GB673649A - Improvements in and relating to magneto-mechanical or electro-magneto-mechanical devices - Google Patents

Improvements in and relating to magneto-mechanical or electro-magneto-mechanical devices

Info

Publication number
GB673649A
GB673649A GB164649A GB164649A GB673649A GB 673649 A GB673649 A GB 673649A GB 164649 A GB164649 A GB 164649A GB 164649 A GB164649 A GB 164649A GB 673649 A GB673649 A GB 673649A
Authority
GB
United Kingdom
Prior art keywords
magnet
magneto
pole
mechanical
cylinder
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
GB164649A
Inventor
George Nelson Harding
Otto Franz Wilhelm Thal
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.)
National Research Development Corp UK
Original Assignee
National Research Development Corp UK
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 National Research Development Corp UK filed Critical National Research Development Corp UK
Priority to GB164649A priority Critical patent/GB673649A/en
Publication of GB673649A publication Critical patent/GB673649A/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]
    • H01F7/0205—Magnetic circuits with PM in general
    • H01F7/021—Construction of PM

Abstract

673,649. Magnetic couplings; electromagnets. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Feb. 17, 1950 [Jan. 20, 1949], No. 1646/49. Class 35. A spirally-magnetized magnet 21 is rotated by variation of the effective axial extent of a stationary pole member 23. In the form shown, this effective variation is produced by grading the spacing of the polepiece from the magnet so that progressive increases of flux produced by the coil 23b or an adjustable permanent magnet cause the shaded portions of the poles to become saturated. Thus the mean flux position and therefore the angle of the magnet is altered. In an alternative form, the pole may be tapered or wedge-shaped and be mounted to extend and be adjustable tangentially of the cylinder to change the axial extent of the overlap between the pole and the rotating magnet. In a modification, a pair of mutually sliding wedge-shaped members may be used. The magnet may be in the form of a twisted strip instead of a cylinder as shown.
GB164649A 1949-01-20 1949-01-20 Improvements in and relating to magneto-mechanical or electro-magneto-mechanical devices Expired GB673649A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB164649A GB673649A (en) 1949-01-20 1949-01-20 Improvements in and relating to magneto-mechanical or electro-magneto-mechanical devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB164649A GB673649A (en) 1949-01-20 1949-01-20 Improvements in and relating to magneto-mechanical or electro-magneto-mechanical devices

Publications (1)

Publication Number Publication Date
GB673649A true GB673649A (en) 1952-06-11

Family

ID=9725559

Family Applications (1)

Application Number Title Priority Date Filing Date
GB164649A Expired GB673649A (en) 1949-01-20 1949-01-20 Improvements in and relating to magneto-mechanical or electro-magneto-mechanical devices

Country Status (1)

Country Link
GB (1) GB673649A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981871A (en) * 1956-09-19 1961-04-25 Philips Corp Permanent magnet
US3937904A (en) * 1974-08-07 1976-02-10 Hitachi Magnetics Corporation Moving magnet electroacoustic transducer
FR2653589A1 (en) * 1989-10-23 1991-04-26 Moving Magnet Tech SINGLE-PHASE ELECTROMAGNETIC ACTUATOR.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2981871A (en) * 1956-09-19 1961-04-25 Philips Corp Permanent magnet
US3937904A (en) * 1974-08-07 1976-02-10 Hitachi Magnetics Corporation Moving magnet electroacoustic transducer
FR2653589A1 (en) * 1989-10-23 1991-04-26 Moving Magnet Tech SINGLE-PHASE ELECTROMAGNETIC ACTUATOR.
WO1991006108A1 (en) * 1989-10-23 1991-05-02 Moving Magnet Technologies S.A. Monophase electromagnetic actuator

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