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 66
scended a triflingspace when the piston is at its highest. This slight space, though trifling in amount, is important in itsresults on the working of the engine. It is denominated the lead of the slide. As the piston descendsthe valve rises, and tlic admitting orifice becomes larger, so that… … The slide, however, has already begun its downward motion, and when the pencil arrives at C it hasreturned into the position it had in Fig. I. It is clear that as it continues to descend no more steamcan be admitted; whatever the cylinder contains will remain pent up; and as the piston continues…
Mechanical engineering · Mechanics · Engineering
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