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
of a ruler, whilst the wire carrying the pen is left toFig. 3. find its way from its initial angular position, to that ofa line in the same plane asthe slider ; and, in doingthis, tho pen describes thecurve we have represented.Fig. 3 is a vertical sectionof a millstone arrangementon this system,… … also shows the adaptation of the principle to footsteps, togetherwith a new system of lubrication of these surfaces so liable toextreme abrasion. The oil supply is kept in an elevated vessel, a,whence a pipe, b, proceeds downwards to the footsteps, uponwhich a pressure is thus constantly kept by…
Mechanical drawing
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