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 633
. combs with hooked teeth, from which teeth it has to he released in order to he deposited on the warpThese teeth frequently allow some portion of the material to fall or slip off too soon. This difficulty I design to obviate by my improvement, which consists in the employment of an apronof some… … bottom of this bos is thickly perforated all over with small holes, and it communicates by pipes fromone or both sides with a fan, blower, or other apparatus capable of withdrawing the air and forming avacuum within. The air being withdrawn from the bos, the external air rushes through the apron…
Mechanical engineering · Mechanics · Engineering
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