The Mechanical Handling and Storing of Material

ELEVATORS FOR MATERIAL IN BULK material a reduction of 10 per cent, on the speeds is to be recommended. All elevators will work fairly well at a small margin on either side of the correct speed. Elevators handling material of a lighter nature should not have the buckets as close together as in the case of heavy material, if running at the same speed. In elevators for soft material the delivery spout should also be placed at a lower point, as the lighter material is necessarily slower in clearing the buckets, and with buckets too close together a portion of the material will fall on to the back of the preceding bucket instead of passing into the outlet spout. Capacity of Elevators, with Various Food-Stuffs and Intermediate Products of Flour Mills, in Hundredweights per Hour Size of Elevator. 1 2 3 ' 4 5 1 6 (See previous Tabled Wheat 15 24 54 87 120 240 Barley _ - - 12 20 45 72 100 200 Oats 10 16 36 58 80 160 Maize 15 24 54 87 120 240 Malt - - - 10 16 36 58 80 160 Beans or peas - - " 16 26 58 94 130 260 Wheat meal or barley meal Oatmeal ----- 10 19 16 15 36 34 58 55 80 76 160 152 Semolina - - ' 12 20 45 72 100 200 Middlings- 11 18 40 65 90 180 Flour 14 22 50 81 112 224 Fine ) pollard Coarse J or sharps Chop Bran - First break Materials handled < 5 14 12 7 6 19 16 14 42 26 22 68 36 31 95 72 61 190 in Flour Mills 1? 5 18 11 40 17 65 24 90 48 180 Second break - 9 14 31 51 70 140 Third break 5 7 16 26 36 /2 Fourth break 4 6 14 22 36 If elevators are too small for their load the buckets will be too full, and will commence to spill as soon as they begin to turn over the uppei terminal. Flanged pulleys used to be employed for elevators, but they have been generally superseded by ordinary pulleys well rounded on the face. It is most essential that doors should be provided on enclosed elevators for the purpose of examining the elevatoi top and well.. At the former point it will be possible to determine if the delivery is a perfect one, and at the latter to free the elevator easily in the event of a choke. I here should also be doors in the elevator Issjs, preferably on each floor through which the elevatoi passes if erected in a. factory building. At some point in the elevator legs theie should be a large door in front as well as at the back of the trunk, preferably near the elevator well. 1 hese doors should not be less than 3 ft. in length, and are for the purpose of giving access to the elevator band to allow of shortening it, should this become necessary. To facilitate tightening, the two ends of the webbing are bound with leather strips about 3 in. wide, and to one end are riveted a pair of straps each some 3 ft. long, and to the other end a corresponding pair of buckles. Whenever the webbing becomes slack it is only nscessary to bring this joint to the above-mentioned door and pull up first one and then the other of these straps till the required tension is obtained. Elevator bands