GB521942A - Methods and means for rapid heating of electron discharge tube filaments - Google Patents
Methods and means for rapid heating of electron discharge tube filamentsInfo
- Publication number
- GB521942A GB521942A GB25122/38A GB2512238A GB521942A GB 521942 A GB521942 A GB 521942A GB 25122/38 A GB25122/38 A GB 25122/38A GB 2512238 A GB2512238 A GB 2512238A GB 521942 A GB521942 A GB 521942A
- Authority
- GB
- United Kingdom
- Prior art keywords
- condenser
- heating
- voltage
- filament
- methods
- 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
- H01J1/135—Circuit arrangements therefor, e.g. for temperature control
Landscapes
- Control Of Resistance Heating (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
521,942. Thermionic valve circuits. THORNTON, A. A. (Philco Radio & Television Corporation). Aug. 26, 1938, No. 25122. [Class 40 (v)] The cathode or filament of a valve is rendered electron emitting in reduced time by initially applying an excess voltage or by the discharge of a condenser. Fig. 1 shows an arrangement in which the high tension voltage B is momentarily applied while switch arm S engages contact 1 before the application of the normal voltage A. The filament may be entirely energized from the high voltage source by repeated short applications of high voltage, Fig. 2 (not shown). Fig. 4 shows an arrangement in which heating is effected by the successive discharging of condenser C which is charged through a resistance R. In a modification, Fig. 3 (not shown), closure of the switch discharges the condenser and heating is maintained by the battery and resistance in series. Alternatively the initial heating may be by condenser discharge and the heating be maintained from a low voltage source, Fig. 5 (not shown).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25122/38A GB521942A (en) | 1938-08-26 | 1938-08-26 | Methods and means for rapid heating of electron discharge tube filaments |
| US267657A US2275581A (en) | 1938-08-26 | 1939-04-13 | Means for rapid heating of electrondischarge tube filaments |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB25122/38A GB521942A (en) | 1938-08-26 | 1938-08-26 | Methods and means for rapid heating of electron discharge tube filaments |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB521942A true GB521942A (en) | 1940-06-05 |
Family
ID=10222563
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25122/38A Expired GB521942A (en) | 1938-08-26 | 1938-08-26 | Methods and means for rapid heating of electron discharge tube filaments |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2275581A (en) |
| GB (1) | GB521942A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2439816A (en) * | 1942-09-10 | 1948-04-20 | Raytheon Mfg Co | Method of operating electrical space discharge devices |
| US2487455A (en) * | 1945-01-29 | 1949-11-08 | Stromberg Carlson Co | Telephone circuit |
| US4894586A (en) * | 1988-02-18 | 1990-01-16 | Litton Systems, Inc. | Crossed-field amplifier bias circuit and method for improved starting |
| CN100518235C (en) * | 2004-05-28 | 2009-07-22 | Tcl王牌电子(深圳)有限公司 | Method and apparatus for quick display of television |
-
1938
- 1938-08-26 GB GB25122/38A patent/GB521942A/en not_active Expired
-
1939
- 1939-04-13 US US267657A patent/US2275581A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US2275581A (en) | 1942-03-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2146025A (en) | Coating by cathode disintegration | |
| US2199278A (en) | Electron discharge device | |
| US2578571A (en) | Electron discharge device | |
| GB521942A (en) | Methods and means for rapid heating of electron discharge tube filaments | |
| US2403745A (en) | Apparatus and method for making tubes | |
| US2191903A (en) | Electron discharge device | |
| US2180815A (en) | Gas discharge tube and circuit | |
| US2228276A (en) | Electrical gaseous discharge device | |
| GB539661A (en) | Improvements in or relating to thermionic discharge devices | |
| US2381012A (en) | Secondary electron discharge device | |
| US2130191A (en) | Electron discharge device and circuit | |
| US1745369A (en) | Unipotential-cathode vacuum tube | |
| US2164538A (en) | Gas discharge tube and circuits | |
| US2328989A (en) | Gaseous electric discharge device | |
| US3274515A (en) | Pulser for modulated anode tubes | |
| US2311705A (en) | High voltage high current x-ray tube | |
| US2650319A (en) | Grid-controlled ignitor for ignitrons | |
| GB403876A (en) | Improvements relating to electron discharge tubes for purposes of sound recording or the like | |
| US1750058A (en) | Discharge tube containing auxiliary electrodes | |
| US2031101A (en) | Arrangement adapted to generate ultra short electromagnetic waves | |
| US1938636A (en) | Alternating current heated thermionic device | |
| US1962061A (en) | Electrical space discharge device | |
| US1665508A (en) | Electron-discharge device and circuit therefor | |
| GB385191A (en) | Improvements in or relating to electric discharge devices | |
| GB522808A (en) | Improvements in thermionic time delay circuits |