. The railroad and engineering journal . aft, like that shown in fig. this instance the rod A was subjected to a compressivestrain by the tension of the two volute springs. Fig. 164 shows a helical spring, which was applied in 1875for the same purpose. This was also enclosed in a cylindrical Fig- 159- Another plan of applying a semi-elliptic spring is shown inplan in fig. 160. In this case the spring 5 was connected toa short arm, B. forged on the middle of the lifting-shaft. In 1S60, a spiral spring, figs. 161 and 162, was used. Theinner end of this spring was attached to the lifting-s
. The railroad and engineering journal . aft, like that shown in fig. this instance the rod A was subjected to a compressivestrain by the tension of the two volute springs. Fig. 164 shows a helical spring, which was applied in 1875for the same purpose. This was also enclosed in a cylindrical Fig- 159- Another plan of applying a semi-elliptic spring is shown inplan in fig. 160. In this case the spring 5 was connected toa short arm, B. forged on the middle of the lifting-shaft. In 1S60, a spiral spring, figs. 161 and 162, was used. Theinner end of this spring was attached to the lifting-shaft S,and the other end was fastened to a case in which it was en- Fig. 160. closed. The case was prevented from turning by a bolt, required amount of tension was brought on the spring byturning the case, and the bolt was adjusted in any one of theholes, which were arranged in a circle, as shown in the en-graving. In 1873, a pair of volute springs was substituted for thesemi-elliptic spring. These volute springs are shown in Fig. 164. case, which was fastened to a fixed part of the engine. Achain, C C, was fastened at one end to the shaft, and woundaround it as shown. The other end was attached to a rod, R,which was screwed into a collar, K. When the shaft wasturned the spring was compressed. Its tension could be ad-justed by means of the screw-end on the rod so as to balancethe weight of the link. (To he continued.) The Miltimore Machine for Dressing Car Wheels. A .NEW machine for dressing and truing up car wheels hasbeen devised and construcied by Mr. George W. Miltimore,of Arlington, Vt. It is based on the principle that a wheel ofcomparatively soft metal, if moved at very high speed, willwear away the hardest surfaces. The Miltimore machine, asarranged for car wheels, has a disk or wheel, the outer portionof soft steel, 40 in. in diameter and with a face correspond-ing in shape to the tread of the wheel. This disk is mount-ed on a shaft 6 in. m diameter and is
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
