GB836770A - Magnetic focusing assembly - Google Patents

Magnetic focusing assembly

Info

Publication number
GB836770A
GB836770A GB20859A GB20859A GB836770A GB 836770 A GB836770 A GB 836770A GB 20859 A GB20859 A GB 20859A GB 20859 A GB20859 A GB 20859A GB 836770 A GB836770 A GB 836770A
Authority
GB
United Kingdom
Prior art keywords
focusing assembly
magnetic focusing
electron beam
reluctance
magnetic
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
GB20859A
Inventor
Arthur James Tyrrell
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 Components Ltd
Original Assignee
Mullard 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 Mullard Ltd filed Critical Mullard Ltd
Priority to GB20859A priority Critical patent/GB836770A/en
Publication of GB836770A publication Critical patent/GB836770A/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

Landscapes

  • Magnetic Resonance Imaging Apparatus (AREA)
  • Radiation-Therapy Devices (AREA)

Abstract

836,770. Electron beam focusing apparatus. MULLARD Ltd. Jan. 2, 1959, No. 208/59. Class 39(1). A magnetic focusing assembly for an electron beam comprises two coaxial magnets 7, Fig. 4 low reluctance and plates 12 and three of more low reluctance connecting limbs 13, at least two of which include a variable reluctance means 14 so that the position of the beam cross-over may be adjusted. Each variable reluctance means consists of a brass insert 17, Fig. 6, and a threaded magnetic shunt 19.
GB20859A 1959-01-02 1959-01-02 Magnetic focusing assembly Expired GB836770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB20859A GB836770A (en) 1959-01-02 1959-01-02 Magnetic focusing assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB20859A GB836770A (en) 1959-01-02 1959-01-02 Magnetic focusing assembly

Publications (1)

Publication Number Publication Date
GB836770A true GB836770A (en) 1960-06-09

Family

ID=9700306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20859A Expired GB836770A (en) 1959-01-02 1959-01-02 Magnetic focusing assembly

Country Status (1)

Country Link
GB (1) GB836770A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1491519B1 (en) * 1963-12-12 1970-03-05 Varian Associates Shielded permanent magnetic focusing arrangement for elongated transit tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1491519B1 (en) * 1963-12-12 1970-03-05 Varian Associates Shielded permanent magnetic focusing arrangement for elongated transit tubes

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