A method for producing a self-closing foil sheathing (14) wound onto at least one line (10) of a cable arrangement (12) includes providing an elastically deformable foil strip (16) which, in a load-free or bare state, is bent in a plane of the foil strip (16). The foil strip (16) is wound onto the line (10) in order to form the foil sheathing (14) which surrounds the line (10). The foil strip (16) during winding onto the line (10) is elastically deformed radially to the outside and in this way is subjected to radial loading in the direction of the line (10).

Systems and methods for tamper proof cables are described herein. In certain implementations, a system includes one or more pieces of equipment and one or more tamper proof cables connecting the equipment within a network. A tamper proof cable includes a core that provides a transmission medium through the cable; an insulator enveloping the core; a first conductive braid encircling the insulator; a dielectric enveloping the first conductive braid; and a second conductive braid encircling the dielectric, the first and second conductive braids, and the dielectric forming a capacitor. The system includes one or more detectors, each detector coupled to the tamper proof cables, each detector and an associated capacitor forming a tuned circuit, the detectors providing a signal when an associated portion of the tamper proof cables is tampered with; a monitor coupled to the detectors that notifies an infrastructure management system when the signal is received.

A reinforced superconducting wire (1a) has a superconducting core strand (2) and a first cladding with a multitude of reinforcing strands (3). The reinforcing strands (3) are arranged around the circumferential surface of the superconducting core strand (2) in a non-crossing manner and are in contact with the core strand (2). The wire has a reinforcement for enhancing its mechanical properties against external stresses and for preventing diameter expansion during heat treatment. In addition to other advantages, such superconducting wire can be produced with an easy and low-cost production process.

A communications cable having a plurality of twisted pairs of conductors and various embodiments of a metal foil tapes between the twisted pairs and a cable jacket is disclosed. In some embodiments, a metal foil tape includes a discontinuous metal layer and a polymer layer bonded to the metal layer. Portions of the metal layer and the polymer layer are deformed to form a plurality of dimples, the dimples forming air gaps between the polymer layer and the cable core or a barrier layer if used. The air gaps lower the overall dielectric constant between the metal layer and the cable core, thereby lowering the alien capacitance of the communications cable.

A production method for a headline sonar cable characterized by steps of: a. providing a first strength member (14); b. coupling to strength member (14) a conductor (122); c. forming a layer of polymeric material about the combination of strength member (14) and conductor (122) while ensuring that the conductor remains slack; d. forming a flow shield around the layer of polymeric material, thus forming an elongatable internally located conductive structure; and e. braiding a strength-member jacket layer (52) of polymeric material around the elongatable internally located conductive structure while ensuring that the conductor is slack when surrounded by the jacket layer (52).

For another embodiment, an optical fibre is wrapped around the exterior of the layer of polymeric material within which is enclosed a braided conductor formed about the first strength member (14). Other embodiments employ further thermo-plastic layers and further sheaths and further conductors.

A method for manufacturing an electrical cable includes providing at least one core including an electrical conductor, and arranging at least one copper sheath around the at least one core. The arranging of the copper sheath includes providing at least one foil of copper having two opposite first edges; bending the foil of copper around the core until the first edges of the foil of copper are contacted with each other; welding the first edges of the foil of copper to each other to form a corresponding solder jointwelded joint; and deposing a copper coating on at least portions of the surface of the foil of copper at the welded joint. The deposing the copper coating is carried out by means of a thermal spray process.

An electrically conductive yarn including an elastomeric monofilament and an electrically conductive thread crocheted about the elastomeric monofilament. A method of forming an electrically conductive fabric including providing an elastic monofilament, enclosing the elastic monofilament with a conductive thread by crocheting, thereby producing a conductive elastic yarn and forming an electrically conductive fabric from the conductive elastic yarn and an electrically conductive fabric formed thereby.

An electrically conductive yarn including an elastomeric monofilament and an electrically conductive thread crocheted about the elastomeric monofilament. A method of forming an electrically conductive fabric including providing an elastic monofilament, enclosing the elastic monofilament with a conductive thread by crocheting, thereby producing a conductive elastic yarn and forming an electrically conductive fabric from the conductive elastic yarn and an electrically conductive fabric formed thereby.

An electromagnetic shield component that includes a first tube that has conductivity; a flexible shield; and a second tube externally fitted to the first tube with the flexible shield disposed between the first tube and the second tube, wherein: a protrusion is provided on an inner circumferential surface of the second tube over an entire length of the inner circumferential surface in a circumferential direction, the protrusion protruding toward the flexible shield and holding the flexible shield in a pressed state between the first tube and the second tube, and an outer circumferential surface of the protrusion is smoother than an outer circumferential surface of a portion of the second tube where the protrusion is not formed.

An electromagnetic shield component that includes a first tube that has conductivity; a flexible shield; and a second tube externally fitted to the first tube with the flexible shield disposed between the first tube and the second tube, wherein: a protrusion is provided on an inner circumferential surface of the second tube over an entire length of the inner circumferential surface in a circumferential direction, the protrusion protruding toward the flexible shield and holding the flexible shield in a pressed state between the first tube and the second tube, and an outer circumferential surface of the protrusion is smoother than an outer circumferential surface of a portion of the second tube where the protrusion is not formed.