GB744760A - Improvements in or relating to cathode ray tube apparatus - Google Patents

Improvements in or relating to cathode ray tube apparatus

Info

Publication number
GB744760A
GB744760A GB2932252A GB2932252A GB744760A GB 744760 A GB744760 A GB 744760A GB 2932252 A GB2932252 A GB 2932252A GB 2932252 A GB2932252 A GB 2932252A GB 744760 A GB744760 A GB 744760A
Authority
GB
United Kingdom
Prior art keywords
tube
cathode
ray tube
magnetizable
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
GB2932252A
Inventor
Anthony Victor De Vere Krause
Peter Andrew Reay Kinghorn
John Cedric Davies
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.)
Cinema Television Ltd
Original Assignee
Cinema 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 Cinema Television Ltd filed Critical Cinema Television Ltd
Priority to GB2932252A priority Critical patent/GB744760A/en
Publication of GB744760A publication Critical patent/GB744760A/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
    • H01J29/66—Magnetic lenses using electromagnetic means only

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

744,760. Cathode-ray tubes. CINEMATELEVISION, Ltd. Nov. 19, 1953 [Nov. 20, 1952], No. 29322/52. Drawings to Specification. Class 39 (1). In a cathode-ray tube astigmatism of the image produced by the electromagnetic focusing and deflecting coils is corrected by the rotation and longitudinal displacement of a non- magnetizable collar surrounding the neck of the tube, and carrying two magnetizable members of high permeability at diametrically opposite positions. The magnetizable members are magnetized by the field of the focusing coil. Preferably the collar is positioned on the gun side of the electromagnetic coils. It may be locked in position after adjustment. The cathode-ray tube may be a receiver tube, storage tube or transmitting tube such as an iconoscope, an image iconoscope or a monoscope.
GB2932252A 1952-11-20 1952-11-20 Improvements in or relating to cathode ray tube apparatus Expired GB744760A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2932252A GB744760A (en) 1952-11-20 1952-11-20 Improvements in or relating to cathode ray tube apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2932252A GB744760A (en) 1952-11-20 1952-11-20 Improvements in or relating to cathode ray tube apparatus

Publications (1)

Publication Number Publication Date
GB744760A true GB744760A (en) 1956-02-15

Family

ID=10289720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2932252A Expired GB744760A (en) 1952-11-20 1952-11-20 Improvements in or relating to cathode ray tube apparatus

Country Status (1)

Country Link
GB (1) GB744760A (en)

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