GB2124033B - Permanent magnet - Google Patents

Permanent magnet

Info

Publication number: GB2124033B
Authority: GB; United Kingdom
Prior art keywords: permanent magnet; permanent; magnet
Prior art date: 1979-07-30
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.)

1979-07-30

Filing date

1982-10-18

Publication date

1984-08-01

1982-10-18 Application filed by Litton Systems Inc filed Critical Litton Systems Inc

1984-02-08 Publication of GB2124033A publication Critical patent/GB2124033A/en

1984-08-01 Application granted granted Critical

1984-08-01 Publication of GB2124033B publication Critical patent/GB2124033B/en

Status Expired legal-status Critical Current

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
ATE134793T1 (en) *	1991-07-11	1996-03-15	Laube Hans Juergen	MAGNETIC BODY COMPOSED OF SEVERAL INDIVIDUAL MAGNETIC BODY AND A PERMANENT MAGNETIC FLOATING BEARING WITH A TOTAL 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
ATE548859T1 (en) *	2004-06-03	2012-03-15	Tymphany Hk Ltd	ACOUSTIC TRANSDUCER HAVING A PLURALITY OF MEMBRANES ARRANGED ON THE SAME AXIS
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
US3726574A (en) *	1971-08-13	1973-04-10	Litton Systems Inc	Ferrohydrodynamic low-friction bearing with volume compensation
US3746407A (en) *	1971-08-13	1973-07-17	Litton Systems Inc	Ferrohydrodynamic low friction bearing
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

1980
- 1980-07-15 IL IL60597A patent/IL60597A0/en unknown
- 1980-07-16 CA CA000356348A patent/CA1149852A/en not_active Expired
- 1980-07-24 GB GB8024332A patent/GB2058953B/en not_active Expired
- 1980-07-26 DE DE19803028454 patent/DE3028454A1/en not_active Withdrawn
- 1980-07-28 IT IT49355/80A patent/IT1128663B/en active
- 1980-07-29 FR FR8016694A patent/FR2467318A1/en active Granted
- 1980-07-30 JP JP10376080A patent/JPS5642722A/en active Pending
1982
- 1982-10-18 GB GB08229706A patent/GB2124033B/en not_active Expired

Also Published As

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

Publication	Publication Date	Title
US4453294B1 (en)	1991-05-28	Engageable article using permanent magnet
GB2046528B (en)	1983-05-11	Permanent magnets
GB2039151B (en)	1983-01-19	Matrix-bonded permanent magnets
GB8306781D0 (en)	1983-04-20	Permanent magnet
JPS56130905A (en)	1981-10-14	Magnet
GB2021147B (en)	1982-06-03	Permanent magnet materials
DE3063740D1 (en)	1983-07-21	Magnetic head-mounting-assemblies
GB2124033B (en)	1984-08-01	Permanent magnet
IL55954A (en)	1982-08-31	Permanent magnet assembly
GB2018524B (en)	1983-03-16	Permanent magnet generator
JPS5615153A (en)	1981-02-13	Permanent magnet generator
DE3269965D1 (en)	1986-04-24	Permanent magnet
GB2025460B (en)	1983-02-02	Fe-cr-co permanent magnet alloy
DE3268714D1 (en)	1986-03-06	Permanent magnets
JPS55130862A (en)	1980-10-11	Oxide permanent magnet
JPS5595464A (en)	1980-07-19	Magnetic device
JPS55130107A (en)	1980-10-08	Magnetic structure
GB2012114B (en)	1982-05-06	Load-carrying permanent magnet
JPS563185A (en)	1981-01-13	Magnet driver
JPS53116497A (en)	1978-10-11	Presssformed magnet
JPS5411498A (en)	1979-01-27	Composition for permanent magnet
JPS5319508A (en)	1978-02-22	Permanent magnet morot
JPS5488828A (en)	1979-07-14	Permanent magnet material
AU2731077A (en)	1979-02-01	Permanent magnet perpetual-motion machine
JPS54161526A (en)	1979-12-21	Permanent magnet alloy

Legal Events

Date	Code	Title	Description
1987-03-18	PCNP	Patent ceased through non-payment of renewal fee