. Revised and enlarged ed. of the science of railways . y having two contrary eccen-trics for each cylinder; one is fastened to theshaft in such a position as to move the valve sothe engine will run forward; the other is set sotliat the engine will move backward. Theseeccentrics are attached to the opposite ends of alink by means of eccentric straps and rods. The 90 RAILWAY EQUIPMENT. purpose of this link is to change the direction ofmotion of the engine by bringing the eccentricblade of the desired motion in contact with therocker arm and for giving the required Side View of Eccentr
. Revised and enlarged ed. of the science of railways . y having two contrary eccen-trics for each cylinder; one is fastened to theshaft in such a position as to move the valve sothe engine will run forward; the other is set sotliat the engine will move backward. Theseeccentrics are attached to the opposite ends of alink by means of eccentric straps and rods. The 90 RAILWAY EQUIPMENT. purpose of this link is to change the direction ofmotion of the engine by bringing the eccentricblade of the desired motion in contact with therocker arm and for giving the required Side View of Eccentrics, Straps and Reversing Gear. When the link is placed with a block at one ofits ends, steam will follow the piston nearly tothe end of the stroke and as the link is raised orlowered, so as to bring the link block toward the center of the link, the cut-off is shortened. The rocker arms areconnected by rods, called valvestems, to the main valves. The link^ are suspended to theends of arms by bars, called linkhangers. These arms are at-tached to what is called a liftingshaft, which also has another up-right arm attached to it on the right hand side
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