US4352134A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic head assembly with corrosion resistant conductive wire
Assignee: International Business Machines Corp
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Filing: 1979-11-19
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Granted: 1982-09-28
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Expires: 1999-11-19
Abstract
Abstract A conductive wire useful with a magnetic head assembly is formed from a zirconium/copper alloy core, which is plated with a corrosion resistant conductive metal, such as gold. The wire is preferably covered with insulation, such as polyurethane.
Inventors
- 👤 Terry A. Burns
- 👤 Leslie H. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:17
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/127; G11B5/17; H; H01; H01B; H01B1/00; H01B1/02; H01B1/026; H01B3/00; H01B3/18; H01B3/30; H01B3/308
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
In a bidirectional accessing magnetic head assembly characterized by: a transducer core for bidirectional movement during accessing by said head assembly; a coiled wire coupled to said core for moving bidirectionally with said transducer core; the improvement wherein said wire is formed from a zirconium-copper alloy core; a layer of conductive metal deposited over said alloy core; an insulator coating surrounding said metal layer; and a circuit assembly attached to said wire by means of a fluxless solder reflow termination connection.
Claim 2
Dependent Claim
81 words
In a bidirectional accessing magnetic head assembly characterized by: a transducer core for bidirectional movement during accessing by said head assembly; a coiled wire coupled to said core for moving bidirectionally with said transducer core; the improvement wherein said wire is formed from a zirconium-copper alloy core; a layer of conductive metal deposited over said alloy core; an insulator coating surrounding said metal layer; and a circuit assembly attached to said wire by means of a fluxless solder reflow termination connection.
Claim 3
Dependent Claim
16 words
A magnetic head assembly as in claim 1, wherein the metal layer is made of gold.
Claim 4
Dependent Claim
19 words
A magnetic head assembly as in claim 1, wherein said alloy core consists of about 0.12% zirconium by weight.
Claim 5
Dependent Claim
18 words
A magnetic head assembly as in claim 1, wherein the diameter of said core is about 0.002 inch.
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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) | 1985-09-27 | 1986-03-29 | 1986-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-27 | 1990-03-29 | 1990-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-27 | 1994-03-29 | 1994-09-28 | $7700.00 | Window Closed / Lapsed |