GB792021A - Tuning indicator tube - Google Patents
Tuning indicator tubeInfo
- Publication number
- GB792021A GB792021A GB3306455A GB3306455A GB792021A GB 792021 A GB792021 A GB 792021A GB 3306455 A GB3306455 A GB 3306455A GB 3306455 A GB3306455 A GB 3306455A GB 792021 A GB792021 A GB 792021A
- Authority
- GB
- United Kingdom
- Prior art keywords
- strips
- filter
- fluorescent
- colours
- screen
- 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
- H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
- H01J31/14—Magic-eye or analogous tuning indicators
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
792,021. Cathode ray tubes. STANDARD TELEPHONES & CABLES, Ltd. Nov. 18, 1955 [Nov. 23, 1954], No. 33064/55. Class 39(1). In a tuning indicator the fluorescent screen consists of a plurality of portions of different colours or a filter having strips of different colours is arranged covering the fluorescent screen to give the same visual effect, the screen comprising an optically transparent anode having a fluorescent coating. In one form, Fig. 1, which is a tuning indicator of the thermometer type, i.e., the length of the luminous trace varies with the voltage on deflecting electrode 4, cooperating with grid 3 and cathode 2, an optical filter is arranged outside the tube wall. The filter comprises three differently coloured strips, e.g., red, blue and green or any other suitable number of strips, preferably including all the basic colours. The colour transition between strips can be sharp or gradual. Preferably the filter contains all the colours of the visible spectrum. The screen structure comprises a transparent conductive layer 6 which may be of tin oxide produced from vapours or solutions of tin chloride or metal evaporated or otherwise deposited &c., and phosphor layer 5, e.g., of white light-emitting ZnO. If the fluorescent layer 5 is made up of phosphor strips of different colours the filter arrangement is dispensed with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3306455A GB792021A (en) | 1955-11-18 | 1955-11-18 | Tuning indicator tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3306455A GB792021A (en) | 1955-11-18 | 1955-11-18 | Tuning indicator tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB792021A true GB792021A (en) | 1958-03-19 |
Family
ID=6705740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3306455A Expired GB792021A (en) | 1955-11-18 | 1955-11-18 | Tuning indicator tube |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB792021A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827182A (en) * | 1988-02-02 | 1989-05-02 | Thomson Electron Tubes And Devices Corporation | CRT with elongated envelope having non-coaxial portions |
| US4827183A (en) * | 1988-02-02 | 1989-05-02 | Thomson Electron Tubes & Devices Corporation | CRT with means for monitoring electron beam |
-
1955
- 1955-11-18 GB GB3306455A patent/GB792021A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4827182A (en) * | 1988-02-02 | 1989-05-02 | Thomson Electron Tubes And Devices Corporation | CRT with elongated envelope having non-coaxial portions |
| US4827183A (en) * | 1988-02-02 | 1989-05-02 | Thomson Electron Tubes & Devices Corporation | CRT with means for monitoring electron beam |
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