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Report on Coal Boring Operations at the Head of the Grand Lake: For the Year 1893 (Classic Reprint): For the Year 1893 (Classic Reprint)

Report on Coal Boring Operations at the Head of the Grand Lake: For the Year 1893 (Classic Reprint): For the Year 1893 (Classic Reprint)

          
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About the Book

Excerpt from Report on Coal Boring Operations at the Head of the Grand Lake: For the Year 1893

The drilling machine stands on the centre of the platform. And consists of a stout wooden frame upon which rests the metal work. At the rear is a small vertical piston, which turns a horizontal bar extending to the front of the machine. This bar carries a drum, around. Which is wound the wire hoisting rope. The horizontal bar terminates in front with a crown-wheel. The swivel head which contains the feed piston, into which the drill rods fit, is secured to the front of the machine with clamp screws in such a manner that it can be set in any position, so as to bore vertical, horizontal, or angular holes - the whole. Arrangement being set in motion when the steam is turned on, and the rods revolved by means of the above mentioned crown-wheel. Both the drum and swivel head can, how ever, be disconnected at will by means of levers, so that either can be revolved irrespective of the other. When not required for boring, or when in the act of driving the stand pipe, the swivel head is nu shipped and laid aside, and the machine slid back on its frame to make room for the pipes and drive block. A square hole of about two feet is cut through the platform in front of the machine, to allow for putting down the pipes. Over all is erected a tripod of stout sticks, about thirty-two feet long, bolted together at top, upon which two platforms are fastened, where a man stands to aid in hoisting and lowering the rods, screw the joints together, and at tach the blocks or water swivel, &c. A large sheave wheel hangs from the apex of the tripod to receive the wire rope from the drum. A hook attached to the end of the rope hangs down immediately over the hole used in hoisting the rods and driving block. Another olong exhaust pipe extends from the back part of the machine simil ar to that from the pump.

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.


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Product Details
  • ISBN-13: 9781527724501
  • Publisher: Forgotten Books
  • Publisher Imprint: Forgotten Books
  • Language: English
  • ISBN-10: 1527724506
  • Publisher Date: 08 Oct 2018
  • Binding: Paperback
  • Returnable: N


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