GB699977A - Improvements in or relating to thermionic cathodes - Google Patents
Improvements in or relating to thermionic cathodesInfo
- Publication number
- GB699977A GB699977A GB10393/51A GB1039351A GB699977A GB 699977 A GB699977 A GB 699977A GB 10393/51 A GB10393/51 A GB 10393/51A GB 1039351 A GB1039351 A GB 1039351A GB 699977 A GB699977 A GB 699977A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nickel
- coating
- reduced
- tungsten
- filament
- 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)
- Catalysts (AREA)
Abstract
699,977. Cathode materials and processing. MULLARD RADIO VALVE CO., Ltd. Feb. 15, 1952 [May 3, 1951], No. 10393/51. Class 39(i) The cathode core or filament is coated with a mixture of one or more carbonates of alkaline earth metal and a compound of one or more of nickel, cobalt, tungsten, molybdenum, platinum, iridium, osmium, rhodium, and ruthenium which is reduced by heat, with or without a reducing agent, to produce metal which is 10-90 per cent of the coating, the alkaline oxide being produced by the further step of heating the coating. The coating may be applied to a nickel sleeve or a tungsten or nickel filament by dipping, spraying or electrophoresis, and the metal compound may be reduced at the same time as the carbonate is reduced to oxide. Specified proportions of barium and strontium carbonate and nickel formate may be ballmilled in butylacetate and a binder consisting of nitrocellulose, diethyl oxalate, amyl acetate and ethyl alcohol to form a dip or spray paste.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE511131D BE511131A (en) | 1951-05-03 | ||
NL89643D NL89643C (en) | 1951-05-03 | ||
GB10393/51A GB699977A (en) | 1951-05-03 | 1951-05-03 | Improvements in or relating to thermionic cathodes |
DEN5441A DE911876C (en) | 1951-05-03 | 1952-04-29 | Process for the production of cathodes of electrical discharge tubes and electrical discharge tubes with a cathode produced according to this process |
CH307771D CH307771A (en) | 1951-05-03 | 1952-05-01 | Process for producing a cathode for electric discharge tubes and cathode produced by this process. |
US285562A US2748033A (en) | 1951-05-03 | 1952-05-01 | Method of making gas discharge tube and rectifier |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB10393/51A GB699977A (en) | 1951-05-03 | 1951-05-03 | Improvements in or relating to thermionic cathodes |
Publications (1)
Publication Number | Publication Date |
---|---|
GB699977A true GB699977A (en) | 1953-11-18 |
Family
ID=9967000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB10393/51A Expired GB699977A (en) | 1951-05-03 | 1951-05-03 | Improvements in or relating to thermionic cathodes |
Country Status (6)
Country | Link |
---|---|
US (1) | US2748033A (en) |
BE (1) | BE511131A (en) |
CH (1) | CH307771A (en) |
DE (1) | DE911876C (en) |
GB (1) | GB699977A (en) |
NL (1) | NL89643C (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3755205A (en) * | 1972-03-28 | 1973-08-28 | Us Army | Method of making a catalytic bed |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1894059A (en) * | 1927-04-08 | 1933-01-10 | Forest Radio Company De | Process for producing electron emitters and the product |
US2049372A (en) * | 1934-11-19 | 1936-07-28 | Gen Electric | Emissive coating for cathodes and method for preparing the same |
US2430520A (en) * | 1945-03-06 | 1947-11-11 | Glass Science Inc | Deposition of metal on glass from metal formates |
-
0
- BE BE511131D patent/BE511131A/xx unknown
- NL NL89643D patent/NL89643C/xx active
-
1951
- 1951-05-03 GB GB10393/51A patent/GB699977A/en not_active Expired
-
1952
- 1952-04-29 DE DEN5441A patent/DE911876C/en not_active Expired
- 1952-05-01 US US285562A patent/US2748033A/en not_active Expired - Lifetime
- 1952-05-01 CH CH307771D patent/CH307771A/en unknown
Also Published As
Publication number | Publication date |
---|---|
BE511131A (en) | |
CH307771A (en) | 1955-06-15 |
NL89643C (en) | |
US2748033A (en) | 1956-05-29 |
DE911876C (en) | 1954-05-20 |
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