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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 176

An illustration from 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, leaf 176
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… … Fig. 3. 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 tho tip of the finger indrawing a curve. A small…

Mechanical drawing · Architectural drawing · Industrial design

Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.

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