GB435623A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB435623A GB435623A GB9473/34A GB947334A GB435623A GB 435623 A GB435623 A GB 435623A GB 9473/34 A GB9473/34 A GB 9473/34A GB 947334 A GB947334 A GB 947334A GB 435623 A GB435623 A GB 435623A
- Authority
- GB
- United Kingdom
- Prior art keywords
- modulating
- cathode
- electrode
- voltage
- tapping
- 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/52—Arrangements for controlling intensity of ray or beam, e.g. for modulation
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
435,623. Television. BROADWAY, L. F., 6, King's Avenue, Ealing, and TEDHAM, W. F., 267, Woolwich Road, Abbey Wood, both in London. March 26, 1934, No. 9473. [Class 40 (iii)] The characteristic, representing the relation of the modulating-voltage to the fluorescentscreen current in a cathode-ray tube, is varied without altering the disposition of the electrodes 2-7. The tube has accelerating electrodes 4, 6 before and after the modulating-electrode 5, as described in Specification 431,327. A variable resistance 16 is inserted between the accelerating-electrode 4 and its tapping 17 on the supply potentiometer 10, 11. The tapping is adjustable, preferably simultaneously with variation of the resistance 16. According to a modification, the modulating voltage is applied to a variable extent to both the controlling electrode and the screen 3 round the cathode 2, Fig. 2 (not shown). The bias on the controlling grid and the cathode screen is adjustable, preferably simultaneously with variation of amount of the modulating-voltage applied.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9473/34A GB435623A (en) | 1934-03-26 | 1934-03-26 | Improvements in or relating to cathode ray tubes |
| US12214A US2194380A (en) | 1934-03-26 | 1935-03-21 | Cathode ray tube |
| FR787744D FR787744A (en) | 1934-03-26 | 1935-03-22 | Improvements to cathode ray tubes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9473/34A GB435623A (en) | 1934-03-26 | 1934-03-26 | Improvements in or relating to cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB435623A true GB435623A (en) | 1935-09-25 |
Family
ID=9872634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9473/34A Expired GB435623A (en) | 1934-03-26 | 1934-03-26 | Improvements in or relating to cathode ray tubes |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2194380A (en) |
| FR (1) | FR787744A (en) |
| GB (1) | GB435623A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE475602A (en) * | 1946-08-23 | |||
| US2852716A (en) * | 1954-07-14 | 1958-09-16 | Gen Electric | Cathode ray tube and electron gun therefor |
| US3004186A (en) * | 1958-09-17 | 1961-10-10 | Zenith Radio Corp | Cathode-ray tube arrangement |
| US3015752A (en) * | 1959-03-09 | 1962-01-02 | Admiral Corp | Flash-over suppression in cathode ray tubes |
-
1934
- 1934-03-26 GB GB9473/34A patent/GB435623A/en not_active Expired
-
1935
- 1935-03-21 US US12214A patent/US2194380A/en not_active Expired - Lifetime
- 1935-03-22 FR FR787744D patent/FR787744A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2194380A (en) | 1940-03-19 |
| FR787744A (en) | 1935-09-27 |
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