The Mechanical Handling and Storing of Material

124 THE MECHANICAL HANDLING OF MATERIAL by merely moving a lever the contact can be made or broken. The action is complete, the buckets being so tipped that nothing is allowed to remain in them after they pass the discharging point. The chain is centrally supported and centrally driven, the wheels being placed between the links of the chain, while each alternate pair of wheels has an axle traversing the space between the two chains and cor- rectly maintaining the distance between them, thus prevent- ing distortion or alteration of the track gauge. The buckets are suspended on pivots projecting from the inner side of the chain, and are so arranged that by withdrawing two pins each bucket can be removed from the conveyor without dis- turbing any other part. The wheels are so made that each will carry enough lubricant to provide for a certain period of running without attention. The track con- sists of a special sec- tion of headed rail, joined together in convenient lengths by double fish plates, securely bolted through the rails, and resting upon cast-iron standards, to which the rails are bolted by means of hook bolts, obviating all drilling of holes, and consequent reduc- tion of the rail section. The curves which change the direction of the movement of the buckets are, as far