Towed acoustic array

Details Towed acoustic array Towed acoustic array

1993-03-08

1994-11-29

Swinehart, Edwin L.

Ships

Towing or pushing

Cable fairing

114244, F15D 110

Patent

active

053679717

ABSTRACT:
A tow cable includes a high density, high damping core of a material such as lead, surrounded by a layer of helically wrapped or braided strength fibers of a material such as steel, or alternatively, of aramid fibers. Over this is provided a layer of a resilient, deformable thermoplastic material such as polyurethane, to provide for movement of the subsequent data-bearer layer under strain, so that no strain is applied to the data-bearer themselves. Around this layer is provided a layer of helically wrapped (or braided) power and data bearers, the bearers including coaxial cables, twisted pairs, and fiber optic bearers. To ensure water-blocking, this layer may be enclosed in an extrusion of thermoplastic material, such as polyurethane. Around this is wrapped or braided a layer of protective fiber, of material such as steel or aramid fiber, and over this, in a roughly trochoidal cross-section, is extruded an outer layer of thermoplastic material, such as polyurethane. The trochoidal cross section is twisted along the length of the cable. This twisting of the trochoidal section causes the ridges to effectively rotate as the cable moves through water and therefore minimizes vortex shedding and cable strumming.

REFERENCES:
patent: 3344888 (1967-10-01), Connelly et al.
patent: 3859949 (1975-01-01), Toussaint et al.
patent: 4081602 (1978-03-01), Paniri et al.
patent: 5214244 (1993-05-01), Cummings et al.

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