US4533784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet material for and a cable having an extensible electrical shield
Assignee: 3M Co
•
Filing: 1983-07-29
•
Granted: 1985-08-06
•
Expires: 2003-07-29
Abstract
Abstract An electrical cable (22, 28) with a sheet material (10) used as air electrical shield having a continuous metallic foil (12) having a plurality of transverse folds (14). The transverse folds (14) are flattened to form a plurality of transverse overlaps (16) of the continuous metallic foil (12) such that the elongation of the sheet material (10) exhibits a nonlinear yield behavior upon the application of longitudinal force (42). In a preferred embodiment, the transverse folds (14) form a plurality of pairs of faces (60, 62) with an interior angle (64) of not more than three degrees. A cable (22, 28) is formed by securing the sheet material (10) to at least one insulation (26) encased conductor (24). The sheet material (10) is formed by corrugating a sheet of continuous metallic foil (12) to form a plurality of flattened transverse folds (14) to form a plurality of continuous overlaps (16).
Inventors
- 👤 Murray Olyphant, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:38
CPC Classifications
H; H01; H01B; H01B11/00; H01B11/02; H01B11/06; H01B11/10; H01B11/1016; H01B13/00; H01B13/22; H01B13/26; H01B13/2613
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
60 words
An electrical cable, comprising: at least one conductor; insulation encasing said at least one conductor; a sheet material comprising a continuous metallic foil having a plurality of flattened transverse folds forming a plurality of transverse overlaps having a nonlinear yield behavior; and securing means coupling said sheet material to said insulation; whereby a shielded cable is provided having exceptional flexibility.
Claim 2
Dependent Claim
60 words
An electrical cable, comprising: at least one conductor; insulation encasing said at least one conductor; a sheet material comprising a continuous metallic foil having a plurality of flattened transverse folds forming a plurality of transverse overlaps having a nonlinear yield behavior; and securing means coupling said sheet material to said insulation; whereby a shielded cable is provided having exceptional flexibility.
Claim 3
Dependent Claim
35 words
An electrical cable as in claim 1 wherein said transverse folds of said sheet material form a plurality of pairs of faces with an interior angle, said interior angle being not more than three degrees.
Claim 4
Dependent Claim
26 words
A cable as in claim 2 wherein said plurality of transverse folds of said sheet material occur regularly over the longitudinal length of said sheet material.
Claim 5
Dependent Claim
41 words
A cable as in claim 2 wherein the amount of said transverse overlap of each of said plurality of transverse folds of said sheet material is less than one-half of the distance between successive ones of said plurality of transverse folds.
Claim 6
Dependent Claim
41 words
A cable as in claim 3 wherein said amount of said transverse overlap of each of said plurality of transverse folds of said sheet material is less than one-third of the distance between successive ones of said plurality of transverse folds.
Claim 7
Dependent Claim
25 words
A cable as in claim 1 wherein said sheet material has a longitudinal extension of from 15 percent to 100 percent of its non-extended length.
Claim 8
Dependent Claim
31 words
A cable as in claim 2 wherein the amount of said transverse overlap of each of said plurality of transverse folds of said sheet material is not more than 35 mils.
Claim 9
Dependent Claim
25 words
A cable as in claim 6 wherein the thickness of said continuous metallic foil of said sheet material is between one-half mil and two mils.
Claim 10
Dependent Claim
29 words
A cable as in claim 6 wherein said continuous metallic foil of said sheet material is constructed from a material selected from the group consisting of copper and aluminum.
Claim 11
Dependent Claim
22 words
A cable as in claim 9 wherein said plurality of transverse folds of said sheet material occur approximately 15 folds per inch.
Claim 12
Dependent Claim
21 words
A cable as in claim 1 wherein said securing means comprises an adhesive for adhering said sheet material to said insulation.
Claim 13
Dependent Claim
17 words
A cable as in claim 1 in which said at one conductor is a plurality of conductors.
Claim 14
Dependent Claim
19 words
A cable as in claim 12 wherein said plurality of conductors lie substantially longitudinally parallel in a single plane.
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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) | 1988-08-05 | 1989-02-04 | 1989-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-05 | 1993-02-04 | 1993-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-05 | 1997-02-04 | 1997-08-06 | $7700.00 | Window Closed / Lapsed |