GB491292A - Improvements in or relating to cathode ray television transmitter tubes - Google Patents
Improvements in or relating to cathode ray television transmitter tubesInfo
- Publication number
- GB491292A GB491292A GB2192/38A GB219238A GB491292A GB 491292 A GB491292 A GB 491292A GB 2192/38 A GB2192/38 A GB 2192/38A GB 219238 A GB219238 A GB 219238A GB 491292 A GB491292 A GB 491292A
- Authority
- GB
- United Kingdom
- Prior art keywords
- particles
- silver
- coated
- film
- fluoride
- 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
- 239000002245 particle Substances 0.000 abstract 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 abstract 4
- 229910052709 silver Inorganic materials 0.000 abstract 4
- 239000004332 silver Substances 0.000 abstract 4
- 239000010445 mica Substances 0.000 abstract 3
- 229910052618 mica group Inorganic materials 0.000 abstract 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 229910052792 caesium Inorganic materials 0.000 abstract 2
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 2
- 238000010438 heat treatment Methods 0.000 abstract 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract 2
- NDVLTYZPCACLMA-UHFFFAOYSA-N silver oxide Chemical compound [O-2].[Ag+].[Ag+] NDVLTYZPCACLMA-UHFFFAOYSA-N 0.000 abstract 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 abstract 2
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 abstract 2
- 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
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 239000004020 conductor Substances 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
- 239000011810 insulating material Substances 0.000 abstract 1
- 238000009413 insulation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 229910052759 nickel Inorganic materials 0.000 abstract 1
- 229910052697 platinum Inorganic materials 0.000 abstract 1
- 229910001923 silver oxide Inorganic materials 0.000 abstract 1
- 235000013024 sodium fluoride Nutrition 0.000 abstract 1
- 239000011775 sodium fluoride Substances 0.000 abstract 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract 1
- 229910052721 tungsten Inorganic materials 0.000 abstract 1
- 239000010937 tungsten Substances 0.000 abstract 1
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
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
- H01J29/36—Photoelectric screens; Charge-storage screens
- H01J29/39—Charge-storage screens
- H01J29/43—Charge-storage screens using photo-emissive mosaic, e.g. for orthicon, for iconoscope
Landscapes
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
491,292. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Jan. 22, 1938, No. 2192. Convention date, March 30, 1937. [Class 39 (i)] The mosaic structure of a cathode-ray tube comprises a nonconduc tive base with a thir layer of insulating ma terial flashed on one side thereof in vacuo and minute separated photosensitive particles on the thin layer there being a layer of conducting material on the opposite side of the base. In the form shown, a sheet of mica 14 is coated on the underside with a film of platinum 15 and on the other side with a film of cryolite, calcium fluoride or sodium fluoride 16. The film of fluoride &c. is then dusted with silver oxide then reduced by heating to minute separated particles of silver. Alternatively the silver may be applied as a metallic film which is then broken up into particles by heat treatment. The coated mica sheet is then mounted in the tube envelope which is evacuated and the silver particles oxidized and exposed to caesium vapour. The tube is then baked and any caesium deposited between the particles is taken up by a stannic oxide getter. The particles may finally be given a thin coating of nickel or silver by evaporation from an appropriately coated filament in the tube. The mica is coated with insulation by mounting it in an envelope containing a tungsten filament which has been coated with the fluoride or other insulating material, the container then being evacuated and the filament heated to flash off the material.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US133899A US2178232A (en) | 1937-03-30 | 1937-03-30 | Cathode ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB491292A true GB491292A (en) | 1938-08-30 |
Family
ID=22460810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2192/38A Expired GB491292A (en) | 1937-03-30 | 1938-01-22 | Improvements in or relating to cathode ray television transmitter tubes |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2178232A (en) |
| CH (1) | CH203272A (en) |
| FR (1) | FR835007A (en) |
| GB (1) | GB491292A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2533387A (en) * | 1948-11-16 | 1950-12-12 | Nat Union Radio Corp | Method and apparatus for making dynodes |
| US2700626A (en) * | 1949-12-09 | 1955-01-25 | Bell Telephone Labor Inc | Secondary electron emissive electrodes |
| US3195971A (en) * | 1961-01-05 | 1965-07-20 | Sylvania Electric Prod | Process for removing electrically conductive coatings from ceramics |
-
1937
- 1937-03-30 US US133899A patent/US2178232A/en not_active Expired - Lifetime
-
1938
- 1938-01-22 GB GB2192/38A patent/GB491292A/en not_active Expired
- 1938-03-09 FR FR835007D patent/FR835007A/en not_active Expired
- 1938-03-28 CH CH203272D patent/CH203272A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| US2178232A (en) | 1939-10-31 |
| FR835007A (en) | 1938-12-09 |
| CH203272A (en) | 1939-02-28 |
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