GB946801A - Improvements in or relating to winches - Google Patents

Abstract

946,801. Guiding cable on to winch drums. ELLIOTT & GARROOD Ltd., and J. W. WICKINS. July 27, 1962 [April 28, 1961], No. 15534/61. Heading B8B. A cable guide for a winch drum comprises a carriage movable to and fro through an adjustable variable speed gear set according to the size of the cable being wound. In one example for a ship's winch having two winch drums 12, 13, Fig. 1, on a common shaft 14, the two carriages 22, 23 are moved by a common rack and pinion 27, 28 driven through a variable speed hydraulic drive comprising an hydraulic pump 35 with a variable output and driving a motor 31 connected to the pinion 28. The pump 35 is of the piston type with an adjustable tilt swash plate controlled by a handle 38. The pump 35 is driven from the drum shaft 14 through pinions 36, 37. Limit switches 39, 41 automatically reverse the flow at the end of each stroke of the carriage. In a modification the carriages 22, 23, Fig. 2, are driven independently by separate rack and pinion devices 27, 28, 42, 43 each having a separate variable speed hydraulic drives 31, 35, 45, 47. In this example the pumps 35, 47 are individually driven through pinions 36 engaging gear rings 36 on the drums. Pairs of limit switches 40, 41 and 39, 49 control the carriages independently so that one or other may be disconnected from the drive.