GB670561A - Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein - Google Patents
Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use thereinInfo
- Publication number
- GB670561A GB670561A GB3180946A GB3180946A GB670561A GB 670561 A GB670561 A GB 670561A GB 3180946 A GB3180946 A GB 3180946A GB 3180946 A GB3180946 A GB 3180946A GB 670561 A GB670561 A GB 670561A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electron
- oxide
- relating
- electrodes
- discharge devices
- 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
- H01J1/32—Secondary-electron-emitting electrodes
Landscapes
- Discharge Lamp (AREA)
Abstract
670,561. Electrode materials. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Oct. 26, 1946 [Nov. 7, 1945], No. 31809/46. Divided out of 670,554. Class 39 (i). A secondary electron-emitting electrode has a coating at least 10<SP>-4</SP> inches thick comprising a refractory oxide, e.g. magnesium oxide, aluminium oxide, or beryllium oxide, in which is dispersed a metal which is removed by electron bombardment at least as readily as the oxide, e.g. gold, silver or copper. The description is substantially identical with that of Specification 670,607. Specifications 601,966 and 670,554 also are referred to.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1610350A GB670607A (en) | 1945-11-07 | 1945-11-07 | Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein |
GB3180946A GB670561A (en) | 1945-11-07 | 1945-11-07 | Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3180946A GB670561A (en) | 1945-11-07 | 1945-11-07 | Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein |
Publications (1)
Publication Number | Publication Date |
---|---|
GB670561A true GB670561A (en) | 1952-04-23 |
Family
ID=10328741
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3180946A Expired GB670561A (en) | 1945-11-07 | 1945-11-07 | Improvements in or relating to electron discharge devices employing secondary-electron emission and electrodes for use therein |
GB1610350A Expired GB670607A (en) | 1945-11-07 | 1945-11-07 | Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1610350A Expired GB670607A (en) | 1945-11-07 | 1945-11-07 | Improvements in or relating to electron discharge devices employing secondary electron emission and electrodes for use therein |
Country Status (1)
Country | Link |
---|---|
GB (2) | GB670561A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3117713A (en) * | 1957-11-28 | 1964-01-14 | Degussa | Vacuum pump |
BE630375A (en) * | 1962-03-30 | |||
CN113471034B (en) * | 2021-05-29 | 2023-11-14 | 南京三乐集团有限公司 | Preparation method of magnesium oxide secondary emitter |
-
1945
- 1945-11-07 GB GB3180946A patent/GB670561A/en not_active Expired
- 1945-11-07 GB GB1610350A patent/GB670607A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB670607A (en) | 1952-04-23 |
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