GB934661A - Improvements in and relating to cathode ray tubes - Google Patents

Improvements in and relating to cathode ray tubes

Info

Publication number
GB934661A
GB934661A GB41766/59A GB4176659A GB934661A GB 934661 A GB934661 A GB 934661A GB 41766/59 A GB41766/59 A GB 41766/59A GB 4176659 A GB4176659 A GB 4176659A GB 934661 A GB934661 A GB 934661A
Authority
GB
United Kingdom
Prior art keywords
magnetic material
cathode
lens structure
ray tubes
dec
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
GB41766/59A
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.)
Space Systems Loral LLC
Original Assignee
Philco Ford Corp
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 Philco Ford Corp filed Critical Philco Ford Corp
Publication of GB934661A publication Critical patent/GB934661A/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
    • 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
    • H01J29/48—Electron guns
    • 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
    • H01J29/62—Electrostatic lenses
    • H01J29/622—Electrostatic lenses producing fields exhibiting symmetry of revolution
    • H01J29/624—Electrostatic lenses producing fields exhibiting symmetry of revolution co-operating with or closely associated to an electron gun
    • 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
    • H01J29/702—Convergence correction arrangements therefor
    • H01J29/703—Static convergence systems
    • 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
    • H01J29/707—Arrangements intimately associated with parts of the gun and co-operating with external magnetic excitation devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/58—Electron beam control inside the vessel
    • H01J2229/581—Electron beam control inside the vessel by magnetic means
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2229/00—Details of cathode ray tubes or electron beam tubes
    • H01J2229/58—Electron beam control inside the vessel
    • H01J2229/583—Electron beam control inside the vessel at the source
    • H01J2229/5835—Electron beam control inside the vessel at the source cooperating with the electron gun

Abstract

934,661. Cathode-ray tubes. PHILCO CORPORATION. Dec. 8, 1959 [Dec. 8, 1958], No. 41766/59. Class 39 (1). In a cathode-ray tube particularly of the type described in Specification 862,878, in which the electrostatic lens structure 16 is partially within the deflection yoke the second grid 22 which is cup-shaped, facing away from the cathode, and/or the first element 24 of the lens structure is/are formed at least in part of high permeability magnetic material of low residual magnetism and/or low coercive force in order to shield the beam from the fringing field of the deflection yoke. The magnetic material may be a stainless steel and magnetic material may be applied as a coating or overlay on non-magnetic material. The electrostatic lens structure 16 comprises a unipotential lens of which the outer elements 24, 28 are cupshaped. C-shaped beam centering magnets 46, 48 are provided. Specifications 898,460 and 898,461 are referred to.
GB41766/59A 1958-12-08 1959-12-08 Improvements in and relating to cathode ray tubes Expired GB934661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US778651A US3020434A (en) 1958-12-08 1958-12-08 Self shielding electron gun and cathode ray tube system including same

Publications (1)

Publication Number Publication Date
GB934661A true GB934661A (en) 1963-08-21

Family

ID=25114019

Family Applications (1)

Application Number Title Priority Date Filing Date
GB41766/59A Expired GB934661A (en) 1958-12-08 1959-12-08 Improvements in and relating to cathode ray tubes

Country Status (2)

Country Link
US (1) US3020434A (en)
GB (1) GB934661A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504312A1 (en) * 1981-04-16 1982-10-22 Philips Nv CATHODE RAY TUBE WITH BEAM ABERRATION CORRECTION

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3303444A (en) * 1964-07-16 1967-02-07 Videocraft Mfg Co Electron beam convergence and deflection apparatus
US3892992A (en) * 1964-12-21 1975-07-01 Hitachi Ltd Colour picture tubes
US3505560A (en) * 1967-12-01 1970-04-07 Gen Electric Wide raster correction for a color television receiver
JPS5331728Y2 (en) * 1973-10-05 1978-08-07
JPS5436829B2 (en) * 1973-10-26 1979-11-12
JPS5824373Y2 (en) * 1974-06-24 1983-05-25 株式会社日立製作所 Denshiji Yukoutai
JPS5824372Y2 (en) * 1974-06-24 1983-05-25 株式会社日立製作所 Denshiji Yukoutai
CA1108683A (en) * 1977-11-17 1981-09-08 Richard H. Hughes Electron gun exhibiting reduced flare
NL7907717A (en) * 1979-10-19 1981-04-22 Philips Nv DEVICE FOR DISPLAYING COLORED IMAGES.
US4335366A (en) * 1980-02-25 1982-06-15 Rca Corporation Color television display system having improved convergence
US4357556A (en) * 1980-10-14 1982-11-02 Rca Corporation Television display system employing permeable correctors for a deflection yoke
NL8600355A (en) * 1986-02-13 1987-09-01 Philips Nv DEVICE FOR DISPLAYING TELEVISION IMAGES AND DEFLECTOR THEREFOR.
NL8601003A (en) * 1986-03-28 1987-10-16 Philips Nv COLOR IMAGE TUBE WITH A DEFLECTION UNIT WITH IMAGE BALANCE CORRECTORS.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2719243A (en) * 1951-07-03 1955-09-27 Du Mont Allen B Lab Inc Electrostatic electron lens
US2732511A (en) * 1953-04-03 1956-01-24 Dichter
US2810091A (en) * 1954-03-31 1957-10-15 Rca Corp Ion trap
US2840739A (en) * 1956-10-12 1958-06-24 Thomas Electronics Inc Cathode ray tube gun assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2504312A1 (en) * 1981-04-16 1982-10-22 Philips Nv CATHODE RAY TUBE WITH BEAM ABERRATION CORRECTION

Also Published As

Publication number Publication date
US3020434A (en) 1962-02-06

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