GB898461A - Improvements in and relating to cathode ray tube apparatus - Google Patents

Improvements in and relating to cathode ray tube apparatus

Info

Publication number
GB898461A
GB898461A GB21673/59A GB2167359A GB898461A GB 898461 A GB898461 A GB 898461A GB 21673/59 A GB21673/59 A GB 21673/59A GB 2167359 A GB2167359 A GB 2167359A GB 898461 A GB898461 A GB 898461A
Authority
GB
United Kingdom
Prior art keywords
assembly
discs
magnet
disc
magnetic half
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
GB21673/59A
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 GB898461A publication Critical patent/GB898461A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H04N5/645—Mounting of picture tube on chassis or in housing
    • 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

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)

Abstract

898,461. Cathode-ray tubes. PHlLCO CORPORATION. June 24, 1959 [June 24, 1958], No. 21673/59. Class 39(1). A magnetic shielding and beam centring assembly for a cathoderay tube consists of two magnetic half-discs 42, 44, Fig. 2B, of high permeability material, such as silicon steel, fixed to a conductive disc 40 of, e.g. copper or aluminium, and a rotatable magnet 32 bridging the gap 56 between the members 42 and 44. The assembly may be rotated as a whole, or a second similar assembly may be provided with its gap 56 perpendicular to that of the first assembly. In a modification magnetic half-discs 42, 44, Fig. 5, are provided with ear portions 80, 82, and the rotatable magnet 32 is pivoted near the edge of the magnetic half-discs so as to project through an opening in insulating housing 30. In other modifications disc 40 may be square or hexagonal in shape, and magnet 32 need not be circular and may be replaced by a simple bar magnet. The shielding effect of the assembly in preventing flux fringing of the horizontal and vertical deflection coils as a result of eddy currents induced in the disc 40, and the shunting effect of the magnetic half-discs 42, 44, are described with reference to Specification 898,460.
GB21673/59A 1958-06-24 1959-06-24 Improvements in and relating to cathode ray tube apparatus Expired GB898461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US744121A US2926272A (en) 1958-06-24 1958-06-24 Combined shielding and centering means for cathode ray tubes

Publications (1)

Publication Number Publication Date
GB898461A true GB898461A (en) 1962-06-06

Family

ID=24991514

Family Applications (1)

Application Number Title Priority Date Filing Date
GB21673/59A Expired GB898461A (en) 1958-06-24 1959-06-24 Improvements in and relating to cathode ray tube apparatus

Country Status (2)

Country Link
US (1) US2926272A (en)
GB (1) GB898461A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1144407B (en) * 1960-03-24 1963-02-28 Telefunken Patent Device to avoid distortion of the light spot in cathode ray tubes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2634381A (en) * 1951-03-26 1953-04-07 Zenith Radio Corp Cathode-ray tube beam-positioning device
US2717323A (en) * 1954-03-23 1955-09-06 Rca Corp Electron beam centering apparatus
US2817782A (en) * 1954-07-09 1957-12-24 Rca Corp Cathode ray tube deflection apparatus
US2761989A (en) * 1955-02-28 1956-09-04 Rca Corp Cathode ray tube device
US2813212A (en) * 1955-12-28 1957-11-12 Rca Corp Electromagnetic cathode ray beam deflection system

Also Published As

Publication number Publication date
US2926272A (en) 1960-02-23

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