Patent US4903150A successfully refreshed from Google Patents.
US4903150A
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US
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Multitrack magnetic recording and reproducing apparatus and method of controlling tracking of multitrack magnetic heads
Assignee: CREDITANSTALT BANKVEREIN
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Filing: 1987-12-21
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Granted: 1990-02-20
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Expires: 2007-12-21
Abstract
Abstract The preferred embodiment of the present inventioin hereby offers a unique and extremely useful multi-track magnetic recording and reproducing apparatus including: a data feed-out device comprised of one or two units of data-reproducing head(s) dealing with some of a plurality of data-recording heads; a control circuit controlling the tracking operations of the data-reproducing heads in response to the output of these reproducing heads; and an azimuth control circuit controlling the deviation time of synchronizing signals in response to the outputs of these reproducing heads.
Inventors
- 👤 Hiromi Juso
- 👤 Kengo Sudoh
- 👤 Yukihiko Haikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:29
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/58; G11B5/584; G11B15/00; G11B15/02; G11B15/026; G11B20/00; G11B20/20; G11B27/00; G11B27/02; G11B27/031; G11B27/036; G11B27/10; G11B27/102; G11B27/107; G11B27/19; G11B27/28; G11B27/32; G11B27/322; G11B2220/00; G11B2220/90; G11B2220/91; G11B2220/913; G11B27/032; G11B5/488; G11B5/4893
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
150 words
Multi-track magnetic recording and reproducing apparatus for use with a recording medium having a plurality of data recording tracks that store information, comprising: recording means for recording information onto the data recording tracks, said recording means including a plurality of recording magnetic heads; data feed-out means for reproducing information stored on the plurality of data recording tracks, said data feed-out means includes a pair of reproducing magnetic heads associated with each of said recording magnetic heads and each data recording track; control means for controlling a tracking operation of said reproducing magnetic heads in accordance with an output that is produced by each said pair of said reproducing magnetic heads; and azimuth control means for controlling a deviation of synchronizing signals, said synchronizing signals providing synchronous operation of said plurality of recording magnetic heads, in accordance with an output that is produced by each pair of said reproducing magnetic heads.
Claim 2
Dependent Claim
150 words
Multi-track magnetic recording and reproducing apparatus for use with a recording medium having a plurality of data recording tracks that store information, comprising: recording means for recording information onto the data recording tracks, said recording means including a plurality of recording magnetic heads; data feed-out means for reproducing information stored on the plurality of data recording tracks, said data feed-out means includes a pair of reproducing magnetic heads associated with each of said recording magnetic heads and each data recording track; control means for controlling a tracking operation of said reproducing magnetic heads in accordance with an output that is produced by each said pair of said reproducing magnetic heads; and azimuth control means for controlling a deviation of synchronizing signals, said synchronizing signals providing synchronous operation of said plurality of recording magnetic heads, in accordance with an output that is produced by each pair of said reproducing magnetic heads.
Claim 3
Independent Claim
135 words
A method for controlling the tracking operations of multi-track magnetic heads, more particularly, a method of controlling the tracking operations of a plurality of multi-track recording magnetic heads and a plurality of multi-track reproducing magnetic heads all heads situated against a magnetic tape having a plurality of data tracks, comprising the steps of: providing a pair of the reproducing magnetic heads for each individual recording head to form a plurality of groups having two reproducing heads and one recording head, each group corresponding to one of the plurality of data tracks; detecting differences in output of each pair of said reproducing magnetic heads that corresponds to each recording magnetic head and producing a first signal that corresponds to all of the detected differences; and tracking respective reproducing magnetic heads in response to said first signal.
Claim 4
Independent Claim
135 words
A method for controlling the tracking operations of multi-track magnetic heads, more particularly, a method of controlling the tracking operations of a plurality of multi-track recording magnetic heads and a plurality of multi-track reproducing magnetic heads all heads situated against a magnetic tape having a plurality of data tracks, comprising the steps of: providing a pair of the reproducing magnetic heads for each individual recording head to form a plurality of groups having two reproducing heads and one recording head, each group corresponding to one of the plurality of data tracks; detecting differences in output of each pair of said reproducing magnetic heads that corresponds to each recording magnetic head and producing a first signal that corresponds to all of the detected differences; and tracking respective reproducing magnetic heads in response to said first signal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-19 | 1993-08-21 | 1994-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-19 | 1997-08-21 | 1998-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-19 | 2001-08-21 | 2002-02-20 | $7700.00 | Window Closed / Lapsed |