GB519263A - Improvements in or relating to devices comprising an electric discharge tube giving a visual indication of voltage - Google Patents
Improvements in or relating to devices comprising an electric discharge tube giving a visual indication of voltageInfo
- Publication number
- GB519263A GB519263A GB29357/38A GB2935738A GB519263A GB 519263 A GB519263 A GB 519263A GB 29357/38 A GB29357/38 A GB 29357/38A GB 2935738 A GB2935738 A GB 2935738A GB 519263 A GB519263 A GB 519263A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- diaphragm
- cathode
- electrodes
- relating
- 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
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
519,263. Cathode-ray tubes. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN. Oct. 10, 1938, No. 29357. Convention date, Oct. 13; 1937. [Class 39 (i)] In a tuning or like voltage indicator the electrons from a cathode 2 are formed into beam by two or more electrodes 4, 5 so as to come to a focus in front of a diaphragm 6 ; the orifice may be star-shaped. Further electrodes 7 may be interposed between the diaphragm and a fluorescent screen. The voltage to be indicated -as shown the signal in a receiver-is applied to the electrode 4 and varies the focal point of the beam ; the light spot on the screen may be biggest when the desired tuning condition is reached. The electrode 4 is given a bias negative to the cathode, if the voltage tapping A from the detector 10 is positive, but is given a positive bias if connected to a negative tapping B. The diaphragm may be connected to the electrodes on either side of it and it may have a cylindrical extension partly surrounding the electron path.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL205234X | 1937-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB519263A true GB519263A (en) | 1940-03-20 |
Family
ID=19778514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29357/38A Expired GB519263A (en) | 1937-10-13 | 1938-10-10 | Improvements in or relating to devices comprising an electric discharge tube giving a visual indication of voltage |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2225479A (en) |
| CH (1) | CH205234A (en) |
| FR (1) | FR844672A (en) |
| GB (1) | GB519263A (en) |
| NL (1) | NL50269C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR937437A (en) * | 1946-12-24 | 1948-08-17 | Csf | Variable magnification electron microscope voltage divider |
| FR937296A (en) * | 1947-06-21 | 1948-08-12 | Csf | Improvements to focusing devices, for electron microscopes |
| DE1089485B (en) * | 1952-07-16 | 1960-09-22 | Standard Elektrik Lorenz Ag | Voltage and voltage comparison indicator tubes |
| US2922073A (en) * | 1955-03-22 | 1960-01-19 | Kendon Electronics Inc | Color reproduction systems of the cathode ray tube type |
| US2859378A (en) * | 1956-05-21 | 1958-11-04 | Gen Electric | Electrode system for cathode ray tubes |
| GB1205565A (en) * | 1966-09-28 | 1970-09-16 | Rank Organisation Ltd | Improvements in or relating to electron guns |
-
0
- NL NL50269D patent/NL50269C/xx active
-
1938
- 1938-10-05 US US233362A patent/US2225479A/en not_active Expired - Lifetime
- 1938-10-10 GB GB29357/38A patent/GB519263A/en not_active Expired
- 1938-10-11 CH CH205234D patent/CH205234A/en unknown
- 1938-10-13 FR FR844672D patent/FR844672A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CH205234A (en) | 1939-06-15 |
| NL50269C (en) | |
| US2225479A (en) | 1940-12-17 |
| FR844672A (en) | 1939-07-31 |
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