Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 756
intersecting thepitch-line A C produced in the points 1, 2, 3, etc. The horizontaldistances of these points of A C from A b will be the heightsrespectively above and below the element A of the various ele-ments 1, 2, 3, etc. Through the various points of intersection ofthe radii with G H drop… … line being given, the pattern-maker sets his boards (whichwe assume to have the width ofan aliquot part of the circum-ference) around the circle G H,Fig. 3801. The joints are thenshown by the dotted verticallines in the side view. At eachjoint he subtracts or adds thecorresponding horizontal…
Mechanical engineering -- Dictionaries
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