BE490180A - - Google Patents
Info
- Publication number
- BE490180A BE490180A BE490180DA BE490180A BE 490180 A BE490180 A BE 490180A BE 490180D A BE490180D A BE 490180DA BE 490180 A BE490180 A BE 490180A
- Authority
- BE
- Belgium
Links
Classifications
-
- 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/54—Arrangements for centring ray or beam
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB507349A GB657234A (en) | 1949-02-24 | 1949-02-24 | Improvements in or relating to the focusing and positioning of the beam of a cathode-ray tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE490180A true BE490180A (en) |
Family
ID=9789253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE490180D BE490180A (en) | 1949-02-24 |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE490180A (en) |
| DE (1) | DE970363C (en) |
| GB (1) | GB657234A (en) |
| NL (1) | NL147885B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL88265C (en) * | 1954-06-03 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE424327A (en) * | 1936-10-30 | |||
| DE973258C (en) * | 1938-03-08 | 1959-12-31 | Siemens Ag | Magnetic pole shoe lens with a small focal length for electron-optical enlargements in electron microscopes |
| GB576369A (en) * | 1943-03-31 | 1946-04-01 | British Thomson Houston Co Ltd | Improvements in and relating to electron discharge devices and lens systems therefor |
-
0
- BE BE490180D patent/BE490180A/xx unknown
- NL NL676713697A patent/NL147885B/en unknown
-
1949
- 1949-02-24 GB GB507349A patent/GB657234A/en not_active Expired
-
1950
- 1950-10-03 DE DEP4280A patent/DE970363C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB657234A (en) | 1951-09-12 |
| NL147885B (en) | |
| DE970363C (en) | 1958-09-11 |