GB758930A - Improvements in or relating to magnetic systems for use with electron beams - Google Patents

Improvements in or relating to magnetic systems for use with electron beams

Info

Publication number
GB758930A
GB758930A GB24679/53A GB2467953A GB758930A GB 758930 A GB758930 A GB 758930A GB 24679/53 A GB24679/53 A GB 24679/53A GB 2467953 A GB2467953 A GB 2467953A GB 758930 A GB758930 A GB 758930A
Authority
GB
United Kingdom
Prior art keywords
polepieces
reluctance
magnet
increasing
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
GB24679/53A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB758930A publication Critical patent/GB758930A/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
    • H01J29/84—Traps for removing or diverting unwanted particles, e.g. negative ions, fringing electrons; Arrangements for velocity or mass selection
    • 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

Abstract

758,930. Cathode-ray tubes. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Sept. 7, 1953 [Sept. 10, 1952], No. 24679/53. Class 39 (1). [Also in Group XXXV] . In a deflecting magnet of the kind in which polepieces 3, 4 mounted on the ends of permanent or electromagnet 13 at the side of the tube 1, and project therefrom so as to embrace the tube, the polepieces are made so that their reluctance decreases with distance from the magnet. This reduces deflection astigmatism by increasing the proportion of the flux which can reach to the ends of the polepieces. The decrease in reluctance may be achieved by increasing the width, Fig. 2, or depth, Fig. 4, of the polepieces, or by making them of material of progressively increasing permeability for example, ferrites. The change of reluctance may begin right from the magnet or may only begin half-way along the polepiece.
GB24679/53A 1952-09-10 1953-09-07 Improvements in or relating to magnetic systems for use with electron beams Expired GB758930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL758930X 1952-09-10

Publications (1)

Publication Number Publication Date
GB758930A true GB758930A (en) 1956-10-10

Family

ID=19825356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24679/53A Expired GB758930A (en) 1952-09-10 1953-09-07 Improvements in or relating to magnetic systems for use with electron beams

Country Status (5)

Country Link
US (1) US2805351A (en)
DE (1) DE927588C (en)
FR (1) FR1088646A (en)
GB (1) GB758930A (en)
NL (2) NL172387B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL95556C (en) * 1952-10-18
US2956198A (en) * 1955-06-10 1960-10-11 Bell Telephone Labor Inc Traveling wave tubes
ITVI20060044A1 (en) * 2006-02-08 2007-08-09 Fabio Benetti BOTTLE ATTA IN PARTICULAR TO THE CONTAINMENT OF BEVERAGES

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE972332C (en) * 1938-11-24 1959-07-02 Fernseh Gmbh Electromagnetic deflection device for cathode ray tubes, especially for televisions
US2539156A (en) * 1949-01-19 1951-01-23 Tele Tone Radio Corp Ion trap magnet
US2552342A (en) * 1949-11-17 1951-05-08 Clarostat Mfg Co Inc Magnetic structure for use in ion-traps

Also Published As

Publication number Publication date
NL172387B (en)
FR1088646A (en) 1955-03-09
US2805351A (en) 1957-09-03
NL80933C (en)
DE927588C (en) 1955-05-12

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