GB1501519A – Testing of magnetic recording and reproducing apparatus
– Google Patents
GB1501519A – Testing of magnetic recording and reproducing apparatus
– Google Patents
Testing of magnetic recording and reproducing apparatus
Info
Publication number
GB1501519A
GB1501519A
GB31149/75A
GB3114975A
GB1501519A
GB 1501519 A
GB1501519 A
GB 1501519A
GB 31149/75 A
GB31149/75 A
GB 31149/75A
GB 3114975 A
GB3114975 A
GB 3114975A
GB 1501519 A
GB1501519 A
GB 1501519A
Authority
GB
United Kingdom
Prior art keywords
testing
magnetic recording
reproducing apparatus
test
heading
Prior art date
1974-08-06
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
GB31149/75A
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.)
1974-08-06
Filing date
1975-07-25
Publication date
1978-02-15
1975-07-25
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1978-02-15
Publication of GB1501519A
publication
Critical
patent/GB1501519A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
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
G11B5/584—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 tapes
G11B5/588—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 tapes by controlling the position of the rotating heads
G—PHYSICS
G11—INFORMATION STORAGE
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
G11B20/10—Digital recording or reproducing
G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
G11B20/1816—Testing
G11B20/182—Testing using test patterns
Abstract
1501519 Test tape INTERNATIONAL BUSINESS MACHINES CORP 25 July 1975 [6 Aug 1974] 31149/75 Heading G5R The description is the same as that relating to test B in Specification 1,501,520 and the claims relate to that test.
GB31149/75A
1974-08-06
1975-07-25
Testing of magnetic recording and reproducing apparatus
Expired
GB1501519A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US05/495,164
US3947875A
(en)
1974-08-06
1974-08-06
Magnetic recorder test article and methods
Publications (1)
Publication Number
Publication Date
GB1501519A
true
GB1501519A
(en)
1978-02-15
Family
ID=23967524
Family Applications (2)
Application Number
Title
Priority Date
Filing Date
GB31162/75A
Expired
GB1501520A
(en)
1974-08-06
1975-07-25
Testing of magnetic recording and reproducing apparatus
GB31149/75A
Expired
GB1501519A
(en)
1974-08-06
1975-07-25
Testing of magnetic recording and reproducing apparatus
Family Applications Before (1)
Application Number
Title
Priority Date
Filing Date
GB31162/75A
Expired
GB1501520A
(en)
1974-08-06
1975-07-25
Testing of magnetic recording and reproducing apparatus
Country Status (12)
Country
Link
US
(1)
US3947875A
(en)
JP
(1)
JPS5643528B2
(en)
AU
(1)
AU500553B2
(en)
BE
(1)
BE831314A
(en)
BR
(1)
BR7505031A
(en)
CA
(1)
CA1059617A
(en)
DE
(1)
DE2533512C3
(en)
FR
(1)
FR2281621A1
(en)
GB
(2)
GB1501520A
(en)
IT
(1)
IT1039148B
(en)
NL
(1)
NL7509380A
(en)
ZA
(1)
ZA754762B
(en)
Families Citing this family (15)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US4142215A
(en)
*
1977-12-02
1979-02-27
The Telex Corporation
Tape drive tester
JPS54118210A
(en)
*
1978-03-06
1979-09-13
Victor Co Of Japan Ltd
Bias current setting device
US4214280A
(en)
*
1978-05-30
1980-07-22
Xerox Corporation
Method and apparatus for recording data without recording on defective areas of a data recording medium
DE2928311A1
(en)
*
1979-07-13
1981-02-05
Basf Ag
TRACKING CONTROL FOR A SYSTEM FOR RECORDING / PLAYING BACK INFORMATION ON A MAGNETIC RECORDING CARRIER, IN PARTICULAR A FLEXIBLE MAGNETIC RECORDING CARRIER
US4764915A
(en)
*
1982-01-12
1988-08-16
Discovision Associates
Method and apparatus for recording a multiplexed signal on a record medium
US4491881A
(en)
*
1982-02-01
1985-01-01
Verbatim Corporation
Calibrated drop-out disk
US4513333A
(en)
*
1982-02-24
1985-04-23
Dymek Corporation
Diagnostic recording
JPS6053914U
(en)
*
1983-09-20
1985-04-16
旭化成株式会社
PC board mounting device
US4612586A
(en)
*
1984-06-05
1986-09-16
Memorex Corporation
Method for measuring timing asymmetry in a magnetic storage system
JPS61284820A
(en)
*
1985-06-11
1986-12-15
Alps Electric Co Ltd
Head position controlling method
US4821125A
(en)
*
1986-06-11
1989-04-11
International Business Machines Corporation
Compensation of write current adn delta-V for recording component and radial position
US4887171A
(en)
*
1988-04-04
1989-12-12
E-Systems, Inc.
