GB1374571A - Testing of recording and reproducing equipment - Google Patents

Testing of recording and reproducing equipment

Info

Publication number
GB1374571A
GB1374571A GB2202073A GB2202073A GB1374571A GB 1374571 A GB1374571 A GB 1374571A GB 2202073 A GB2202073 A GB 2202073A GB 2202073 A GB2202073 A GB 2202073A GB 1374571 A GB1374571 A GB 1374571A
Authority
GB
United Kingdom
Prior art keywords
recording
testing
head
khz
follow
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
GB2202073A
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of GB1374571A publication Critical patent/GB1374571A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G11B21/04—Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw
    • G11B21/043—Automatic feed mechanism producing a progressive transducing traverse of the head in a direction which cuts across the direction of travel of the recording medium, e.g. helical scan, e.g. by lead-screw for stationary discs
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • 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
    • G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00804—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic sheets
    • 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

  • Recording Or Reproducing By Magnetic Means (AREA)
  • Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
GB2202073A 1972-05-16 1973-05-09 Testing of recording and reproducing equipment Expired GB1374571A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP47048842A JPS499203A (US06878557-20050412-C00065.png) 1972-05-16 1972-05-16

Publications (1)

Publication Number Publication Date
GB1374571A true GB1374571A (en) 1974-11-20

Family

ID=12814489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2202073A Expired GB1374571A (en) 1972-05-16 1973-05-09 Testing of recording and reproducing equipment

Country Status (4)

Country Link
US (1) US3962724A (US06878557-20050412-C00065.png)
JP (1) JPS499203A (US06878557-20050412-C00065.png)
DE (1) DE2323731C3 (US06878557-20050412-C00065.png)
GB (1) GB1374571A (US06878557-20050412-C00065.png)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4992893A (en) * 1986-02-19 1991-02-12 Hitachi, Ltd. Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4504871A (en) * 1980-01-08 1985-03-12 Verbatim Corporation Magnetic media test fixture apparatus
US4608618A (en) * 1984-10-25 1986-08-26 Verbatim Corporation Digital alignment diagnostic disk
DE3540803A1 (de) * 1985-11-16 1987-05-21 Thomson Brandt Gmbh Plattenabspielgeraet mit einem schwenkbaren tonarm
US5254946A (en) * 1992-02-25 1993-10-19 Guzik Technical Enterprises, Inc. Magnetic head and disk tester with head centrally mounted on radially-moving, rotatable platform that surrounds disk
US6278784B1 (en) * 1998-12-20 2001-08-21 Peter Gerard Ledermann Intermittent errors in digital disc players
US6330122B1 (en) 1999-05-24 2001-12-11 International Business Machines Corporation Magnetic tester for disk surface scan
US8559122B2 (en) * 2006-12-22 2013-10-15 HGST Netherlands B.V. Integrated spiral certification head for media magnetic testing including PMR and LMR media

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3530258A (en) * 1968-06-28 1970-09-22 Mca Technology Inc Video signal transducer having servo controlled flexible fiber optic track centering
US3742470A (en) * 1971-12-30 1973-06-26 Information Storage Systems Memory disc pack drive having accurate read/write head positioning
US3740736A (en) * 1972-02-28 1973-06-19 Memorex Corp Spiral recording with error checking

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4992893A (en) * 1986-02-19 1991-02-12 Hitachi, Ltd. Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus

Also Published As

Publication number Publication date
DE2323731B2 (de) 1978-04-13
DE2323731A1 (de) 1973-11-29
US3962724A (en) 1976-06-08
JPS499203A (US06878557-20050412-C00065.png) 1974-01-26
DE2323731C3 (de) 1978-11-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee