GB1295875A - - Google Patents
Info
- Publication number
- GB1295875A GB1295875A GB1295875DA GB1295875A GB 1295875 A GB1295875 A GB 1295875A GB 1295875D A GB1295875D A GB 1295875DA GB 1295875 A GB1295875 A GB 1295875A
- Authority
- GB
- United Kingdom
- Prior art keywords
- seal
- extend
- frame
- tube
- faceplate
- 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
-
- 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
- H01J29/86—Vessels; Containers; Vacuum locks
- H01J29/88—Vessels; Containers; Vacuum locks provided with coatings on the walls thereof; Selection of materials for the coatings
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
1295875 Colour television tubes TELEFUNKEN PATENTVERWERTUNGSGESELLSCHAFT mbH 2 Dec 1969 [4 Dec 1968 14 June 1969] 58850/69 Heading H1D A colour television tube comprising a faceplate 1 sealed to a cone 7 by a glass solder 6 is provided with means for preventing at least part of the seal from being charged by the beam. When the tube includes a rectangular shadow mask 3 attached to a frame 4 a screen 13 may be attached to the frame to protect the seal 6 from electron bombardment. The screen 13 may be provided only at the four corners or may extend all round, and a flange may extend to the envelope, as shown in Fig. 6, to prevent electrons from passing round the side of the shadow mask. An alternative method of preventing the seal from charging consists in making the seal of conductive material, or of providing a conductive coating over the seal to extend between the usual conductive coatings provided on the faceplate and on the cone. Such a coating may be provided by means of an evaporator on the frame 4 which is fired like a getter. Alternatively an evaporator may be introduced into the neck of the tube to evaporate aluminium over the seal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19681812585 DE1812585A1 (en) | 1968-12-04 | 1968-12-04 | Cathode ray tube with a front plate made of glass |
| DE19696923823 DE6923823U (en) | 1969-06-14 | 1969-06-14 | SCREENING DEVICE ATTACHED TO THE MASK FRAME OF A COLOR TUBE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1295875A true GB1295875A (en) | 1972-11-08 |
Family
ID=25756540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1295875D Expired GB1295875A (en) | 1968-12-04 | 1969-12-02 |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE1812585A1 (en) |
| FR (1) | FR2025222A1 (en) |
| GB (1) | GB1295875A (en) |
-
1968
- 1968-12-04 DE DE19681812585 patent/DE1812585A1/en active Pending
-
1969
- 1969-12-02 GB GB1295875D patent/GB1295875A/en not_active Expired
- 1969-12-03 FR FR6941775A patent/FR2025222A1/fr not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| FR2025222A1 (en) | 1970-09-04 |
| DE1812585A1 (en) | 1971-07-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |