Pulp-insulated conductor cable

Details Pulp-insulated conductor cable Pulp-insulated conductor cable

1981-10-27

1984-01-10

Kucia, R. R.

Electricity: conductors and insulators

Conduits, cables or conductors

Insulated

162106, 174113C, 174122R, 174124R, H01B 348

Patent

active

044254741

ABSTRACT:
A cable of this invention includes a number of pulp-insulated conductor pairs per unit of cable cross-sectional area which is substantially greater than in prior art cables. Each pulp-insulated conductor includes a metallic conductor enclosed in a composite insulation cover which has a controlled dielectric constant and a controlled adhesion of the cover to the conductor. The composite cover comprises a pulpous material and a layer of adhesive material which is interposed between the conductor and the pulpous material. The layer of the adhesive material bonds the pulpous material to the conductor and allows a reduced thickness of pulpous material without degrading the transmission characteristics of the cable. Also, the mechanical integrity of the insulation cover permits the moisture content of the pulpous material to be reduced and the density increased over that achieved in prior art pulp-insulated conductors without causing bare spots in the insulation. The changes in moisture content and density reduce the compressibility of the insulation. This is of help in maintaining a suitable mutual capacitance for the cable as well as allowing increased packing of conductor pairs without displacing insulation.

REFERENCES:
patent: 1615422 (1927-01-01), Walker et al.
patent: 2051423 (1936-08-01), Schacht
patent: 2187391 (1940-01-01), Borgeson
patent: 2440802 (1948-05-01), Krogel
patent: 3917901 (1975-11-01), Jones
patent: 3985951 (1976-10-01), Harris
patent: 3986253 (1976-10-01), Harris
patent: 4058669 (1977-11-01), Nutt et al.
patent: 4113534 (1978-09-01), Pound et al.
patent: 4125645 (1978-11-01), Jukes et al.
patent: 4183692 (1980-01-01), Durr
patent: 4218285 (1980-08-01), Durr et al.
Windeler, A. S., "Polyethylene-Insulated Telephone Cable," Nov. 1955 pp. 1-12 relied on.
Britz & Kleing, "Manufacturing Pulp Cable", Western Electric Engineer, Jul.-Oct. 1971 at pp. 86-94.

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