GB1491614A - Winches - Google Patents

Abstract

1491614 Winches R G GRAHAM 10 June 1975 [11 June 1974] 24749/75 Heading B8B A tail out device for controlling frictional grip of a rope on the drum of a winch comprises a feed out roller 11 driven in rotation by a gear coupling 12, 13 to the winch drum 4 and an impingement roller 17 disposed adjacent the periphery of the feed out roller 11 whereby a rope tail extending from the winch drum 4 can be frictionally engaged between the two rollers 11 and 17. The axes of the two rollers 11 and 17 are inclined upwardly and away from the substantially vertical axis of the drum 4, the gear-wheel 12 being bevelled to compensate for this divergence. The impingement roller 17 is driven from the feed out roller 11 by interengaging gears 14, 19 thereon, the rope being gripped in a space 27 formed between peripheral grooves 15, 18 on the rollers 11, 17. The impingement roller 17 is pivoted on a pin 21 for movement towards and away from the feed out roller 11, the roller 17 normally being biased towards the roller 11 by a spring 25 acting through a handle 24 incorporated with the impingement roller axle. The drive ratio between the winch drum and the feed out roller is selected such that the linear feed out from the drum is in the region between 10% less and 20% more than the linear feed into the drum. The winch drum may be manually or motor driven and the drive to the feed out roller from the winch drum may be through a belt or chain.