Textiles: spinning – twisting – and twining – Strand structure
Patent
1977-01-05
1979-06-19
Watkins, Donald
Textiles: spinning, twisting, and twining
Strand structure
751755, 148 115R, D07B 500
Patent
active
041582837
ABSTRACT:
Titanium aluminum, non-frangible structural wire, when assembled into axially symmetric and contrahelically wrapped cable has high fatigue strength and loading linearity for uniquely high work efficiency. Dynamic stresses are moderated by more suitable mechanical, physical and dynamic properties so that stress and fatigue control are passively achieved. Structural wire is specially processed from selected titanium base alloys having high drop test tear energy, wherein new construction designs and specifications are then suitable and used during cable assembly to substantially advance work performance and increase service life.
Work characteristics are basically improved and changed by (1) adding elastic and constructional stretch, (2) materially reducing mass density, and (3) loading cable with hard and soft spring. These cable attributes translate into much higher fatigue strength, mainly by absorbing, storing and dissipating induced work loads at rapid rates.
A new construction characteristic is enlarged cores for both structural and electrical reasons wherein stress stratification, stress transfer and distribution between layers, and stress propagation and vibration are changed, wherein stretch is increased and loading dynamically counterbalanced. Internal stresses are also reduced in the interrelated process by greater component compliance.
Variably designed core and outer strand constructions including composite cable are used to increase work capacity and service life, and to reduce cost. Non-frangible, aluminum wire may be used as components in cable constructions, interchangeably with titanium wire as conductor and structural components in many cases in this invention.
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patent: 3575736 (1971-04-01), Fitzpatrick et al.
patent: 3584368 (1971-06-01), Sargent
patent: 3686041 (1972-08-01), Lee
patent: 4010046 (1977-03-01), Setzer
patent: 4067734 (1978-01-01), Curtis
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