GB750310A - Improvements in or relating to cathode ray tubes - Google Patents
Improvements in or relating to cathode ray tubesInfo
- Publication number
- GB750310A GB750310A GB983053A GB983053A GB750310A GB 750310 A GB750310 A GB 750310A GB 983053 A GB983053 A GB 983053A GB 983053 A GB983053 A GB 983053A GB 750310 A GB750310 A GB 750310A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cone
- tube
- deflection
- poles
- cathode
- 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
- 230000005291 magnetic effect Effects 0.000 abstract 2
- 240000000136 Scabiosa atropurpurea Species 0.000 abstract 1
- 230000005294 ferromagnetic effect Effects 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract 1
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal 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
- H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
- H01J29/70—Arrangements for deflecting ray or beam
- H01J29/701—Systems for correcting deviation or convergence of a plurality of beams by means of magnetic fields at least
Landscapes
- Video Image Reproduction Devices For Color Tv Systems (AREA)
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
Abstract
750,310. Cathode-ray tubes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. April 12, 1954 [April 10, 1953], No. 9830/53. Drawings to Specification. Class 39 (1). [Also in Group XXXV] In a cathode-ray tube of the ferro-magnetic metal cone type the cone is permanently magnetized to provide eight equally-spaced magnetic poles around its circumference, the poles being alternately north and south and so positioned that the extensions of imaginary lines in the plane of the picture area perpendicularly bisecting both pairs of opposite sides of the picture area intersect the cone or an extension thereof midway between two adjacent poles of opposite name, and wherein the distribution of magnetic potential of the eight pole field around the tube is given by the equation P=A sin 4#, where A is a constant, 6 being measured about the axis of the tube from a zero line constituted by one of the lines bisecting one of the sides of the picture. This arrangement causes a small deflection of the beam which eliminates or reduces pin-cushion distortion due to the variation of distance from the centre of deflection to the flat or slightly curved screen with angle of scanning deflection. The cone is made of chrome-iron. The Provisional Specification states in addition that the condition P=A sin 46 need not be satisfied exactly and that by suitable design of the coils used to magnetize the envelope a sufficiently good approximation to this ideal condition can be obtained.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB983053A GB750310A (en) | 1953-04-10 | 1953-04-10 | Improvements in or relating to cathode ray tubes |
| DEM22692A DE952100C (en) | 1953-04-10 | 1954-04-10 | Cathode ray tubes, in particular picture tubes for television reproduction |
| FR1110718D FR1110718A (en) | 1953-04-10 | 1954-06-01 | Improvements to cathode-ray tubes for television and other similar uses |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB983053A GB750310A (en) | 1953-04-10 | 1953-04-10 | Improvements in or relating to cathode ray tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB750310A true GB750310A (en) | 1956-06-13 |
Family
ID=9879601
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB983053A Expired GB750310A (en) | 1953-04-10 | 1953-04-10 | Improvements in or relating to cathode ray tubes |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE952100C (en) |
| FR (1) | FR1110718A (en) |
| GB (1) | GB750310A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1221946B (en) * | 1963-10-09 | 1966-07-28 | Standard Pyrotechnik Meissner | Process for the production of pyrotechnic light and signal sets |
| DE2736162A1 (en) * | 1976-08-24 | 1978-03-09 | Philips Nv | DEVICE FOR REPLAYING TELEVISION PICTURES, DEFLECTION SYSTEM FOR SUCH A DEVICE, AND TUBE FITTED WITH SUCH A DEFLECTION SYSTEM |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4070597A (en) * | 1976-04-22 | 1978-01-24 | General Electric Company | Multi-apertured single plate matrix lens |
-
1953
- 1953-04-10 GB GB983053A patent/GB750310A/en not_active Expired
-
1954
- 1954-04-10 DE DEM22692A patent/DE952100C/en not_active Expired
- 1954-06-01 FR FR1110718D patent/FR1110718A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1221946B (en) * | 1963-10-09 | 1966-07-28 | Standard Pyrotechnik Meissner | Process for the production of pyrotechnic light and signal sets |
| DE2736162A1 (en) * | 1976-08-24 | 1978-03-09 | Philips Nv | DEVICE FOR REPLAYING TELEVISION PICTURES, DEFLECTION SYSTEM FOR SUCH A DEVICE, AND TUBE FITTED WITH SUCH A DEFLECTION SYSTEM |
Also Published As
| Publication number | Publication date |
|---|---|
| FR1110718A (en) | 1956-02-16 |
| DE952100C (en) | 1956-11-08 |
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