The Mechanical Handling and Storing of Material

AERIAL CABLEWAYS OR CABLE-CRANES 3*5 Onomea Sugar Co., of Hilo, in the Sandwich Islands, have erected a cableway for handling 'cargo on a rugged coast where vessels often cannot get into the dock. 1 he loads are swung over the small boats by a stationary derrick. In mining enterprise the cableway has already played no inconsiderable part. The Ottawa Gold Milling and Mining Co., of Lake of the Woods, Ontario, Canada, Fig. 449. Lidgerwood Steam Hoist. employ a Lidgerwood cableway to unload gold ore from lake barges and deliver it ovei the main line of the Canadian and Pacific Railway to their mill at Keewatin, Ontario. The span of this cableway is about 450 ft., whilst the load carried varies from 2 to 3 tons. A clearance of over 22 ft. is given over the cableway, which is itself 20 ft. above the lake. The tail tower, 75 ft. high, stands on piles driven into the lake, and to these Fig. 450. Showing Details of ('ableway as used on the Chicago Drainage Canal. piles the cable is also anchored. The material is automatically dumped into the oie bins at an elevation of 43 ft., and at the rear of the ore bins is the 80 ft. head tower, from which the operator has a clear view of the entire work. The barges are moored under the cable between the tail tower and shore. A special feature of this cableway is a bell-hoist installed at the base ot the head tower, which is driven from a line shaft in the mill, which is in turn run by water power.