GB350938A - Improvements in vacuum electric tube devices - Google Patents
Improvements in vacuum electric tube devicesInfo
- Publication number
- GB350938A GB350938A GB839830A GB839830A GB350938A GB 350938 A GB350938 A GB 350938A GB 839830 A GB839830 A GB 839830A GB 839830 A GB839830 A GB 839830A GB 350938 A GB350938 A GB 350938A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grid
- class
- silver
- vacuum electric
- potassium
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
- H01J19/28—Non-electron-emitting electrodes; Screens
- H01J19/30—Non-electron-emitting electrodes; Screens characterised by the material
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/002—Chemical composition and manufacture chemical
Landscapes
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
350,938. Thermionic valves. BARTON, F., 41, Glebe Avenue, Enfield, Middlesex, and ASSOCIATED ELECTRICAL INDUSTRIES, Ltd., Bush House, Aldwych, London. March 15, 1930, No. 8398. [Class 39 (i).] The grids of vacuum electric tubes with oxidecoated cathodes are provided with a coating layer of a metal which inherently prevents or reduces grid emission and does not inhibit cathode emission, silver, gold, copper, and lead being examples of such metals. In an example, a molybdenum grid provided with a nickel supporting wire is silverplated in a bath containing a mixed solution of potassium cyanide and potassium silver cyanide. After washing and drying the grid is placed in a vacuum oven at 700‹ C. for thirty minutes. Specification 250,485, [Class 39 (i), Electric lamps, Arcs &c.], is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB839830A GB350938A (en) | 1930-03-15 | 1930-03-15 | Improvements in vacuum electric tube devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB839830A GB350938A (en) | 1930-03-15 | 1930-03-15 | Improvements in vacuum electric tube devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB350938A true GB350938A (en) | 1931-06-15 |
Family
ID=9851765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB839830A Expired GB350938A (en) | 1930-03-15 | 1930-03-15 | Improvements in vacuum electric tube devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB350938A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2470248A (en) * | 1945-05-01 | 1949-05-17 | Hartford Nat Bank & Trust Co | Electron discharge tube with metal foil electrode |
| US2858466A (en) * | 1955-11-25 | 1958-10-28 | Westinghouse Electric Corp | Method of reducing secondary emission from bombarded surfaces |
| US3328625A (en) * | 1964-12-10 | 1967-06-27 | Rca Corp | Small electrode spacing electron tube |
-
1930
- 1930-03-15 GB GB839830A patent/GB350938A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2470248A (en) * | 1945-05-01 | 1949-05-17 | Hartford Nat Bank & Trust Co | Electron discharge tube with metal foil electrode |
| US2858466A (en) * | 1955-11-25 | 1958-10-28 | Westinghouse Electric Corp | Method of reducing secondary emission from bombarded surfaces |
| US3328625A (en) * | 1964-12-10 | 1967-06-27 | Rca Corp | Small electrode spacing electron tube |
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