CA1063239A - Magnetic bubble read head for record carrier - Google Patents

Magnetic bubble read head for record carrier

Info

Publication number
CA1063239A
CA1063239A CA220,709A CA220709A CA1063239A CA 1063239 A CA1063239 A CA 1063239A CA 220709 A CA220709 A CA 220709A CA 1063239 A CA1063239 A CA 1063239A
Authority
CA
Canada
Prior art keywords
sheet
domain
magnetic
record carrier
respect
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
CA220,709A
Other languages
English (en)
French (fr)
Other versions
CA220709S (en
Inventor
Frederik A. De Jonge
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 NL7402690A external-priority patent/NL7402690A/xx
Priority claimed from NL7402694A external-priority patent/NL7402694A/xx
Application filed by Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Application granted granted Critical
Publication of CA1063239A publication Critical patent/CA1063239A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00Diagnosis, testing or measuring for television systems or their details
    • H04N17/06Diagnosis, testing or measuring for television systems or their details for recorders
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00Recording 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/49Fixed mounting or arrangements, e.g. one head per track
    • G11B5/4907Details for scanning
    • G11B5/4915Structure of specially adapted heads
    • G11B5/4923Structure of specially adapted heads in which zones of the transducing part are being physically controllable
    • G11B5/493Control of magnetic properties, e.g. saturation, anisotropy
    • G11B5/4938Control of magnetic properties, e.g. saturation, anisotropy of thin magnetic films
    • G11B5/4946Control of magnetic properties, e.g. saturation, anisotropy of thin magnetic films for formation or displacement of magnetic domains, e.g. walls, bubbles
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/49Fixed mounting or arrangements, e.g. one head per track
    • G11B5/4969Details for track selection or addressing
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Magnetic Heads (AREA)
  • Magnetic Record Carriers (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
CA220,709A 1974-02-28 1975-02-25 Magnetic bubble read head for record carrier Expired CA1063239A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7402690A NL7402690A (en) 1974-02-28 1974-02-28 Storage and reproduction of data - using disc and platelet of magnetisable material with bubble generated in platelet
NL7402694A NL7402694A (nl) 1974-02-28 1974-02-28 Inrichting voor het opslaan en weergeven van informatie.

Publications (1)

Publication Number Publication Date
CA1063239A true CA1063239A (en) 1979-09-25

Family

ID=26644969

Family Applications (1)

Application Number Title Priority Date Filing Date
CA220,709A Expired CA1063239A (en) 1974-02-28 1975-02-25 Magnetic bubble read head for record carrier

Country Status (5)

Country Link
JP (1) JPS588050B2 (enrdf_load_stackoverflow)
CA (1) CA1063239A (enrdf_load_stackoverflow)
DE (1) DE2506426A1 (enrdf_load_stackoverflow)
FR (1) FR2262850B1 (enrdf_load_stackoverflow)
GB (1) GB1491963A (enrdf_load_stackoverflow)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2362844A1 (de) * 1973-01-10 1974-07-11 Philips Nv Vorrichtung zur magnetischen aufzeichnung mit einer magnetischen streifendomaene als eingabe/ausgabekopf

Also Published As

Publication number Publication date
GB1491963A (en) 1977-11-16
FR2262850B1 (enrdf_load_stackoverflow) 1980-03-28
DE2506426A1 (de) 1975-09-04
JPS50120812A (enrdf_load_stackoverflow) 1975-09-22
FR2262850A1 (enrdf_load_stackoverflow) 1975-09-26
JPS588050B2 (ja) 1983-02-14

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