GB540034A - Improvements in cathode ray tubes - Google Patents
Improvements in cathode ray tubesInfo
- Publication number
- GB540034A GB540034A GB9933/40A GB993340A GB540034A GB 540034 A GB540034 A GB 540034A GB 9933/40 A GB9933/40 A GB 9933/40A GB 993340 A GB993340 A GB 993340A GB 540034 A GB540034 A GB 540034A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- deflecting
- tube
- plates
- 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
- H01J31/26—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
Abstract
540,034. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. June 6, 1940, No. 9933. Convention date, June 6, 1939. [Class 39 (i)] In a cathode ray tube in which the ray is focused by a longitudinal magnetic field on to a screen over which it is scanned a collecting electrode for secondary electrons emitted from the screen or primary electrons reflected by it is arranged at an angle to the axis of the tube between the gun and the deflecting electrodes ; intercepting electrodes may also be provided between the collecting electrode and the deflecting electrodes and between the deflecting electrodes and the screen. The Figure shows a tube with a mosaic screen 2 of the ordinary type for television transmission. The collecting electrode 18 is arranged as shown, and has a central opening 19 for the passage of the ray. The tube is enclosed in a deflecting coil 8 and scanning at right angles to the plane of the paper is produced by deflecting plates 14, 15, shaped as shown, in conjunction with the magnetic field. Scanning in the other direction is effected by coils 16, 17 or by electrostatic deflecting plates. Between the electrodes 18 and the plates 14, 15 and also between the plates and the screen are arranged intercepting electrodes 20, 21 with slots 22, 23 for the passage of the ray. These electrodes are earthed and may be connected to a metallic lining 26 of the tube. It is stated that the ensuing screening of the space between the plates 14, 15 reduces distortion.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US277582A US2213176A (en) | 1939-06-06 | 1939-06-06 | Television transmitting tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB540034A true GB540034A (en) | 1941-10-02 |
Family
ID=23061501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9933/40A Expired GB540034A (en) | 1939-06-06 | 1940-06-06 | Improvements in cathode ray tubes |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2213176A (en) |
| FR (1) | FR865908A (en) |
| GB (1) | GB540034A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2454378A (en) * | 1945-05-28 | 1948-11-23 | Rca Corp | Cathode-ray tube apparatus |
| US2908837A (en) * | 1956-08-22 | 1959-10-13 | Bendix Aviat Corp | Anode structure |
| US3432711A (en) * | 1966-07-05 | 1969-03-11 | Itt | Hybrid deflection image dissector having concave deflection plates converging at horizontal edges of resolving apertures |
| FR2034981A1 (en) * | 1969-03-17 | 1970-12-18 | Jeol Ltd | |
| US5442263A (en) * | 1994-08-23 | 1995-08-15 | David Sarnoff Research Center, Inc. | Dynamic electrostatic and magnetic focusing apparatus for a cathode ray tube |
-
1939
- 1939-06-06 US US277582A patent/US2213176A/en not_active Expired - Lifetime
-
1940
- 1940-05-30 FR FR865908D patent/FR865908A/en not_active Expired
- 1940-06-06 GB GB9933/40A patent/GB540034A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2213176A (en) | 1940-08-27 |
| FR865908A (en) | 1941-06-09 |
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