GB1228809A - - Google Patents
Info
- Publication number
- GB1228809A GB1228809A GB1228809DA GB1228809A GB 1228809 A GB1228809 A GB 1228809A GB 1228809D A GB1228809D A GB 1228809DA GB 1228809 A GB1228809 A GB 1228809A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- apertures
- less
- july
- common
- 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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/06—Screens for shielding; Masks interposed in the electron stream
- H01J29/07—Shadow masks for colour television tubes
- H01J29/073—Mounting arrangements associated with shadow masks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrodes For Cathode-Ray Tubes (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
1,228,809. Colour television tubes. PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd. 15 July, 1968 [18 July, 1967], No. 33648/68. Heading H1D. A triple electron gun for a colour television tube adapted to produce beams whose axes lie at the corners of an equilateral triangle, and comprising three cathodes 6 (only one of which is shown), three common grids 8, 10 and 12 each provided with an aperture for each of the three beams, and a common fourth grid 14 of circular cross-section, is characterized in that the centres of the apertures in the third grid are less than 4 mm. from the axis and the thickness of the third grid at these apertures is no greater than this distance and is preferably less than 1 mm. The third grid may be provided with an annular protuberance 12 surrounding the apertures and of a diameter less than or equal to that of the adjacent portion 16 of the fourth grid. The fourth grid may comprise two cylindrical portions, as shown, the length of the narrower portion 16 being preferably equal to its radius, which in one example is 7 mm.; alternatively the electrode may be conical at least in part. The construction shown includes a fifth grid 15 of the same diameter as the wider portion 17 of the fourth grid.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL6709978A NL6709978A (en) | 1967-07-18 | 1967-07-18 | |
| NL6809258A NL156857B (en) | 1967-07-18 | 1968-06-29 | ELECTRON BREAM TUBE WITH AN ELECTRON GUN FOR GENERATING THREE ELECTRON BUNDLES. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1228809A true GB1228809A (en) | 1971-04-21 |
Family
ID=26644218
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1228809D Expired GB1228809A (en) | 1967-07-18 | 1968-07-15 | |
| GB1230109D Expired GB1230109A (en) | 1967-07-18 | 1968-07-15 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1230109D Expired GB1230109A (en) | 1967-07-18 | 1968-07-15 |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS521267B1 (en) |
| BE (2) | BE718131A (en) |
| CH (2) | CH483721A (en) |
| DE (2) | DE1764596C3 (en) |
| FR (2) | FR1572071A (en) |
| GB (2) | GB1228809A (en) |
| NL (2) | NL6709978A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4520292A (en) * | 1983-05-06 | 1985-05-28 | Rca Corporation | Cathode-ray tube having an asymmetric slot formed in a screen grid electrode of an inline electron gun |
| US4608515A (en) * | 1985-04-30 | 1986-08-26 | Rca Corporation | Cathode-ray tube having a screen grid with asymmetric beam focusing means and refraction lens means formed therein |
| US4634924A (en) * | 1985-08-06 | 1987-01-06 | Rca Corporation | Electron gun having cylindrical focus lens |
-
1967
- 1967-07-18 NL NL6709978A patent/NL6709978A/xx unknown
-
1968
- 1968-06-29 NL NL6809258A patent/NL156857B/en not_active IP Right Cessation
- 1968-07-02 DE DE19681764596 patent/DE1764596C3/en not_active Expired
- 1968-07-11 DE DE19681762578 patent/DE1762578C3/en not_active Expired
- 1968-07-15 CH CH1054068A patent/CH483721A/en not_active IP Right Cessation
- 1968-07-15 GB GB1228809D patent/GB1228809A/en not_active Expired
- 1968-07-15 JP JP4954568A patent/JPS521267B1/ja active Pending
- 1968-07-15 CH CH1054168A patent/CH489899A/en not_active IP Right Cessation
- 1968-07-15 GB GB1230109D patent/GB1230109A/en not_active Expired
- 1968-07-16 BE BE718131D patent/BE718131A/xx unknown
- 1968-07-16 BE BE718132D patent/BE718132A/xx unknown
- 1968-07-18 FR FR1572071D patent/FR1572071A/fr not_active Expired
- 1968-07-18 FR FR1572072D patent/FR1572072A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH489899A (en) | 1970-04-30 |
| DE1764596C3 (en) | 1978-11-09 |
| JPS521267B1 (en) | 1977-01-13 |
| NL156857B (en) | 1978-05-16 |
| DE1764596B2 (en) | 1978-03-16 |
| FR1572071A (en) | 1969-06-20 |
| GB1230109A (en) | 1971-04-28 |
| DE1762578C3 (en) | 1978-11-23 |
| DE1764596A1 (en) | 1971-09-09 |
| NL6809258A (en) | 1969-12-31 |
| FR1572072A (en) | 1969-06-20 |
| NL6709978A (en) | 1969-01-21 |
| CH483721A (en) | 1969-12-31 |
| BE718131A (en) | 1969-01-16 |
| DE1762578B2 (en) | 1978-03-23 |
| DE1762578A1 (en) | 1970-10-01 |
| BE718132A (en) | 1969-01-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |