GB716813A - Improvements in or relating to a beam-shaping assembly in a cathode ray tube - Google Patents

Improvements in or relating to a beam-shaping assembly in a cathode ray tube

Info

Publication number
GB716813A
GB716813A GB5490/52A GB549052A GB716813A GB 716813 A GB716813 A GB 716813A GB 5490/52 A GB5490/52 A GB 5490/52A GB 549052 A GB549052 A GB 549052A GB 716813 A GB716813 A GB 716813A
Authority
GB
United Kingdom
Prior art keywords
aperture
apertures
electrode
ray tube
cathode ray
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
GB5490/52A
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.)
International Business Machines Corp
Original Assignee
International Business Machines 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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB716813A publication Critical patent/GB716813A/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

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)

Abstract

716,813. Electron beam apparatus. INTERNATIONAL BUSINESS MACHINES CORPORATION. March 3, 1952 [June 29, 1951], No. 5490/52. Class 39(1) A cathode ray tube has beam forming means comprising a first electrode 17 with first and second apertures, a second electrode 20 having a third aperture and a third electrode 22 with a fourth aperture, the axial spacing between the first and third aperture closely approximating 12 times the diameter of the said first aperture and/or the axial spacing between the third aperture and the fluorescent screen of the tubes being about 2.67 times the axial spacing between the first and third apertures. The diameters of the first, second, third and fourth aperture and the spacings between the first and third apertures and between the third aperture and the screen vary by not more than 25 per cent from the ratios 100, 16, 130, 20, 1200 and 3250. The axial dimension of the deflecting plates 24, 26 is about 31 times the diameter of the second aperture. The ratio of the parallel spacing of the deflection plates and the axial dimension thereof is 3:5. The control grid 16 encloses the cathode and heater assembly. Further dimensions, voltages and deflection sensitivities for a digital storage tube are given in the Specification.
GB5490/52A 1951-06-29 1952-03-03 Improvements in or relating to a beam-shaping assembly in a cathode ray tube Expired GB716813A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US716813XA 1951-06-29 1951-06-29

Publications (1)

Publication Number Publication Date
GB716813A true GB716813A (en) 1954-10-13

Family

ID=22102893

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5490/52A Expired GB716813A (en) 1951-06-29 1952-03-03 Improvements in or relating to a beam-shaping assembly in a cathode ray tube

Country Status (2)

Country Link
BE (1) BE512479A (en)
GB (1) GB716813A (en)

Also Published As

Publication number Publication date
BE512479A (en)

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