The practical draughtsman's book of industrial design and machinist's and engineer's companion : forming a complete course of mechanical, engineering and architectural drawing (1866)
Armengaud, M. (Jacques Eugène), 1810-1891, Armengaud, M. (Charles), 1813-1893, Amouroux, M. (Jules), Johnson, William, 1823-1846 · Philadelphia : H.C. Baird · leaf 178
. It is fittedto the runner by aRijtie, made on the balance principle.The 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… … 163 THE PRACTICAL DRAUGHTSMANS scale, a is the base plate, and b the lower running stone, drivenfrom above by the main spindle, i. winch passes down through thocentre of the adjustable tubes of the feed-hopper, and terminatesin a convex foot. This foot rests in a concavity in the top ofthe disc…
