US5373213A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for sensing operating shock on a disk drive
Assignee: Seagate Technology LLC
•
Filing: 1993-01-27
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Granted: 1994-12-13
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Expires: 2013-01-27
Abstract
Abstract A shock load detection device mounted on a disk drive unit. The detection device is comprised of a piezoelectric polymer film encapsulated and electrically shielded by a metallic or metallic coated package. Electrical contacts are provided for on the piezoelectric polymer film and are connected to amplification and comparator circuitry which issues a write fault signal upon detection of external force in excess of a predetermined threshold. The shock sensor may be mounted on the computer disk drive of the unit in such a manner as to be at a 45 DEG angle to each of the x, y and z axis of the orthogonal coordinate system so that linear and torsional forces may be monitored.
Inventors
- 👤 Robert F. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:38
CPC Classifications
G; G01; G01P; G01P15/00; G01P15/18; G01P15/02; G01P15/08; G01P15/09; G01P15/0922; G11; G11B; G11B19/00; G11B19/02; G11B19/04; G11B25/00; G11B25/04; G11B25/043; G11B33/00; G11B33/02; G11B33/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
182 words
An apparatus for mounting a strip of piezoelectric film having a thickness, the apparatus comprising a base member having a planar surface; a first conductive member having a portion affixed to the surface of the base member, said first conductive member having a plurality of first spring projections extending away from the surface of the base member in a first plane disposed at an angle oblique to the plane of the surface of the base member; a second conductive member having a portion affixed to the surface of the base member, said second conductive member having a second spring projection extending away from the surface of the base member in a second plane substantially parallel to the first plane; the first and second planes being spaced apart by a distance slightly less than the thickness of the piezoelectric film so that the first and second spring projections form a gap therebetween so that the first and second spring projections bear against a strip of piezoelectric film in the gap and to support and establish electronic contact to the strip of piezoelectric film.
Claim 2
Independent Claim
182 words
An apparatus for mounting a strip of piezoelectric film having a thickness, the apparatus comprising a base member having a planar surface; a first conductive member having a portion affixed to the surface of the base member, said first conductive member having a plurality of first spring projections extending away from the surface of the base member in a first plane disposed at an angle oblique to the plane of the surface of the base member; a second conductive member having a portion affixed to the surface of the base member, said second conductive member having a second spring projection extending away from the surface of the base member in a second plane substantially parallel to the first plane; the first and second planes being spaced apart by a distance slightly less than the thickness of the piezoelectric film so that the first and second spring projections form a gap therebetween so that the first and second spring projections bear against a strip of piezoelectric film in the gap and to support and establish electronic contact to the strip of piezoelectric film.
Claim 3
Dependent Claim
40 words
The apparatus of claim 1 further including a cover member attached to the base member to form an encapsulating device having a cavity encapsulating the plurality of projections to electrically shield a piezoelectric film supported by the plurality of projections.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1, wherein the first and second planes are disposed approximately at 45° to the surface of the base member.
Claim 5
Dependent Claim
14 words
The apparatus of claim 2, wherein the encapsulating device is metallic or metallic coated.
Claim 6
Dependent Claim
23 words
The apparatus of claim 4, wherein the first and second planes are disposed approximately at 45° to the surface of the base member.
Claim 7
Dependent Claim
23 words
The apparatus of claim 4, wherein the first and second planes are disposed approximately at 45° to the surface of the base member.
References Cited (Backward Citations)
US1949149A
Cited
DE757570C
Cited
GB538002A
Cited
US2326923A
Cited
US2392690A
Cited
US2380592A
Cited
US2383262A
Cited
US2384757A
Cited
FR939044A
Cited
US2464046A
Cited
US2814741A
Cited
US3679919A
Cited
US3622816A
Cited
US4322652A
Cited
JPS5718114A
Cited
US4550475A
Cited
US4431938A
Cited
DE3202394A1
Cited
US4532451A
Cited
US4639632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-12 | 1998-06-13 | 1998-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-12 | 2002-06-13 | 2002-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-12 | 2006-06-13 | 2006-12-13 | $7700.00 | Window Closed / Lapsed |