EP0106948A3 - Magnetic materials and permanent magnets - Google Patents

Magnetic materials and permanent magnets Download PDF

Info

Publication number: EP0106948A3
Authority: EP; European Patent Office
Prior art keywords: permanent magnets; magnetic materials; magnetic; materials; magnets
Prior art date: 1982-09-27
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.): Granted

Application number

EP83107351A

Other versions

EP0106948B1 (en

EP0106948A2 (en

Inventor

Masato Sagawa

Yutaka Matsuura

Setsuo Hanazonodanchi 14-106 Fujimura

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.)

Neomax Co Ltd

Original Assignee

Sumitomo Special Metals Co Ltd

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.)

1982-09-27

Filing date

1983-07-26

Publication date

1985-03-13

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27563323&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0106948(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1982-09-27 Priority claimed from JP57166663A external-priority patent/JPS5964733A/en

1983-01-19 Priority claimed from JP58005813A external-priority patent/JPS59132104A/en

1983-03-08 Priority claimed from JP58037897A external-priority patent/JPS59163803A/en

1983-03-08 Priority claimed from JP58037899A external-priority patent/JPS59163805A/en

1983-05-14 Priority claimed from JP58084858A external-priority patent/JPS59211551A/en

1983-05-14 Priority claimed from JP58084860A external-priority patent/JPS59211559A/en

1983-05-31 Priority claimed from JP58094876A external-priority patent/JPH0778269B2/en

1983-07-26 Application filed by Sumitomo Special Metals Co Ltd filed Critical Sumitomo Special Metals Co Ltd

1984-05-02 Publication of EP0106948A2 publication Critical patent/EP0106948A2/en

1985-03-13 Publication of EP0106948A3 publication Critical patent/EP0106948A3/en

1989-01-25 Publication of EP0106948B1 publication Critical patent/EP0106948B1/en

1989-01-25 Application granted granted Critical

Status Expired legal-status Critical Current

Links

Classifications

- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0433—Nickel- or cobalt-based alloys
- C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B

EP83107351A 1982-09-27 1983-07-26 Permanently magnetizable alloys, magnetic materials and permanent magnets comprising febr or (fe,co)br (r=vave earth) Expired EP0106948B1 (en)

Applications Claiming Priority (14)

Application Number	Priority Date	Filing Date	Title
JP166663/82		1982-09-27
JP57166663A JPS5964733A (en)	1982-09-27	1982-09-27	Permanent magnet
JP58005813A JPS59132104A (en)	1983-01-19	1983-01-19	Permanent magnet
JP5813/83		1983-01-19
JP37899/83		1983-03-08
JP58037899A JPS59163805A (en)	1983-03-08	1983-03-08	Permanent magnet
JP37897/83		1983-03-08
JP58037897A JPS59163803A (en)	1983-03-08	1983-03-08	Permanent magnet
JP84860/83		1983-05-14
JP58084858A JPS59211551A (en)	1983-05-14	1983-05-14	Permanent magnet material
JP84858/83		1983-05-14
JP58084860A JPS59211559A (en)	1983-05-14	1983-05-14	Permanent magnet material
JP58094876A JPH0778269B2 (en)	1983-05-31	1983-05-31	Rare earth / iron / boron tetragonal compound for permanent magnet
JP94876/83		1983-05-31

Publications (3)

Publication Number	Publication Date
EP0106948A2 EP0106948A2 (en)	1984-05-02
EP0106948A3 true EP0106948A3 (en)	1985-03-13
EP0106948B1 EP0106948B1 (en)	1989-01-25

Family

ID=27563323

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP83107351A Expired EP0106948B1 (en)	1982-09-27	1983-07-26	Permanently magnetizable alloys, magnetic materials and permanent magnets comprising febr or (fe,co)br (r=vave earth)

Country Status (5)

