US4451812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic shield
Assignee: Sphere Investments Ltd
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Filing: 1982-04-27
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Granted: 1984-05-29
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Expires: 2002-04-27
Abstract
Abstract An electrostatic shield for an electrical conductor element comprises a sheet-like array of closely spaced elongate electrical conductors interconnected at one end of the array by an end conductor for connection to a common or ground potential. The conductor to be shielded may be in the form of a loop or coil printed on one face of an insulating plate and the array of shielding conductors and the end conductor may be printed on the other face of the insulating plate. The shield may include two or more series of parallel conductors arranged in adjacent banks and each provided with a separate end connecting conductor.
Inventors
- 👤 Valentino F. Vescovi
- 👤 Arthur W. Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:28
CPC Classifications
H; H05; H05K; H05K9/00; H05K9/0007; H05K9/002; H05K9/0039
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
An electrostatically shielded conductor unit comprising an electrically insulating plate having a first face and an opposite face, a coil having a longitudinal axis and formed in a path of generally rectangular configuration in the plane of said first face formed on said first face by a printed circuit technique, the longitudinal axis extending along the coil and following the rectangular configuration, an electrostatic shield in the form of a sheet-like array of closely spaced elongate conductors disposed so that where elongate conductors cross the coil, they all do so at right angles to the longitudinal axis thereof, said conductors being formed on said opposite face of said plate by a printed circuit technique, and means for connecting the elongate conductors to a common potential.
Claim 2
Dependent Claim
125 words
An electrostatically shielded conductor unit comprising an electrically insulating plate having a first face and an opposite face, a coil having a longitudinal axis and formed in a path of generally rectangular configuration in the plane of said first face formed on said first face by a printed circuit technique, the longitudinal axis extending along the coil and following the rectangular configuration, an electrostatic shield in the form of a sheet-like array of closely spaced elongate conductors disposed so that where elongate conductors cross the coil, they all do so at right angles to the longitudinal axis thereof, said conductors being formed on said opposite face of said plate by a printed circuit technique, and means for connecting the elongate conductors to a common potential.
Claim 3
Dependent Claim
38 words
A shielded conductor unit as in claim 1 wherein the thickness of the insulating plate is such that one face and the other face are separated by a distance greater than the separation between the closely spaced conductors.
Claim 4
Dependent Claim
21 words
A shielded conductor unit as in claim 2 in which said distance is at least several times greater than said separation.
Claim 5
Dependent Claim
19 words
A shielded conductor unit as in claim 3 in which said distance is ten times greater than said separation.
References Cited (Backward Citations)
DE129022C
Cited
US1942575A
Cited
US1651922A
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FR844426A
Cited
US2234998A
Cited
US2786984A
Cited
US3546358A
Cited
JPS528423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-29 | 1987-11-28 | 1988-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-29 | 1991-11-28 | 1992-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-29 | 1995-11-28 | 1996-05-29 | $7700.00 | Window Closed / Lapsed |