Abstract: A method of and an apparatus for making twisted electrical cable, such as 600 volt secondary distribution cable, and the twisted cable product are disclosed. The apparatus comprises a first plurality of stationary payoff reels each wound with a length of bare wire conductor. The conductors are simultaneously payed off the reels to a pay out accumulator for accumulating a portion of the conductors during replacement of spent pay out reels. At least one extrusion process arranged downstream of the accumulator applies a plastic insulation material to a respective conductor as it passes through its respective extrusion process. A cooling and/or curing trough through which water is flowed cools and/or cures the plastic insulation. A take-up accumulator arranged downstream of the cooling and/or curing trough accumulates a portion of each insulated conductor during changeover of the take-up reel arranged downstream of the take-up accumulator.
May 19, 1999
Date of Patent:
August 13, 2002
Bobby C. Gentry, Jerry M. Hesterlee, Clinton E. Watkins, James H. Sullivan
Abstract: A production unit for twisted cable is disclosed that facilitates the supply and removal of fixed length cables, thereby contributing to improved workability and automation compatibility. A plurality of pairs of relatively rotatable opposed cable clamps are provided with one cable clamp of each pair provided at one end of the fixed length cables and the other of each pair of cable clamps provided at the other end. Each pair of clamps is intermittently moved forward in a direction transverse to the opposed direction in which the cables extend. Each pair of cable clamps sequentially circulate, and the supply and removal operation of fixed length cables to and from the pairs of clamps are conducted respectively at predetermined positions by stations provided in the circulating route, by which it becomes possible to carry out the supply and removal of fixed length cables to continuously repeat the twisting operation.
Abstract: A metallic cable (10) suitable for reinforcing elastomeric articles comprises two or more substantially identical helical formed bare filaments (11,12,13) nested together and secured to one another by axially spaced apart applications of an adhesive substance.
Abstract: A line tie assembly and various methods of installing a line tie to a conductor cable are described herein. The line tie is comprised of helical end portions and a generally undeformed, non-helical central portion therebetween. The helical end portions are adapted for circumferential gripping engagement with the conductor cable. The line tie is universal such that it will accommodate various size insulators and is adaptable to both "top tie" and "side tie" arrangements in single-support and double-support constructions. According to one set of installation methods, individual components of the line tie are spread apart along the non-helical central portions and positioned over an insulator. Another set of installation methods use the insulator as a mandrel for bending the line tie into a generally U-shaped configuration.
Abstract: The invention consists of an improvement in the art of arresting a moving body through the use of steel cables that elongate to absorb the kinetic energy of the body. The improvement comprises a sleeve which surrounds the cables, protecting them from chafing and providing a failsafe energy absorbing system should the cables fail.
December 28, 1979
Date of Patent:
December 8, 1981
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration