DE3860837D1 - Magnetfeldgenerator. - Google Patents

Magnetfeldgenerator.

Info

Publication number
DE3860837D1
DE3860837D1 DE8888301127T DE3860837T DE3860837D1 DE 3860837 D1 DE3860837 D1 DE 3860837D1 DE 8888301127 T DE8888301127 T DE 8888301127T DE 3860837 T DE3860837 T DE 3860837T DE 3860837 D1 DE3860837 D1 DE 3860837D1
Authority
DE
Germany
Prior art keywords
magnetic field
field generator
generator
magnetic
field
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 - Fee Related
Application number
DE8888301127T
Other languages
English (en)
Inventor
Katsuhide Tanoshima
Yasuhiro Suzuki
Shizuo Nagata
Yasuo Shimizu
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.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry 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.)
Filing date
Publication date
Priority claimed from JP1987018893U external-priority patent/JPH0633523Y2/ja
Priority claimed from JP1987037126U external-priority patent/JPH0633524Y2/ja
Priority claimed from JP12718287A external-priority patent/JPS63292402A/ja
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Application granted granted Critical
Publication of DE3860837D1 publication Critical patent/DE3860837D1/de
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10532—Heads
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G11B11/10558—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position in view of the loading or unloading of the carrier
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/1055—Disposition or mounting of transducers relative to record carriers
    • G11B11/10556—Disposition or mounting of transducers relative to record carriers with provision for moving or switching or masking the transducers in or out of their operative position
    • G11B11/1056—Switching or mechanically reversing the magnetic field generator

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
DE8888301127T 1987-02-13 1988-02-11 Magnetfeldgenerator. Expired - Fee Related DE3860837D1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP1987018893U JPH0633523Y2 (ja) 1987-02-13 1987-02-13 外部磁界発生装置
JP1987037126U JPH0633524Y2 (ja) 1987-03-16 1987-03-16 外部磁界発生装置
JP12718287A JPS63292402A (ja) 1987-05-26 1987-05-26 外部磁界発生装置

Publications (1)

Publication Number Publication Date
DE3860837D1 true DE3860837D1 (de) 1990-11-29

Family

ID=27282403

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8888301127T Expired - Fee Related DE3860837D1 (de) 1987-02-13 1988-02-11 Magnetfeldgenerator.

Country Status (3)

Country Link
US (1) US4813007A (de)
EP (1) EP0278756B1 (de)
DE (1) DE3860837D1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5191525A (en) * 1990-01-16 1993-03-02 Digital Image Systems, Corporation System and method for extraction of data from documents for subsequent processing
JPH03250402A (ja) * 1990-02-28 1991-11-08 Canon Inc 磁気記録装置及びシステム
US6249200B1 (en) * 1998-04-10 2001-06-19 Dexter Magnetic Technologies, Inc. Combination of magnets for generating a uniform external magnetic field
US7050256B1 (en) * 2004-06-29 2006-05-23 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Fast erase method and apparatus for digital media

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6022406B2 (ja) * 1979-12-13 1985-06-01 富士通株式会社 垂直磁気記録再生用ヘッド
US4414554A (en) * 1980-07-21 1983-11-08 Ferix Corporation Magnetic imaging apparatus
JPS57113406A (en) * 1980-12-30 1982-07-14 Ricoh Co Ltd Vertical magnetic recording head
JPS61137201A (ja) * 1984-12-07 1986-06-24 Olympus Optical Co Ltd バイアス磁界印加装置
JPH069082B2 (ja) * 1985-02-14 1994-02-02 日本電気株式会社 磁界印加装置
JPS61192001A (ja) * 1985-02-20 1986-08-26 Fujitsu Ltd バイアス磁界発生装置
EP0485359B1 (de) * 1985-04-29 1998-06-17 Sony Corporation Externes Magnetfeld-Umpolungsgerät für magneto-optisches Plattengerät

Also Published As

Publication number Publication date
US4813007A (en) 1989-03-14
EP0278756A2 (de) 1988-08-17
EP0278756B1 (de) 1990-10-24
EP0278756A3 (en) 1989-05-31

Similar Documents

Publication Publication Date Title
DE3880202D1 (de) Magnetische vorrichtungen.
DE3875183D1 (de) Dauermagnete.
DE3688115D1 (de) Induktionsmagnetfeldgenerator.
DE3854177D1 (de) Planarspule.
DE3853507D1 (de) Ablenkmagnet.
IT1229835B (it) Complesso di fissaggio magnetico.
DE3776097D1 (de) Permanent magnetischer doppelgenerator.
DE3750351D1 (de) Magnetischer Toner.
DE58902810D1 (de) Spuelblock.
DE3879305D1 (de) Magnetkopf.
DE68912045D1 (de) Magnetische Einrichtung.
DE69010899D1 (de) Seismischer generator.
DE68916666D1 (de) Magnetischer Toner.
DE3781474D1 (de) Magnetfelderzeuger.
FI882054A (fi) Elektrisk dammsugare.
DE68912491D1 (de) Magnetlager.
DE3886569D1 (de) Magnetkopf.
DE3866043D1 (de) Felderzeugungsvorrichtung.
DE3879799D1 (de) Magnetkopf.
DE68908779D1 (de) Magnetscheider.
DE3885766D1 (de) Generatoranlage.
DE68912880D1 (de) Magnetkerne.
DE68911992D1 (de) Magnetfeldmessgerät.
DE3854317D1 (de) Magnetische Karte.
DE3781944D1 (de) Eingekapselter magnetischer toner.

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee