GB1211898A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB1211898A GB1211898A GB2975568A GB2975568A GB1211898A GB 1211898 A GB1211898 A GB 1211898A GB 2975568 A GB2975568 A GB 2975568A GB 2975568 A GB2975568 A GB 2975568A GB 1211898 A GB1211898 A GB 1211898A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- capacitance
- gun
- electrode
- cathode
- 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
- H01J29/96—One or more circuit elements structurally associated with the tube
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
1,211,898. Cathode-ray tubes. M-O VALVE CO. Ltd. 2 June, 1969 [21 June, 1968], No. 29755/68. Heading H1D. A cathode-ray tube with a target which may be a luminescent screen includes a conductive area on the internal surface of the envelope e.g. coatings 5 and 6, connected to electron gun electrodes 9 and 11 and coating 14 for example, at least part of the area forming a capacitance with a conductive material e.g. coating 18, on the external surface of the envelope. The capacitance is normally part of a smoothing circuit for the potential to a gun electrode. At least part of the internal conductor is resistive and of generally helical form so as to provide a resistance between the capacitance and gun electrode, particularly to limit the current to modulating electrode 12 in the event, of flashovers between the gun electrodes. Helical carbon coating 16 may be of at least 1000 ohms resistance and is connected to graphite coatings 6 and 14. Aluminium coating 5 extends two thirds the length of the bulb 1. Coating 16 and the uncoated surface of neck 2 may be coated with chromic oxide as a protection against electrostatic charging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2975568A GB1211898A (en) | 1968-06-21 | 1968-06-21 | Improvements in or relating to cathode ray tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2975568A GB1211898A (en) | 1968-06-21 | 1968-06-21 | Improvements in or relating to cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1211898A true GB1211898A (en) | 1970-11-11 |
Family
ID=10296655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2975568A Expired GB1211898A (en) | 1968-06-21 | 1968-06-21 | Improvements in or relating to cathode ray tubes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1211898A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2220093A1 (en) * | 1973-02-21 | 1974-09-27 | Philips Nv | |
| DE3009459A1 (en) * | 1980-03-12 | 1981-09-17 | Videocolor GmbH, 7900 Ulm | CATHODE RAY TUBE |
-
1968
- 1968-06-21 GB GB2975568A patent/GB1211898A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2220093A1 (en) * | 1973-02-21 | 1974-09-27 | Philips Nv | |
| DE3009459A1 (en) * | 1980-03-12 | 1981-09-17 | Videocolor GmbH, 7900 Ulm | CATHODE RAY TUBE |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |