Mine Tracks Their Location and Construction

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Excerpt from Mine Tracks Their Location and Construction: Treating Briefly on the Materials Used and the Principles Involved in the Design and Installation, With a Set of Rules for a Standard Practice The gradual displacement of animals by mechanical haulage as the motive power in mine transportation, the successive increases in the weight of the locomotives employed and the improvements in car journals and rolling stock, admitting of longer, heavier trains at relatively high velocities, are making imperative a closer attention to the track material used in mines. Short-radius curves are falling into disuse wherever traffic is at all heavy. These curves are frequently the limiting factor in the length of the trip. The long wheelbase of the motors is not adapted to them, they are the site of continual derailments, the haulage speed must be reduced at their approach, the cars cannot be pushed around them without danger of the bumpers "locking, " their maintenance is excessive, and for many other reasons the use of sharp curves is questionable economy. The introduction of the steel car for mine transportation also demands a higher grade of trackwork than was required for the wooden car, the deficiencies of the roadbed, to which the semi-pliant material of the latter adapted itself, tends to loosen the construction of the more rigid steel car. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.