Report of the Chief of Engineers Volume 1

Report of the Chief of Engineers Volume 1

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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. 1874 edition. Excerpt: pushing them by means of hydraulic jacks, which, at will, by means of a cock, may be put in communication with an accumulator on the bank. This is the general idea of the system, whose trial was authorized by an official order of June 23, 1870. The point selected was on the Yonne, at the weir of the Ile-lirule'e Dam, which is situated a little more thau a mile below Auxerre, and has a normal fall of 6 feet. The following is the description of the movable parts, taken from M. Girard's project for a high dam: (Plate 14.) Each shutter is composed of three pieces of wrought iron of this shape, I, fastened at bottom to an axlo which forms a hinge throughout its length. This hinge turns in a cast-iron hollow quoin, made fast to the sole. The I-irons are covered on their down-stream faces by a plate of sheet-iron, and on their up-stream faces by oak timbers. A shutter is Hi feet in length, measured in a plane normal to the axis of rotation, and commencing at this axis. Its vertical projection, when it is up, is 10 feet; its horizontal width is 13 feet inches. A shutter, when up, has a batter of four-tenths. The space between two consecutive shutters is 1J inches. Below each shutter a cast-iron cylinder is fastened to the sole on a slope of about 10; this cylinder, called by M. Girard corps tie presae, receives a piston, one foot in diameter, on whose outer end is a cast-iron cross-head, which is constrained to slide in three cast-iron guides, designed to secure its rectilinear motion. These guides are fastened to the sole, and are parallel to the prolongation of the axis of the cylinder of the jack. Upon the cross-head of the piston are fastened three bars, which act as props to the shutter; each of these bars is fastened by a more

Product details

  • Paperback | 546 pages
  • 189 x 246 x 28mm | 962g
  • United States
  • English
  • black & white illustrations
  • 1236852109
  • 9781236852106