. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ilways, or even tramways, due in some cases to the valueof the ground, and in others to its physical features, has led to theintroduction of a new method of transport—the aerial wire ropeway. Such a ropeway, by its long spans (in some cases of 1500 ft.), passesover all obstacles, while it hardly affects the value of the land, of whichnone need be purchased for permanent way. All that is required is thelease or user of a strip of ground, 10 ft. wide, which is occupied only atthe
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. ilways, or even tramways, due in some cases to the valueof the ground, and in others to its physical features, has led to theintroduction of a new method of transport—the aerial wire ropeway. Such a ropeway, by its long spans (in some cases of 1500 ft.), passesover all obstacles, while it hardly affects the value of the land, of whichnone need be purchased for permanent way. All that is required is thelease or user of a strip of ground, 10 ft. wide, which is occupied only atthe points of support, and can otherwise remain in cultivation as usual. 515 ^i6 MACHINERY FOR METALLIFEROUS MINES. The Otto Ropeway.—Aerial ropeways may be broadly distinguishedas one and two rope systems : the former consisting of an endlessrunning rope, which serves the dual function of carrying and hauling ropefor the buckets. This system (which is connected with the names ofHodgson and Hallidie) is in use in America and Northern Spain ; butin spite of its simplicity and cheapness it is surrounded with many. Fig. 345.—Otto Aerial Ropeway,Wooden Standard. Fig. 346.—Otto Aerial Ropeway, Iron Standard. difficulties in actual working. For this reason it is being superseded bythe German or two rope system, which consists of the use of tworopes—a heavy fixed carrying rope and a light travelling hauling rope,to which the buckets are fixed by means of special gripping devices. This latter is known as the Otto or the Bleichert system—by thenames, that is, of two gentlemen who have been instrumental in bringingit to perfection. Their representative for England and the Coloniesis Mr. R. E. Commans, , of 6, Queen Street Place, London, (The two rope system of Messrs. Bullivant will be found describedlater on, pp. 525-528.) I myself have had some personal experience AERIAL ROPEWAYS. 517 abroad of the erection and working of the Otto system, in connectionwith a lignite br
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