Method of making flexible tubular guide sheaths for coaxial push-pull actuator cables and cable sheaths produced thereby

摘要

A push-pull cable sheath is provided by swaging a plurality of round wires against a central cylindrical mandrel and circumferentially against each other so as to flatten their mutually abutting surfaces and to arcuately curve their inside surfaces in conformity with the mandrel. The abutting surfaces are radial and the outside wire surfaces are also curved. By starting with wires that are round, the resultant elements of the tubular array of sheath wall elements thus formed on the mandrel, though slightly wedge-shaped in cross section and tapered in width, approximate a square with rounded corners. The swaged wires are compressively wrapped with binder wire. This configuration is found to provide unique advantages in terms of low cost, flexibility and cable durability. IMAGE