GB483826A - Improvements in or relating to electron discharge devices - Google Patents
Improvements in or relating to electron discharge devicesInfo
- Publication number
- GB483826A GB483826A GB29037/36A GB2903736A GB483826A GB 483826 A GB483826 A GB 483826A GB 29037/36 A GB29037/36 A GB 29037/36A GB 2903736 A GB2903736 A GB 2903736A GB 483826 A GB483826 A GB 483826A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electron
- cathode
- diameter
- length
- electrode
- 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
- H01J43/04—Electron multipliers
- H01J43/06—Electrode arrangements
- H01J43/18—Electrode arrangements using essentially more than one dynode
- H01J43/26—Box dynodes
Landscapes
- Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
- Electron Sources, Ion Sources (AREA)
Abstract
483,826. Discharge apparatus. MARCONI'S WIRELESS'TELEGRAPH CO., Ltd. Oct. 26, 1936, No. 29037. Convention date, Oct. 25, 1935. [Class 39 (i)] An electron lens, which is adapted to reproduce with unity magnification the electron-emitting surface of one electrode 1, Fig. 1, onto another electrode 3, comprises two members 2, 4 of the same diameter, the length of the member 2 being less than, e.g. two-thirds of, the diameter and the length of the member 4 being greater than, e.g. twice or four thirds, the diameter, and the longer member 4 being at a positive potential with respect to the member 2. The distance s should not be greater than three per cent of the total length. An electron multiplier comprises a photo-sensitive cathode 16, Fig. 2, target electrodes 18, 20 and an anode 22. Electron lenses are formed by members 16a, 18b ; 18a, 20b. The cathode 16 and the target 20 are provided with further cylinders 16b, 20a respectively. The electrodes are arranged at 45 with respect to the axis of the cylinders. The electrode potentials may be obtained from a potentiometer and a thermionic cathode may be used. Specifications 443,777, 453,270, and 469,488, are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US46644A US2174162A (en) | 1935-10-25 | 1935-10-25 | Electron multiplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB483826A true GB483826A (en) | 1938-04-26 |
Family
ID=21944583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29037/36A Expired GB483826A (en) | 1935-10-25 | 1936-10-26 | Improvements in or relating to electron discharge devices |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2174162A (en) |
| GB (1) | GB483826A (en) |
-
1935
- 1935-10-25 US US46644A patent/US2174162A/en not_active Expired - Lifetime
-
1936
- 1936-10-26 GB GB29037/36A patent/GB483826A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2174162A (en) | 1939-09-26 |
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