NL54993C - - Google Patents
Info
- Publication number
- NL54993C NL54993C NL91093A NL91093A NL54993C NL 54993 C NL54993 C NL 54993C NL 91093 A NL91093 A NL 91093A NL 91093 A NL91093 A NL 91093A NL 54993 C NL54993 C NL 54993C
- Authority
- NL
- Netherlands
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
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB42338A GB521439A (en) | 1938-11-18 | 1938-11-18 | Focussing magnets for cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL54993C true NL54993C (xx) | 1943-08-16 |
Family
ID=9704087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL91093A NL54993C (xx) | 1938-11-18 | 1938-12-15 |
Country Status (3)
| Country | Link |
|---|---|
| FR (1) | FR848180A (xx) |
| GB (1) | GB521439A (xx) |
| NL (1) | NL54993C (xx) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE893100C (de) * | 1941-03-27 | 1953-10-12 | Siemens Reiniger Werke Ag | Elektrische Entladungsroehre, insbesondere Roentgenroehre |
| DE943548C (de) * | 1944-05-31 | 1956-05-24 | Siemens Ag | Elektronenmikroskop mit zwei permanentmagnetisch erregten Abbildungslinsen |
| GB670431A (en) * | 1949-02-24 | 1952-04-16 | Patrick Richard James Court | Magnetic focussing device for cathode ray tubes |
| US2533687A (en) * | 1949-05-27 | 1950-12-12 | Quam Nichols Company | Magnetic focusing device |
| US2533688A (en) * | 1950-01-31 | 1950-12-12 | Quam Nichols Company | Focusing device |
| US2594099A (en) * | 1950-04-22 | 1952-04-22 | Ite Circuit Breaker Ltd | Focusing coil for cathode-ray tubes |
| US2533689A (en) * | 1950-06-28 | 1950-12-12 | Quam Nichols Company | Magnetic focusing device |
| US2581657A (en) * | 1950-07-26 | 1952-01-08 | Myron R Heppner | Focusing and centering device for cathode-ray tubes |
| US2568668A (en) * | 1950-08-18 | 1951-09-18 | Best Mfg Co Inc | Cathode-ray tube focusing device of the permanent magnet type |
| US2592185A (en) * | 1950-12-09 | 1952-04-08 | Quam Nichols Company | Focusing device |
| US2580606A (en) * | 1951-03-21 | 1952-01-01 | Best Mfg Company Inc | Cathode-ray tube focusing device |
| GB0912332D0 (en) * | 2009-07-16 | 2009-08-26 | Vg Systems Ltd | Magnetic lens,method for focussing charged particles and charged particle energy analyser |
| EP2827357A1 (en) | 2013-07-18 | 2015-01-21 | Fei Company | Magnetic lens for focusing a beam of charged particles |
-
1938
- 1938-11-18 GB GB42338A patent/GB521439A/en not_active Expired
- 1938-12-15 NL NL91093A patent/NL54993C/xx active
- 1938-12-30 FR FR848180D patent/FR848180A/fr not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB521439A (en) | 1940-05-22 |
| FR848180A (fr) | 1939-10-24 |