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 174
TRIAL DESIGN. 165 into a series of infinitely short lengths, he proposed to take a moreobtuse cone for each larger portion, and in such progression, thatit would require equal pressure for every portion of the surface tocause a uniform sinking of the plug in the course of wear. Thecontour thus… … 1-2 size. hence the use of the simple instrument illustrated by fig. 2. Thiscontrivance consists merely of a straight brass wire, a, jointed atone end by a pin to the upper surface of a small wooden slider, b,which is hollowed in the centre to receive the tip of the finger indrawing a curve. A…
Mechanical drawing
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