GB708137A - Improvements in devices comprising a cathode-ray tube - Google Patents

Improvements in devices comprising a cathode-ray tube

Info

Publication number
GB708137A
GB708137A GB20142/51A GB2014251A GB708137A GB 708137 A GB708137 A GB 708137A GB 20142/51 A GB20142/51 A GB 20142/51A GB 2014251 A GB2014251 A GB 2014251A GB 708137 A GB708137 A GB 708137A
Authority
GB
United Kingdom
Prior art keywords
cathode
poles
coils
ray
group xxxv
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
GB20142/51A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB708137A publication Critical patent/GB708137A/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
    • H01J29/54—Arrangements for centring ray or beam

Landscapes

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

Abstract

708,137. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Aug. 27, 1951 [April 23, 1951], No. 20142/51. Class 39(1) [Also in Group XXXV] A cathode-ray t u b e having one or more deflecting coils is provided with one or more non- conductive permanent magnets adjacent the coils to adjust the position of the beam, the ratio between the remanent induction and the coercive field strength of the magnet material being four at the most so that deflection errors are not caused by eddy currents in the permanent magnet. The tube may be used in radar for P.P.I. or in television. Segmental poles of the material, which as described in Specification 708,127, [Group XXXV], comprises non-cubic crystals of polyoxides of iron and at least one of the metals barium, strontium, lead and calcium, are secured to a ring 5, Fig. 1, of ferrite or sheet iron adjacent the motor-driven rotatable deflecting coils 3. In a modification, two sets of poles 7, 8, Fig. 3, are arranged in two rotatable rings 6, 6<SP>1</SP>.
GB20142/51A 1951-04-23 1951-08-27 Improvements in devices comprising a cathode-ray tube Expired GB708137A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL293285X 1951-04-23

Publications (1)

Publication Number Publication Date
GB708137A true GB708137A (en) 1954-04-28

Family

ID=19782857

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20142/51A Expired GB708137A (en) 1951-04-23 1951-08-27 Improvements in devices comprising a cathode-ray tube

Country Status (6)

Country Link
BE (1) BE505469A (en)
CH (1) CH293285A (en)
DE (1) DE974968C (en)
FR (1) FR1041526A (en)
GB (1) GB708137A (en)
NL (2) NL82590C (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1203966B (en) * 1953-06-29 1965-10-28 Decca Ltd Radar map indicator
DE2752252C2 (en) * 1977-11-23 1987-04-23 Philips Patentverwaltung Gmbh, 2000 Hamburg Method for producing a magnetic correction ring for television picture tubes

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH185511A (en) * 1933-07-08 1936-07-31 Loewe Opta Gmbh Cathode ray tube.
NL48160C (en) * 1936-03-03
US2544898A (en) * 1949-12-31 1951-03-13 Guardian Electric Mfg Co Centering device for beams of cathode-ray tubes

Also Published As

Publication number Publication date
FR1041526A (en) 1953-10-23
NL160740B (en)
BE505469A (en)
NL82590C (en)
DE974968C (en) 1961-06-15
CH293285A (en) 1953-09-15

Similar Documents

Publication Publication Date Title
US2157182A (en) Cathode ray deflecting device
US2513929A (en) Beam centering device for cathode-ray tubes
GB745099A (en) Arrangement for magnetic concentration of an electron beam in a travelling wave tube
GB605341A (en) Electron focusing apparatus
US2539156A (en) Ion trap magnet
GB643280A (en) Improvements in cathode-ray tubes for television
US2730642A (en) Device comprising a cathode-ray tube
GB708137A (en) Improvements in devices comprising a cathode-ray tube
GB729840A (en) Improvements in magnetic electron lenses
GB670021A (en) Improvements in beam centering devices for cathode ray tubes
US3098942A (en) Magnetic centering device for cathode ray tubes
GB720776A (en) Improvements relating to magnetic focusing devices for electron beams
US2563525A (en) Image size control device for
GB1077412A (en) Cathode-ray tube beam controlling device
GB699830A (en) Improvements in magnetic electron lenses
GB477539A (en) Improvements in or relating to magnetic deflecting means for electron discharge devices
US2727192A (en) Magnetic body comprising a ferromagnetic part having a high permeability and a thin permanent magnet
GB729918A (en) Improvements in or relating to magnetic deflecting means for cathode ray tubes
GB774401A (en) Improvements in or relating to magnetic scanning circuits for cathode-ray tubes and the like
US3205414A (en) Correction magnets for cathode-ray tubes and methods for magnetizing same
GB670431A (en) Magnetic focussing device for cathode ray tubes
GB709382A (en) Improvements relating to means for deflecting the ray of a cathode-ray tube
US3061753A (en) Indicating system comprising a cathode ray tube
GB495338A (en) Improvements in or relating to electron discharge devices for use in television for example
GB612906A (en) Improvements in or relating to magnetic deflecting means for cathode ray tubes