GB361560A - Improvements in or relating to methods of manufacturing electron emitting coated cathodes - Google Patents
Improvements in or relating to methods of manufacturing electron emitting coated cathodesInfo
- Publication number
- GB361560A GB361560A GB32643/30A GB3264330A GB361560A GB 361560 A GB361560 A GB 361560A GB 32643/30 A GB32643/30 A GB 32643/30A GB 3264330 A GB3264330 A GB 3264330A GB 361560 A GB361560 A GB 361560A
- Authority
- GB
- United Kingdom
- Prior art keywords
- barium
- wire
- oxide
- salts
- coating
- 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
- H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
- H01J9/02—Manufacture of electrodes or electrode systems
- H01J9/04—Manufacture of electrodes or electrode systems of thermionic cathodes
- H01J9/042—Manufacture, activation of the emissive part
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
361,560. Thermionic cathodes; electrolysis. ALLGEMEINE ELEKTRICITATS-GES., 2, Friedrich Karl-Ufer, Berlin. Oct. 30, 1930, No. 32643. Convention date, Nov. 8, 1929. [Class 39 (i).] An oxide-coated cathode is produced by converting the surface of a tungsten wire electrolytically into barium tungstate and then reducing the surface in an alkaline bath to barium oxide or carbonate ; the wire is preferably oxidized before such treatment. The wire may be subjected to anodic treatment in a baryta lye. The Specification as open to inspection under Sect. 91 (3) (a) comprises also the use of an electrolyte consisting of neutral salts of barium alone or with other salts together with carbonic or oxalic acid forming insoluble salts. A coating of thorium oxide may be produced. A coating of copper may be applied to the treated surface. This subjectmatter does not appear in the Specification as accepted.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE361560X | 1929-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB361560A true GB361560A (en) | 1931-11-26 |
Family
ID=6300433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32643/30A Expired GB361560A (en) | 1929-11-08 | 1930-10-30 | Improvements in or relating to methods of manufacturing electron emitting coated cathodes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB361560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2512141A (en) * | 1945-06-14 | 1950-06-20 | Westinghouse Electric Corp | Coating articles with molybdenum |
-
1930
- 1930-10-30 GB GB32643/30A patent/GB361560A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2512141A (en) * | 1945-06-14 | 1950-06-20 | Westinghouse Electric Corp | Coating articles with molybdenum |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2231373A (en) | Coating of articles of aluminum or aluminum alloys | |
| US2336846A (en) | Etching of capacitor armatures | |
| GB361560A (en) | Improvements in or relating to methods of manufacturing electron emitting coated cathodes | |
| GB226536A (en) | A process of electrolytically depositing an insulating coating or skin on aluminium | |
| GB1070190A (en) | Electrolytic polishing of metals | |
| GB642766A (en) | Improvements relating to magnetron-cavity structures | |
| US2239954A (en) | Cathode for electron discharge tubes | |
| US1929486A (en) | Dyeing oxidized aluminum | |
| US2313454A (en) | Electrodeposition of cuprous oxides and baths therefor | |
| US1809229A (en) | Electric discharge tube | |
| US2465773A (en) | Process of producing a catalytic article | |
| GB406431A (en) | Method of producing high emission thermionic cathodes | |
| GB292131A (en) | Process for preventing the occurrence of excess voltages in electrolytic cells for the electrolysis of water | |
| US2348826A (en) | Coating of objects of magnesium or the like with oxides | |
| DE510380C (en) | Process for coloring metals | |
| Peirce | The Separation of Columbium and Tantalum | |
| GB397538A (en) | Improvements in and relating to the preparation of aluminium or aluminium alloy anodes for electrolytic condensers and rectifiers | |
| DE920186C (en) | Process for the electrochemical oxidation of o-toluenesulfamide to benzoic acid sulfimide | |
| SU60230A1 (en) | Method for electrolytic copper deposition on iron and other metals | |
| US1857752A (en) | Electrolytic production of tin from alkali stannate or alkali stannite lyes | |
| US1417413A (en) | Coloration of metallic surfaces | |
| GB423039A (en) | Method of producing high-emission thermionic cathodes | |
| US1970076A (en) | Electrolytic process for the manufacture of chemical compounds | |
| GB363054A (en) | Electrolytic process for the manufacture of chemical compounds | |
| US2616841A (en) | Process of reducing cuprous oxide coatings to produce patterns or designs, and baths for use in the process |