Slant record/helical scan playback certifier
US4916294A
(en)
*
1988-07-25
1990-04-10
Light Signatures, Inc.
System for reliable digital recording on unreliable magnetic media
JPH04286777A
(en)
*
1991-03-17
1992-10-12
Sony Corp
Magnetic recording device
US9576599B1
(en)
2015-11-30
2017-02-21
International Business Machines Corporation
Monitoring head wear
Family Cites Families (11)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
DE1276690B
(en)
*
1959-08-11
1968-09-05
Ampex
System for playing back a broadband recording contained on a magnetic recording medium
NL255725A
(en)
*
1960-09-08
US3230307A
(en)
*
1962-09-04
1966-01-18
Ampex
Interlock system for wideband magnetic recording and reproducing systems
DE1286107B
(en)
*
1964-06-06
1969-01-02
Fernseh Gmbh
Device for recording or picking up electrical signals
US3506814A
(en)
*
1965-06-10
1970-04-14
Burroughs Corp
Marginal test method and apparatus
US3436652A
(en)
*
1966-05-10
1969-04-01
Meterimpex Magyar Muszeripari
Method for measuring delay and distortion of frequency components
US3463878A
(en)
*
1967-01-13
1969-08-26
Ibm
Video recording apparatus
US3686682A
(en)
*
1970-08-17
1972-08-22
Burroughs Corp
Method and apparatus for testing magnetic disc files
US3711691A
(en)
*
1971-05-13
1973-01-16
Ibm
Peripheral device analysis
US3846831A
(en)
*
1973-03-07
1974-11-05
Micro Communications Corp
Sound reproducing apparatus in which the drive means operates in response to a prerecorded control signal
US3864739A
(en)
*
1973-08-24
1975-02-04
Ibm
Tape motion control in an incrementing magnetic tape transport
1974
1974-08-06
US
US05/495,164
patent/US3947875A/en
not_active
Expired – Lifetime
1975
1975-02-14
CA
CA220,386A
patent/CA1059617A/en
not_active
Expired
1975-06-20
IT
IT24577/75A
patent/IT1039148B/en
active
1975-06-30
AU
AU82580/75A
patent/AU500553B2/en
not_active
Expired
1975-07-01
FR
FR7521461A
patent/FR2281621A1/en
active
Granted
1975-07-11
BE
BE158252A
patent/BE831314A/en
not_active
IP Right Cessation
1975-07-23
ZA
ZA754762A
patent/ZA754762B/en
unknown
1975-07-25
JP
JP9035675A
patent/JPS5643528B2/ja
not_active
Expired
1975-07-25
GB
GB31162/75A
patent/GB1501520A/en
not_active
Expired
1975-07-25
GB
GB31149/75A
patent/GB1501519A/en
not_active
Expired
1975-07-26
DE
DE2533512A
patent/DE2533512C3/en
not_active
Expired
1975-08-06
NL
NL7509380A
patent/NL7509380A/en
not_active
Application Discontinuation
1975-08-06
BR
BR7505031*A
patent/BR7505031A/en
unknown
Also Published As
Publication number
Publication date
CA1059617A
(en)
1979-07-31
DE2533512B2
(en)
1980-08-28
GB1501520A
(en)
1978-02-15
DE2533512C3
(en)
1981-05-27
NL7509380A
(en)
1976-02-10
BR7505031A
(en)
1976-08-03
AU500553B2
(en)
1979-05-24
FR2281621B1
(en)
1977-07-22
DE2533512A1
(en)
1976-02-26
BE831314A
(en)
1975-11-03
FR2281621A1
(en)
1976-03-05
US3947875A
(en)
1976-03-30
AU8258075A
(en)
1977-01-06
JPS5139015A
(en)
1976-04-01
ZA754762B
(en)
1977-02-23
IT1039148B
(en)
1979-12-10
JPS5643528B2
(en)
1981-10-13
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Testing of magnetic recording and reproducing apparatus
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Legal Events
Date
Code
Title
Description
1978-06-28
PS
Patent sealed [section 19, patents act 1949]
1987-03-18
PCNP
Patent ceased through non-payment of renewal fee
