Method of making a flexible signal transmission cable for an aerodynamic body

Abstract

Abstract A flexible electrical cable for transmitting control signals between a control station and a rapidly moving aerodynamic body includes at least two parallel enamel-insulated conductor wires cemented together in parallel relation and extending centrally through a tension member formed by a large number of thin individual filaments, and further includes a covering closely embracing the wires and the tension member and comprising superposed layers wound around the tension member in opposite respective angular directions. The conductor wires are high purity electrolytic copper having an elongation equal to or greater than 24 percent and, in the bare condition, a diameter of 0.07 mm. The tension member comprises a plurality of parallel filament strands, of 14 Mu diameter, or a polyester fiber having an elongation of substantially 7 percent to 8 percent. The covering layers comprise natural silk having a composition of 4 X 13/15 den. In producing the cable, the conductor wires, which are separately insulated in an enameling operation, are cemented together in parallel relation. The tension member filament strands are presorted and fed to a spinning device along with the parallel conductor wires. The tension member is covered, in two successive spinning operations, having the same spinning angle but different directions of rotation. The conductor wires are fed to the spinning device under a braking force of 40 g. The apparatus includes two serially arranged wire spinning devices, the first of which has a fixed spindle provided with an axially bore therethrough and a guide plate arranged close to the spinning head. The guide plate has a central opening for the conductor wires and plural openings for the tension member filament strands, these openings being arranged in a circle concentric with the central opening and at angular interval of 120*.

Inventors

• 👤 Werner Heinzmann
• 👤 Siegfried Pfahl

Bibliographic Details