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AssigneeGeneral Cable Industries, Inc.
InventorsWilliam Jacob Brorein, Jeffrey Alan Poulsen, Timothy Berelsman, LaVern P. Rutkoski
Estimating the term…
A pre-twisted cable pair and a method for processing such pairs into an electrical cable having improved electrical and mechanical properties is disclosed. At least one insulated wire for transmitting electrical signals is pre-twisted prior to pairing with another insulated wire. As the pre-twisted wires are paired by a conventional double-twist machine which imparts back-twist, the detrimental electrical effects caused by irregularities in the individual wires are cycled over a very short distance, resulting in a cable pair having lower structural return loss, near-end crosstalk, and insertion loss than wires paired without any pre-twist. These pre-twisted wires may be united into a jacketed electrical cable by a continuous-extrusion jacketing process in which an optimal dielectric constant is maintained around each individual cable pair. This is made possible due to a unique die and tip configuration which provides ridges to space the pairs apart and provide optimum air dielectric, but prevents jacketing compound on the interior of the resulting electrical cable jacket from joining to isolate each individual cable pair during the extrusion process. The resultant electrical cable has superior electrical and mechanical properties when compared to similar electrical cables fabricated by conventional techniques.
An individually twisted balanced cable pair suitable for long line data transmission, comprising:
An individually twisted balanced cable pair suitable for long line data transmission, comprising:
An individually twisted balanced cable pair suitable for long line data transmission, comprising:
An individually twisted balanced cable pair suitable for long line data transmission, comprising:
An individually twisted balanced cable pair suitable for long line data transmission, comprising:
An individually twisted balanced cable pair suitable for long line data transmission, comprising:
A multiple-paired balanced cable suitable for long line data transmission, having a plurality of individually-twisted cable pairs, each said individually-twisted cable pairs comprising a first insulated wire that is pre-twisted around its own longitudinal axis, a second insulated wire that is not pre-twisted, wherein said first and second insulated wires are twisted together, wherein said individually-twisted cable pairs are configured in parallel runs with respect to the axis of said multiple-paired cable.
A multiple-paired balanced cable suitable for long line data transmission having a plurality of individually-twisted cable pairs, each of said individually-twisted cable pairs comprising a first insulated wire that is pre-twisted around its own longitudinal axis, a second insulated wire that is not pre-twisted, wherein said first and second insulated wires are twisted together, wherein said individually-twisted cable pairs are configured in oscillating spiral runs in which said cable pairs sequentially rotate clockwise, then rotate counterclockwise, per each cycle of oscillation along the axis of said multiple-paired cable.
Dependencies are inferred from the claim text.