GB898461A - Improvements in and relating to cathode ray tube apparatus - Google Patents
Improvements in and relating to cathode ray tube apparatusInfo
- Publication number
- GB898461A GB898461A GB21673/59A GB2167359A GB898461A GB 898461 A GB898461 A GB 898461A GB 21673/59 A GB21673/59 A GB 21673/59A GB 2167359 A GB2167359 A GB 2167359A GB 898461 A GB898461 A GB 898461A
- Authority
- GB
- United Kingdom
- Prior art keywords
- assembly
- discs
- magnet
- disc
- magnetic half
- 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
- 230000000694 effects Effects 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 2
- 238000012986 modification Methods 0.000 abstract 2
- 229910000976 Electrical steel Inorganic materials 0.000 abstract 1
- 239000004411 aluminium Substances 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract 1
- 229910052782 aluminium Inorganic materials 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- 230000035699 permeability Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
- H04N5/645—Mounting of picture tube on chassis or in housing
-
- 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
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Video Image Reproduction Devices For Color Tv Systems (AREA)
Abstract
898,461. Cathode-ray tubes. PHlLCO CORPORATION. June 24, 1959 [June 24, 1958], No. 21673/59. Class 39(1). A magnetic shielding and beam centring assembly for a cathoderay tube consists of two magnetic half-discs 42, 44, Fig. 2B, of high permeability material, such as silicon steel, fixed to a conductive disc 40 of, e.g. copper or aluminium, and a rotatable magnet 32 bridging the gap 56 between the members 42 and 44. The assembly may be rotated as a whole, or a second similar assembly may be provided with its gap 56 perpendicular to that of the first assembly. In a modification magnetic half-discs 42, 44, Fig. 5, are provided with ear portions 80, 82, and the rotatable magnet 32 is pivoted near the edge of the magnetic half-discs so as to project through an opening in insulating housing 30. In other modifications disc 40 may be square or hexagonal in shape, and magnet 32 need not be circular and may be replaced by a simple bar magnet. The shielding effect of the assembly in preventing flux fringing of the horizontal and vertical deflection coils as a result of eddy currents induced in the disc 40, and the shunting effect of the magnetic half-discs 42, 44, are described with reference to Specification 898,460.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US744121A US2926272A (en) | 1958-06-24 | 1958-06-24 | Combined shielding and centering means for cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB898461A true GB898461A (en) | 1962-06-06 |
Family
ID=24991514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21673/59A Expired GB898461A (en) | 1958-06-24 | 1959-06-24 | Improvements in and relating to cathode ray tube apparatus |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US2926272A (en) |
| GB (1) | GB898461A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1144407B (en) * | 1960-03-24 | 1963-02-28 | Telefunken Patent | Device to avoid distortion of the light spot in cathode ray tubes |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2634381A (en) * | 1951-03-26 | 1953-04-07 | Zenith Radio Corp | Cathode-ray tube beam-positioning device |
| US2717323A (en) * | 1954-03-23 | 1955-09-06 | Rca Corp | Electron beam centering apparatus |
| US2817782A (en) * | 1954-07-09 | 1957-12-24 | Rca Corp | Cathode ray tube deflection apparatus |
| US2761989A (en) * | 1955-02-28 | 1956-09-04 | Rca Corp | Cathode ray tube device |
| US2813212A (en) * | 1955-12-28 | 1957-11-12 | Rca Corp | Electromagnetic cathode ray beam deflection system |
-
1958
- 1958-06-24 US US744121A patent/US2926272A/en not_active Expired - Lifetime
-
1959
- 1959-06-24 GB GB21673/59A patent/GB898461A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2926272A (en) | 1960-02-23 |
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