Country	Link
EP (1)	EP0106948B1 (en)
CA (1)	CA1315571C (en)
DE (1)	DE3379084D1 (en)
HK (1)	HK68490A (en)
SG (1)	SG48390G (en)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA1316375C (en) *	1982-08-21	1993-04-20	Masato Sagawa	Magnetic materials and permanent magnets
US4792368A (en) *	1982-08-21	1988-12-20	Sumitomo Special Metals Co., Ltd.	Magnetic materials and permanent magnets
US4840684A (en) *	1983-05-06	1989-06-20	Sumitomo Special Metals Co, Ltd.	Isotropic permanent magnets and process for producing same
EP0125347B1 (en) *	1983-05-06	1990-04-18	Sumitomo Special Metals Co., Ltd.	Isotropic magnets and process for producing same
JPS6032306A (en) *	1983-08-02	1985-02-19	Sumitomo Special Metals Co Ltd	Permanent magnet
JPS6034005A (en) *	1983-08-04	1985-02-21	Sumitomo Special Metals Co Ltd	Permanent magnet
EP0144112B1 (en) *	1983-10-26	1989-09-27	General Motors Corporation	High energy product rare earth-transition metal magnet alloys containing boron
DE3575231D1 (en) *	1984-02-28	1990-02-08	Sumitomo Spec Metals	METHOD FOR PRODUCING PERMANENT MAGNETS.
EP0338597B1 (en) *	1984-02-28	1995-01-11	Sumitomo Special Metals Co., Ltd.	Permanent magnets
US5529854A (en) *	1984-09-12	1996-06-25	Seiko Epson Corporation	Magneto-optic recording systems
US5100741A (en) *	1984-09-12	1992-03-31	Seiko Epson Corporation	Magneto-optic recording systems
DE3577618D1 (en) *	1984-09-14	1990-06-13	Toshiba Kawasaki Kk	PERMANENT MAGNETIC ALLOY AND METHOD FOR THEIR PRODUCTION.
US4767450A (en) *	1984-11-27	1988-08-30	Sumitomo Special Metals Co., Ltd.	Process for producing the rare earth alloy powders
US4765848A (en) *	1984-12-31	1988-08-23	Kaneo Mohri	Permanent magnent and method for producing same
USRE34838E (en) *	1984-12-31	1995-01-31	Tdk Corporation	Permanent magnet and method for producing same
NL8500534A (en) *	1985-02-26	1986-09-16	Philips Nv	MAGNETIC MATERIAL CONTAINING AN INTERMETALLIC CONNECTION OF THE RARE EARTH TRANSITION METAL TYPE.
JPH0789521B2 (en) *	1985-03-28	1995-09-27	株式会社東芝	Rare earth iron permanent magnet
US4588439A (en) *	1985-05-20	1986-05-13	Crucible Materials Corporation	Oxygen containing permanent magnet alloy
US4762574A (en) *	1985-06-14	1988-08-09	Union Oil Company Of California	Rare earth-iron-boron premanent magnets
US4952252A (en) *	1985-06-14	1990-08-28	Union Oil Company Of California	Rare earth-iron-boron-permanent magnets
US4933009A (en) *	1985-06-14	1990-06-12	Union Oil Company Of California	Composition for preparing rare earth-iron-boron-permanent magnets
US6136099A (en) *	1985-08-13	2000-10-24	Seiko Epson Corporation	Rare earth-iron series permanent magnets and method of preparation
US5538565A (en) *	1985-08-13	1996-07-23	Seiko Epson Corporation	Rare earth cast alloy permanent magnets and methods of preparation
FR2586323B1 (en) *	1985-08-13	1992-11-13	Seiko Epson Corp	RARE EARTH-IRON PERMANENT MAGNET
EP0216254B1 (en) *	1985-09-10	1991-01-02	Kabushiki Kaisha Toshiba	Permanent magnet
JPS62165305A (en) *	1986-01-16	1987-07-21	Hitachi Metals Ltd	Permanent magnet of good thermal stability and manufacture thereof
US4769063A (en) *	1986-03-06	1988-09-06	Sumitomo Special Metals Co., Ltd.	Method for producing rare earth alloy
JPH07105289B2 (en) *	1986-03-06	1995-11-13	信越化学工業株式会社	Rare earth permanent magnet manufacturing method
JP2530641B2 (en) *	1986-03-20	1996-09-04	日立金属株式会社	Magnetically anisotropic bonded magnet, magnetic powder used therefor, and method for producing the same
US4747874A (en) *	1986-05-30	1988-05-31	Union Oil Company Of California	Rare earth-iron-boron permanent magnets with enhanced coercivity
US4878958A (en) *	1986-05-30	1989-11-07	Union Oil Company Of California	Method for preparing rare earth-iron-boron permanent magnets
US4954186A (en) *	1986-05-30	1990-09-04	Union Oil Company Of California	Rear earth-iron-boron permanent magnets containing aluminum
DE3786426T2 (en) *	1986-06-12	1993-12-09	Toshiba Kawasaki Kk	Permanent magnet and permanent magnet alloy.
