| 摘要 |
909,343. Cables. BONDON, L. A. April 13, 1959 [April 23, 1958], No. 12510/59. Class 36. A cable is made by laying a plurality of insulating rods or tubes 14 about at least one conductor 13 in tightly packed array, introducing the array into an outer conductive jacket 12, and reducing down the jacket so that the array is subjected to compression. Insulating tubes of circular cross-section may be used and they may be compressed to the shape shown. For communication purposes the elements may all be laid parallel; further layers may be provided with additional conductors in the interstices. The insulating elements may be of e.g. polyethylene, polytetrafluoroethylene, p.v.c., natural or synthetic rubber, and vinyl polymers and copolymers of which examples are given; they may also be of foamed material such as rubber, polyethylenes and polyurethanes, or of glass fibres impregnated with the abovementioned synthetic resins which may additionally contain silicone or silicone rubber. The tubes may be used for circulation of cooling fluids. An arrangement for assembling the cable elements using dies is briefly described. Specifications 535,743, 584,153 and 650,428 are referred to. |
