NL94233C - - Google Patents
Info
- Publication number
- NL94233C NL94233C NL94233DA NL94233C NL 94233 C NL94233 C NL 94233C NL 94233D A NL94233D A NL 94233DA NL 94233 C NL94233 C NL 94233C
- Authority
- NL
- Netherlands
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
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/28—Dispenser-type cathodes, e.g. L-cathode
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US473386A US2813220A (en) | 1954-12-06 | 1954-12-06 | Indirectly heated cathode |
Publications (1)
Publication Number | Publication Date |
---|---|
NL94233C true NL94233C (en) |
Family
ID=23879314
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NL94233D NL94233C (en) | 1954-12-06 |
Country Status (8)
Country | Link |
---|---|
US (1) | US2813220A (en) |
BE (1) | BE543391A (en) |
CH (1) | CH336905A (en) |
DE (1) | DE1039141B (en) |
ES (1) | ES225387A1 (en) |
FR (1) | FR1143215A (en) |
GB (1) | GB793726A (en) |
NL (1) | NL94233C (en) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE544065A (en) * | 1953-08-14 | |||
US3201639A (en) * | 1955-02-09 | 1965-08-17 | Philips Corp | Thermionic dispenser cathode |
US2945295A (en) * | 1957-12-20 | 1960-07-19 | Westinghouse Electric Corp | High temperature metallic joint |
US3018404A (en) * | 1958-03-27 | 1962-01-23 | Raytheon Co | Electron tube cathodes |
US2975320A (en) * | 1958-12-03 | 1961-03-14 | Rca Corp | Low-temperature plasma source |
US2945150A (en) * | 1958-12-11 | 1960-07-12 | Gen Electric | Thermionic cathodes and methods of making |
US2975322A (en) * | 1958-12-29 | 1961-03-14 | Raytheon Co | Indirectly heated cathodes |
US3117249A (en) * | 1960-02-16 | 1964-01-07 | Sperry Rand Corp | Embedded heater cathode |
US3134924A (en) * | 1960-07-05 | 1964-05-26 | Monsanto Co | Emissive materials of a metal matrix with molecularly dispersed additives |
US3258636A (en) * | 1961-09-01 | 1966-06-28 | Electron emitter with activator of sill cide, boride or carbide of solid solu- tion of barium and at least one other alkaline earth metal | |
US3373307A (en) * | 1963-11-21 | 1968-03-12 | Philips Corp | Dispenser cathode |
DE2842079A1 (en) * | 1978-09-27 | 1980-04-03 | Siemens Ag | SUPPLY CATHODE, ESPECIALLY METAL CAPILLARY CATHODE |
JPS5652835A (en) * | 1979-10-01 | 1981-05-12 | Hitachi Ltd | Impregnated cathode |
FR2494035A1 (en) * | 1980-11-07 | 1982-05-14 | Thomson Csf | THERMO-ELECTRONIC CATHODE FOR MICROFREQUENCY TUBE AND TUBE INCORPORATING SUCH A CATHODE |
KR930007461B1 (en) * | 1991-04-23 | 1993-08-11 | 주식회사 금성사 | Method of making a dispenser type cathode |
FR2683090A1 (en) * | 1991-10-25 | 1993-04-30 | Europ Composants Electron | Dispenser cathode and method of manufacture of such a cathode |
KR930014673A (en) * | 1991-12-20 | 1993-07-23 | 김정배 | Impregnated Cathode Structure and Manufacturing Method Thereof |
DE10254697A1 (en) * | 2002-11-23 | 2004-06-03 | Philips Intellectual Property & Standards Gmbh | Vacuum electron tube with oxide cathode |
CN114340124B (en) * | 2021-12-30 | 2024-02-27 | 中国科学院合肥物质科学研究院 | Sodium ion emitter and preparation method thereof |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT174993B (en) * | 1951-02-08 | 1953-05-26 | Philips Nv | An electric discharge tube having a cathode consisting of a porous body of refractory metal and a method for producing such a cathode |
AT176924B (en) * | 1951-03-22 | 1953-12-10 | Philips Nv | A method for producing a cathode for an electrical discharge tube which contains a supply of alkaline earth metal compounds inside and the wall of which consists at least partially of a porous body produced by pressing and sintering, and a cathode produced by this method |
DE890390C (en) * | 1951-07-12 | 1953-09-17 | Siemens Ag | Cathode for electrical discharge vessels |
BE515835A (en) * | 1951-11-29 | |||
BE515834A (en) * | 1951-11-29 | |||
BE515833A (en) * | 1951-11-29 | |||
AT180338B (en) * | 1952-02-27 | 1954-11-25 | Philips Nv | Cathode for an electric discharge tube and method for producing this cathode |
AT183488B (en) * | 1953-06-11 | 1955-10-10 | Philips Nv | Method of manufacturing a cathode body for an electric discharge tube |
-
0
- BE BE543391D patent/BE543391A/xx unknown
- NL NL94233D patent/NL94233C/xx active
-
1954
- 1954-12-06 US US473386A patent/US2813220A/en not_active Expired - Lifetime
-
1955
- 1955-12-02 DE DEN11529A patent/DE1039141B/en active Pending
- 1955-12-02 GB GB34563/55A patent/GB793726A/en not_active Expired
- 1955-12-03 ES ES0225387A patent/ES225387A1/en not_active Expired
- 1955-12-05 CH CH336905D patent/CH336905A/en unknown
- 1955-12-05 FR FR1143215D patent/FR1143215A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US2813220A (en) | 1957-11-12 |
GB793726A (en) | 1958-04-23 |
BE543391A (en) | |
DE1039141B (en) | 1958-09-18 |
FR1143215A (en) | 1957-09-27 |
CH336905A (en) | 1959-03-15 |
ES225387A1 (en) | 1956-02-01 |