. The railroad and engineering journal . hip or shoulder joinls. If, therefore, Ihe pipes are joined wilhsuch spherical or ball-joints, as they are called, the lower endcan be moved sideways several inches either way, and the jointwill still be steam tieht if it is then firmly bolted after it is bolted together it will have so Tiuch tlexibiliiv Fig. 167. joints of the steam-pipes, a ring, a b, fig. 170, is interposed be-tween the pipes. One side of this ring is spherical and theother Hat, so that the pipes can move either around the spheri-cal part or slip up or down or sideways
. The railroad and engineering journal . hip or shoulder joinls. If, therefore, Ihe pipes are joined wilhsuch spherical or ball-joints, as they are called, the lower endcan be moved sideways several inches either way, and the jointwill still be steam tieht if it is then firmly bolted after it is bolted together it will have so Tiuch tlexibiliiv Fig. 167. joints of the steam-pipes, a ring, a b, fig. 170, is interposed be-tween the pipes. One side of this ring is spherical and theother Hat, so that the pipes can move either around the spheri-cal part or slip up or down or sideways on the flat surface of thering. In this way the pipes are flexible and adjustable in every. Fig. 169. that the expansion and contraction of the pipes will not causeIt to leak. There is, however, still another difliculty. Although thelower end of the pipe, S4, fig. 164, can, with a ball-joint above,be moved in any direction horizontally, yet if the pipe is toolong or too short it is obvious such a joint will not permit it tobe moved up or down. A joint with a flat surface, like thatshown in fig. 16S. would, however, permit such motion in thepipe without leaking. If, for example, the steam pipe were\ in. too short, it might be drawn down that distance, and if theupper joint were then screwed up it would still be order, then, to get both vertical and lateral flexibility in the
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Keywords: ., bookcentury1800, bookdecade1880, bookidrailroadengi, bookyear1887
