GB933100A - - Google Patents

Abstract

933,100. Laying cables. BRITISH INSULATED CALLENDER'S CONSTRUCTION CO. Ltd. May 3, 1962 [May 4, 1961], No. 16217/61. Class 36. [Also in Groups XXVIII, XXX and XXXIII] A submarine cable or pipe line is landed from a cable ship close inshore, after laying the major portion of the cable, by passing the cable round a float supported sheave which is winched towards the shore. As shown, Fig. 2, a rotatable sheave 1, 2, 3 is supported by a detachable raft 13. The cable is paid out from the ship and round the central part 1 of the sheave, which is hauled towards the shore by a shore-mounted winch or by passing the harness round a shore sheave and back to a winch on the cable ship. When the rims 3 of the sheave ground on the beach the sheave is released from the raft and is rolled up the beach to the terminal point. The throat 1 of the sheave may be rotatable relative to the outer parts to prevent strain on the cable. The sheave may have builtin floats and the cable between the ship and the floating sheave may be supported by floats. The cable may be cut when sufficient has been paid out to reach the shore terminal and a rope attached to provide the tension necessary to complete the laying of the cable. Alternatively, the cable may be paid out until the sheave reaches the shore terminal where the cable is cut and the excess hauled inboard by the cable ship.