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US 4,227,041 AGranted
Flat type feeder cable
AssigneeThe Fujikura Cable Works, Ltd.
InventorsHiroshi Den, Masao Shimizu, Yoshioki Shingo
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AssigneeThe Fujikura Cable Works, Ltd.
InventorsHiroshi Den, Masao Shimizu, Yoshioki Shingo
Estimating the term…
A flat type feeder cable comprising an even number of stranded conductors and an outer jacket made of a flexible material wholly covering the stranded conductors, each of said stranded conductors being composed of a plurality of insulated cores stranded together, and wherein an equal number of the stranded conductors are disposed in a symmetrical relationship, characterized in that the direction of lay of each of the stranded conductors of half the number is right-hand while the direction of lay of each of the remaining stranded conductors is left-hand, and each of the plurality of insulated cores constituting each stranded conductor has one twist by one pitch of the stranding of the stranded conductor, said twist having the same direction as the direction of the stranding of the stranded conductor. The flat type feeder cable has excellent bending characteristic (flexibility), torsion resistance, compactness, resiliency and installing workability, and is useful espeically as a feeder cable for moving constructions such as elevators travelling in a limited space.
A flat type feeder cable useful for supplying electricity to an elevator comprising an even number of at least four stranded conductors with their respective axes arranged in a line and in a substantially coplanar relationship and an outer jacket made of a flexible material completely covering the stranded conductors, each of said stranded conductors being composed of a plurality of insulated cores stranded together, and wherein an equal number of the stranded conductors are disposed in a positionally symmetrical relationship with respect to the lateral axis of symmetry on a cross section of the cable, the direction of lay of each of half the number of stranded conductors is right-hand while the direction of lay of each of the remaining stranded conductors is left-hand, and each of the plurality of insulated cores constituting each stranded conductor has one twist per one pitch of the stranding of the stranded conductor, said twist having the same direction as the direction of the stranding of the stranded conductor.
Dependencies are inferred from the claim text.