The Mechanical Handling and Storing of Material

594 THE MECHANICAL HANDLING OE MATERIAL tub, is well adapted to secure an extremely rapid motion when coal is not leaving the tippler, and a slow one prior to, during, and for a brief period after its delivery. Multiple Tips.1—A tip which will manipulate a whole train of small gauge trucks is shown in Fig. 839. It was built by G. Heckel, of Saarbrücken, for the purpose of CHAPTER XXXVII LOADING COAL INTO SHIPS OTHERWISE THAN BY TIPS As early as 24th February 1903, when the Author’s paper on the “Mechanical Handling of Material ” was discussed before the Institution of Civil Engineers, the Author in reply to the discussion made the following statement:— “ He thought Mr Apjohn’s statement, that nothing could be much better than the appliances used for dumping the whole of the contents of railway wagons into ships, was open to question. The appliances Mr Apjohn referred to were largely used, and were probably the best that had been used so far; but why should a railway truck weighing 5 tons be raised 50 to 60 feet, in order to empty 10 tons of coal into a ship’s hold? The structures for such coal-tips must be exceedingly strong, and the power required by the machinery, even with the balancing-devices in use, was enormous. Would not a tipping- device on the level of the rails, depositing the coal in a hopper (which required no driving-power), and inclined elevators for raising it, be much simpler, lighter, and require less driving-power? The elevator, or part of it, could be made to swivel like a jib, and thus be raised or lowered to suit the position of any ship to be loaded.” The above is practically the latest practice in loading ships, as will be seen from these pages. [Facing page 595.