Alan Dower Blumlein | Improvements in and relating to television and the like systems employing cathode ray tubes |
| US2170944A (en) * | 1937-05-29 | 1939-08-29 | Bell Telephone Labor Inc | Multicathode ray discharge device |
| US2407667A (en) * | 1941-09-30 | 1946-09-17 | Bell Telephone Labor Inc | Harmonic generator |
| US2631259A (en) * | 1950-07-12 | 1953-03-10 | Rca Corp | Color television |
-
0
- NL NL85814D patent/NL85814C/xx active
- BE BE515797D patent/BE515797A/xx unknown
-
1952
- 1952-11-13 US US320271A patent/US2689922A/en not_active Expired - Lifetime
- 1952-11-25 GB GB29791/52A patent/GB716769A/en not_active Expired
- 1952-11-25 ES ES0206481A patent/ES206481A1/en not_active Expired
- 1952-11-26 FR FR1067170D patent/FR1067170A/en not_active Expired
- 1952-11-26 CH CH309698D patent/CH309698A/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1051416B (en) * | 1955-01-17 | 1959-02-26 | Loewe Opta Ag | Electron beam tubes, preferably television picture tubes |
Also Published As
| Publication number | Publication date |
|---|---|
| BE515797A (en) | |
| NL85814C (en) | |
| ES206481A1 (en) | 1953-01-01 |
| CH309698A (en) | 1955-09-15 |
| FR1067170A (en) | 1954-06-14 |
| US2689922A (en) | 1954-09-21 |
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