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 (1863)
Armengaud, aîné (Jacques-Eugène), 1810-1891, Armengaud, Charles A., 1813-1893, Amouroux, Jules, Johnson, William, 1823-1864 · Philadelphia : H.C. Baird · leaf 24
re, and i b the radius of the smaller arc, i b k, which, together with the arc, H k, described with the centre,L, and radius, l d, equal to h c, form the lower portion of thorequired figure; the lines, g h, l k, which pass through therespective centres, also cut the arcs in the points of junction,j… … The pencil is at a, in an adjustable holder, capable of slidingalong the connecting-rod, b, one end of which is jointed at c, to aslider on the horizontal bar, D, whilst the opposite end is similarlyjointed to the crank arm, e, revolving on the fixed centre, f, onthe bar. By altering the length of…
Mechanical drawing
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