Coaxial cable and process and apparatus for forming

Details Coaxial cable and process and apparatus for forming Coaxial cable and process and apparatus for forming

H - Electricity

01

B

H01B 13/016 (2006.01) H01B 11/18 (2006.01) H01R 13/646 (2006.01) H01R 43/28 (2006.01)

Patent

CA 2325208

A method of forming an end of a coaxial cable to prevent the dielectric from receding within the outer conductor is disclosed, together with a cable formed by the method and an apparatus for carrying the method out. The cable comprises a central wire conductor, a dielectric formed of several layers of PTFE tape, and an outer conductor of metal braid. The outer conductor is cut away to expose a substantial length of the dielectric. A shroud is slid over the outer conductor. The shroud carries a spacer lip that abuts the end of the outer conductor, while leaving a gap between the lip and the exposed dielectric. The end of the cable is then inserted into a blind bore in a heated tool. The blind bore fits snugly round the exposed dielectric, but is appreciably shorter. The tool is forced onto the cable, compressing the dielectric, until the tool meets the spacer lip. The heat of the tool fuses the layers of the PTFE together, and allows the PTFE to flow, forming a bead in the gap inside the spacer lip. The bead engages the end of the outer conductor, preventing the dielectric from receding within the conductor.

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