GB758930A - Improvements in or relating to magnetic systems for use with electron beams - Google Patents
Improvements in or relating to magnetic systems for use with electron beamsInfo
- Publication number
- GB758930A GB758930A GB24679/53A GB2467953A GB758930A GB 758930 A GB758930 A GB 758930A GB 24679/53 A GB24679/53 A GB 24679/53A GB 2467953 A GB2467953 A GB 2467953A GB 758930 A GB758930 A GB 758930A
- Authority
- GB
- United Kingdom
- Prior art keywords
- polepieces
- reluctance
- magnet
- increasing
- relating
- 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
- 238000010894 electron beam technology Methods 0.000 title 1
- 230000007423 decrease Effects 0.000 abstract 2
- 201000009310 astigmatism Diseases 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
- 229910000859 α-Fe Inorganic materials 0.000 abstract 1
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
- H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
-
- 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
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Particle Accelerators (AREA)
Abstract
758,930. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 7, 1953 [Sept. 10, 1952], No. 24679/53. Class 39 (1). [Also in Group XXXV] . In a deflecting magnet of the kind in which polepieces 3, 4 mounted on the ends of permanent or electromagnet 13 at the side of the tube 1, and project therefrom so as to embrace the tube, the polepieces are made so that their reluctance decreases with distance from the magnet. This reduces deflection astigmatism by increasing the proportion of the flux which can reach to the ends of the polepieces. The decrease in reluctance may be achieved by increasing the width, Fig. 2, or depth, Fig. 4, of the polepieces, or by making them of material of progressively increasing permeability for example, ferrites. The change of reluctance may begin right from the magnet or may only begin half-way along the polepiece.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL758930X | 1952-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB758930A true GB758930A (en) | 1956-10-10 |
Family
ID=19825356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB24679/53A Expired GB758930A (en) | 1952-09-10 | 1953-09-07 | Improvements in or relating to magnetic systems for use with electron beams |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US2805351A (en) |
| DE (1) | DE927588C (en) |
| FR (1) | FR1088646A (en) |
| GB (1) | GB758930A (en) |
| NL (2) | NL172387B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL95556C (en) * | 1952-10-18 | |||
| US2956198A (en) * | 1955-06-10 | 1960-10-11 | Bell Telephone Labor Inc | Traveling wave tubes |
| ITVI20060044A1 (en) * | 2006-02-08 | 2007-08-09 | Fabio Benetti | BOTTLE ATTA IN PARTICULAR TO THE CONTAINMENT OF BEVERAGES |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE972332C (en) * | 1938-11-24 | 1959-07-02 | Fernseh Gmbh | Electromagnetic deflection device for cathode ray tubes, especially for televisions |
| US2539156A (en) * | 1949-01-19 | 1951-01-23 | Tele Tone Radio Corp | Ion trap magnet |
| US2552342A (en) * | 1949-11-17 | 1951-05-08 | Clarostat Mfg Co Inc | Magnetic structure for use in ion-traps |
-
0
- NL NL80933D patent/NL80933C/xx active
- NL NLAANVRAGE6904234,A patent/NL172387B/en unknown
-
1953
- 1953-09-04 US US378602A patent/US2805351A/en not_active Expired - Lifetime
- 1953-09-06 DE DEN7702A patent/DE927588C/en not_active Expired
- 1953-09-07 GB GB24679/53A patent/GB758930A/en not_active Expired
- 1953-09-08 FR FR1088646D patent/FR1088646A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR1088646A (en) | 1955-03-09 |
| DE927588C (en) | 1955-05-12 |
| NL80933C (en) | |
| NL172387B (en) | |
| US2805351A (en) | 1957-09-03 |
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