GB754261A - Dual focus cathode-ray tubes - Google Patents
Dual focus cathode-ray tubesInfo
- Publication number
- GB754261A GB754261A GB11553/54A GB1155354A GB754261A GB 754261 A GB754261 A GB 754261A GB 11553/54 A GB11553/54 A GB 11553/54A GB 1155354 A GB1155354 A GB 1155354A GB 754261 A GB754261 A GB 754261A
- Authority
- GB
- United Kingdom
- Prior art keywords
- beams
- diaphragms
- colour
- viewing screen
- tube
- 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
- H01J31/00—Cathode ray tubes; Electron beam tubes
- H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
- H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
- H01J31/20—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours
- H01J31/201—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode
- H01J31/203—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam
- H01J31/205—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes for displaying images or patterns in two or more colours using a colour-selection electrode with more than one electron beam with three electron beams in delta configuration
-
- 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
- H01J29/462—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement arrangements for interrupting the beam during inoperative periods
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
754,261. Colour television tubes. RADIO CORPORATION OF AMERICA. April 21, 1954 [April 30, 1953], No. 11553/54. Class 39 (1). A cathode-ray tube with a plurality of electron beams, a patterned apertured member and a viewing screen, e.g. a colour television tube, has individual non-circular apertures in diaphragms placed in the beams before deflection designed to prevent overlap and dilution of the separate beams on the viewing screen. In a multi-line colour tube 19 with a deflection grill of fine parallel wires, the diaphragms b, f, g are located within the first anodes of the respective guns and are of truncated spherical shape, Fig. 3, with the long dimension parallel to the colour lines. The portions of the beam giving overlap on the viewing screen are cut off at the sides a, a1 of the diaphragms. The beams may each span three or more grill wires w1, w2, w3, as shown in Fig. 9. When the apertured screen is of the dot-type with the dots arranged on a hexagonal pattern the diaphragm apertures 57 are of hexagonal shape, Fig. 11. The three guns may be in delta formation or in line.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US352239A US2747134A (en) | 1953-04-30 | 1953-04-30 | Dual focus cathode-ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB754261A true GB754261A (en) | 1956-08-08 |
Family
ID=23384339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB11553/54A Expired GB754261A (en) | 1953-04-30 | 1954-04-21 | Dual focus cathode-ray tubes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2747134A (en) |
| BE (1) | BE528430A (en) |
| FR (1) | FR1103573A (en) |
| GB (1) | GB754261A (en) |
| NL (1) | NL187195B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2850658A (en) * | 1956-02-21 | 1958-09-02 | Rca Corp | Non-symmetrical cathodes in cathode ray tubes |
| US2850659A (en) * | 1956-02-23 | 1958-09-02 | Rca Corp | Color-kinescopes, etc. |
| NL215405A (en) * | 1956-03-16 | |||
| NL113454C (en) * | 1957-12-11 | |||
| FR1392502A (en) * | 1963-10-30 | 1965-03-19 | Cft Comp Fse Television | Operation with color television receiver tubes |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2595548A (en) * | 1947-02-24 | 1952-05-06 | Rca Corp | Picture reproducing apparatus |
| US2609516A (en) * | 1950-10-31 | 1952-09-02 | Rca Corp | Art of forming and utilizing electron-beams of noncircular cross section |
| US2659026A (en) * | 1951-04-12 | 1953-11-10 | Rca Corp | Cathode-ray tube of the masked target variety |
-
0
- BE BE528430D patent/BE528430A/xx unknown
- NL NLAANVRAGE7708397,A patent/NL187195B/en unknown
-
1953
- 1953-04-30 US US352239A patent/US2747134A/en not_active Expired - Lifetime
-
1954
- 1954-04-21 GB GB11553/54A patent/GB754261A/en not_active Expired
- 1954-04-23 FR FR1103573D patent/FR1103573A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE528430A (en) | |
| FR1103573A (en) | 1955-11-04 |
| NL187195B (en) | |
| US2747134A (en) | 1956-05-22 |
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