US4375656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head assembly with asymmetric slotted configuration
Assignee: International Business Machines Corp
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Filing: 1980-10-09
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Granted: 1983-03-01
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Expires: 2000-10-09
Abstract
Abstract A flexible disk file employs a pivotable head arm which supports a grooved magnetic head. The magnetic head is formed with an asymmetric groove so that skew of the head relative to the rotating flexible disk surface is compensated.
Inventors
- 👤 Anton J. Radman, Jr.
- 👤 Ricardo Yudico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:52
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/187; G11B5/1871; G11B17/00; G11B17/32; G11B5/48; G11B5/488; G11B5/4886
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
159 words
A magnetic head assembly useful for transducing coaction with a flexible magnetic disk comprising: a support arm; a magnetic head mounted to said arm, said head having a contoured face with a centrally located transducing gap; first and second grooves formed on said contoured face and symmetrically disposed about said transducing gap with the axes of said grooves being substantially perpendicular to the axis of said transducing gap; third and fourth grooves formed on said contoured face and disposed parallel to said first and second grooves and spaced symmetrically about said first and second grooves and said transducing gap, said first and third grooves being located inboard of said gap, said second and fourth grooves being located outboard of said gap; an offset groove formed on said contoured face outboard of said fourth groove towards the outer portion of said head relative to the periphery of said disk, all of said grooves being substantially parallel on said contoured face.
Claim 2
Dependent Claim
159 words
A magnetic head assembly useful for transducing coaction with a flexible magnetic disk comprising: a support arm; a magnetic head mounted to said arm, said head having a contoured face with a centrally located transducing gap; first and second grooves formed on said contoured face and symmetrically disposed about said transducing gap with the axes of said grooves being substantially perpendicular to the axis of said transducing gap; third and fourth grooves formed on said contoured face and disposed parallel to said first and second grooves and spaced symmetrically about said first and second grooves and said transducing gap, said first and third grooves being located inboard of said gap, said second and fourth grooves being located outboard of said gap; an offset groove formed on said contoured face outboard of said fourth groove towards the outer portion of said head relative to the periphery of said disk, all of said grooves being substantially parallel on said contoured face.
Claim 3
Dependent Claim
14 words
A magnetic head assembly as in claim 1, wherein said support arm is pivotable.
Claim 4
Dependent Claim
20 words
A magnetic head assembly as in claim 1, wherein said magnetic head is formed from a ferrite or ceramic slab.
Claim 5
Dependent Claim
154 words
A magnetic head assembly useful for transducing coaction with a flexible magnetic disk comprising: a pivotable support arm; a magnetic head mounted to said arm, said head having a contoured face having a centrally located transducing gap; first and second grooves formed on said contoured face and symmetrically disposed about said transducing gap with the axes of said grooves being substantially perpendicular to the axis of said transducing gap; third and fourth grooves formed on said contoured face and disposed parallel to said first and second grooves and spaced about said first and second grooves and said transducing gap, said first and third grooves being located inboard of said gap, said second and fourth grooves being located outboard of said gap; said first, second and third grooves having the same width; and said fourth groove being wider than said first, second and third grooves so that head skew relative to the disk is compensated.
Claim 6
Dependent Claim
154 words
A magnetic head assembly useful for transducing coaction with a flexible magnetic disk comprising: a pivotable support arm; a magnetic head mounted to said arm, said head having a contoured face having a centrally located transducing gap; first and second grooves formed on said contoured face and symmetrically disposed about said transducing gap with the axes of said grooves being substantially perpendicular to the axis of said transducing gap; third and fourth grooves formed on said contoured face and disposed parallel to said first and second grooves and spaced about said first and second grooves and said transducing gap, said first and third grooves being located inboard of said gap, said second and fourth grooves being located outboard of said gap; said first, second and third grooves having the same width; and said fourth groove being wider than said first, second and third grooves so that head skew relative to the disk is compensated.
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) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |