Power cable useful in seismic testing
AssigneeHubbell Incorporated
InventorDavid H. Neuroth
Life of this patent
Estimating the term…
Abstract
A self-supporting power cable which is especially useful in seismic testing. The cable includes an outer armor layer, a pair of tensile elements located inside the armor layer, a power conveying assembly located inside the armor layer and between the tensile elements, and filler material filling the otherwise empty spaces within the armor layer. The tensile elements are advantageously formed of several concentric layers of spirally-wrapped wire strands with at least the outer layer having less than a full contingent of strands. This improves the cable's strength-to-weight ratio while providing self support. To provide transverse force resistance against the cleats of a feeding device, the outer layer of the wire ropes contact the walls of the outer armor layer.
Claims17
A power cable, the combination comprising:
- an outer armor layer having a longitudinal axis Z, orthogonal transverse axes X and Y, and a cavity defined therein having a height in the Y direction of A;
- a pair of tensile elements located in said cavity, extending along said Z axis, and spaced apart along said X axis, each of said tensile elements including
- an inner tensile member, and
- an outer tensile member, said outer tensile member including one pair of strands spirally wrapped about said inner tensile member, said strands in said pair being circumferentially spaced from one another through substantially 180.degree.,
- said outer tensile member having circumferential gaps therein between said strands, and said strands having outer edges separated by a distance substantially equal to A;
- power conveying means located in said cavity, extending along said Z axis, and positioned between said pair of tensile elements;
- and
- filler material located in said cavity and substantially filling any otherwise empty spaces therein,
- said outer armor layer having a top wall in contact with the outer edges of said strands in each of said outer tensile members, and a bottom wall in contact with the outer edges of said strands in each of said outer tensile members, said top and bottom walls extending transversely of said cavity along the X axis.
A power cable, the combination comprising:
- an outer armor layer having a longitudinal axis Z, orthogonal transverse axes X and Y, and a cavity defined therein having a height in the Y direction of A;
- a pair of tensile elements located in said cavity, extending along said Z axis, and spaced apart along said X axis, each of said tensile elements including
- an inner wire rope, and
- an outer wire rope, said outer wire rope including one pair of strands spirally wrapped about said inner wire rope, said strands in said pair being circumferentially spaced from one another through substantially 180.degree.,
- said outer wire rope having circumferential gaps therein between said strands, and said strands having outer edges separated by a distance substantially equal to A and contacting said outer armor layer;
- power conveying means located in said cavity, extending along said Z axis, and positioned between said pair of tensile elements;
- and
- filler material located in said cavity and substantially filling any otherwise empty spaces therein,
- said outer armor layer having a top wall in contact with the outer edges of said strands in each of said outer wire ropes, and a bottom wall in contact with the outer edges of said strands in each of said outer wire ropes, said top and bottom walls extending transversely of said cavity along the X axis.
Dependencies are inferred from the claim text.