GB499649A - Improvements in or relating to electron multipliers - Google Patents
Improvements in or relating to electron multipliersInfo
- Publication number
- GB499649A GB499649A GB20323/??A GB2032337A GB499649A GB 499649 A GB499649 A GB 499649A GB 2032337 A GB2032337 A GB 2032337A GB 499649 A GB499649 A GB 499649A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electrodes
- grid
- electrode
- cathode
- electron multipliers
- 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
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000002452 interceptive effect Effects 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
- H01J43/08—Cathode arrangements
Landscapes
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
499,649. Electron multipliers. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. July 22, 1937, No. 20323. Convention date, July 22, 1936. [Class 39 (i)] In electron multipliers having an end collector electrode 21, secondary emitting surfaces 5, withdrawing electrodes 9 and a magnetic field parallel to the surfaces 5 the electrodes being biassed positively to the thermionic cathode 29, the latter is surrounded by a magnetic shield 33, which prevents the magnetic field acting on the emission from the cathode and interfering with control by the grid 41. A positively-biassed screen grid 85 between the control grid and the multiplier electrodes prevents effects from changes in bias on these electrodes reacting on the thermionic emission. The control grid 41 or the screen grid 85 may be supported by the shield 33 or independently. The cathode comprises a thimble with emissive coating 31 and heater 27. The biassing potentials are such that each electrode 9 is positive to that secondary emitting electrode which is below it; it may have the same potential as that under the adjacent electrode 9. Specification 469,477 is referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US91807A US2219871A (en) | 1936-07-22 | 1936-07-22 | Electric discharge device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB499649A true GB499649A (en) | 1939-01-23 |
Family
ID=22229743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB20323/??A Expired GB499649A (en) | 1936-07-22 | 1937-07-22 | Improvements in or relating to electron multipliers |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2219871A (en) |
| BE (1) | BE422740A (en) |
| GB (1) | GB499649A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR959708A (en) * | 1941-07-28 | 1950-04-04 |
-
0
- BE BE422740D patent/BE422740A/xx unknown
-
1936
- 1936-07-22 US US91807A patent/US2219871A/en not_active Expired - Lifetime
-
1937
- 1937-07-22 GB GB20323/??A patent/GB499649A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2219871A (en) | 1940-10-29 |
| BE422740A (en) |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB495843A (en) | Electron multipliers | |
| GB556046A (en) | Improvements relating to electron guns such as are used in cathode ray tubes | |
| GB499649A (en) | Improvements in or relating to electron multipliers | |
| GB629881A (en) | Improvements in electric discharge tubes comprising secondary emission electrodes | |
| GB498843A (en) | Improvements in or relating to electron multiplier discharge devices | |
| GB520117A (en) | Improvements in or relating to electron multipliers | |
| GB514297A (en) | Improvements in or relating to electron multipliers and circuits therefor | |
| GB470026A (en) | Improvements in or relating to electron discharge devices | |
| GB471672A (en) | Improvements in or relating to electron discharge devices | |
| GB519111A (en) | Improvements in and relating to cathode ray tubes | |
| GB675868A (en) | Improvements relating to television or like pick-up tubes | |
| GB490761A (en) | Improvements in or relating to electron multiplying devices | |
| GB469283A (en) | Improvements in or relating to secondary emission electron multipliers | |
| GB498566A (en) | Improvements in electron multipliers | |
| GB490265A (en) | Improvements in valve amplifiers comprising a secondary emission electron multiplier | |
| GB493907A (en) | Improvements in or relating to thermionic valves | |
| GB493614A (en) | Improvements in or relating to thermionic valves | |
| GB518553A (en) | Improvements in electron multipliers | |
| GB471501A (en) | Improvements in and relating to electron discharge devices | |
| GB474084A (en) | Improvements in or relating to electron discharge devices | |
| GB851626A (en) | Improvements in or relating to low noise electron guns | |
| GB500361A (en) | Improvements in or relating to thermionic valves | |
| GB483575A (en) | Improvements in or relating to electron discharge device arrangements | |
| GB525758A (en) | Improvements in electron multiplier arrangements | |
| GB499971A (en) | Improvements in or relating to thermionic valves |