Patent US3770905A successfully refreshed from Google Patents.
US3770905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tracking adjustment for magnetic disc recorder
Assignee: Meritor Inc
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Filing: 1972-06-27
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Granted: 1973-11-06
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Expires: 1992-06-27
Abstract
Abstract In a magnetic disc recorder, the transducer is positioned radially of the record disc by having a mounting block movable on a lead screw or equivalent, which is in turn driven by a positioning motor. The transducer is separately movable, for example by a manual control, for purposes of aligning the transducer with a recorded track, to optimize the playback of a recorded signal. In the disclosed embodiment the lead screw is movable lengthwise to a limited extent to achieve the alignment adjustment.
Inventors
- 👤 J Sperry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:29
CPC Classifications
G; G11; G11B; G11B17/00; G11B17/02; G11B17/04; G11B17/041; G11B17/043; G11B17/0434; G11B5/00; G11B5/48; G11B5/54; G11B5/55; G11B5/5521; G11B5/56
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
137 words
In a magnetic disc recorder, a disc of magnetic recording media having at least one recording surface, drive means connected for rotating said disc about an axis, a transducer cooperating with said disc to record and/or playback a signal, a support block carrying said transducer, means supporting said block for movement radially of said disc including a lead screw connected to cause translational movement of said block across said recording surface of said disc to follow one or more tracks on said disc, a support bracket for said lead screw, a motor connected to rotate said lead screw, and manually operated adjusting means connected to move said lead screw along its axis to cause movement of said block independent of lead screw rotation for correction of the alignment of said transducer with a track on said disc.
Claim 2
Dependent Claim
137 words
In a magnetic disc recorder, a disc of magnetic recording media having at least one recording surface, drive means connected for rotating said disc about an axis, a transducer cooperating with said disc to record and/or playback a signal, a support block carrying said transducer, means supporting said block for movement radially of said disc including a lead screw connected to cause translational movement of said block across said recording surface of said disc to follow one or more tracks on said disc, a support bracket for said lead screw, a motor connected to rotate said lead screw, and manually operated adjusting means connected to move said lead screw along its axis to cause movement of said block independent of lead screw rotation for correction of the alignment of said transducer with a track on said disc.
Claim 3
Dependent Claim
40 words
Apparatus as defined in claim 1, wherein said adjusting means includes a cam engaging one end of said lead screw, and an arm connected to move said cam for fine adjustment of the transducer position with respect to said disc.
Claim 4
Dependent Claim
48 words
Apparatus as defined in claim 1 wherein said bracket is mounted for movement parallel to the axis of said lead screw, a cam engaging said bracket, means for moving said cam to adjust the position of said bracket, and means urging said bracket into contact with said cam.
Claim 5
Dependent Claim
122 words
In a magnetic disc recorder having a thin flexible disc of magnetic recording media, drive means connected for rotating said disc about an axis, a transducer cooperating with said disc to record and/or playback a signal from a track on said disc, a support block carrying said transducer, means supporting said block for movement including a rotatably driven lead screw causing translational movement of said block along a radius of said disc to follow one or more tracks on the rotating disc, a support bracket for said lead screw, and manually operable adjusting means connected to move said lead screw along its axis over a limited range independent of lead screw rotation for aligning said transducer with a track on said disc.
Claim 6
Dependent Claim
122 words
In a magnetic disc recorder having a thin flexible disc of magnetic recording media, drive means connected for rotating said disc about an axis, a transducer cooperating with said disc to record and/or playback a signal from a track on said disc, a support block carrying said transducer, means supporting said block for movement including a rotatably driven lead screw causing translational movement of said block along a radius of said disc to follow one or more tracks on the rotating disc, a support bracket for said lead screw, and manually operable adjusting means connected to move said lead screw along its axis over a limited range independent of lead screw rotation for aligning said transducer with a track on said disc.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |