The Model Engineer and Practical Electrician Volume 3

The Model Engineer and Practical Electrician Volume 3

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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. 1900 edition. Excerpt: ...bolts are sunk into, and the lubricators are formed on the tops of, the crossheads. The slipper on each crosshead is of gunmetal, and is fitted to an inclined face formed on the bottom of crosshead and held in position by two set screws, with which it can be adjusted vertically by moving it backwards or forwards along the inclined face, thus ensuring perfect adjustment as wear takes place. The slides, which are cast solid with the bedplate, are of simple form and very large area, and provided with oil drips at each end. The slipper works on a flat surface with planed guiding strips at each side, and a couple of adjustable steel strips, 4 in. wide, J in. thick, are bolted to the tops of the guiding strips to prevent any tendency to rise of the slipper at either end of stroke when the engine is running dead slow. The eccentric sheaves are cast-iron and keyed on shaft in the usual way. They are shown, together with the straps, valve spindles, eccentric rods, and crankshaft, in Fig. 7. The keyway was cut in the lathe at the same setting as the boring before the sheave was taken out of the chuck. A slotting tool, specially made for this work, was placed in the slide-rest and the saddle of lathe moved backwards and forwards by means of the rack and pinion, the cut being set by the surfacing screw, thus converting the lathe into a slotting machine. The eccentric straps are gunmetal (the patterns will be seen in Fig. 5), the halves being held together by two 7 i6ths in. diameter hex-head set screws fitted with lock nuts. The straps have a circumferential recess bored in them to fit over the rib turned on the sheaves, and are thus held in position. the little end of eccentric rod is fitted with a 4 in. diameter hardened steel pin, on which the...
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Product details

  • Paperback | 320 pages
  • 189 x 246 x 17mm | 572g
  • United States
  • English
  • black & white illustrations
  • 1236740130
  • 9781236740137