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
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)
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)
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)
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 |
EP0222916B1 (de) * | 1985-04-29 | 1993-02-03 | Sony Corporation | Externes magnetfeld-umpolungsgerät für fotomagnetische platten |
-
1988
- 1988-02-08 US US07/153,724 patent/US4813007A/en not_active Expired - Lifetime
- 1988-02-11 DE DE8888301127T patent/DE3860837D1/de not_active Expired - Fee Related
- 1988-02-11 EP EP88301127A patent/EP0278756B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0278756B1 (de) | 1990-10-24 |
EP0278756A2 (de) | 1988-08-17 |
US4813007A (en) | 1989-03-14 |
EP0278756A3 (en) | 1989-05-31 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |