US4317149A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head having static discharge means
Assignee: International Business Machines Corp
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Filing: 1980-06-02
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Granted: 1982-02-23
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Expires: 2000-06-02
Abstract
Abstract A magnetic head assembly has conductive strips that serve as bypass paths to discharge static electrical charges at a distance from the effective magnetic pole pieces and transducing gap.
Inventors
- 👤 Karl H. Elser
- 👤 Russell R. Kerl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:12
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/40; G11B5/127; G11B5/31; G11B5/3109; G11B5/313; G11B5/3143
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A magnetic head assembly comprising: an electrically conductive air-bearing slider support; magnetic transducer means mounted to said slider support; means for conducting electrical signals to and from said transducer means; an insulating overcoat layer disposed over said magnetic transducer means; and conductive paths formed in said insulating overcoat layer for providing low resistance bleed paths that bypass said transducer means so that static electrical charges are discharged at an effective distance from said transducer means.
Claim 2
Dependent Claim
75 words
A magnetic head assembly comprising: an electrically conductive air-bearing slider support; magnetic transducer means mounted to said slider support; means for conducting electrical signals to and from said transducer means; an insulating overcoat layer disposed over said magnetic transducer means; and conductive paths formed in said insulating overcoat layer for providing low resistance bleed paths that bypass said transducer means so that static electrical charges are discharged at an effective distance from said transducer means.
Claim 3
Dependent Claim
18 words
A magnetic head assembly as in claim 1, wherein said conductive slider support is connected to ground potential.
Claim 4
Dependent Claim
24 words
A magnetic head assembly as in claim 1, wherein said conductive paths are formed with conductive material disposed in recessed of said overcoat layer.
Claim 5
Dependent Claim
23 words
A magnetic head assembly as in claim 1, wherein said slider support comprises air bearing rails at which said transducer means are located.
Claim 6
Dependent Claim
30 words
A magnetic head assembly as in claim 1, wherein said transducer means is formed with electrical coil means, and including means for coupling said coil means to said conductive paths.
Claim 7
Dependent Claim
26 words
A magnetic head assembly as in claim 1, wherein said conductive paths terminate at ends of said overcoat layer and close to said conductive slider support.
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) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |