Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 556
e pressure vary, the piston will have corresponding movements either up or down. If a pencilp, be attached to the piston-rod, it will register the variations of pressure upon a piece of paper heldagainst it; but, unless some provision were made to give a clear space upon the paper at each instantof… … piston, and a re\ ersed motion during the return stroke, while the pencil moves vertically, a continuousline will be traced upon the paper, which will inclose a space, and the vertical ordinates of the figurewill represent the effective pressure during a complete stroke. Instead, however, of using…
Mechanical engineering · Mechanics · Engineering
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