The Mechanical Handling and Storing of Material

442 THE MECHANICAL HANDLING OF MATERIAL the order of the Buenos Ayres Great Southern Railway for handling coal by means of automatic grabs at the freight terminus at Buenos Ayres. All the operations of the transporter are controlled by one driver from a platform on the tower, so situated as to command a good view of the work. An electrically driven travelling hopper weighing machine travels along the bridge girder over the coal bunkers. The Temperley Portable Transporter.—This is a self-contained apparatus similar to that already described, but intended chiefly to be used on vessels and operated by the ship’s winch. It consists of an automatic traveller of either the single purchase or the double purchase type; the usual beam on which the traveller runs, suspended Fig. 620. Two Temperley Electric Travelling and Slewing Transporters. from any convenient support, such as the ship’s derrick or a span between the masts, and held in an inclined position of 1 in 3 by guys ; and a lifting rope which is led to the ship’s own winch for lifting, transporting, and lowering the load. For use on vessels the transporters are made from 30 to 65 ft. long, in multiples of 5 ft., and for loads up to 30 cwt. Transporters of the M‘Myler Co.—Transporters similar to those previously described have been built by the M'Myler Co., of Cleveland and London, the difference being too slight to warrant a further description. Fig. 621 shows a small installation erected by this firm for the purpose of conveying the material from the ship to the railway truck. It is of interest chiefly on account of the unusual way in which the jib end of the transporter is disposed of when the latter is out of use. These ends are, as a rule, raised up out of the way, but in this case the