Conductor strand formed of solid wires and method for making the

Details Conductor strand formed of solid wires and method for making the Conductor strand formed of solid wires and method for making the

1983-02-16

1984-09-11

Tolin, G. P.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

57 13, 57 5852, 57213, 174130, H01B 700, H01B 508, H01B 1300

Patent

active

044711611

ABSTRACT:
A conductor strand 12 for an electric cable 10 is disclosed. The conductor strand includes a solid first wire 16 having a longitudinal axis A.sub.1, an inner layer of six solid wires 20 twisted helically about the first wire and an outer layer 24 formed of two different diameter wires. The outer layer includes six third wires 26 spaced circumferentially one from the other leaving a gap G therebetween. Disposed in each gap is a fourth wire 28 having a diameter which lies in a range of sixty-eight percent to seventy-eight percent of the diameter of the third wire. A method for making the cable is disclosed which includes the steps of helically twisting the inner layer about the first wire with a lay greater than the lay of the finished conductor, twisting the outer layer of wires about the inner layer of wire with that greater lay, and twisting the outer and inner wires about the first wire to reduce the lay to the lay of the finished conductor strand.

REFERENCES:
patent: 2098163 (1937-11-01), Reed
patent: 2509894 (1950-05-01), Toulmin, Jr. et al.
patent: 3167903 (1965-02-01), Peterson et al.
patent: 3934395 (1976-01-01), Vryland
patent: 3945182 (1976-03-01), Dover et al.
patent: 4275262 (1981-06-01), Sellars
patent: 4311001 (1982-01-01), Glushko et al.
patent: 4349694 (1982-09-01), Vives
Bellino, Robert A.; "How to Select a Multiconductor Cable"; Insulation, Dec., 1967, pp. 64-70.

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