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 794
conical points may not come in contact with the wood. The cylinder R4, is urged forward by theweight E, and the cylinder R is held back by the smaller weight E, so that the paper may constantlybe kept well stretched. The excess of the weight E over E is sufficient to overcome the friction of… … the pencil and one of the conical points being brought accurately in the same vertical line at any exacthour, the cylinder is then fastened to the clock by means of the clamp screw, when, as it moves withthe clock, it completes a revolution in twelve hours; the conical points will consequently mark…
Mechanical engineering · Mechanics · Engineering
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