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 (1871)
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 176
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, the pen describes thecurve we have represented.Fig. 3 is a vortical sectionof a millstone arrangement■~-as!\ *^ syst(^tn,… … 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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