Autobiography of Sir John Rennie, F.R.S

Autobiography of Sir John Rennie, F.R.S

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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. 1875 edition. Excerpt: ...fuel. The ingenious idea of the crank was pirated from him before he could patent it, and he resorted to another invention to produce rotary motion, which he called the sun-and-planet wheel; this consisted of a toothed wheel attached to the lower end of the connecting rod fixed to the end of the beam, which wheel worked into another attached to the end of a horizontal shaft, upon which were fixed other wheels to give motion to any system of machinery which might be required. It should be observed that in this improved engine the connecting rod of the piston was attached to one end of the beam, the connecting rod attached to the crank, or sun-and-planet, was fixed to the other, and the air and cold water pumps were attached to rods connected with the intermediate part of the main beam, so that they were all worked together by the rising and falling of the piston, and thus formed one whole compact machine. He also added several minor contrivances, which it is unnecessary to mention, and which rendered the steam engine still more complete. His improvements did not end here, for he made numerous experiments upon the expansibility or elasticity and effects of steam at various temperatures, constructed a high-pressure engine, and subsequently one with a condenser mounted upon a carriage supported by wheels, which was nothing more than the locomotive engine, a model of which still exists. Watt, however, as I have already observed, did not like highpressure steam: he was fully aware of its importance; but at that time, from the backward state of the iron manufacture, he did not see his way to controlling it with safety, and he considered that his low-pressure condensing system was the best and most economical, and he therefore gave up all idea more

Product details

  • Paperback | 144 pages
  • 189 x 246 x 8mm | 268g
  • United States
  • English
  • black & white illustrations
  • 1236860012
  • 9781236860019