GB1218667A - Electron discharge device heater - Google Patents
Electron discharge device heaterInfo
- Publication number
- GB1218667A GB1218667A GB54690/68A GB5469068A GB1218667A GB 1218667 A GB1218667 A GB 1218667A GB 54690/68 A GB54690/68 A GB 54690/68A GB 5469068 A GB5469068 A GB 5469068A GB 1218667 A GB1218667 A GB 1218667A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- insulating material
- discharge device
- nov
- coatings
- 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
- H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
- H01J1/22—Heaters
Abstract
1,218,667. Thermionic cathode constructions. SYLVANIA ELECTRIC PRODUCTS Inc. 18 Nov., 1968 [16 Nov., 1967], No. 54690/68. Heading H1D. A heater for an indirectly heated cathode comprises a wire core 11, e.g. of tungsten, with a first coating 13 of insulating material, a third coating 17 of insulating material and a second intermediate coating 15 having a higher thermal emissivity than the material of the first and third coatings. The insulating material of coatings 13 and 17 is preferably aluminium oxide but may be the oxide or silicate of beryllium or titanium, and the third coating 17 may be between 0À0005 and 0À0015 inch thick. The material of the second coating 15 may be aluminium oxide mixed with graphite, lampblack or tungsten metal particles.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US68362967A | 1967-11-16 | 1967-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1218667A true GB1218667A (en) | 1971-01-06 |
Family
ID=24744833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB54690/68A Expired GB1218667A (en) | 1967-11-16 | 1968-11-18 | Electron discharge device heater |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3500454A (en) |
| GB (1) | GB1218667A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2317446C3 (en) * | 1973-04-06 | 1983-11-10 | Standard Elektrik Lorenz Ag, 7000 Stuttgart | Method of manufacturing a heating element for an indirectly heated cathode |
| US4082938A (en) * | 1977-05-10 | 1978-04-04 | Igor Vladimirovich Shergov | Thermionic heater cathode assembly of electron-beam gun |
| JPS5816737B2 (en) * | 1978-04-24 | 1983-04-01 | 株式会社日立製作所 | Oxide cathode for electron tubes |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US792001A (en) * | 1903-07-25 | 1905-06-13 | Gen Electric | Film-coated wire. |
| US1618499A (en) * | 1923-11-06 | 1927-02-22 | Charles P White | Electrical apparatus |
| US1954474A (en) * | 1927-05-20 | 1934-04-10 | Espe Werner | Glow cathode |
| US2677782A (en) * | 1950-10-27 | 1954-05-04 | Sylvania Electric Prod | Vacuum tube heater |
| GB734196A (en) * | 1952-06-11 | 1955-07-27 | Standard Telephones Cables Ltd | Improvements in or relating to indirectly heated cathodes |
| DE1090774B (en) * | 1959-03-20 | 1960-10-13 | Siemens Ag | Heating element for indirectly heated cathodes and process for the production of an insulating coating |
| NL268393A (en) * | 1960-08-19 | |||
| NL272248A (en) * | 1960-12-15 | |||
| US3161540A (en) * | 1962-06-20 | 1964-12-15 | Sylvania Electric Prod | Process of manufacturing insulated heater wire and article |
| US3305405A (en) * | 1963-07-17 | 1967-02-21 | Charles P Jamieson | Graphite thermocouples and method of making |
| US3328201A (en) * | 1964-04-27 | 1967-06-27 | Rca Corp | Heater for electron tubes |
-
1967
- 1967-11-16 US US683629A patent/US3500454A/en not_active Expired - Lifetime
-
1968
- 1968-11-18 GB GB54690/68A patent/GB1218667A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US3500454A (en) | 1970-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US1946312A (en) | X-ray tube | |
| GB922440A (en) | Cathode heater for electron discharge devices | |
| GB1137910A (en) | Electron image device | |
| GB1283143A (en) | An electrically heated object and its method of manufacture | |
| GB1218667A (en) | Electron discharge device heater | |
| US2233917A (en) | Black coating for electron discharge devices | |
| GB1141495A (en) | Improvements in or relating to magnetrons | |
| US1932025A (en) | Electrode positive column lamp | |
| GB1017004A (en) | Electron discharge devices | |
| US3633062A (en) | Direct-heated cathode electrodes with cathode shield for electron guns | |
| US2424526A (en) | Electric discharge device | |
| GB1100420A (en) | Improvements in thermionic valves | |
| US1684263A (en) | Hot-cathode device | |
| US1926407A (en) | Filament for heater type vacuum tubes | |
| US1945749A (en) | Vapor electric device | |
| GB908096A (en) | Heater cathode assembly and support therefor | |
| GB1041478A (en) | Electron guns | |
| GB375851A (en) | Improvements in and relating to electric discharge devices | |
| GB1373103A (en) | Electron beam apparatus | |
| GB1177489A (en) | A Method for Manufacturing Black Heaters for Electron Valves. | |
| GB1534169A (en) | Cathode-ray tube with thermally-set getter spring support | |
| US1865449A (en) | Thermionically inactive electrode | |
| US1923335A (en) | Thermionic vapor discharge device | |
| GB1032208A (en) | Improvements in or relating to electron discharge device | |
| GB1006423A (en) | Fast warm-up cathode assembly |