US5041171A (en) *	1986-07-18	1991-08-20	U.S. Philips Corporation	Hard magnetic material
EP0261579B1 (en) *	1986-09-16	1993-01-07	Tokin Corporation	A method for producing a rare earth metal-iron-boron permanent magnet by use of a rapidly-quenched alloy powder
US4983232A (en) *	1987-01-06	1991-01-08	Hitachi Metals, Ltd.	Anisotropic magnetic powder and magnet thereof and method of producing same
KR900006533B1 (en) *	1987-01-06	1990-09-07	히다찌 긴조꾸 가부시끼가이샤	Anisotropic magnetic materials and magnets made with it and making method for it
US4902360A (en) *	1987-02-04	1990-02-20	Crucible Materials Corporation	Permanent magnet alloy for elevated temperature applications
US4942098A (en) *	1987-03-26	1990-07-17	Sumitomo Special Metals, Co., Ltd.	Corrosion resistant permanent magnet
GB8707905D0 (en) *	1987-04-02	1987-05-07	Univ Birmingham	Magnets
KR880013194A (en) *	1987-04-06	1988-11-30	원본미기재	Permanent magnet and its manufacturing method
US5460662A (en) *	1987-04-30	1995-10-24	Seiko Epson Corporation	Permanent magnet and method of production
US5186761A (en) *	1987-04-30	1993-02-16	Seiko Epson Corporation	Magnetic alloy and method of production
ATE109921T1 (en) *	1987-04-30	1994-08-15	Seiko Epson Corp	PERMANENT MAGNET AND ITS MANUFACTURING PROCESS.
US5015304A (en) *	1987-05-11	1991-05-14	Union Oil Company Of California	Rare earth-iron-boron sintered magnets
US5022939A (en) *	1987-07-30	1991-06-11	Tdk Corporation	Permanent magnets
JPH01103805A (en) *	1987-07-30	1989-04-20	Tdk Corp	Permanent magnet
JPS6472502A (en) *	1987-09-11	1989-03-17	Hitachi Metals Ltd	Permanent magnet for accelerating particle beam
EP0386286B1 (en) *	1987-09-17	1995-10-18	Shin-Etsu Chemical Co., Ltd.	Rare earth iron-based permanent magnet
US5000796A (en) *	1988-02-23	1991-03-19	Eastman Kodak Company	Anisotropic high energy magnets and a process of preparing the same
US4892596A (en) *	1988-02-23	1990-01-09	Eastman Kodak Company	Method of making fully dense anisotropic high energy magnets
US4985085A (en) *	1988-02-23	1991-01-15	Eastman Kodak Company	Method of making anisotropic magnets
JP2741508B2 (en) *	1988-02-29	1998-04-22	住友特殊金属株式会社	Magnetic anisotropic sintered magnet and method of manufacturing the same
US5000800A (en) *	1988-06-03	1991-03-19	Masato Sagawa	Permanent magnet and method for producing the same
JPH0283905A (en) *	1988-09-20	1990-03-26	Sumitomo Special Metals Co Ltd	Corrosion-resistant permanent magnet and manufacture thereof
JP2843379B2 (en) *	1988-10-04	1999-01-06	日立金属株式会社	Isotropic heat-resistant bonded magnet, method of manufacturing the same, magnetic powder using the same, and PM-type motor using the same
DE3928389A1 (en) *	1989-08-28	1991-03-14	Schramberg Magnetfab	PERMANENT MAGNET
JPH0391205A (en) *	1989-09-01	1991-04-16	Matsushita Electric Ind Co Ltd	Anisotropic permanent magnet
US5201963A (en) *	1989-10-26	1993-04-13	Nippon Steel Corporation	Rare earth magnets and method of producing same
WO1992002027A1 (en) *	1990-07-16	1992-02-06	Nauchno-Proizvodstvennoe Obiedinenie 'vsesojuzny Institut Aviatsionnykh Materialov'	Magnetic material
US5478411A (en) *	1990-12-21	1995-12-26	Provost, Fellows And Scholars Of The College Of The Holy And Undivided Trinity Of Queen Elizabeth Near Dublin	Magnetic materials and processes for their production
DE69916764T2 (en)	1998-12-15	2005-03-31	Shin-Etsu Chemical Co., Ltd.	Rare earth / iron / boron based alloy for permanent magnet
US6833036B2 (en) *	2001-06-29	2004-12-21	Tdk Corporation	Rare earth permanent magnet
US6955729B2 (en) *	2002-04-09	2005-10-18	Aichi Steel Corporation	Alloy for bonded magnets, isotropic magnet powder and anisotropic magnet powder and their production method, and bonded magnet
CN1934283B (en)	2004-06-22	2011-07-27	信越化学工业株式会社	R-Fe-B-based rare earth permanent magnet material
CN103668007B (en) *	2013-12-19	2015-08-19	南京信息工程大学	One has high saturated magnetic induction microcrystallizing alloy strip and preparation method

