FR1468978A - Système de mise en position pour dispositif à accès sélectif - Google Patents

Système de mise en position pour dispositif à accès sélectif

Info

Publication number
FR1468978A
FR1468978A FR40772A FR40772A FR1468978A FR 1468978 A FR1468978 A FR 1468978A FR 40772 A FR40772 A FR 40772A FR 40772 A FR40772 A FR 40772A FR 1468978 A FR1468978 A FR 1468978A
Authority
FR
France
Prior art keywords
positioning system
access device
selective access
selective
positioning
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
FR40772A
Other languages
English (en)
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of FR1468978A publication Critical patent/FR1468978A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/10—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following
    • G11B21/106—Track finding or aligning by moving the head ; Provisions for maintaining alignment of the head relative to the track during transducing operation, i.e. track following on disks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/22—Analogue/digital converters pattern-reading type

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Moving Of The Head To Find And Align With The Track (AREA)
  • Control Of Position Or Direction (AREA)
FR40772A 1964-12-21 1965-12-03 Système de mise en position pour dispositif à accès sélectif Expired FR1468978A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42000964A 1964-12-21 1964-12-21

Publications (1)

Publication Number Publication Date
FR1468978A true FR1468978A (fr) 1967-02-10

Family

ID=23664692

Family Applications (1)

Application Number Title Priority Date Filing Date
FR40772A Expired FR1468978A (fr) 1964-12-21 1965-12-03 Système de mise en position pour dispositif à accès sélectif

Country Status (4)

Country Link
US (1) US3426337A (fr)
DE (1) DE1513215A1 (fr)
FR (1) FR1468978A (fr)
GB (1) GB1070680A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315142A1 (fr) * 1975-06-17 1977-01-14 Pyral Soc Procede de guidage d'une tete d'enregistrement et/ou de lecture d'un support magnetique

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530447A (en) * 1966-12-02 1970-09-22 Digital Equipment Corp Transducer positioning indexer in magnetic disc recorder
US3906326A (en) * 1970-06-03 1975-09-16 Caelus Memories Inc Fine and coarse track positioning system for a transducer in a magnetic recording system
DE2043766A1 (de) * 1970-09-03 1972-03-09 Siemens Ag Verfahren und Anordnung zum Speichern von Informationen in einem magnetooptischen Speicher
US3772662A (en) * 1971-12-30 1973-11-13 Texas Instruments Inc Write ring detector for magnetic recorders
US3839664A (en) * 1972-02-10 1974-10-01 Dirks Electronics Corp Magnetic disc head linear motor positioning system
US3919697A (en) * 1974-06-26 1975-11-11 Battelle Development Corp Data record tracking using track identifying information in the gaps between recorded data groups
US4982296A (en) * 1980-09-24 1991-01-01 Quantum Corporation Head and disk assembly for fixed disk drive
US4920434A (en) * 1980-09-24 1990-04-24 Quantum Corporation Fixed disk drive
US4587579A (en) * 1982-12-30 1986-05-06 International Business Machines Corporation System for position detection on a rotating disk
JPS59213074A (ja) * 1983-05-16 1984-12-01 インタ−ナシヨナル・ビジネス・マシ−ンズ・コ−ポレ−シヨン 磁気記録媒体
US4558383A (en) * 1983-06-30 1985-12-10 International Business Machines Corporation Information storage disk transducer position control system using a prerecorded servo pattern requiring no alignment with the storage disk
US4613916A (en) * 1983-12-30 1986-09-23 International Business Machines Corporation Information storage disk transducer position control system requiring no servo pattern on the storage disk
US5003412A (en) * 1987-10-30 1991-03-26 Brier Technology, Inc. Method and apparatus for positioning a read/write mechanism
US6057976A (en) * 1994-04-28 2000-05-02 Canon Kabushiki Kaisha Apparatus for detecting rotational displacement information of a rotating object
US6084740A (en) 1997-12-01 2000-07-04 Storage Technology Corporation Optical servo system for a tape drive
US7029726B1 (en) 1999-07-27 2006-04-18 Quantum Corporation Method for forming a servo pattern on a magnetic tape
US7153366B1 (en) 1998-03-24 2006-12-26 Quantum Corporation Systems and method for forming a servo pattern on a magnetic tape
DE19913382C2 (de) 1998-03-24 2002-08-14 Quantum Corp Mehrkanaliges Magnetbandsystem mit einem optischen Spur-Servo
US6275349B1 (en) * 1998-12-02 2001-08-14 Storage Technology Corporation Integrated optical tracking system for magnetic media
WO2000049604A1 (fr) 1999-02-16 2000-08-24 Quantum Corporation Procede d'ecriture de signaux d'asservissement sur une bande magnetique
WO2000049605A1 (fr) 1999-02-17 2000-08-24 Quantum Corporation Procede d'ecriture de signaux d'asservissement sur une bande magnetique
US6961200B2 (en) * 1999-07-27 2005-11-01 Quantum Corporation Optical servo track identification on tape storage media
US20030189782A1 (en) * 2002-04-04 2003-10-09 Storage Technology Corporation Optical servo system for a tape drive
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape
US6940676B1 (en) 2000-06-07 2005-09-06 Quantum Corporation Triple push-pull optical tracking system
US6791784B2 (en) * 2001-03-23 2004-09-14 Imation Corp. Diffraction-based monitoring of a patterned magnetic recording medium
US6940681B2 (en) 2001-08-20 2005-09-06 Quantum Corporation Optical to magnetic alignment in magnetic tape system
US7023650B2 (en) 2001-11-07 2006-04-04 Quantum Corporation Optical sensor to recording head alignment
US20040141445A1 (en) * 2003-01-17 2004-07-22 Hanks Darwin Mitchel Radial position registration for a trackless optical disc surface
US7219840B2 (en) * 2003-01-17 2007-05-22 Hewlett-Packard Development Company, L.P. Calibrating fine actuator using a reference pattern
US6980390B2 (en) * 2003-02-05 2005-12-27 Quantum Corporation Magnetic media with embedded optical servo tracks
US7187515B2 (en) * 2003-02-05 2007-03-06 Quantum Corporation Method and system for tracking magnetic media with embedded optical servo tracks
US20050058044A1 (en) * 2003-09-12 2005-03-17 Koegler John M. Optical disk modified for speed and orientation tracking
US20050058042A1 (en) * 2003-09-12 2005-03-17 Hanks Darwin Mitchel Sensing media speed
US20050058043A1 (en) * 2003-09-12 2005-03-17 Koegler John M. Optical disk drive modified for speed and orientation tracking
US7496026B2 (en) * 2004-12-11 2009-02-24 Hewlett-Packard Development Company, L.P. Optical disc and method of printing optical disc

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3212074A (en) * 1960-12-15 1965-10-12 Sperry Rand Corp Magnetic disc file positional information apparatus
US3177476A (en) * 1961-05-29 1965-04-06 Rca Corp Information storage apparatus utilizing a record of internally reflective, light conducting material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2315142A1 (fr) * 1975-06-17 1977-01-14 Pyral Soc Procede de guidage d'une tete d'enregistrement et/ou de lecture d'un support magnetique

Also Published As

Publication number Publication date
DE1513215A1 (de) 1970-01-02
GB1070680A (en) 1967-06-01
US3426337A (en) 1969-02-04

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