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 (1866)
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 174
whilst the wire carrying the pen is left to MDlii A Fij. 3. find its way from its initial angular position, to that ofa line in the same plane asthe slider ; and, in doingthis, the 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, togetherwdth 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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