B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
114/46.3
B63B 21/56 (2006.01) B63G 8/42 (2006.01)
Patent
CA 1202828
ABSTRACT OF THE DISCLOSURE A compact towing system which is adapted to be mounted on a ship for towing an underwater towed body using faired tow cable is provided herein. It includes the combination or the following inter-related elements: (a) a trucked gantry; (h) a lower saddle; (c) a winch drum; (d) a hinged boom; (e) a pivotable deflection sheave; and (f) a fairlead sheave and saddle assembly on a carriage. The invention resides in two inte-related driving mechanisms, i.e. (g) for driving the trucked gantry in synchronism with the winch drum, so that, as the trucked gantry traverses between a forward stow position and an aft full cable-out position, a zero degree fleet angle is obtained between the tow cable and the winch drum; and (h) for driving the carriage to traverse the carriage along the boom during launch and recovery in synchronism with the winch drum so that, as the cable unwinds, the carriage is driven towards the outer end of the boom, so that the fairlead sheave and saddle assembly overhangs the outer end of the boom, and so that as the cable winds, the carriage is driven towards the inner end of the boom, so that the fairlead sheave and saddle assembly lies along the boom. In this way, in operation, the cable passes from the winch drum, through a fairing training device, through the hollow boom pivot, around the deflection sheave, along the boom, through the alrlead sheave which is mounted on the driven carriage and thence to the towed body.
432535
Borden Ladner Gervais Llp
Norminton Robert S.
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