GB654417A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB654417A GB654417A GB5670/48A GB567048A GB654417A GB 654417 A GB654417 A GB 654417A GB 5670/48 A GB5670/48 A GB 5670/48A GB 567048 A GB567048 A GB 567048A GB 654417 A GB654417 A GB 654417A
- Authority
- GB
- United Kingdom
- Prior art keywords
- target
- electrons
- tube
- screen
- electrode
- 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
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 239000004020 conductor Substances 0.000 abstract 1
- 150000002500 ions Chemical class 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000010445 mica Substances 0.000 abstract 1
- 229910052618 mica group Inorganic materials 0.000 abstract 1
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
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Abstract
654,417. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 25, 1948, No. 5670. Convention date, Sept. 5, 1946. [Class 39 (i)] A fine mesh screen, highly transparent to electrons, is mounted parallel and closelyadjacent to the target of a C.P.S. pick-up tube and is made positive so that electrons in the scanning beam are not substantially decelerated until they have passed the screen and photoelectrons liberated from the target do not return thereto. The grid repels ions produced by electronic collisions. The target assembly in the tube 1 comprises a thin transparent sheet 8, e.g. of mica, with a photo-sensitive mosaic 9 on the gun side and a thin transparent coating of metal 10 on the other side. Focusing and scanning deflection are by the electromagnetic coils 11, 12 but the deflection may be electrostatic. Electrons not landing on the target return to electrode 13 and signals may be taken from conductors attached either to electrode 13 or to the signal plate 10. The wall coating anode 6 extends from the first anode 2 to a point closely adjacent the target. The screen 17 mounted close to the target yields electric lines of force parallel to the axis of the tube. Its spacing from the target is about four tenths of an inch and its mesh 230 wires per inch with 46 per cent open area.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US695013A US2520244A (en) | 1946-09-05 | 1946-09-05 | Television pickup tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB654417A true GB654417A (en) | 1951-06-20 |
Family
ID=24791208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5670/48A Expired GB654417A (en) | 1946-09-05 | 1948-02-25 | Improvements in or relating to cathode ray tubes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2520244A (en) |
| GB (1) | GB654417A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB683603A (en) * | 1948-02-18 | 1952-12-03 | Emi Ltd | Improvements in or relating to electron discharge pick-up tubes suitable for use in television |
| GB675868A (en) * | 1949-08-04 | 1952-07-16 | Emi Ltd | Improvements relating to television or like pick-up tubes |
| US2598919A (en) * | 1950-06-30 | 1952-06-03 | Rca Corp | Barrier grid storage tube |
| US2617954A (en) * | 1950-12-27 | 1952-11-11 | Rca Corp | Pickup tube |
| BE529546A (en) * | 1953-06-13 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2306272A (en) * | 1938-09-29 | 1942-12-22 | Levy Hans Rudolf | Electro-optical relay |
| US2213175A (en) * | 1939-05-27 | 1940-08-27 | Rca Corp | Television transmitting tube and system |
| GB539661A (en) * | 1940-01-15 | 1941-09-19 | Internat Television Corp Ltd | Improvements in or relating to thermionic discharge devices |
-
1946
- 1946-09-05 US US695013A patent/US2520244A/en not_active Expired - Lifetime
-
1948
- 1948-02-25 GB GB5670/48A patent/GB654417A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2520244A (en) | 1950-08-29 |
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