GB538479A - Cathodes for electron discharge devices and alloys therefor - Google Patents
Cathodes for electron discharge devices and alloys thereforInfo
- Publication number
- GB538479A GB538479A GB1957/40A GB195740A GB538479A GB 538479 A GB538479 A GB 538479A GB 1957/40 A GB1957/40 A GB 1957/40A GB 195740 A GB195740 A GB 195740A GB 538479 A GB538479 A GB 538479A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- discharge devices
- electron discharge
- cathodes
- alloys
- 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
- H01J1/14—Solid thermionic cathodes characterised by the material
- H01J1/146—Solid thermionic cathodes characterised by the material with metals or alloys as an emissive material
Landscapes
- Electrolytic Production Of Metals (AREA)
- Solid Thermionic Cathode (AREA)
Abstract
538,479. Alloys. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Feb. 1, 1940, No. 1957. Convention date, Feb. 1, 1939. Addition to 534,154. [Class 82 (i)] An alloy particularly for the core of an oxidecoated cathode for electron discharge devices consists of nickel containing more than 0.8 per cent. of cobalt and 0À02-0À05 per cent. of carbon, and free from materials capable of reducing the oxides of the coating. The range of cobalt may be up to 40 per cent., preferably 1-10 per cent. U.S.A. Specifications 2,029,482 and 2,072,576 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US254045A US2192491A (en) | 1939-02-01 | 1939-02-01 | Cathode for electron discharge devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB538479A true GB538479A (en) | 1941-08-06 |
Family
ID=22962719
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1957/40A Expired GB538479A (en) | 1939-02-01 | 1940-02-01 | Cathodes for electron discharge devices and alloys therefor |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2192491A (en) |
| GB (1) | GB538479A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2650999A (en) * | 1950-04-11 | 1953-09-01 | Zenith Radio Corp | Cathode structure for electron-discharge devices |
| US2753283A (en) * | 1951-06-30 | 1956-07-03 | Rca Corp | Method of making nickel-carbon alloy sleeves |
| US2744838A (en) * | 1951-11-03 | 1956-05-08 | Gen Electric | Electron discharge device cathode and method of making same |
| US2778970A (en) * | 1952-06-07 | 1957-01-22 | Rca Corp | Core alloy for indirectly heated cathodes |
| US2830917A (en) * | 1954-06-07 | 1958-04-15 | Bell Telephone Labor Inc | Cathode for electron discharge devices |
| NL202927A (en) * | 1954-12-23 | |||
| US2965793A (en) * | 1959-05-12 | 1960-12-20 | Westinghouse Electric Corp | Electron device |
| US3454748A (en) * | 1967-06-09 | 1969-07-08 | Westinghouse Electric Corp | Variable resistance heating element |
| NL158647B (en) * | 1973-06-06 | 1978-11-15 | Philips Nv | OXYD CATHOD FOR AN ELECTRIC DISCHARGE TUBE. |
-
1939
- 1939-02-01 US US254045A patent/US2192491A/en not_active Expired - Lifetime
-
1940
- 1940-02-01 GB GB1957/40A patent/GB538479A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2192491A (en) | 1940-03-05 |
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