BE428729A - - Google Patents
Info
- Publication number
- BE428729A BE428729A BE428729DA BE428729A BE 428729 A BE428729 A BE 428729A BE 428729D A BE428729D A BE 428729DA BE 428729 A BE428729 A BE 428729A
- Authority
- BE
- Belgium
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
- H01J43/22—Dynodes consisting of electron-permeable material, e.g. foil, grid, tube, venetian blind
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
- H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
- H01J29/023—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof secondary-electron emitting electrode arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J43/00—Secondary-emission tubes; Electron-multiplier tubes
- H01J43/04—Electron multipliers
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE428729X | 1937-06-26 | ||
| DEF4676D DE930698C (en) | 1937-06-26 | 1938-01-30 | Secondary amplifier with impact grilles |
| GB20162/38A GB516785A (en) | 1937-06-26 | 1938-07-07 | Improvements in or relating to electron multipliers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE428729A true BE428729A (en) | 1938-07-30 |
Family
ID=41682616
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE428729D BE428729A (en) | 1937-06-26 | 1938-06-21 | |
| BE432129D BE432129A (en) | 1937-06-26 | 1939-01-13 |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE432129D BE432129A (en) | 1937-06-26 | 1939-01-13 |
Country Status (7)
| Country | Link |
|---|---|
| US (2) | US2221447A (en) |
| BE (2) | BE428729A (en) |
| CH (1) | CH208634A (en) |
| DE (1) | DE930698C (en) |
| FR (1) | FR839826A (en) |
| GB (1) | GB516785A (en) |
| NL (1) | NL52081C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2442848A (en) * | 1942-03-09 | 1948-06-08 | Farnsworth Res Corp | Electron control tube |
| US4878867A (en) * | 1988-07-29 | 1989-11-07 | Ralphco Inc. | Coin bank |
-
1938
- 1938-01-30 DE DEF4676D patent/DE930698C/en not_active Expired
- 1938-06-17 US US214179A patent/US2221447A/en not_active Expired - Lifetime
- 1938-06-21 BE BE428729D patent/BE428729A/xx unknown
- 1938-06-23 NL NL88509A patent/NL52081C/xx active
- 1938-06-25 FR FR839826D patent/FR839826A/en not_active Expired
- 1938-07-07 GB GB20162/38A patent/GB516785A/en not_active Expired
-
1939
- 1939-01-13 BE BE432129D patent/BE432129A/fr unknown
- 1939-01-27 CH CH208634D patent/CH208634A/en unknown
- 1939-02-04 US US254561A patent/US2245895A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| BE432129A (en) | 1939-02-28 |
| CH208634A (en) | 1940-02-15 |
| US2221447A (en) | 1940-11-12 |
| DE930698C (en) | 1955-07-21 |
| NL52081C (en) | 1942-03-16 |
| GB516785A (en) | 1940-01-11 |
| US2245895A (en) | 1941-06-17 |
| FR839826A (en) | 1939-04-13 |