Family Cites Families (6)

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Publication number	Priority date	Publication date	Assignee	Title
JPS5250598A (en) *	1975-10-20	1977-04-22	Seiko Instr & Electronics Ltd	Rare earth-cobalt magnet
JPS55132004A (en) *	1979-04-02	1980-10-14	Seiko Instr & Electronics Ltd	Manufacture of rare earth metal and cobalt magnet
JPS5647538A (en) *	1979-09-27	1981-04-30	Hitachi Metals Ltd	Alloy for permanent magnet
JPS57141901A (en) *	1981-02-26	1982-09-02	Mitsubishi Steel Mfg Co Ltd	Permanent magnet powder
CA1316375C (en) *	1982-08-21	1993-04-20	Masato Sagawa	Magnetic materials and permanent magnets
DE3379131D1 (en) *	1982-09-03	1989-03-09	Gen Motors Corp	Re-tm-b alloys, method for their production and permanent magnets containing such alloys

1983
- 1983-07-26 CA CA000433188A patent/CA1315571C/en not_active Expired - Lifetime
- 1983-07-26 DE DE8383107351T patent/DE3379084D1/en not_active Expired
- 1983-07-26 EP EP83107351A patent/EP0106948B1/en not_active Expired
1990
- 1990-07-02 SG SG48390A patent/SG48390G/en unknown
- 1990-08-30 HK HK68490A patent/HK68490A/en not_active IP Right Cessation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENTS ABSTRACTS OF JAPAN, vol. 4, no. 189(E-39)(671), 25th December 1980; & JP-A-55 132 004 (DAINI SEIKOSHA K.K.) 14-10-1980 *

Also Published As

Publication number	Publication date
EP0106948B1 (en)	1989-01-25
DE3379084D1 (en)	1989-03-02
EP0106948A2 (en)	1984-05-02
CA1315571C (en)	1993-04-06
HK68490A (en)	1990-09-07
SG48390G (en)	1991-02-14

