FR678211A - Perfectionnements aux matières émettrices d'électrons - Google Patents
Perfectionnements aux matières émettrices d'électronsInfo
- Publication number
- FR678211A FR678211A FR678211DA FR678211A FR 678211 A FR678211 A FR 678211A FR 678211D A FR678211D A FR 678211DA FR 678211 A FR678211 A FR 678211A
- Authority
- FR
- France
- Prior art keywords
- electron
- emitting materials
- emitting
- materials
- 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
-
- 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
- H01J1/142—Solid thermionic cathodes characterised by the material with alkaline-earth metal oxides, or such oxides used in conjunction with reducing agents, as an emissive material
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Solid Thermionic Cathode (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Discharge Lamp (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US292037A US1870951A (en) | 1928-07-11 | 1928-07-11 | Electron emission material |
Publications (1)
Publication Number | Publication Date |
---|---|
FR678211A true FR678211A (fr) | 1930-03-20 |
Family
ID=23122913
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR678211D Expired FR678211A (fr) | 1928-07-11 | 1929-07-09 | Perfectionnements aux matières émettrices d'électrons |
Country Status (3)
Country | Link |
---|---|
US (1) | US1870951A (fr) |
FR (1) | FR678211A (fr) |
GB (1) | GB315324A (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE741396C (de) * | 1937-07-17 | 1943-11-10 | Sueddeutsche Telefon App Kabel | Verfahren zur Herstellung von isolierten gewendelten Heizdraehten fuer indirekt geheizte Kathoden |
US2422469A (en) * | 1945-07-09 | 1947-06-17 | Edward A Coomes | Electron emitting cathode |
US2473600A (en) * | 1945-07-26 | 1949-06-21 | Linde Air Prod Co | Coating work with an electronemissive material to improve inert gas-shielded refractory electrode alternating current arc welding |
US2552654A (en) * | 1948-08-30 | 1951-05-15 | Rca Corp | Heat-resistant cathode coatings |
US2703790A (en) * | 1952-08-28 | 1955-03-08 | Raytheon Mfg Co | Electron emissive materials |
US2828396A (en) * | 1954-10-06 | 1958-03-25 | Forman Ralph | Magnetoresistive device |
US2916652A (en) * | 1955-02-04 | 1959-12-08 | Raytheon Co | Control of electron emission in cathode assemblies |
JPH09147735A (ja) * | 1995-09-21 | 1997-06-06 | Matsushita Electron Corp | 陰極線管用エミッタ材料及びその製造方法 |
US5925976A (en) * | 1996-11-12 | 1999-07-20 | Matsushita Electronics Corporation | Cathode for electron tube having specific emissive material |
-
1928
- 1928-07-11 US US292037A patent/US1870951A/en not_active Expired - Lifetime
-
1929
- 1929-07-09 FR FR678211D patent/FR678211A/fr not_active Expired
- 1929-07-11 GB GB21341/29A patent/GB315324A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US1870951A (en) | 1932-08-09 |
GB315324A (en) | 1930-10-13 |
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