GB594059A - Improvements in thermionic cathodes - Google Patents
Improvements in thermionic cathodesInfo
- Publication number
- GB594059A GB594059A GB1616845A GB1616845A GB594059A GB 594059 A GB594059 A GB 594059A GB 1616845 A GB1616845 A GB 1616845A GB 1616845 A GB1616845 A GB 1616845A GB 594059 A GB594059 A GB 594059A
- Authority
- GB
- United Kingdom
- Prior art keywords
- minutes
- tungsten
- molybdenum
- carbonate
- calcium carbonate
- 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
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/14—Solid thermionic cathodes characterised by the material
Landscapes
- Solid Thermionic Cathode (AREA)
Abstract
594,059. Cathode materials and processing. GENERAL ELECTRIC CO., Ltd., ROOKSBY,H.P., NOBLE, S. H., BRANSON, W. G. S., and HERRIOTT, J. S. June 25, 1945, No. 16168. Addition to 577,599. [Class 39 (i)] A thermionic cathode according to the parent Specification and comprising activating material consisting mainly of barium thorate contains in addition tungsten and/or molybdenum. The material is prepared by adding 3 per cent of tungsten by weight to a mixture of barium carbonate, calcium carbonate and thoria in the molecular proportions of 2.5 : 1 : 2.5 respectively, mixing with a binder such as gum tragacanth and extruding in the form of rods..It is then heated to 1600‹ C. in an atmosphere of hydrogen in 7 minutes, kept at this temperature for 10 minutes and cooled to room temperature in a further 10 minutes. In this example the tungsten may be replaced wholly or in part by molybdenum and the calcium carbonate wholly or in part by strontium carbonate.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE460538D BE460538A (en) | 1944-01-19 | ||
| NL63477D NL63477C (en) | 1944-01-19 | ||
| US574814A US2394095A (en) | 1944-01-19 | 1945-01-26 | Activated electrode |
| MY61/53A MY5300061A (en) | 1944-01-19 | 1953-12-30 | Improvements in thremidnic cathodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB594059A true GB594059A (en) | 1947-10-31 |
Family
ID=1732108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1616845A Expired GB594059A (en) | 1944-01-19 | 1945-06-25 | Improvements in thermionic cathodes |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB594059A (en) |
-
1945
- 1945-06-25 GB GB1616845A patent/GB594059A/en not_active Expired
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