To find how much motion an eccentric will give to its rod 223 [xi] To find how much a given amount of motion of a long arm will move the short arm of a lever 224 Example of the end of a lever acting directly on a shoe; a short arm having a roller acting upon a larger roller 225 A link introduced in the place of the roller to find the amount of motion of the rod; a lever actuating a plunger in a vertical line, to find how much a given amount of motion of the long arm will actuate the plunger 226 Two levers upon their axles or shafts, the arms connected by a link and one arm connected to a rod 227 A lever arm and cam in one piece on a shaft, a shoe sliding on the line, and held against the cam face by the rod, to find the position of the face of the shoe against the cam 228 To find the amount of motion imparted in a straight line to a rod, attached to an eccentric strap 229 Examples in drawing the cut off cams employed instead of eccentrics on river steamboats in the Western and Southern States.
— from Mechanical Drawing Self-Taught Comprising instructions in the selection and preparation of drawing instruments, elementary instruction in practical mechanical drawing; together with examples in simple geometry and elementary mechanism, including screw threads, gear wheels, mechanical motions, engines and boilers by Joshua Rose