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Coal Cutting by Machinery in the United Kingdom

Coal Cutting by Machinery in the United Kingdom


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About the Book

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1902 edition. Excerpt: ...the second-motion shaft from the crank shaft. The engines, crank shaft, main driving shaft of the cross-arm, and gearing are held in a vertical frame as shown, to which are also attached the wheels on which the machine runs. There are only two wheels for the machine to run on, carried in the central line of the apparatus immediately under the main driving axle. The main driving shaft of the cross arm is threaded for 36 in. of its length, and is caused to move on towards the coal as it revolves, at the rate of in. for every revolution of the cross-arm. The machine in operation is brought close up to the face and chocked in position, the air is then turned on, the engines move, the crank shaft revolves, the cutter bars move round the circle in which they are to work, and the shaft carrying them advances as they cut. When the cutting arm has advanced a yard, which is the distance the machines are set for, the machine is spragged, the shaft of the cutting arm set fast, and the engine with the rest of the frame brought up to the shaft by the revolution of the engine itself. When the engine has arrived at the position from which it started to make the first cut, it is again chocked, and again run forward as before, the piece of coal which has been cut round having been meanwhile got out. Two men are required to work the machine, one to control the engine and the other to pass the cuttings back as they are delivered by the machine. The machine is made in sizes to cut from 4 ft. to 7 ft. 6 in., the sizes advancing by 3 in. A double machine is also made, consisting of two machines coupled together, for the purpose of driving a heading double the width, and another machine is also made in which the whole of the face is cut away instead of an...


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Product Details
  • ISBN-13: 9781236954442
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 54
  • Spine Width: 3 mm
  • Width: 189 mm
  • ISBN-10: 1236954440
  • Publisher Date: 13 Sep 2013
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 113 gr


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