GB1339091A – Bidirectional magnetic head for use with magnetic tape drives
– Google Patents
GB1339091A – Bidirectional magnetic head for use with magnetic tape drives
– Google Patents
Bidirectional magnetic head for use with magnetic tape drives
Info
Publication number
GB1339091A
GB1339091A
GB3227472A
GB3227472A
GB1339091A
GB 1339091 A
GB1339091 A
GB 1339091A
GB 3227472 A
GB3227472 A
GB 3227472A
GB 3227472 A
GB3227472 A
GB 3227472A
GB 1339091 A
GB1339091 A
GB 1339091A
Authority
GB
United Kingdom
Prior art keywords
tape
arc
gap
read
bidirectional
Prior art date
1971-09-13
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
GB3227472A
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.)
1971-09-13
Filing date
1972-07-11
Publication date
1973-11-28
1972-07-11
Application filed by International Business Machines Corp
filed
Critical
International Business Machines Corp
1973-11-28
Publication of GB1339091A
publication
Critical
patent/GB1339091A/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
G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
G11B15/60—Guiding record carrier
G11B15/62—Maintaining desired spacing between record carrier and head
G11B15/64—Maintaining desired spacing between record carrier and head by fluid-dynamic spacing
G—PHYSICS
G11—INFORMATION STORAGE
G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
G11B15/56—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith
G11B15/58—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function the record carrier having reserve loop, e.g. to minimise inertia during acceleration measuring or control in connection therewith with vacuum column
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
G11B5/488—Disposition of heads
G11B5/4893—Disposition of heads relative to moving tape
Abstract
1339091 Magnetic transducers INTERNATIONAL BUSINESS MACHINES CORP 11 July 1972 [13 Sept 1971] 32274/72 Heading G5R A head for use with a bidirectional magnetic tape drive has a contour 6 comprising two circular arcs, on which two transducing gaps 1, 2 for reading and writing, respectively, are disposed in positions which are offset relative to the arc centres 12, 13 in opposite directions and by different amounts 21, 22 measured parallel to the line joining the arc centres 12, 13, the read gap offset 21 being greater than the writegap offset 22. As shown, the arc radii R R and R W are equal, and gap 1 is for bidirectional reading, gap 2 for unidirectional writing. Preferably the read gap 1 is in the centre 14 of the tape-contact arc 7-8 and write gap 2 is displaced downstream of the centre 15 of the tapecontact arc 9-10. The tape transport, Fig. 2 (not shown), is preferably arranged so that the read tape-contact arc 7-8 is approximately twice the write tape-contact arc 9-10. The above head geometry is intended to equalize the tape-to-head separation at the read gap, and hence the read characteristics, for the two directions of tape transport.
GB3227472A
1971-09-13
1972-07-11
Bidirectional magnetic head for use with magnetic tape drives
Expired
GB1339091A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US17986671A
1971-09-13
1971-09-13
Publications (1)
Publication Number
Publication Date
GB1339091A
true
GB1339091A
(en)
1973-11-28
Family
ID=22658320
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB3227472A
Expired
GB1339091A
(en)
1971-09-13
1972-07-11
Bidirectional magnetic head for use with magnetic tape drives
Country Status (8)
Country
Link
JP
(1)
JPS4838115A
(en)
BE
(1)
BE788510A
(en)
BR
(1)
BR7205825D0
(en)
CA
(1)
CA1005572A
(en)
DE
(1)
DE2239583C3
(en)
FR
(1)
FR2152619B1
(en)
GB
(1)
GB1339091A
(en)
IT
(1)
IT964136B
(en)
Cited By (3)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1986000456A1
(en)
*
1984-06-25
1986-01-16
Sony Corporation
Composite magnetic head device
EP0518649A2
(en)
*
1991-06-11
1992-12-16
Matsushita Electric Industrial Co., Ltd.
Bi-directional tape recording/reproducing device
US5436780A
(en)
*
1991-06-03
1995-07-25
Matsushita Electric Industrial Co., Ltd.
Thin film magnetic head device
0
BE
BE788510D
patent/BE788510A/en
unknown
1972
1972-07-11
GB
GB3227472A
patent/GB1339091A/en
not_active
Expired
1972-08-11
DE
DE19722239583
patent/DE2239583C3/en
not_active
Expired
1972-08-22
IT
IT2835972A
patent/IT964136B/en
active
1972-08-23
JP
JP47083818A
patent/JPS4838115A/ja
active
Pending
1972-08-24
BR
BR582572A
patent/BR7205825D0/en
unknown
1972-08-29
FR
FR7231320A
patent/FR2152619B1/fr
not_active
Expired
1972-09-11
CA
CA151,339A
patent/CA1005572A/en
not_active
Expired
Cited By (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
WO1986000456A1
(en)
*
1984-06-25
1986-01-16
Sony Corporation
Composite magnetic head device
US4713710A
(en)
*
1984-06-25
1987-12-15
Sony Corporation
Compact multiple magnetic head apparatus
US5436780A
(en)
*
1991-06-03
1995-07-25
Matsushita Electric Industrial Co., Ltd.
Thin film magnetic head device
EP0518649A2
(en)
*
1991-06-11
1992-12-16
Matsushita Electric Industrial Co., Ltd.
Bi-directional tape recording/reproducing device
EP0518649A3
(en)
*
1991-06-11
1994-04-27
Matsushita Electric Ind Co Ltd
Also Published As
Publication number
Publication date
FR2152619A1
(en)
1973-04-27
BR7205825D0
(en)
1973-07-03
JPS4838115A
(en)
1973-06-05
BE788510A
(en)
1973-01-02
DE2239583B2
(en)
1974-12-19
IT964136B
(en)
1974-01-21
CA1005572A
(en)
1977-02-15
FR2152619B1
(en)
1975-10-03
DE2239583A1
(en)
1973-03-29
DE2239583C3
(en)
1975-08-21
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Legal Events
Date
Code
Title
Description
1974-04-10
PS
Patent sealed
1984-03-07
PCNP
Patent ceased through non-payment of renewal fee
