. Transactions. Air Black Bear Tunnel. Siirrace Plant Le Roi. House. Ore Cars. used altogether at the Le Roi and works very satisfactorily. Here thebins are much larger than those at the Centre Star, the one on the 700level holding 350 tons of ore. The gates of these bins are worked bycompressed air cylinders. By this method the skips can be loadedmuch faster and less dangerously. The tracks are 15 lbs. per yard, and are spiked, in the drifts, toties 2^ feet apart. Various types of switches, in and about the mine,are shown in the sketches. i Mining in the Rossland Di
. Transactions. Air Black Bear Tunnel. Siirrace Plant Le Roi. House. Ore Cars. used altogether at the Le Roi and works very satisfactorily. Here thebins are much larger than those at the Centre Star, the one on the 700level holding 350 tons of ore. The gates of these bins are worked bycompressed air cylinders. By this method the skips can be loadedmuch faster and less dangerously. The tracks are 15 lbs. per yard, and are spiked, in the drifts, toties 2^ feet apart. Various types of switches, in and about the mine,are shown in the sketches. i Mining in the Rossland District. 461 The mine car in use in the chief mine<: is 2 ft. ii)4 in. from trackto top of body, and has a capacity of, 16 cubic feet of rock. The turn-table on the truck allows it to be dumped in any direction. The axles are of the Anaconda type. In this type the axle isdivided in the centre, mainly to allow for variation of travel in passingaround curves, also to enable the wheels to be pressed separately on. Le Roi Ore Bins. each half axle. This construction simplifies repairs, does away withnuts and caps on the outside, and necessitates oiling only once in threeor four weeks. HOISTING. At the Centre Star shaft there is installed a sieam hoist made byWebster Camp and Lane, of Akron, Ohio, with two drums, each 6 3 ft., with a capacity of 1700ft. of rope of sin. diameter. Theaverage winding speed is 800 ft. per minute, with a maximum of 1200 the motions are controlled by hand levers except the steam drum 462 The Canadian Mining Institute. brake. This consists of a governor which is connected with the the wheel goes too fast, the governor allows compressed air toenter a cylinder, which causes a brake to press on the wheel. Whenthe speed passes 900 ft. per minute this mechanism comes into engines are 14 in. x 18 in. stroke, with a Stevenson reversinggear. A Lane friction clutch permits of either drum being run inde-pendently of the other; a nece
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Keywords: ., book, bookcentury1800, booksubjectmineralindustries, bookyear1895
