GB537658A - Improvements in thermionic device - Google Patents
Improvements in thermionic deviceInfo
- Publication number
- GB537658A GB537658A GB32927/39A GB3292739A GB537658A GB 537658 A GB537658 A GB 537658A GB 32927/39 A GB32927/39 A GB 32927/39A GB 3292739 A GB3292739 A GB 3292739A GB 537658 A GB537658 A GB 537658A
- Authority
- GB
- United Kingdom
- Prior art keywords
- iron
- per cent
- molybdenum
- cobalt
- nickel
- 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
-
- 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
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
Abstract
537,658. Alloys. KEMET LABORATORIES CO., Inc. Dec. 28, 1939, No. 32927. Convention date, Feb. 17. Drawings to Specification. [Class 82 (i)] One or more elements of a thermionic tube are made of an alloy consisting of nickel with 15-40 per cent. of molybdenum and less than 10 per cent. of iron. The nickel may be wholly or partly replaced by cobalt or by cobalt and iron, or partly by iron, but if iron is present its amount is less than 10 per cent. and preferably not more than 5 per cent. The molybdenum may be partly replaced by tungsten. Small amounts of vanadium, carbon, manganese, silicon, zirconium, and magnesium may be present. Specification 410,268 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US537658XA | 1939-02-17 | 1939-02-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB537658A true GB537658A (en) | 1941-07-01 |
Family
ID=21986383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB32927/39A Expired GB537658A (en) | 1939-02-17 | 1939-12-28 | Improvements in thermionic device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB537658A (en) |
-
1939
- 1939-12-28 GB GB32927/39A patent/GB537658A/en not_active Expired
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