Practical engineering drawing and third angle projection, for students in scientific, technical and manual training schools and for ... draughtsmen .. (1897)
Willson, Frederick Newton, 1855-1939 · Princeton, N.J., The author · leaf 73
2. A parallel curve is one whose points are at a constant normal distance from some othercurve. Parallel curves have not the same mathematical properties as those from which they arederived, except in the case of a circle; this can readily be seen from the cam fig-ure under the lastheading, in… … Instead of actually determining the normals to a curve and on each laying off a constantdistance we may draw many arcs of constant radius, having their centres on the original curve; thedesired parallel will be tangent to all these arcs. In strictly mathematical language the parallel curve is the…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
