GB459860A - Improvements in or relating to focusing means for cathode-ray tubes and the like - Google Patents

Improvements in or relating to focusing means for cathode-ray tubes and the like

Info

Publication number
GB459860A
GB459860A GB2015235A GB2015235A GB459860A GB 459860 A GB459860 A GB 459860A GB 2015235 A GB2015235 A GB 2015235A GB 2015235 A GB2015235 A GB 2015235A GB 459860 A GB459860 A GB 459860A
Authority
GB
United Kingdom
Prior art keywords
polepiece
tube
magnet
cathode
relating
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
GB2015235A
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.)
Baird Television Ltd
Original Assignee
Baird Television 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 Baird Television Ltd filed Critical Baird Television Ltd
Priority to GB2015235A priority Critical patent/GB459860A/en
Publication of GB459860A publication Critical patent/GB459860A/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
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H01J29/64—Magnetic lenses
    • H01J29/68—Magnetic lenses using permanent magnets only

Landscapes

  • Processing Of Solid Wastes (AREA)

Abstract

459,860. Permanent magnets. SZEGHO, C., and BAIRD TELEVISION, Ltd., 58, Victoria Street, Westminster. July 15, 1935. No. 20152. [Class 35] [See also Group XL] A permanent magnet for focusing the beam in a cathoderay tube is in the form of a figure of rotation, and is adapted to fit on the tube, the distance between the polepieces being adjustable. As shown, the magnet 1 has a central aperture in which the tube is arranged, and an annular soft iron polepiece 3 is screwed into a bored out polepiece, so that the gap between the polepieces 3, 4 may be adjusted ; or the polepiece 3 may be screwed into a soft-iron insert on the magnet, and may be a push fit. A toothed driving mechanism for the polepiece 3 may be provided.
GB2015235A 1935-07-15 1935-07-15 Improvements in or relating to focusing means for cathode-ray tubes and the like Expired GB459860A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2015235A GB459860A (en) 1935-07-15 1935-07-15 Improvements in or relating to focusing means for cathode-ray tubes and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2015235A GB459860A (en) 1935-07-15 1935-07-15 Improvements in or relating to focusing means for cathode-ray tubes and the like

Publications (1)

Publication Number Publication Date
GB459860A true GB459860A (en) 1937-01-15

Family

ID=10141229

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2015235A Expired GB459860A (en) 1935-07-15 1935-07-15 Improvements in or relating to focusing means for cathode-ray tubes and the like

Country Status (1)

Country Link
GB (1) GB459860A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580606A (en) * 1951-03-21 1952-01-01 Best Mfg Company Inc Cathode-ray tube focusing device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2580606A (en) * 1951-03-21 1952-01-01 Best Mfg Company Inc Cathode-ray tube focusing device

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