The Mechanical Handling and Storing of Material

258 THE MECHANICAL HANDLING OF MATERIAL of 1,000 tons of ore. The haulage rope is elevated above the track, and the trucks ascend a gentle incline as shown on the right-hand side of the illustration; they then negotiate a curve, at the end of which they land on the top level of the ore pocket. The trucks then pass through this building and descend empty on the Figs. 374 and 375. Driving Gear for Rope Haulage Plant. other side to the bottom of the mine as shown. Fig. 379 illustrates three of the trucks on the haulage rope above the ore pockets, the first one being at the point of discharging. It will be seen from this illustration that a number of trucks are coupled together, whilst the two ends of the train so formed are clamped at both ends to the haulage rope. This is for the purpose of preventing the running forward or backward when negotiating inclines; that is to say, if the train goes up hill the front chain will be Figs. 376 and 377. Automatic Self-Unloading Trucks for Rope Haulage Plant. tight, and if it goes down hill the back chain will be tight. Two of the trippers, c, before mentioned, are shown in this illustration. The bar screens above the ore pockets are for the purpose of letting small material through, whilst the large pieces can be fed on to a grinding machine and reduced. Fig. 380 shows another view of the same, with an approaching train and a number of trippers c, any one of which can be made to engage,