GB535866A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB535866A GB535866A GB31101/39A GB3110139A GB535866A GB 535866 A GB535866 A GB 535866A GB 31101/39 A GB31101/39 A GB 31101/39A GB 3110139 A GB3110139 A GB 3110139A GB 535866 A GB535866 A GB 535866A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mosaic
- enamel
- electrons
- screen
- gun
- 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
- 210000003298 dental enamel Anatomy 0.000 abstract 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 239000011248 coating agent Substances 0.000 abstract 2
- 238000000576 coating method Methods 0.000 abstract 2
- 230000003287 optical effect Effects 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 abstract 1
- 229910001634 calcium fluoride Inorganic materials 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 abstract 1
- 229910001610 cryolite Inorganic materials 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000001704 evaporation Methods 0.000 abstract 1
- 238000007689 inspection Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 239000010453 quartz Substances 0.000 abstract 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 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
- H01J31/40—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having grid-like image screen through which the electron ray passes and by which the ray is influenced before striking the output electrode, i.e. having "triode action"
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
535,866. Cathode-ray tubes ; photo cells. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Nov. 29, 1939, No. 31101. Convention date, Nov. 30, 1938. [Class 39 (i)] In a cathode ray tube for generating television signals the mosaic screen consists of a wire mesh 12 coated with enamel 14 on one side only leaving square openings 13 ; photo sensitive discrete elements 15 are formed on this enamel. On the uninsulated side of the mesh a coating 17 is applied giving good secondary emission. The screen is scanned by a beam with high velocity electrons. An optical image focused on the elements 15 produces a charge image corresponding to the optical one. An anode 16 is placed on the side of the screen remote from the gun 5. The high velocity electrons generate secondaries on the coating 17, which are drawn through the openings 13 by the anode 16 under control of the charge image on the mosaic. The diameter of the scanning spot is equal to the width of the elementary line into which the picture is divided. The mosaic screen may be formed on a perforated metal sheet of nickel acid etched ; after cleaning the enamel may be projected thereon from below so that only one side is coated. The enamel may be applied in several thin coats, the foundation being fired after each coat. Quartz, cryolite or calcium fluoride may be deposited on the mesh 12 by evaporation. In a modification the electron gun and associated focusing and scanning means may be replaced by a photo-electric cathode scanned by a light-beam to generate scanning electrons for the mosaic, which electrons pass through the perforations. The Specification as open to inspection under Sect. 91 states that low velocity electrons may be projected from the gun, these passing through the perforations under control of the mosaic. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specification 510,696.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US243159A US2240186A (en) | 1938-11-30 | 1938-11-30 | Electron discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB535866A true GB535866A (en) | 1941-04-24 |
Family
ID=22917572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB31101/39A Expired GB535866A (en) | 1938-11-30 | 1939-11-29 | Improvements in or relating to electron discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2240186A (en) |
| GB (1) | GB535866A (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2444221A (en) * | 1942-09-25 | 1948-06-29 | Invex Inc | Television system |
| US2458205A (en) * | 1946-09-27 | 1949-01-04 | Rca Corp | Televison pickup tube |
| US2495042A (en) * | 1947-11-12 | 1950-01-17 | Remington Rand Inc | Two-sided mosaic and method of manufacturing same |
| GB646458A (en) * | 1947-12-12 | 1950-11-22 | Cinema Television Ltd | Improvements in or relating to cathode ray tubes |
| US2572497A (en) * | 1948-11-30 | 1951-10-23 | Rca Corp | Making fine mesh silica screens |
| DE969595C (en) * | 1951-10-09 | 1958-06-19 | Siemens Ag | Storage television receiving tube |
| US2798179A (en) * | 1952-01-23 | 1957-07-02 | Sheldon Edward Emanuel | System for reproducing invisible images |
| US2788466A (en) * | 1952-07-17 | 1957-04-09 | Hughes Aircraft Co | Direct-viewing storage tube |
| US2878416A (en) * | 1953-08-10 | 1959-03-17 | Pye Ltd | Television camera tubes |
| US2788467A (en) * | 1954-02-09 | 1957-04-09 | Hughes Aircraft Co | Direct-viewing storage tube |
| US2824249A (en) * | 1954-02-09 | 1958-02-18 | Hughes Aircraft Co | Storage grid for direct-viewing storage tubes |
| US2971117A (en) * | 1956-03-01 | 1961-02-07 | Rca Corp | Color-kinescopes, etc. |
| US3031597A (en) * | 1957-12-18 | 1962-04-24 | Itt | Information storage display tube and storage screen assembly therefor |
| US2898490A (en) * | 1957-12-23 | 1959-08-04 | Gen Electric | Target plate |
-
1938
- 1938-11-30 US US243159A patent/US2240186A/en not_active Expired - Lifetime
-
1939
- 1939-11-29 GB GB31101/39A patent/GB535866A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2240186A (en) | 1941-04-29 |
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