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 (1871)
Armengaud, Charles A., 1813-1893, Armengaud, Charles, 1813-1893, [from old catalog] joint author, Amouroux, Jules, [from old catalog] joint author, Johnson, William, 1823-1864. [from old catalog] · Philadelphia, H. C. Baird · leaf 200
butto prevent the point of the screw from injuring thebar, a loose plate of metal is interposed next to thebar, as shown in the section, fig. 24. The socket,M, is in a solid piece with its pen, or pencil-holder ; but the centre leg, n, is in a separatepiece from its socket, m, and is capable of… … horizontal screw pnsange, or nut, to rccolvo llio screw spimilc,r, which is held by nil eye lit llio oml of th(> .sockjt proovc,and is actu:itl by means of a butlon on llic outsi(li>. By 190 THE PRACTICAL DRAUGHTSMANS turning the screw, i, in either direction, the centre leg may beadjust(Kl…
Mechanical drawing
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