GB1058388A - Adjustable magnets - Google Patents

Adjustable magnets

Info

Publication number
GB1058388A
GB1058388A GB38285/64A GB3828564A GB1058388A GB 1058388 A GB1058388 A GB 1058388A GB 38285/64 A GB38285/64 A GB 38285/64A GB 3828564 A GB3828564 A GB 3828564A GB 1058388 A GB1058388 A GB 1058388A
Authority
GB
United Kingdom
Prior art keywords
magnetic
polepiece
sept
gap
members
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
GB38285/64A
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.)
Varian Medical Systems Inc
Original Assignee
Varian Associates Inc
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 Varian Associates Inc filed Critical Varian Associates Inc
Publication of GB1058388A publication Critical patent/GB1058388A/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
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/20—Electromagnets; Actuators including electromagnets without armatures
    • H01F7/202—Electromagnets for high magnetic field strength

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)

Abstract

1,058,388. Electromagnets. VARIAN ASSOCIATES. Sept. 18, 1964 [Sept. 23, 1963], No. 38286/64. Heading H1P. In a magnetic structure having opposing magnetic pole members 14 separated by a non- magnetic gap, at least one of the members 14 comprises a polepiece 28 containing a magnetic body 38 which to vary the flux distribution in the gap is displaceable relative to a pole cap 26 which terminates the polepiece at its end nearer the other member 14. As shown, the body 38 is a flexible steel disc which can be deformed against a fulcrum edge A by rotation of a control nut 44, the flux being created by an electrical coil assembly 16 secured to a yoke side member 18. In a modification, the disc is deformed against concentric rings and the control is via a vernier screw thread. In another embodiment, the body is a sleeve (86), Fig. 5 (not shown), which is axially slidable within a polepiece ring (92). The structure is to provide a high-intensity homogeneous and uniform field in magnetic resonance spectroscopy applications.
GB38285/64A 1963-09-23 1964-09-18 Adjustable magnets Expired GB1058388A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US310938A US3223897A (en) 1963-09-23 1963-09-23 Apparatus for adjusting the configuration of a magnetic field

Publications (1)

Publication Number Publication Date
GB1058388A true GB1058388A (en) 1967-02-08

Family

ID=23204693

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38285/64A Expired GB1058388A (en) 1963-09-23 1964-09-18 Adjustable magnets

Country Status (3)

Country Link
US (1) US3223897A (en)
DE (1) DE1439896B2 (en)
GB (1) GB1058388A (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3737133A1 (en) * 1987-11-02 1989-05-11 Siemens Ag Homogeneous field magnet with profiled pole plates
US5134374A (en) * 1989-06-01 1992-07-28 Applied Superconetics Magnetic field control apparatus
US5097240A (en) * 1989-06-16 1992-03-17 Sumitomo Special Metal Co., Ltd. Magnetic field generating device for esr system
US5003276A (en) * 1989-08-11 1991-03-26 General Atomics Method of site shimming on permanent magnets
US5218333A (en) * 1989-10-02 1993-06-08 Sumitomo Special Metal Co., Ltd. Magnetic field generating device for use with ESR device
US5117188A (en) * 1990-10-29 1992-05-26 General Atomics Quasi-open magnet configuration for use in magnetic resonance imaging
US5414399A (en) * 1991-12-19 1995-05-09 Applied Superconetics, Inc. Open access superconducting MRI magnet having an apparatus for reducing magnetic hysteresis in superconducting MRI systems
US5412363A (en) * 1991-12-20 1995-05-02 Applied Superconetics, Inc. Open access superconducting MRI magnet
EP0616230B1 (en) * 1993-03-15 1998-08-05 Siemens Aktiengesellschaft Homogeneous field magnet with pole plate spaced by correction air-gap for each pole shoe
FI933834A (en) * 1993-09-01 1995-03-02 Picker Nordstar Oy Polsko for a magnetographic imaging device
US20050258044A1 (en) * 2004-05-21 2005-11-24 Berman Michael J Magnetic focus rings for improved copper plating
US8113310B2 (en) * 2009-02-12 2012-02-14 General Atomics Linear motor charged electric vehicle
US8109353B2 (en) * 2009-04-02 2012-02-07 General Atomics Transport system incorporating linear motor charged electric vehicle

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3017544A (en) * 1954-03-19 1962-01-16 Varian Associates Magnet apparatus
US3018422A (en) * 1959-11-16 1962-01-23 Norman T Seaton Variable-field permanent magnet
US3182231A (en) * 1960-09-26 1965-05-04 Varian Associates Magnet pole cap construction

Also Published As

Publication number Publication date
DE1439896B2 (en) 1970-12-03
US3223897A (en) 1965-12-14
DE1439896A1 (en) 1970-12-03

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