GB890843A - Electron tube magnetic focussing device - Google Patents

Electron tube magnetic focussing device

Info

Publication number
GB890843A
GB890843A GB5559/59A GB555959A GB890843A GB 890843 A GB890843 A GB 890843A GB 5559/59 A GB5559/59 A GB 5559/59A GB 555959 A GB555959 A GB 555959A GB 890843 A GB890843 A GB 890843A
Authority
GB
United Kingdom
Prior art keywords
magnetic
magnets
travelling
pole
pieces
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
GB5559/59A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB5559/59A priority Critical patent/GB890843A/en
Publication of GB890843A publication Critical patent/GB890843A/en
Priority to GB4144663A priority patent/GB982827A/en
Priority to NL6412223A priority patent/NL6412223A/xx
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/08—Focusing arrangements, e.g. for concentrating stream of electrons, for preventing spreading of stream
    • H01J23/087—Magnetic focusing arrangements
    • H01J23/0873—Magnetic focusing arrangements with at least one axial-field reversal along the interaction space, e.g. P.P.M. focusing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/385—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material
    • B41J2/39—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by selective supply of electric current or selective application of magnetism to a printing or impression-transfer material using multi-stylus heads
    • B41J2/395—Structure of multi-stylus heads

Landscapes

  • Microwave Tubes (AREA)
  • Particle Accelerators (AREA)

Abstract

890,843. Travelling-wave tubes STANDARD TELEPHONES & CABLES Ltd. (Nippon Electric Co. Ltd.) Feb. 18, 1959, No. 5559/59. Class 39(1) A periodic magnetic focusing system A, Fig. 1, in the region of the waveguide feeder of a travelling-wave tube comprises two cylindrical magnets 1, 2 on either side of the feeder 3, pole-pieces 4, 5 having external projections for controlling the amount of magnetic flux passing through the two magnets in common, and polepieces 6, 7 for controlling the distribution of the magnetic field in the vicinity of the electron beam. The design of the system is described in detail and is such that the magnetic field intensity on the axis of the beam conforms with the fields produced by the main periodic focusing system B: In modifications supplemental magnets may be provided between pole-pieces 6 and 7 to provide aiding flux or a magnetic shunting circuit comprising iron spokes 10, 11, Fig. 3, and iron bars 14 may be attached to the magnets 1 and 2. The support rings 12 and 13 may be of magnetic or non-magnetic material.
GB5559/59A 1959-02-18 1959-02-18 Electron tube magnetic focussing device Expired GB890843A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB5559/59A GB890843A (en) 1959-02-18 1959-02-18 Electron tube magnetic focussing device
GB4144663A GB982827A (en) 1959-02-18 1963-10-21 Permanent magnet periodic focusing structures for travelling wave tubes
NL6412223A NL6412223A (en) 1959-02-18 1964-10-21

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB5559/59A GB890843A (en) 1959-02-18 1959-02-18 Electron tube magnetic focussing device
GB4144663A GB982827A (en) 1959-02-18 1963-10-21 Permanent magnet periodic focusing structures for travelling wave tubes

Publications (1)

Publication Number Publication Date
GB890843A true GB890843A (en) 1962-03-07

Family

ID=37575228

Family Applications (2)

Application Number Title Priority Date Filing Date
GB5559/59A Expired GB890843A (en) 1959-02-18 1959-02-18 Electron tube magnetic focussing device
GB4144663A Expired GB982827A (en) 1959-02-18 1963-10-21 Permanent magnet periodic focusing structures for travelling wave tubes

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB4144663A Expired GB982827A (en) 1959-02-18 1963-10-21 Permanent magnet periodic focusing structures for travelling wave tubes

Country Status (2)

Country Link
GB (2) GB890843A (en)
NL (1) NL6412223A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8424268D0 (en) * 1984-09-26 1984-10-31 Wymbs Eng Ltd Valve arrangement

Also Published As

Publication number Publication date
GB982827A (en) 1965-02-10
NL6412223A (en) 1965-04-22

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