The Mechanical Handling and Storing of Material

ELEVATORS FOR MATERIAL IN BULK i7 Figs. 9 and 10 show the most common form of mineral elevator, Fig. 9 representing the top and Fig. 10 the lower part of the same elevator. Devices to Ensure Clean Delivery from Slow-Running- Elevators.— Fig. 11 shows a form sometimes adopted for slow-running elevators, and when the material is of a sluggish nature and not, therefore, discharged readily out of the buckets, or where local conditions, such as want of space, etc., make it necessary to fix the elevator at a steeper incline than 60°. It is apparent that such an elevator as is shown in Fig. 11 must have double strands of chain placed on either side of the buckets, Fig. 10. Well of Mineral Elevator. Fig. 11. Special Form of Elevator which Facilitates Delivery. so that the guide wheels which curve the chain may not foul the buckets. Similar elevators are, however, made with single strands of chain with skidder bars which slide round two angle-bar curves instead of the guide pulleys. I his construction is, however, only advisable for small installations. The same idea is further developed by the adoption of two upper terminals, so as to give the elevator chain a horizontal run between these two terminals (see Fig. 12). A push-plate conveyor is shown as an addition to the elevator, which gives a good idea of the delivery. The Link Belt Company have adopted an ingenious device to get a clean delivery from a slow-running elevator in a vertical position. It consists of a series of wrought- 2