FR853989A - - Google Patents
Info
- Publication number
- FR853989A FR853989A FR853989DA FR853989A FR 853989 A FR853989 A FR 853989A FR 853989D A FR853989D A FR 853989DA FR 853989 A FR853989 A FR 853989A
- Authority
- FR
- France
- 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
- 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
- H01J29/58—Arrangements for focusing or reflecting ray or beam
- H01J29/64—Magnetic lenses
- H01J29/66—Magnetic lenses using electromagnetic means only
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR853989A true FR853989A (da) | 1940-04-03 |
Family
ID=1555049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR853989D Expired FR853989A (da) |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR853989A (da) |
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0
- FR FR853989D patent/FR853989A/fr not_active Expired