GB1364699A - Cable winch - Google Patents

Abstract

1364699 Winches FAIREY WINCHES Ltd 9 Feb 1973 [19 Nov 1971] 53927/71 Heading B8B [Also in Division F2] A cable winch comprises two circumferentially grooved drums 2 and 3 around which the cable c passes in successive grooves, each end turn of cable on the winch being selectively clampable in an end groove at a radius greater than that of the earlier grooves, to apply tension to the cable prior to it leaving the winch. Each said end groove is formed by a tapered wall 31b integral with the drum 4 and a taper walled clamping ring 33b splined for rotation with the drum but movable axially of the drum through compression springs 34b, a stop plate 35b axially movable on the drum but rotatable therewith, and a collar 36b non-rotatable but slidable along the drum to engage or disengage the clamping ring 33b. The collars at opposite ends of the drum are interconnected so that as one clamping ring is engaged, the other is disengaged. The end turn of cable is held in the end groove against the clamping action tending to squeeze the cable radially out of the groove, by one or more idler rollers 41b. Cable being wound in by the winch is fed through a guide 24 into a freely rotatable storage container 44, whereby it is driven by the cable which forms coils therein. The two drums are driven in unison by worm or chain gearing. The clamping device for tensioning cable being payed out from the winch, may be formed on the other drum 2 and the cable wound between the drums accordingly.