Mohave County miner., 1910-12-03
Rapid Growth in the Use of Aerial Tram
 ways.

ways.
 The adaptability and economy of aerial tramways for transportation of ore in mountainous localities are well exempliied in the line recently built by the Trenton Iron Co. of Trenton, N. J., for the Utah Consolidated Min ing Co.,, at Bingham canyon, Utah, which is 2S,OOO 1t. long, and with fall between the terminal stations of 1925 1t. This line, which is designed for a capacity of 100 tons per hour when running up to full capacity, is esti- mated to develop about "A horsepower, with no back freight on the line. As the power developed, however, may vary considerably, according to the COZ ditlons under which they happen to be operating, and at times when they carry back freight, for instance, power may be required, electric motors are provided, operating in such way that they serve as controllers or motors, as the conditions may demand.
 The line is divided into three sec tions, the first section, 4,600 1t. long, extending from the loading terminal to the summit of the mountain, l,455 ft. above the loading terminal. The second section, which extends from the mountain summit to an inter mediate station 1,500 1t. below, is 3,760 it. long, while the balance of the dis tance is covered by the third section and has fall of 1,2I9 1t.
 The track cables used are l l-2 in. diameter on the loaded side and l in. diameter on the empty side, and are of the patent locked-coil construction made by the Trenton Iron Co. The traction rope used is 1 l l6 in. dia- meter, of Scale construction, Lang lay. From tension station No. ? to the sum- init the line make a clear span of about 1, 100 it.
 The two motors used to operate the line are located one at the station on the mountain summit and the other at the intermediate station Joining sec tions and 3. The station on the mountain summit Is really connecting station joining stations and 2, which, when running to full capacity of 100 tons per hour, require from 9 to 26 horsepower. The third section is practically an independent line, devel- oplng about lOJ horsepower when running at full capacity and the motor at the intermediate station constitut- ing the upper rminal of the third section is so designed that when run ming at normal speed, it acts as gen. orator, and, therefore, supplies all the power necessary for running sections and ?, with an excess that is absorbed by brakes. The arrangement. there fore, meets all conditions, the motors serving to supply such power as may be required in starting the line, es- pecially after it may have been strip ped of the carriers, and also utilizing the large amount of power developed after the line is fully loaded and run ming up to full capacity.
 Two hundred and twenty-two car riers are used in all, 2lO on the line and F at the stations, with 8 GU. ft. steel buckets and patent automatic un- derhung grips, and these carriers are moved at speed of 600 1t. per minute.
 The Trenton Iron Co. is engaged in the building of line for the Nevada Mining, Reduction & Power Co. at Dayton, New, 2O,58O 1t. long, which will be used for transporting ore, this line being designed for a capacity of p tons hourly, and also a number of smaller lines.- William Hewitt in Denver Mining Science.