Legal Events

Date	Code	Title	Description
1984-03-03	PUAI	Public reference made under article 153(3) epc to a published international application that has entered the european phase	Free format text: ORIGINAL CODE: 0009012
1984-05-02	AK	Designated contracting states	Designated state(s): BE CH DE FR GB IT LI NL SE
1984-09-05	17P	Request for examination filed	Effective date: 19840626
1985-01-11	PUAL	Search report despatched	Free format text: ORIGINAL CODE: 0009013
1985-03-13	AK	Designated contracting states	Designated state(s): BE CH DE FR GB IT LI NL SE
1986-09-10	17Q	First examination report despatched	Effective date: 19860725
1987-03-25	R17C	First examination report despatched (corrected)	Effective date: 19870206
1988-07-06	ITF	It: translation for a ep patent filed	Owner name: DE DOMINICIS & MAYER S.R.L.
1988-12-10	GRAA	(expected) grant	Free format text: ORIGINAL CODE: 0009210
1989-01-25	AK	Designated contracting states	Kind code of ref document: B1 Designated state(s): BE CH DE FR GB IT LI NL SE
1989-03-02	REF	Corresponds to:	Ref document number: 3379084 Country of ref document: DE Date of ref document: 19890302
1989-06-02	ET	Fr: translation filed
1989-10-25	RAP2	Party data changed (patent owner data changed or rights of a patent transferred)	Owner name: SUMITOMO SPECIAL METALS CO., LTD.
1989-11-02	PLBI	Opposition filed	Free format text: ORIGINAL CODE: 0009260
1989-12-20	26	Opposition filed	Opponent name: GFE GESELLSCHAFT FUER ELEKTROMETALLURGIE MBH Effective date: 19891025 Opponent name: MAGNETFABRIK SCHRAMBERG GMBH & CO. Effective date: 19891024 Opponent name: TREIBACHER CHEMISCHE WERKE AG Effective date: 19891023
1990-03-01	NLR1	Nl: opposition has been filed with the epo	Opponent name: GFE GESELLSCHAFT FUER ELEKTROMETALLURGIE MBH. Opponent name: MAGNETFABRIK SCHRAMBERG GMBH & CO. Opponent name: TREIBACHER CHEMISCHE WERKE AG.
1991-07-31	ITTA	It: last paid annual fee
1992-10-27	PLBN	Opposition rejected	Free format text: ORIGINAL CODE: 0009273
1992-10-27	STAA	Information on the status of an ep patent application or granted ep patent	Free format text: STATUS: OPPOSITION REJECTED
1992-12-16	27O	Opposition rejected	Effective date: 19920629
1993-02-16	NLR2	Nl: decision of opposition
1995-01-31	EAL	Se: european patent in force in sweden	Ref document number: 83107351.5
2002-01-01	REG	Reference to a national code	Ref country code: GB Ref legal event code: IF02
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2003-09-02	EUG	Se: european patent has lapsed
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Publication	Publication Date	Title
EP0101552A3 (en)	1985-03-20	Magnetic materials and permanent magnets
EP0106948A3 (en)	1985-03-13	Magnetic materials and permanent magnets
DE3378705D1 (en)	1989-01-19	Permanent magnet
DE3372424D1 (en)	1987-08-13	Permanent magnets
DE3472511D1 (en)	1988-08-04	Permanent magnet field rotor
GB8307188D0 (en)	1983-04-20	Permanent magnet rotor
GB2046528B (en)	1983-05-11	Permanent magnets
GB2128812B (en)	1986-06-18	Permanent magnet multipole with adjustable strength
GB2149976B (en)	1986-11-19	Permanent magnet rotor
GB8306781D0 (en)	1983-04-20	Permanent magnet
DE3472495D1 (en)	1988-08-04	Ion source ferromagnetic structure formed by permanent magnets and solenoids
GB2039151B (en)	1983-01-19	Matrix-bonded permanent magnets
EP0248981A3 (en)	1989-04-12	Permanent magnet and permanent magnetic alloy
DE3374636D1 (en)	1987-12-23	Permanent magnet type motor
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GB2130797B (en)	1986-07-30	Switchable permanent magnetic chuck
GB8319678D0 (en)	1983-08-24	Magnet assemblies
GB2121238B (en)	1986-01-29	Switchable permanent magnetic holding device
GB2124033B (en)	1984-08-01	Permanent magnet
GB8318426D0 (en)	1983-08-10	Magnetron magnet
DE3365189D1 (en)	1986-09-18	Thin-film permanent magnet
DE3269965D1 (en)	1986-04-24	Permanent magnet
DE3268714D1 (en)	1986-03-06	Permanent magnets
DE3361907D1 (en)	1986-03-06	Switch with rotating arc and permanent magnet
GB8301525D0 (en)	1983-02-23	Uniform field solenoid magnet