The Mechanical Handling and Storing of Material

598 THE MECHANICAL HANDLING OF MATERIAL consequence of this provision, the skip tips over and empties its contents as soon as the front pair of wheels reach the horizontal portion of rails c, as the back wheels remain on the straight rails a a. The dumping skip is shown to unload in its two extreme positions, the upper in full, and the lower in dotted lines. The loading shoot consists of the four parts k, r, Z, and p, and its lower portion is movable as a whole along rail w, between the points m. and to allow of the necessary adjustment to suit all condi- tions for loading. The portion p allows of a telescopic movement between points i and iv on eight rollers and guide rails o, by means of hand wheel x, to alter the reach of the loading arm. Por- tion r of the shoot is movable round swivel s, whilst / and p may likewise be moved round joint u; these movements are more particularly for the purpose of getting the shoot out of the way of the ship’s tackle when moving into position. Valve e at the extreme end of the shoot is adjustable to regulate the speed of de- livery. The main portion of the shoot k is fixed at its upper end to rails c by joint /, and at the lower end is supported by the two wheels m running on rails /z, which latter are parallel with rails c. Part r is hinged on to k by 5'. The upper end of portion t is hinged by u to the sliding blocks v. All adjustments of the loading shoot are such as to enable the operator to hold them in any position within their travel. The hauling rope runs over guide rollers 1 and 2, and also over drum 3, and is fixed to the winding drum 4. The two ropes 5, which manipulate the rails c, run over rollers 6, and are fixed to the drums 7; whilst the ropes 8, for raising and lowering the main portion of the shoot, run over rollers 9 to drums 10. The sliding blocks v are likewise joined Fig. 843. End View of Fig. 842. to their ropes 11, run over rollers 12, and to their drums 13; whilst a second pair of ropes 14 proceed from the lower portion of v over pulleys 15 and 16, also to drum 13. The three pairs of drums 7, 10, and 13 are all on spindle 17, to the outside end of which is fixed a further drum 18, which receives motion for the shaft by rope 19 from drum 20 over guide 21. The lower end of the shoot portion r is manipulated by rope 22 running over guide rollers 23, 24, 25, 26, and drum 27. In a similar manner is shoot portion / manipulated