GB527996A - Improvements in or relating to electron multiplier tubes - Google Patents
Improvements in or relating to electron multiplier tubesInfo
- Publication number
- GB527996A GB527996A GB12426/39A GB1242639A GB527996A GB 527996 A GB527996 A GB 527996A GB 12426/39 A GB12426/39 A GB 12426/39A GB 1242639 A GB1242639 A GB 1242639A GB 527996 A GB527996 A GB 527996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- cathode
- axis
- cathode surface
- emitting
- 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
- 239000002184 metal Substances 0.000 abstract 1
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
- H01J43/20—Dynodes consisting of sheet material, e.g. plane, bent
Landscapes
- Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
Abstract
527,996. Electron multipliers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. April 25, 1939, No. 12426. Convention date, May 3, 1938. [Class 39 (i)] The secondary-electron-emitting electrodes are arranged alternately on opposite sides of an axis which is adjacent to the cathode and anode at its opposite ends, the curved cathode surface having an area which is at least twice that of one of the secondary-emitting surfaces and the generatrix of the cathode surface being normal to a plane containing the axis. In the form shown, the photo-electric cathode C is provided with a metal box S which prevents the electrons from being affected by wall charges. Secondary electrodes 1M ... 9M, formed with curved and straight portions, are arranged on opposite sides of the axis A-A and are connected to a potentiometer PR. The first secondary-emitting electrode 1M has an emissive area substantially greater than the succeeding secondary electrodes. An output impedance Z is connected between the anode B and the potentiometer PR and light from a source L is modulated and diffused over the cathode surface by a lens O. The Specification contains numerical data enabling the form of the electrodes to be calculated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US205672A US2198227A (en) | 1938-05-03 | 1938-05-03 | Electron multiplier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB527996A true GB527996A (en) | 1940-10-21 |
Family
ID=22763166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12426/39A Expired GB527996A (en) | 1938-05-03 | 1939-04-25 | Improvements in or relating to electron multiplier tubes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2198227A (en) |
| GB (1) | GB527996A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2553197A (en) * | 1941-06-25 | 1951-05-15 | Hartford Nat Bank & Trust Co | Photoelectric tube |
| NL294533A (en) * | 1962-06-26 |
-
1938
- 1938-05-03 US US205672A patent/US2198227A/en not_active Expired - Lifetime
-
1939
- 1939-04-25 GB GB12426/39A patent/GB527996A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2198227A (en) | 1940-04-23 |
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