GB1048409A - Tuning indicator tubes - Google Patents
Tuning indicator tubesInfo
- Publication number
- GB1048409A GB1048409A GB4032365A GB4032365A GB1048409A GB 1048409 A GB1048409 A GB 1048409A GB 4032365 A GB4032365 A GB 4032365A GB 4032365 A GB4032365 A GB 4032365A GB 1048409 A GB1048409 A GB 1048409A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- screen
- stereophonic
- control
- sept
- 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
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
1,048,409. Tuning indicators. INTERNATIONAL STANDARD ELECTRIC CORPORATION. Sept. 22, 1965 [Sept. 22, 1964], No. 40323/65. Heading H1D. In a voltage-indicator tube for a stereophonic receiver, electrons projected from the cathode 3 towards the screen 2 are divided into three beams by the electrodes 13, 14, the two outer beams being subject to the control of plate electrodes 9 and 10, and the centre beam to the control of rod electrodes 11, 11a, to which a signal dependent upon the presence and intensity of a stereophonic component in the received signal is applied, the electrode geometry being such that only when the latter component is of sufficient strength to ensure satisfactory stereophonic reception is the centre beam permitted to strike the screen. Cathode 3 is surrounded by a grid 4 which is supported by three struts 4a which act as shields, and enclose control electrodes 5 and 6, to which voltages representative of the difference and sum, respectively, of the left and right stereophonic channels are applied, whereby amplified signals are produced on anodes 7 and 8, which are connected, respectively, to deflection electrodes 11, 11a and 9, 10. Electrode 12 is connected to a conductive tin oxide layer included in the screen, portions 18 and 19 preventing the impingement of secondary electrons upon the screen, and the angled inner edges 20, 21 improving the deflection sensitivity of electrodes 9, 10. A colour filter may be provided for the central beam. In an alternative embodiment (Fig. 5, not shown) electrodes 9 and 10 are of rod form, and electrodes 11, 11a are plates mounted parallel to electrodes 13, 14.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1964ST022701 DE1240592B (en) | 1964-09-22 | 1964-09-22 | Display tubes with several deflection electrodes to which separate display voltages are applied |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1048409A true GB1048409A (en) | 1966-11-16 |
Family
ID=7459486
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4032365A Expired GB1048409A (en) | 1964-09-22 | 1965-09-22 | Tuning indicator tubes |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE1240592B (en) |
GB (1) | GB1048409A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2144575A (en) * | 1983-08-05 | 1985-03-06 | English Electric Valve Co Ltd | Cathedolumanescent display arrangements |
-
1964
- 1964-09-22 DE DE1964ST022701 patent/DE1240592B/en active Pending
-
1965
- 1965-09-22 GB GB4032365A patent/GB1048409A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2144575A (en) * | 1983-08-05 | 1985-03-06 | English Electric Valve Co Ltd | Cathedolumanescent display arrangements |
US4695765A (en) * | 1983-08-05 | 1987-09-22 | English Electric Valve Company Limited | Display arrangements |
Also Published As
Publication number | Publication date |
---|---|
DE1240592B (en) | 1967-05-18 |
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