GB430853A - Improvements in or relating to indirectly heated cathodes for electron discharge tubes - Google Patents
Improvements in or relating to indirectly heated cathodes for electron discharge tubesInfo
- Publication number
- GB430853A GB430853A GB12783/34A GB1278334A GB430853A GB 430853 A GB430853 A GB 430853A GB 12783/34 A GB12783/34 A GB 12783/34A GB 1278334 A GB1278334 A GB 1278334A GB 430853 A GB430853 A GB 430853A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coated
- vanadium trioxide
- indirectly heated
- paste
- relating
- 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
- H01J1/26—Supports for the emissive material
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Discharge Lamp (AREA)
Abstract
430,853. Thermionic valves. NAAMLOOZE VENNOOTSCHAP PHILIPS' GLOEILAMPENFABRIEKEN, 29, Emmasingel, Eindhoven, Holland. April 27, 1934, No. 12783. Convention date, July 13, 1933. [Class 39 (i)] In indirectly heated cathodes wherein the cathode body is composed wholly or in part of copper or silver, the inner surface of the body or the surface of the heater or both these surfaces are coated with a material whose thermal emissivity approximates to that of a perfectly black body; or the heater itself is made wholly or in part of such material. The material may be of vanadium trioxide, nickel oxide or carbon. In one construction a rod of magnesium oxide is immersed in a paste of material known under the Registered Trade Mark as " Aquadag " and the rod is then rotated inside a copper body ; after the paste has dried on the body it is coated with vanadium trioxide. A tube of magnesium oxide, aluminium oxide or quartz is then inserted in the body and the filament which may be coated with insulation is placed in the insulating tube. In another construction an insulating tube inside the body is coated with graphite or vanadium trioxide.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL430853X | 1933-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB430853A true GB430853A (en) | 1935-06-26 |
Family
ID=19786148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12783/34A Expired GB430853A (en) | 1933-07-13 | 1934-04-27 | Improvements in or relating to indirectly heated cathodes for electron discharge tubes |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2057124A (en) |
| BE (1) | BE404192A (en) |
| FR (1) | FR775737A (en) |
| GB (1) | GB430853A (en) |
| NL (1) | NL40799C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE855606C (en) * | 1943-01-15 | 1952-11-13 | Philips Nv | Electric discharge tubes and processes for their manufacture |
| US2889445A (en) * | 1955-03-28 | 1959-06-02 | Herman B Wolf | Electrically heated mat |
| US3062507A (en) * | 1957-11-18 | 1962-11-06 | Smith Corp A O | Multi-layer vessel having a heat transfer material disposed between layers |
| US3009044A (en) * | 1960-07-11 | 1961-11-14 | Doehler Hans | Electric resistance element for space heaters |
| GB970426A (en) * | 1961-02-09 | 1964-09-23 | Scholemann Ag | Improvements in electrically heated billet-containers for metal-extrusion or tube presses |
| US3662211A (en) * | 1961-03-15 | 1972-05-09 | Gen Electric | Cathode construction |
| US3958146A (en) * | 1974-02-08 | 1976-05-18 | Gte Sylvania Incorporated | Fast warm up picture tube cathode cap having high heat emissivity surface on the interior thereof |
| US4009409A (en) * | 1975-09-02 | 1977-02-22 | Gte Sylvania Incorporated | Fast warmup cathode and method of making same |
| US5156728A (en) * | 1987-02-12 | 1992-10-20 | Terumo Kabushiki Kaisha | Ion sensor |
-
0
- NL NL40799D patent/NL40799C/xx active
- BE BE404192D patent/BE404192A/xx unknown
-
1934
- 1934-04-27 GB GB12783/34A patent/GB430853A/en not_active Expired
- 1934-05-02 US US723510A patent/US2057124A/en not_active Expired - Lifetime
- 1934-07-11 FR FR775737D patent/FR775737A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| BE404192A (en) | |
| FR775737A (en) | 1935-01-08 |
| NL40799C (en) | |
| US2057124A (en) | 1936-10-13 |
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