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US 4,473,995 AGranted
Concentric compressed double twist stranded cable
AssigneeSouthwire Company
InventorBobby C. Gentry
Life of this patent
Estimating the term…
Abstract
A process for the manufacture of concentric compressed or compacted stranded conductors at high speed on double-twist bunching machinery while eliminating loose strand, strand crossovers, and spiral propensity of the finished product; and the product thereof.
Claims9
A method of producing concentric compressed double twist stranded cable comprising the steps of:
- (a) reducing the diameters of each wire of a first group of individual wires;
- (b) guiding said first group of wires onto the outer surface of a core wire;
- and
- (c) compressing said first group of wires into a concentric first layer on said core wire to form a seven wire core.
1 more element
A method of producing concentric compressed double twist stranded cable comprising the steps of:
- (a) causing the diameter of each wire of a first group of individual wires to conform to the following equation:
- ##EQU6## where D.sub.2 is the diameter of each wire of said first group of wires and D.sub.c is the maximum diameter of a seven wire core to be formed from said first group of wires;
- (b) guiding said first group of wires onto the outer surface of a core wire;
- (c) compressing said first group of wires into a concentric first layer on said core wire to form a seven wire core;
- (d) altering the diameters of each wire of a second group of individual wires;
- (e) guiding said second group of wires onto the outer surface of said seven wire core;
- and
- (f) compressing said second group of wires into a concentric second layer on said first layer to form a 19-wire cable.
5 more elements
Dependencies are inferred from the claim text.