The Mechanical Handling and Storing of Material

468 THE MECHANICAL HANDLING OF MATERIAL The top of the balance post, carrying the jib, is 35 ft. above the jetty, so that the combined movements of the jib and post make it possible to take the elevator out of the holds of the largest ships bringing grain to this port, even at high water. I he elevator is telescopic and can be extended to a length of 73 ft., so that the movements of the ship as it varies according to the tide can readily be followed by the elevator. After a steamer is once moored alongside it is not necessary to move it until the cargo is discharged. Another important feature is that the elevates may be turned round on their bases by a small electro-motor, so that when they are not at work they may be housed entiiely over the jetty so that there is no portion projecting over the river. The elevator buckets deliver through an automatic telescopic shoot on to a band conveyor which has been erected within the jib and is therefore protected from the influences of the weather. The grain is then delivered by another shoot to a band conveyor which runs along the quay. There is a total absence of long driving chains, as an electro-motor is provi e for each motion. The motor for driving the elevator is fixed on the top terminal and drives direct by gearing. A separate motor is provided to drive the belt com ey or an also for each of the motions, travelling, turning, jib controlling, post tilting, an of raising the telescopic elevator, in all seven motors for each unloader. On the side of each appliance is the driver’s cabin, which is placed at such a heig i