GB675163A - Improvements in or relating to vacuum electric discharge tubes - Google Patents
Improvements in or relating to vacuum electric discharge tubesInfo
- Publication number
- GB675163A GB675163A GB12237/47A GB1223747A GB675163A GB 675163 A GB675163 A GB 675163A GB 12237/47 A GB12237/47 A GB 12237/47A GB 1223747 A GB1223747 A GB 1223747A GB 675163 A GB675163 A GB 675163A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrode
- relating
- emitting
- mixture
- electric discharge
- 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
- H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2893/00—Discharge tubes and lamps
- H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
- H01J2893/0012—Constructional arrangements
- H01J2893/0019—Chemical composition and manufacture
- H01J2893/0022—Manufacture
- H01J2893/0023—Manufacture carbonising and other surface treatments
Landscapes
- Discharge Lamp (AREA)
Abstract
675,163. Electrode materials. PHILIPS LAMPS, Ltd. May 6. 1947 [Dec. 14, 1944], No. 12237/47. Class 39 (i). To maintain constant the operation of an electrode emitting secondary electrons, such as the grid of a transmitting valve designed to emit secondary electrons in a one-to-one ratio and so to receive a net current of zero, the electrode has a coating of a mixture of secondary emitting material such as one or both of the oxides of magnesium and beryllium, and a material of good heat-radiating properties such as carbon or black oxides of titanium, molybdenum, zirconium, or tungsten. The heatradiating material ensures the maintenance of the electrode at a low temperature. A mixture of soot and magnesia may be applied to the electrode by means of a suspension. Part of the electrode may be left uncoated, or may be coated only with secondary-emitting material, or only with heat-radiating material.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE675163X | 1944-12-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB675163A true GB675163A (en) | 1952-07-09 |
Family
ID=3877570
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB12237/47A Expired GB675163A (en) | 1944-12-14 | 1947-05-06 | Improvements in or relating to vacuum electric discharge tubes |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB675163A (en) |
-
1947
- 1947-05-06 GB GB12237/47A patent/GB675163A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB675163A (en) | Improvements in or relating to vacuum electric discharge tubes | |
GB730920A (en) | Improvements in or relating to high-vacuum electric discharge tubes of the kind comprising cold electrodes | |
GB730862A (en) | Improvements in or relating to vacuum discharge tubes | |
GB670554A (en) | Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein | |
GB617248A (en) | Electron discharge devices of the magnetron type | |
GB723987A (en) | Improvements in or relating to electron discharge devices | |
US2747125A (en) | Voltage regulator tube | |
GB614457A (en) | Improvements in or relating to electric discharge tubes comprising one or more secondary emission electrodes | |
US2467840A (en) | Direct-current transformer | |
GB670607A (en) | Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein | |
GB639584A (en) | Improvements in and relating to electrode mount assemblies for electric gaseous discharge devices | |
GB609557A (en) | Improvements in or relating to electron discharge devices | |
GB671992A (en) | Improvements in or relating to electric discharge tubes | |
GB675037A (en) | Improvements in or relating to cathode ray tubes | |
GB639659A (en) | Improvements in the amplification of low voltages by means of an electric discharge tube | |
GB648046A (en) | Improvements in or relating to electric discharge tubes comprising disc-like electrodes | |
GB712886A (en) | Improvements in or relating to electric discharge tubes | |
GB605853A (en) | Improvements in or relating to electric discharge tubes | |
GB602228A (en) | Improvements in or relating to devices comprising electric discharge tubes | |
GB230492A (en) | Improvements in and relating to electric discharge vessels, tubes or the like | |
GB792551A (en) | Improvements in or relating to electric discharge tubes | |
GB542104A (en) | Improvements in electric discharge devices of the cathode ray type | |
GB625283A (en) | Improvements in rectifying electric discharge tubes | |
GB683611A (en) | Improvements in or relating to electric discharge tubes and circuit arrangements therefor | |
GB710462A (en) | Improvements in or relating to electric discharge tubes for use at very high radio frequencies |