US3795760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical cables
Assignee: Balfour Beatty PLC
•
Filing: 1973-02-14
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Granted: 1974-03-05
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Expires: 1993-02-14
Abstract
Abstract A single wire cable conductor consists of an inner part (constituting the major proportion of the cross-sectional area of the conductor) of an aluminium alloy of the kind known as ''''nonheat-treatable'''' and having a tensile strength within a range from 155 to 463 MN/m2(10-30 tonf/in2) and an electrical conductivity within the range 26.5% to 44.2% IACS, and, bonded to the inner part, an outer part (constituting the minor proportion of the cross-sectional area of the conductor) of copper or a high conductivity copper alloy and having an electrical conductivity of at least 80% IACS. The single wire conductor may constitute the wire or one of the wires of a single or multiple wire conductor of an electric cable, such as a wiring cable, an aircraft cable or a telecommunication cable.
Inventors
- 👤 P Raw
- 👤 R Robbins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:51
CPC Classifications
H; H01; H01B; H01B9/00; B; B21; B21C; B21C23/00; B21C23/22; H01B1/00; H01B1/02; H01B1/023
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
23 words
A single wire cable conductor as claimed in claim 1, wherein the outer part constitutes approximately 25 percent by volume of the wire.
Claim 2
Dependent Claim
23 words
A single wire cable conductor as claimed in claim 1, wherein the outer part constitutes approximately 10 percent by volume of the wire.
Claim 3
Dependent Claim
27 words
A single wire cable conductor as claimed in claim 1, wherein the aluminium alloy contains sufficient manganese to give it a tensile strength within the specified range.
Claim 4
Dependent Claim
27 words
A single wire cable conductor as claimed in claim 1, wherein the aluminium alloy contains sufficient magnesium to give it a tensile strength within the specified range.
Claim 5
Dependent Claim
112 words
An electric cable comprising at least one conductor comprising at least one wire consisting of an inner part (constituting the major proportion of the cross-sectional area of the wire) of an aluminium alloy of the kind known as ''''non-heat-treatable'''' and having a tensile strength within a range from 155 to 463 MN/m2(10-30 tonf/in2) and an electrical conductivity within the range 26.5% to 44.2% IACS and, bonded to the inner part, an outer part (constituting the minor proportion of the cross-sectional area of the wire) of a metal selected from the group of metals consisting of copper and a high conductivity copper alloy and having an electrical conductivity of at least 80% IACS.
Claim 6
Dependent Claim
101 words
An electric wiring cable comprising a conductor comprising at least one wire consisting of an inner part of an aluminium alloy of the kind known as ''''non-heat-treatable'''' and having a tensilE strength within a range from 155 to 463 MN/m2(10-30 tonf/in2) and an electrical conductivity within the range 26.5% to 44.2% IACS and, bonded to the inner part, an outer part of a metal selected from the group of metals consisting of copper and a high conductivity copper alloy and having an electrical conductivity of at least 80% IACS, the outer part constituting approximately 19 percent by volume of the wire.
Claim 7
Dependent Claim
101 words
An aircraft electric cable comprising a conductor, comprising at least one wire consisting of an inner part of an aluminium alloy of the kind known as ''''non-heat-treatable'''' and having a tensile strength within a range from 155 to 463 MN/m2(10-30 tonf/in2) and an electrical conductivity within the range 26.5% to 44.2% IACS and, bonded to the inner part, an outer part of a metal selected from the group of metals consisting of copper and a high conductivity copper alloy and having an electrical conductivity of at least 80% IACS, the outer part constituting approximately 25 percent by volume of the wire.
Claim 8
Dependent Claim
110 words
A telecommunications cable comprising at least one conductor comprising at least one wire consisting of an inner part of an aluminium alloy of the kind known as ''''non-heat-treatable'''' and having a tensile strength within a range from 155 to 463 MN/m2 (10-30 tonf/in2) and an electrical conductivity within the range 26.5% to 44.2% IACS and, bonded to the inner part, an outer part of a metal selected from the group of metals consisting of copper and a high conductivity copper alloy and having an electrical conductivity of at least 80% IACS, the volume of the outer part lying in the range 10 to 15 percent by volume of the wire.
References Cited (Backward Citations)
FR1489845A
Cited
FR1582246A
Cited
US3463620A
Cited
US3513250A
Cited
US3513252A
Cited
US3513251A
Cited
US3595985A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |