The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing. (1857)
Armengaud, aîné (Jacques-Eugène), 1810-1891, Armengaud, Charles A., 1813-1893, Amouroux, Jules, Johnson, William, 1823-1864 · New York : Stringer & Townsend · leaf 178
step. It is fittedto the runner by aRyne, made on thebalance principleThe top of the spin-dle is sphericallyshaped, as at o, be-ing passed throughthe collar disc, p,and fitted into aspherical recess inthe under side of theRyne, q, connectedto the stone, a. Inthis way, as the con-nection between… … THE PRACTICAL DRAUGHTSMANS scale. A is the base i)lato, and li the lower running stone, drivenfrom above by the main spindle, i, which passes down through thecentre of the adjustable tubes of the feed-hopper, and terminatesin a convex foot. This foot rests in a concavity in the top ofthe disc…
Mechanical drawing
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