GB646303A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB646303A GB646303A GB1676/48A GB167648A GB646303A GB 646303 A GB646303 A GB 646303A GB 1676/48 A GB1676/48 A GB 1676/48A GB 167648 A GB167648 A GB 167648A GB 646303 A GB646303 A GB 646303A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- electrode
- focusing electrode
- electron
- operated
- 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
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/02—Tubes in which one or a few electrodes are secondary-electron emitting electrodes
Landscapes
- Microwave Tubes (AREA)
- Solid Thermionic Cathode (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
646,303. Thermionic valves; electron multipliers. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Oct. 24, 1945, No. 1676/48. Divided out of 601,966. [Class 39 (i)] An electron discharge device comprises a cathode 5, control electrode 6, screening or accelerating electrode 7, and electron collecting electrode 10, all these electrodes being surrounded by a substantially circular focusing electrode 13, no central focusing electrode being provided, and the device is operated so that electrons emitted from opposite sides of the cathode as divergent streams are caused to follow curved paths and to converge upon the collector 10. The focusing electrode is operated at a few volts positive with respect to the cathode. In a modified construction the cathode is emissive on only one side and the focusing electrode 13 is semicircular. Other constructional features are as described in connection with the Specification 601,966. Specifications 500,090 and 559,150 also are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB20673/44A GB601966A (en) | 1945-10-24 | 1945-10-24 | Improvements in or relating to electron discharge devices |
Publications (1)
Publication Number | Publication Date |
---|---|
GB646303A true GB646303A (en) | 1950-11-22 |
Family
ID=32188948
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1676/48A Expired GB646303A (en) | 1945-10-24 | 1945-10-24 | Improvements in or relating to electron discharge devices |
GB20673/44A Expired GB601966A (en) | 1945-10-24 | 1945-10-24 | Improvements in or relating to electron discharge devices |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB20673/44A Expired GB601966A (en) | 1945-10-24 | 1945-10-24 | Improvements in or relating to electron discharge devices |
Country Status (6)
Country | Link |
---|---|
US (1) | US2602905A (en) |
CH (1) | CH271504A (en) |
DE (1) | DE818820C (en) |
FR (1) | FR958107A (en) |
GB (2) | GB646303A (en) |
NL (1) | NL72121C (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE970327C (en) * | 1936-03-07 | 1958-09-11 | Pintsch Bamag Ag | Device for bundling ultra-short electromagnetic waves |
BE426512A (en) * | 1937-02-23 | |||
BE427228A (en) * | 1937-03-30 | |||
BE428074A (en) * | 1937-05-14 | |||
US2390701A (en) * | 1943-01-27 | 1945-12-11 | Rca Corp | Secondary electron emitter |
-
0
- FR FR958107D patent/FR958107A/fr not_active Expired
- NL NL72121D patent/NL72121C/xx active
-
1945
- 1945-10-24 GB GB1676/48A patent/GB646303A/en not_active Expired
- 1945-10-24 GB GB20673/44A patent/GB601966A/en not_active Expired
-
1946
- 1946-09-07 US US695531A patent/US2602905A/en not_active Expired - Lifetime
-
1947
- 1947-12-29 CH CH271504D patent/CH271504A/en unknown
-
1949
- 1949-03-01 DE DEP35318D patent/DE818820C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR958107A (en) | 1950-03-03 |
US2602905A (en) | 1952-07-08 |
DE818820C (en) | 1951-10-29 |
CH271504A (en) | 1950-10-31 |
GB601966A (en) | 1948-05-18 |
NL72121C (en) |
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