Electricity: conductors and insulators – Conduits – cables or conductors – Conductor structure
Patent
1993-07-08
1995-05-23
Nimmo, Morris H.
Electricity: conductors and insulators
Conduits, cables or conductors
Conductor structure
174 42, 1741281, 57 15, 57215, 57219, 57314, H01B 508, D02G 336, D07B 106
Patent
active
054183332
ABSTRACT:
A method of manufacture and a resultant cable structure of elliptical stranded cable which optimizes the use of existing conventional stranding machines. In accordance with the present invention, one or more layers of shaped, non-circular, wires are interposed to provide support between the inner core of substantially round wires each having essentially the same diameter and the outer layer of round wires of different diameters, which outer layer includes round wires of different diameters which are arranged to provide the minor and major axes of the elliptical cable. The shaped wires are preferably trapezoidal in shape. Alternatively, the shaped wires may be arcuately shaped elliptical wires subtending an angle determined by dividing 360.degree. by the number of shaped wires (for example, 30.degree. for a twelve wire layer) and having an aspect ratio (ratio of major axis X dimension to minor axis Y dimension) sufficient to provide support between the inner core and outer layer of round wires. As a result of the use of such wires, the elliptical cable can be made by using the smallest capacity machine for a given size of cable, thereby optimizing the use of such machinery and minimizing the time spent in stranding.
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Nimmo Morris H.
Southwire Company
Tate Stanley L.
Wallis, Jr. James W.
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