The Mechanical Handling and Storing of Material

292 THE MECHANICAL HANDLING OF MATERIAL battery of rollers on entering the station, is then led over a pair of guide sheaves on to the terminal drum which has two grooves, and from this the rope passes over an inter- mediate drum and finally on to an adjustable drum for tightening the rope. A weight is attached for this purpose, which hangs in a pit together with the weights which keep the carrying ropes taut. The second and lower section is driven from the same upright spindle which carries the end drum of the upper section. This drum has also two grooves and a similar intermediate drum being intercepted as before, to afford a better grip. 1 he haulage rope of the lower section leaves a station after also passing a battery of rollers. Figs. 422 and 423. Elevation and Plan of Lower Terminal of Ropeway at a Chilian Copper Mine. In smaller installations the same haulage rope runs through the station without interruption. An angle station for a slight diversion of the line is shown in diagram in Figs. 428 and 429. It is automatic, that is, no attendant would be necessary, as the buckets will transfer themselves from one rail rope to the other on shunt rails, remaining all the while coupled to the haulage rope which is guided gently round the angle by four rollers on each ; the rail ropes terminate at this point, and are kept taut by weights. A typical example of one form of bucket is shown in Fig. 430. The bucket itself is made as usual of steel sheets with the top edge strengthened, and is suspended from a flat iron frame. The bucket is arranged to tip its contents as soon as the lever, shown