FR2315142B1 - - Google Patents

Info

Publication number
FR2315142B1
FR2315142B1 FR7518837A FR7518837A FR2315142B1 FR 2315142 B1 FR2315142 B1 FR 2315142B1 FR 7518837 A FR7518837 A FR 7518837A FR 7518837 A FR7518837 A FR 7518837A FR 2315142 B1 FR2315142 B1 FR 2315142B1
Authority
FR
France
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
FR7518837A
Other languages
French (fr)
Other versions
FR2315142A1 (fr
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.)
PYRAL SOC
Original Assignee
PYRAL SOC
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 PYRAL SOC filed Critical PYRAL SOC
Priority to FR7518837A priority Critical patent/FR2315142A1/fr
Publication of FR2315142A1 publication Critical patent/FR2315142A1/fr
Application granted granted Critical
Publication of FR2315142B1 publication Critical patent/FR2315142B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/005—Programmed access to indexed parts of tracks of operating discs, by guiding the disc
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/38—Visual features other than those contained in record tracks or represented by sprocket holes the visual signals being auxiliary signals
    • G11B23/42—Marks for indexing, speed-controlling, synchronising, or timing
    • 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
    • G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
    • 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
    • G11B5/596—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 for track following on disks
    • G11B5/59677—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 for track following on disks with optical servo tracking
FR7518837A 1975-06-17 1975-06-17 Procede de guidage d'une tete d'enregistrement et/ou de lecture d'un support magnetique Granted FR2315142A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7518837A FR2315142A1 (fr) 1975-06-17 1975-06-17 Procede de guidage d'une tete d'enregistrement et/ou de lecture d'un support magnetique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7518837A FR2315142A1 (fr) 1975-06-17 1975-06-17 Procede de guidage d'une tete d'enregistrement et/ou de lecture d'un support magnetique

Publications (2)

Publication Number Publication Date
FR2315142A1 FR2315142A1 (fr) 1977-01-14
FR2315142B1 true FR2315142B1 (US06573293-20030603-C00009.png) 1977-12-02

Family

ID=9156609

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7518837A Granted FR2315142A1 (fr) 1975-06-17 1975-06-17 Procede de guidage d'une tete d'enregistrement et/ou de lecture d'un support magnetique

Country Status (1)

Country Link
FR (1) FR2315142A1 (US06573293-20030603-C00009.png)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape
US6741415B1 (en) 1999-02-16 2004-05-25 Quantum Corporation Method of writing servo signal on magnetic tape
US6768608B2 (en) 1998-03-24 2004-07-27 Quantum Corporation Multi-channel magnetic tape system having optical tracking servo
US6771450B1 (en) 1999-02-17 2004-08-03 Quantum Corporation Method of writing servo signal on magnetic tape

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5280007A (en) * 1975-12-26 1977-07-05 Sony Corp Video disc
DE2615838C2 (de) * 1976-04-10 1985-02-07 Philips Patentverwaltung Gmbh, 2000 Hamburg Vorrichtung zur Positionsregelung eines Schreib-Lesekopfes für Datenträger mit einer Magnetspeicherschicht
NL7705111A (nl) * 1977-05-10 1978-11-14 Philips Nv Magneetband met optische waarneembare mar- keringen en werkwijze voor het vervaardigen van een dergelijke band.
US4633451A (en) * 1982-06-30 1986-12-30 International Business Machines Corporation Optical servo for magnetic disks
EP0097774A3 (en) * 1982-06-30 1986-02-05 International Business Machines Corporation Transducing system
US4587579A (en) * 1982-12-30 1986-05-06 International Business Machines Corporation System for position detection on a rotating disk
WO1985002933A1 (en) * 1983-12-27 1985-07-04 Ncr Corporation Magnetic record medium and apparatus and method for tracking the same
US4816939A (en) * 1986-08-21 1989-03-28 Polaroid Corporation Magnetic recording media and servo systems using light-transmitting optical gratings
WO1990004846A1 (de) * 1988-10-25 1990-05-03 Siemens Aktiengesellschaft Abtasteinheit für einen magnetplattenspeicher
GB9224003D0 (en) * 1992-11-16 1993-01-06 Minnesota Mining & Mfg Magnetic recording materials
US6246535B1 (en) * 1998-11-13 2001-06-12 Quantum Corporation Optical apparatus for tracking a magnetic tape

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1350194A (fr) * 1962-02-05 1964-01-24 Sperry Rand Corp Dispositif pour placer de façon correcte un transducteur par rapport à une piste d'enregistrement
US3803350A (en) * 1969-03-17 1974-04-09 J Lemelson Record card scanning apparatus
US3426337A (en) * 1964-12-21 1969-02-04 Ibm Positioning system for random access device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6768608B2 (en) 1998-03-24 2004-07-27 Quantum Corporation Multi-channel magnetic tape system having optical tracking servo
US6741415B1 (en) 1999-02-16 2004-05-25 Quantum Corporation Method of writing servo signal on magnetic tape
US6771450B1 (en) 1999-02-17 2004-08-03 Quantum Corporation Method of writing servo signal on magnetic tape
US6558774B1 (en) 1999-08-17 2003-05-06 Quantum Corporation Multiple-layer backcoating for magnetic tape

Also Published As

Publication number Publication date
FR2315142A1 (fr) 1977-01-14

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Legal Events

Date Code Title Description
ST Notification of lapse