Tunneling by Machinery: Description of Perforators and Plans of Operations (Classic Reprint) - Softcover

Haupt, Herman

Softcover

ISBN 10: 1332037224 ISBN 13: 9781332037223

Verlag: Forgotten Books, 2018

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Excerpt from Tunneling by Machinery: Description of Perforators and Plans of Operations

The length of the Mount Cenis drill is one hundred and six and one-third inches, its weight between six hundred and seven hundred pounds, too great to be handled except by machinery its length permits holes to be drilled only in directions nearly parallel. Its parts are numerous, its liability to derangement great. The cost of repairs so considerable that the expense of tunneling exceeds the cost by hand labor. A section of the Mount Cenis drill on a scale of one-eighth the full size is given in Plate 1, Fig. 1.

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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.

Reseña del editor:

Excerpt from Tunneling by Machinery: Description of Perforators and Plans of Operations

In 1855, the inventor of this new mode of tunneling became connected with the Hoosac Tunnel, in the State of Massachusetts, a tunnel which was intended to be nearly five miles long without shafts, and designed to perforate the Green Mountain range at its base. His attention was at once directed to the construction of machinery for the purpose of drilling holes to be blasted afterwards with gunpowder. These experimental investigations were pursued by him at the very time when M. Sommellier and his associates were engaged in developing their machinery for the tunnel of the Alps, and with very similar results. Mr. Haupt's first machine, like that of Sommellier, consisted of a cylinder containing a piston to be worked by air, the cylinder moving forward on a stationary frame as the drill penetrated the rock with suitable mechanism for effecting the movements of feed and rotation.

Mr. Haupt was not satisfied with this machine; it was too complicated and too bulky; too many moving parts, and too much liability to derangement; he aimed at greater simplicity both in the machine itself and in the mode of mounting the drills. He sought to construct a drilling engine which should be very small, light, portable, compact, strong, cheap, not liable to derangement, easily repaired, so mounted as to possess great mobility, admitting of being placed and secured at any elevation, or at any inclination without loss of time, and lastly, that the space occupied by the whole apparatus should be so small that operations could be immediately resumed after a blast, without waiting to remove the debris which the explosion had detached.

These desirable and yet apparently incompatible conditions have been actually fulfilled, but the result was not attained immediately; as the history of the invention will exhibit.

In 1868, Mr. Haupt became acquainted with. Stewart Gwynn, a mechanical engineer of considerable reputation, whose attention had been directed to the construction of drilling engines for submarine operations, the prominent feature of which was a hollow piston rod through which the drill passed.

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.

Über diese Auflage

• Verlag: Forgotten Books
• Erscheinungsdatum: 2018
• ISBN 10: 1332037224
• ISBN 13: 9781332037223
• Einband: Tapa blanda
• Anzahl der Seiten: 72