GB376727A - Improvements in or connected with electrodes and other metal elements for vacuum electric devices - Google Patents
Improvements in or connected with electrodes and other metal elements for vacuum electric devicesInfo
- Publication number
- GB376727A GB376727A GB3913030A GB3913030A GB376727A GB 376727 A GB376727 A GB 376727A GB 3913030 A GB3913030 A GB 3913030A GB 3913030 A GB3913030 A GB 3913030A GB 376727 A GB376727 A GB 376727A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- nickel
- added
- metals
- metal elements
- 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
- Resistance Heating (AREA)
Abstract
Metal elements of vacuum electric devices such as incandescent lamps and thermionic valves are formed of an alloy containing at least 90 per cent of nickel and at least 0,5 per cent of silicon. The nickel may be replaced wholly or partly by cobalt. Other metals including titanium, vanadium, and zirconium may be added, the silicon forming not more than 6-7 per cent of the alloy and at least 40 per cent of the metals added to the nickel. The alloys withstand high temperatures, are not readily oxidized, are wet by molten glass, are free from occluded gases and withstand the erosive action of electron streams. The ductility and toughness may be improved by the addition of manganese, 5 per cent being sufficient. The thermal and electrical conductivity may be reduced by adding copper, iron, or tungsten. Magnesium may be added to reduce the gas content. Sulphur, carbon, and phosphorus are excluded. Reference has been directed by the Comptroller to Specifications 278,454, 279,890, 295,971, 302,394, 330,401, 334,460, [all in Class 82 (i), Metals, Extracting &c.], and 355,083.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3913030A GB376727A (en) | 1930-12-30 | 1930-12-30 | Improvements in or connected with electrodes and other metal elements for vacuum electric devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3913030A GB376727A (en) | 1930-12-30 | 1930-12-30 | Improvements in or connected with electrodes and other metal elements for vacuum electric devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB376727A true GB376727A (en) | 1932-06-30 |
Family
ID=10407797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3913030A Expired GB376727A (en) | 1930-12-30 | 1930-12-30 | Improvements in or connected with electrodes and other metal elements for vacuum electric devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB376727A (en) |
-
1930
- 1930-12-30 GB GB3913030A patent/GB376727A/en not_active Expired
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