GB656522A - Improvements in or relating to the manufacture of electric discharge tubes - Google Patents
Improvements in or relating to the manufacture of electric discharge tubesInfo
- Publication number
- GB656522A GB656522A GB23671/47A GB2367147A GB656522A GB 656522 A GB656522 A GB 656522A GB 23671/47 A GB23671/47 A GB 23671/47A GB 2367147 A GB2367147 A GB 2367147A GB 656522 A GB656522 A GB 656522A
- Authority
- GB
- United Kingdom
- Prior art keywords
- barium
- alloy
- copper
- per cent
- electric discharge
- 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)
- Solid Thermionic Cathode (AREA)
Abstract
Oxide cathodes for electric discharge tubes are made from an alloy of copper with barium and/or strontium formed as a dendritic mass whose interstices are filled with the eutectic alloy or alloys. A preferred alloy is pure copper with a few per cent of a mixture comprising 5 parts of barium and 1 part of strontium. In an example described, an alloy of copper and 1.6 per cent barium-obtained by adding 3 per cent barium to molten copper kept under argon, thoroughly stirring the aggregate and then subjecting it to chiled casting-is turned so as to form a tube 2 m.m. in diameter and 60 microns in wall thickness. The dendritic formation is not disturbed. The cathode is then formed by oxidation and activation.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL270673X | 1946-08-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB656522A true GB656522A (en) | 1951-08-22 |
Family
ID=19781917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23671/47A Expired GB656522A (en) | 1946-08-30 | 1947-08-27 | Improvements in or relating to the manufacture of electric discharge tubes |
Country Status (5)
| Country | Link |
|---|---|
| BE (1) | BE475719A (en) |
| CH (1) | CH270673A (en) |
| FR (1) | FR952558A (en) |
| GB (1) | GB656522A (en) |
| NL (1) | NL74345C (en) |
-
0
- NL NL74345D patent/NL74345C/xx active
- BE BE475719D patent/BE475719A/xx unknown
-
1947
- 1947-08-27 GB GB23671/47A patent/GB656522A/en not_active Expired
- 1947-08-28 FR FR952558D patent/FR952558A/en not_active Expired
- 1947-08-28 CH CH270673D patent/CH270673A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR952558A (en) | 1949-11-21 |
| BE475719A (en) | |
| CH270673A (en) | 1950-09-15 |
| NL74345C (en) |
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