GB657633A - Improvements relating to circuit arrangements comprising a television transmission tube - Google Patents
Improvements relating to circuit arrangements comprising a television transmission tubeInfo
- Publication number
- GB657633A GB657633A GB1921948A GB1921948A GB657633A GB 657633 A GB657633 A GB 657633A GB 1921948 A GB1921948 A GB 1921948A GB 1921948 A GB1921948 A GB 1921948A GB 657633 A GB657633 A GB 657633A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- target
- potential
- multiplier
- 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
- 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
- H01J31/26—Image pick-up tubes having an input of visible light and electric output
- H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
- H01J31/34—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at cathode potential, e.g. orthicon
- H01J31/38—Tubes with photoconductive screen, e.g. vidicon
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
657,633. Cathode-ray tubes. ELECTRIC & MUSICAL INDUSTRIES, Ltd. July 17, 1948, No. 19219. [Class 39 (i)] A cathode-potential-stabilized television transmitting tube with an electrode 15 close to the scanned side of the target 6 maintained at a positive potential with reference to the equilibrium potential of the target has means for removing from the signal stream returning to the output multiplier 11, those secondary electrons liberated from said electrode 15, comprising a fine mesh electrode 17 preferably in front of the multiplier with a potential intermediate that of the electrode 15 and the target. The low velocity electron stream from gun 2 passes through lift plates 14 and through a stabilizing electrode 15 of fine mesh to target 6, those electrons not contacting the target returning via lift plates 14 to the multiplier. The secondary electrons from electrode 15 are turned back from the multiplier because the potential of electrode 11 is less positive than that of electrode 15. Potentiometers 21, 23, 25 apply the appropriate potentials to the electrodes. The stabilizing electrode 15 is connected to the signal plate 7, but it may be separately energized, or the signal plate may be dispensed with. The target may be a photo-sensitive mosaic screen or one receiving an electron image from a photo cathode. Specifications 657,666 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1921948A GB657633A (en) | 1948-07-17 | 1948-07-17 | Improvements relating to circuit arrangements comprising a television transmission tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1921948A GB657633A (en) | 1948-07-17 | 1948-07-17 | Improvements relating to circuit arrangements comprising a television transmission tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB657633A true GB657633A (en) | 1951-09-26 |
Family
ID=10125706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1921948A Expired GB657633A (en) | 1948-07-17 | 1948-07-17 | Improvements relating to circuit arrangements comprising a television transmission tube |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB657633A (en) |
-
1948
- 1948-07-17 GB GB1921948A patent/GB657633A/en not_active Expired
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