GB2124033B - Permanent magnet - Google Patents

Permanent magnet

Info

Publication number
GB2124033B
GB2124033B GB08229706A GB8229706A GB2124033B GB 2124033 B GB2124033 B GB 2124033B GB 08229706 A GB08229706 A GB 08229706A GB 8229706 A GB8229706 A GB 8229706A GB 2124033 B GB2124033 B GB 2124033B
Authority
GB
United Kingdom
Prior art keywords
permanent magnet
permanent
magnet
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
GB08229706A
Other versions
GB2124033A (en
Inventor
George J Hoffman
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.)
Northrop Grumman Guidance and Electronics Co Inc
Original Assignee
Litton Systems 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 Litton Systems Inc filed Critical Litton Systems Inc
Publication of GB2124033A publication Critical patent/GB2124033A/en
Application granted granted Critical
Publication of GB2124033B publication Critical patent/GB2124033B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0273—Imparting anisotropy
    • H01F41/028—Radial anisotropy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/10—Construction relative to lubrication
    • F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
    • F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
    • F16C33/1035—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing by a magnetic field acting on a magnetic liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/74—Sealings of sliding-contact bearings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H01F7/0231—Magnetic circuits with PM for power or force generation
    • H01F7/0236—Magnetic suspension or levitation

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)
GB08229706A 1979-07-30 1982-10-18 Permanent magnet Expired GB2124033B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US6219779A 1979-07-30 1979-07-30

Publications (2)

Publication Number Publication Date
GB2124033A GB2124033A (en) 1984-02-08
GB2124033B true GB2124033B (en) 1984-08-01

Family

ID=22040823

Family Applications (2)

Application Number Title Priority Date Filing Date
GB8024332A Expired GB2058953B (en) 1979-07-30 1980-07-24 Magnetic fluid bearing
GB08229706A Expired GB2124033B (en) 1979-07-30 1982-10-18 Permanent magnet

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB8024332A Expired GB2058953B (en) 1979-07-30 1980-07-24 Magnetic fluid bearing

Country Status (7)

Country Link
JP (1) JPS5642722A (en)
CA (1) CA1149852A (en)
DE (1) DE3028454A1 (en)
FR (1) FR2467318A1 (en)
GB (2) GB2058953B (en)
IL (1) IL60597A0 (en)
IT (1) IT1128663B (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8602343A (en) * 1986-09-16 1988-04-18 Skf Ind Trading & Dev BEARING ASSEMBLY.
GB2222679B (en) * 1988-03-15 1991-10-16 Baroid Technology Inc Accelerometers
JPH04313748A (en) * 1991-01-23 1992-11-05 Konica Corp Photographic unit
JP2599459Y2 (en) * 1991-03-15 1999-09-06 エヌオーケー株式会社 Magnetic fluid bearing
ES2086711T3 (en) * 1991-07-11 1996-07-01 Laube Hans Juergen MAGNETIC BODY COMPOSED OF SEVERAL INDIVIDUAL MAGNETIC BODIES AND PERMANENT MAGNETIC LEVITATION BEARING WITH A GLOBAL MAGNETIC BODY COMPOSED OF SEVERAL INDIVIDUAL MAGNETS.
JPH0728599U (en) * 1993-11-09 1995-05-30 株式会社プラスパ Small chip stacking craft and chip materials
DE10244495A1 (en) * 2002-09-25 2004-04-08 Saurer Gmbh & Co. Kg Textile machine with a variety of jobs
DK1772039T3 (en) * 2004-06-03 2012-05-29 Tymphany Hk Ltd Acoustic transducer comprising several coaxially located membranes
US9462388B2 (en) 2004-06-03 2016-10-04 Tymphany Hk Limited Acoustic transducer comprising a plurality of coaxially arranged diaphragms
DE202005005904U1 (en) * 2005-04-07 2006-08-17 Ebm-Papst St. Georgen Gmbh & Co. Kg Bearing arrangement for bearing of swiveling shaft has swiveling shaft of hard ferromagnetic material, which has a permanent magnetic field whereby plain bearing serves as return for magnetic field lines of permanent magnetic field

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1052192B (en) * 1956-07-14 1959-03-05 Philips Nv Sealing for a shaft duct through the wall of a space containing fine iron particles
GB842531A (en) * 1958-12-24 1960-07-27 Mullard Ltd Permanent magnets
DE2034213C3 (en) * 1969-10-10 1985-04-25 Ferrofluidics Corp., Burlington, Mass. Magnetic seal for sealing sealing gaps
US3620584A (en) * 1970-05-25 1971-11-16 Ferrofluidics Corp Magnetic fluid seals
US3746407A (en) * 1971-08-13 1973-07-17 Litton Systems Inc Ferrohydrodynamic low friction bearing
US3726574A (en) * 1971-08-13 1973-04-10 Litton Systems Inc Ferrohydrodynamic low-friction bearing with volume compensation
GB1413118A (en) * 1972-12-08 1975-11-05 Godsill J K Lubrication
DE2213465C3 (en) * 1972-03-20 1986-02-13 Padana AG, Zug Electromagnetic bearing element
USRE27955E (en) * 1972-05-19 1974-04-02 Bearing arrangement with magnetic fluid defining bearing pads
DE2245039B2 (en) * 1972-09-14 1976-01-02 Daimler-Benz Ag, 7000 Stuttgart bearings
US3918773A (en) * 1974-01-07 1975-11-11 Litton Systems Inc Magnetic field responsive hydrodynamic bearing
DE2420825C3 (en) * 1974-04-30 1980-04-17 Padana Ag, Zug (Schweiz) Magnetic bearing of a rotor
US4065188A (en) * 1975-02-10 1977-12-27 Strathearn Audio Limited Linear bearing for parallel tracking arm
US4043612A (en) * 1975-06-06 1977-08-23 Ampex Corporation Bearing structure

Also Published As

Publication number Publication date
FR2467318A1 (en) 1981-04-17
GB2058953A (en) 1981-04-15
IL60597A0 (en) 1980-09-16
IT1128663B (en) 1986-06-04
FR2467318B1 (en) 1984-08-10
GB2124033A (en) 1984-02-08
GB2058953B (en) 1983-05-05
CA1149852A (en) 1983-07-12
IT8049355A0 (en) 1980-07-28
JPS5642722A (en) 1981-04-21
DE3028454A1 (en) 1981-02-19

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee