GB940019A - Improvements in or relating to scanning coils - Google Patents

Improvements in or relating to scanning coils

Info

Publication number
GB940019A
GB940019A GB580259A GB580259A GB940019A GB 940019 A GB940019 A GB 940019A GB 580259 A GB580259 A GB 580259A GB 580259 A GB580259 A GB 580259A GB 940019 A GB940019 A GB 940019A
Authority
GB
United Kingdom
Prior art keywords
coils
produced
vertical
feb
coil
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
Application number
GB580259A
Inventor
Peter Harold Philips
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Plessey Co Ltd
Original Assignee
Plessey Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Priority to GB580259A priority Critical patent/GB940019A/en
Priority to FR818885A priority patent/FR1248886A/en
Publication of GB940019A publication Critical patent/GB940019A/en
Expired legal-status Critical Current

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
    • H01J29/70—Arrangements for deflecting ray or beam
    • H01J29/72—Arrangements for deflecting ray or beam along one straight line or along two perpendicular straight lines
    • H01J29/76—Deflecting by magnetic fields only
    • H01J29/762—Deflecting by magnetic fields only using saddle coils or printed windings

Landscapes

  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

940,019. Electron beam deflecting apparatus. PLESSEY CO. Ltd. Feb. 12, 1960 [Feb. 19, 1959], No. 5802/59. Heading H1D. The distortion effects of the vertical component of the earth's magnetic field upon the raster produced by the scanning coils of a cathode-ray tube are counteracted by employing a non-homogeneous magnetic deflecting field in which the field strength in the horizontal direction increases from one side to the other. In the case of saddle- or castellated-type coils, the horizontally directed magnetic flux produced by one of the vertical coils is increased as compared with that produced by the other vertical coil, by providing more turns on the one coil than on the other. When toroidal scanning coils are used, the correction is effected by positionally displacing the coils relative to the central horizontal plane as shown in Fig. 2A.
GB580259A 1959-02-19 1959-02-19 Improvements in or relating to scanning coils Expired GB940019A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB580259A GB940019A (en) 1959-02-19 1959-02-19 Improvements in or relating to scanning coils
FR818885A FR1248886A (en) 1959-02-19 1960-02-18 Improvements to deflection coils

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB580259A GB940019A (en) 1959-02-19 1959-02-19 Improvements in or relating to scanning coils

Publications (1)

Publication Number Publication Date
GB940019A true GB940019A (en) 1963-10-23

Family

ID=9802889

Family Applications (1)

Application Number Title Priority Date Filing Date
GB580259A Expired GB940019A (en) 1959-02-19 1959-02-19 Improvements in or relating to scanning coils

Country Status (2)

Country Link
FR (1) FR1248886A (en)
GB (1) GB940019A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965386A (en) * 1973-09-13 1976-06-22 U.S. Philips Corporation Degaussing device for a color television display tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3965386A (en) * 1973-09-13 1976-06-22 U.S. Philips Corporation Degaussing device for a color television display tube

Also Published As

Publication number Publication date
FR1248886A (en) 1960-12-23

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