GB720662A - Improvements in or relating to permanent magnet electron lenses - Google Patents
Improvements in or relating to permanent magnet electron lensesInfo
- Publication number
- GB720662A GB720662A GB3164/53A GB316453A GB720662A GB 720662 A GB720662 A GB 720662A GB 3164/53 A GB3164/53 A GB 3164/53A GB 316453 A GB316453 A GB 316453A GB 720662 A GB720662 A GB 720662A
- Authority
- GB
- United Kingdom
- Prior art keywords
- springs
- flanges
- lens
- permanent magnet
- adjustable
- 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
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
- H01J29/68—Magnetic lenses using permanent magnets only
Landscapes
- Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Transforming Electric Information Into Light Information (AREA)
Abstract
720,662. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Feb. 4, 1953 [Feb. 7, 1952], No. 3164/53. Class 39 (1) A permanent magnet lens comprises two coaxial tubular members, the ends of which are coupled by flanges, the inner member having an annular air gap axially adjustable by a tubular shunt held coaxially adjustable within the lens by a plurality of leaf springs arranged in spaced planes perpendicular to the lens axis. A tubular permanent magnet 1 supports flanges 7, 9, the air gap 5 in which is adjustable by a soft iron shunt 13 supported on annular flat springs 15, 17 which are .carried by the flanges 7, 9 through bolts 19, 21 and spacers 23, 27. One of the extensions 3', 3" on the flanges may be dispensed with; the lens may be used in an oscilloscope or television receiver. Arranged angularly at a distance of 90 degrees from the points at which the springs are secured, rods 33 are attached to the springs and carry extensions which can be moved against the action of the springs by a fork-shaped member 43 operated by a Bowden cable 39 which is connected to the front panel of a receiver. Slack in one of the springs may be removed by making a double bend therein. In a modification, the ring 13 may be arranged within the part 3' and is connected to the springs by brass tags.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL720662X | 1952-02-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB720662A true GB720662A (en) | 1954-12-22 |
Family
ID=19816059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3164/53A Expired GB720662A (en) | 1952-02-07 | 1953-02-04 | Improvements in or relating to permanent magnet electron lenses |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE924705C (en) |
| FR (1) | FR1070399A (en) |
| GB (1) | GB720662A (en) |
| NL (1) | NL81057C (en) |
-
0
- NL NL81057D patent/NL81057C/xx active
-
1953
- 1953-02-04 GB GB3164/53A patent/GB720662A/en not_active Expired
- 1953-02-05 DE DEN6702A patent/DE924705C/en not_active Expired
- 1953-02-06 FR FR1070399D patent/FR1070399A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| NL81057C (en) | |
| FR1070399A (en) | 1954-07-23 |
| DE924705C (en) | 1955-03-07 |
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