GB329172A - Improvements in and relating to aerial cableways - Google Patents

Abstract

329,172. Henderson & Co., Ltd., J. M., and Medd, R. T. May 18, 1929. Overhead transporters. -An aerial cableway of the kind having a supporting cable, a traversing rope and a hoisting rope, has the hoisting rope passed over a jockey pulley which is adjusted in position .by a motor controlled by changes in tension of the hoisting rope so that the skip travels horizontally independently of the load. The hoisting rope e is anchored to a pulley block i on the trolly c and is reeved between the pulley block i and fall block i<1> and passes round a pulley i<2> on the mast a, a jockey pulley j and a pulley k to the hoisting drum of winch g. The jockey pulley j is connected by an adjusting rope l passing round a pulley m to the drum of an adjusting winch n driven by a motor q. The spindle o<2> of the pulley m is mounted in bearings o, the spindle bearing against compression springs o'. The spindle is connected to one arm of a pivoted bent lever p, the other arm of which is adapted to engage contacts or switches in the control circuit of the motor q. In operation, when the skip is loaded, the increase in tension in the hoisting rope and therefore in the adjusting rope l moves the pulley m and operates the bent lever p to complete the control circuit of the motor q of the adjusting winch n so that sufficiemt hoisting rope is taken up to compensate for the increased sag of the supporting cable. The adjusting motor may be put out of action when required by a cut-out or dashpot. The control circuit of the adjusting motor may include limit switches operated by the adjusting winch and which break the circuit when the winch has coiled or uncoiled enough rope to compensate for the difference in length of the hoisting rope at the charging and discharging positions.