GB1491963A - Playback device - Google Patents

Playback device

Info

Publication number
GB1491963A
GB1491963A GB779575A GB779575A GB1491963A GB 1491963 A GB1491963 A GB 1491963A GB 779575 A GB779575 A GB 779575A GB 779575 A GB779575 A GB 779575A GB 1491963 A GB1491963 A GB 1491963A
Authority
GB
United Kingdom
Prior art keywords
feb
variations
magnetic
plate
bubble
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
GB779575A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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 NL7402694A external-priority patent/NL7402694A/en
Priority claimed from NL7402690A external-priority patent/NL7402690A/en
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1491963A publication Critical patent/GB1491963A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/06—Diagnosis, testing or measuring for television systems or their details for recorders
    • 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition 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
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition 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
    • G11B5/49—Fixed mounting or arrangements, e.g. one head per track
    • G11B5/4907—Details for scanning
    • G11B5/4915—Structure of specially adapted heads
    • G11B5/4923—Structure of specially adapted heads in which zones of the transducing part are being physically controllable
    • G11B5/493—Control of magnetic properties, e.g. saturation, anisotropy
    • G11B5/4938—Control of magnetic properties, e.g. saturation, anisotropy of thin magnetic films
    • G11B5/4946—Control of magnetic properties, e.g. saturation, anisotropy of thin magnetic films for formation or displacement of magnetic domains, e.g. walls, bubbles
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition 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
    • G11B5/49—Fixed mounting or arrangements, e.g. one head per track
    • G11B5/4969—Details for track selection or addressing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition 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
    • G11B5/58—Disposition 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 Record Carriers (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Magnetic Heads (AREA)

Abstract

1491963 Magnetic playback heads PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 25 Feb 1975 [28 Feb 1974 (2)] 7795/75 Heading G5R [Also in Division H3] A plate 1 of magnetizable material contains a magnetic bubble 2 which varies in size according to variations in the magnetic field of a record 9. As shown, two magnetoresistive elements 5, 5<SP>1</SP> on the plate 1 detect the variations in size of the bubble 2 which is movable along a groove 6 by means of adjustments in the currents flowing through two conductors 3, 3<SP>1</SP>. The recording may take the form of deformations in a magnetized surface.
GB779575A 1974-02-28 1975-02-25 Playback device Expired GB1491963A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7402694A NL7402694A (en) 1974-02-28 1974-02-28 DEVICE FOR STORING AND DISPLAYING INFORMATION.
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

Publications (1)

Publication Number Publication Date
GB1491963A true GB1491963A (en) 1977-11-16

Family

ID=26644969

Family Applications (1)

Application Number Title Priority Date Filing Date
GB779575A Expired GB1491963A (en) 1974-02-28 1975-02-25 Playback device

Country Status (5)

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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2362844A1 (en) * 1973-01-10 1974-07-11 Philips Nv DEVICE FOR MAGNETIC RECORDING WITH A MAGNETIC STRIP DOMAEN AS INPUT / OUTPUT HEAD

Also Published As

Publication number Publication date
DE2506426A1 (en) 1975-09-04
JPS588050B2 (en) 1983-02-14
CA1063239A (en) 1979-09-25
JPS50120812A (en) 1975-09-22
FR2262850A1 (en) 1975-09-26
FR2262850B1 (en) 1980-03-28

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee