GB770133A - Improvements in or relating to permanent magnets - Google Patents

Improvements in or relating to permanent magnets

Info

Publication number
GB770133A
GB770133A GB16030/55A GB1603055A GB770133A GB 770133 A GB770133 A GB 770133A GB 16030/55 A GB16030/55 A GB 16030/55A GB 1603055 A GB1603055 A GB 1603055A GB 770133 A GB770133 A GB 770133A
Authority
GB
United Kingdom
Prior art keywords
magnet
june
tube
relating
permanent magnets
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
GB16030/55A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB770133A publication Critical patent/GB770133A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0273—Magnetic circuits with PM for magnetic field generation
    • H01F7/0278—Magnetic circuits with PM for magnetic field generation for generating uniform fields, focusing, deflecting electrically charged particles
    • 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
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microwave Tubes (AREA)
  • Particle Accelerators (AREA)

Abstract

770,133. Magnets. COMPAGNIE GENERALE DE TELEGRAPHIE SANS FIL. June 3, 1955 [June 3, 1954], No. 16030/55. Class 35. [Also in Group XL (a)] A tubular permanent magnet for focusing electrons, e.g. in travelling wave tubes, has an internal cross-section which increases from a minimum at its centre to a maximum at its ends. The internal wall of the magnet may have a smooth surface as in Fig. 1 or stepped portions as in Fig. 2. The shape of the magnet flux flow may be modified by providing annular pole elements on the magnet ends as in Fig. 5 (not shown). In order to facilitate the mounting, of the magnet over an electronic tube, the magnet may consist of a number of elements assembled around the tube.
GB16030/55A 1954-06-03 1955-06-03 Improvements in or relating to permanent magnets Expired GB770133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1027813X 1954-06-03

Publications (1)

Publication Number Publication Date
GB770133A true GB770133A (en) 1957-03-13

Family

ID=9580903

Family Applications (1)

Application Number Title Priority Date Filing Date
GB16030/55A Expired GB770133A (en) 1954-06-03 1955-06-03 Improvements in or relating to permanent magnets

Country Status (3)

Country Link
DE (1) DE1027813B (en)
FR (1) FR1105964A (en)
GB (1) GB770133A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237059A (en) * 1962-10-04 1966-02-22 Siemens Ag Permanent magnet system for producing a magnetic field for the focused passage of a beam of electrons
US3373388A (en) * 1965-01-26 1968-03-12 Siemens Ag Permanent magnet system for the generation of at least two opposite magnetic fields lying one behind the other for the bundled guidance of an electron beam, especially for traveling wave tubes

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1114606A (en) * 1954-11-18 1956-04-16 Csf Improvements to permanent magnets
DE19939001A1 (en) * 1999-08-17 2001-03-15 Hans Helmut Rein Concentrating field lines of primary magnetic field in non-ferromagnetic material or in vacuum to form secondary magnetic field of increased flux density and with helical field lines

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3237059A (en) * 1962-10-04 1966-02-22 Siemens Ag Permanent magnet system for producing a magnetic field for the focused passage of a beam of electrons
US3373388A (en) * 1965-01-26 1968-03-12 Siemens Ag Permanent magnet system for the generation of at least two opposite magnetic fields lying one behind the other for the bundled guidance of an electron beam, especially for traveling wave tubes

Also Published As

Publication number Publication date
DE1027813B (en) 1958-04-10
FR1105964A (en) 1955-12-09

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