Electricity: conductors and insulators – Feedthrough or bushing – Compression
Patent
1983-10-06
1987-04-14
Sikes, William L.
Electricity: conductors and insulators
Feedthrough or bushing
Compression
350 9620, 350 9621, 350320, 350 9622, 174 70R, 174 70S, 228148, G02B 644, H02G 300, B21D 3900
Patent
active
046573437
ABSTRACT:
The strength members of the optical fibre cables to be jointed comprise inner and outer layers of high-tensile wires (9, 10; 9', 10') arranged on respective pressure-resistant tubes (5; 5'), each containing an optical fibre package (not shown). The strength members are jointed by trapping the wires between a quill (15) and a ferrule (16) pressed towards the quill. The quill (15) is of a relatively hard steel and serves to partially reinstate the pressure tube between the ends of the cables, whereas the ferrule (16) is of a relatively soft steel. For jointing of two dielectric covered elements the ferrule is subsequently encapsulated in a dielectric moulding (27). A thin-walled reinstatement tube (17) is arranged between the quill (15) and one tube (5'). The cavity in the reinstatement tube (17) is larger in diameter than the cavity in the tubes (5 and 5'). Thus, when the optical fibres are arranged to lie helically in the reinstatement tube without exceeding their minimum allowable bending radius, optical fibre slack can be absorbed in a minimum distance, and any diameter increase over optical fibre joints can be readily accommodated. Pressure tube repairs can be made with such a reinstatement tube (7- FIG. 2) arranged directly between two tubes in cases where there are no wires to join.
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Jones Stephen R.
Oldham Ronald C.
Clarke Dennis P.
Healy Brian M.
Sikes William L.
Standard Telephones and Cables Public Limited Company
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