The Mechanical Handling and Storing of Material

438 THE MECHANICAL HANDLING OF MATERIAL Fig. 614. It will be observed that the dumping toggle 47 has been turned over, and is pointing in the opposite direction. With the mechanism in this position the skip is lowered to the point at which it is desired to discharge its contents. On commencing to lift, the dumping toggle 47 engages with the notch 34 on the periphery of the fall-block sheave, and by the continued movement of the sheave the latch of the skip is pulled out of gear by the wiper 58 and its chain acting through the lever 64 and the chain 65 attached to the latch of the skip. Fig. 615. Temperley Travelling and Slewing Transporter. A special feature of the dumping fall-block is the setting lever 37, by means of which the dumping mechanism is thrown entirely out of gear, so that by no possibility can the skip be automatically upset while being lifted from the weighing machine. If the men omit to throw the dumping mechanism out of action by the movement of the setting lever, the bucket immediately upsets on the commencement of lifting. Thus the operators, although they cannot be hurt by the upsetting of the bucket, are forcibly reminded of the results of their negligence. A later form of this transporter has been fitted with two-rope grabs for handling hard lumpy coal, and similar material, with the advantage that the lifting and lowering can be carried on whilst the traveller is being transported along the beam without either operation interfering with the ether.