Abstract:
A differential signal transmission cable includes: an insulating electric wire having a pair of conductive wires and an insulating layer covering the pair of conductive wires; a shield tape wound around an outer periphery of the insulating electric wire; a first tape wound around an outer periphery of the shield tape and having a first resin covering layer; and a second tape wound around an outer periphery of the first tape and having a second covering layer. The second covering layer is made of a high softening point material having a softening point that is higher than a softening point of the first resin covering layer.
Abstract:
A protective cable armor for cable having tensile stiffness and providing structural protection from invasion by foreign objects. The armor comprises a substantially planar sheet member having a length and a width and an intermittent corrugation pattern disposed therein. The intermittent corrugation pattern comprises at least one land extending across the width of the sheet member and having a defined land width. The intermittent corrugation pattern further comprises at least one, groove extending across the width of the sheet member and having a defined groove width, where the defined land width differs from the defined groove width. The land is disposed adjacent the groove. The sheet member can also be disposed in a substantially tubular form.
Abstract:
A unitized marine umbilical cable carrying any number or combination of conventional elements such as hoses and electrical cables. A center stress member disposed along the axis of the marine umbilical cable is capable of supporting an underwater device such as a diving bell should the primary down line break. Cylindrically surrounding the stress member is a compression extrusion of a high strength highly resilient elastomer around which are helically cabled various conventional elements. Within the interstices between the high strength elastomer and the helically cabled elements is a resilient fill material. The resilient fill material and high strength highly resilient, low durometer elastomer serve as a radial shock absorber against tensional impact upon the umbilical or radial forces thereupon.
Abstract:
An electromechanical cable is adapted for deployment along a generally straight path and when thus deployed to be substantially free of torsional reactions resulting from changes in tensile stress in the longitudinal direction of the cable. The cable includes a plurality of strain members arranged in an annular configuration. When the cable lies straight and untwisted the strain members are also straight, parallel to the longitudinal axis of the cable and parallel to each other. The strain members are loosely confined within the cable structure so that when the cable is subsequently twisted they are free to move into helical positions relative to the axis of the cable.The cable is first wound into a coil and concurrently pretwisted about its own axis by approximately 360.degree. for each loop of the coil. After being transported to the deployment site, the cable is pulled off the coil without relative rotation between the delivered end of the cable and the coil, so that the pretwist of the cable is relieved. The cable is then ready to carry a varying longitudinal tensile load without inducing significant torque or twisting action.In one form of the invention the strain members are sandwiched between a sheath and an insulated core. In another form of the invention the strain members are disposed centrally of the cable and constitute a part of its inner core.
Abstract:
A two-core cable includes two coated wires and a metal tape. Each of the two coated wires includes a conductor and an insulating layer that covers an outer surface of the conductor, and the metal tape is configured to collectively cover outer surfaces of the two coated wires. The metal tape has a structure in which a resin layer and a metal layer are stacked, and the resin layer is located towards the two coated wires relative to the metal layer.
Abstract:
An armored cable having a plurality of individually insulated conductors and force-resisting members formed with an arcuate cross-sectional shape which substantially conforms to the curvature of the surface on which it is mounted. Opposite surfaces of each force-resisting member in the cable have different widths in cross-section to provide the desired enclosure of the underlying insulation on a conductor after the formation of the arcuate bend in the cable.