Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1984-06-14
1986-12-30
Lee, John
Electricity: conductors and insulators
Feedthrough or bushing
Compression
174 40R, 174 41, 174 70R, 174108, G02B 644
Patent
active
046325069
ABSTRACT:
An electric conductor suitable for use in an overhead electrical and optical transmission system comprises a layer or layers of helically wound wires, at least one elongate compartment within and extending throughout the length of the conductor and, loosely housed in the elongate compartment, at least one optical fibre ribbon structure comprising a plurality of optical fibres and flexible elongate reinforcing elements of resilient material arranged side by side and embedded in an elongate body of plastics material, each resilient reinforcing element being set in such a form that the ribbon structure follows a path of smoothly curved undulations whose axes of curvature lie parallel to one another and normal to the longitudinal axis of the ribbon structure. If, when the conductor is installed or in service, the undulating ribbon structure is subjected to a tensile force, the ribbon structure will straighten in a lengthwise direction against the action of the undulating resilient reinforcing elements thereby reducing the tensile force otherwise applied to the optical fibres and, when the tensile force is removed, the ribbon structure will return towards its original undulating form.
REFERENCES:
patent: 4078853 (1978-03-01), Kempf et al.
patent: 4178069 (1979-12-01), Andersen et al.
patent: 4188088 (1980-02-01), Andersen et al.
patent: 4199225 (1980-04-01), Slaughter et al.
patent: 4359598 (1982-11-01), Dey et al.
patent: 4372792 (1983-02-01), Dey et al.
patent: 4416508 (1983-11-01), Dey et al.
Igarashi et al, "Composite Fiber-Optic Overhead Ground Wire, " Proc. of 29th Int. Wire & Cable Symp., Cherry Hill, N.J., Nov. 1980, pp. 312-321.
BICC Public Limited Company
Lee John
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