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 46
to its suggestions the student is fur-ther advised to work, at first, on as large a scale as possible, not undertaking small curves of sharpcurvature until after acquiring some facility in the use of the curved ruler. THE HELIX. 120. The ordinarj helix is a curve which cuts all the elements of a… … ffluuuuuuuuumuumuui The student can readily make a model of the cylinder and helix bydrawing on thick paper or Bristol-board a rectangle A B 0 D (Fig. 81)and its diagonal, D B; also equidistant elements, as m 6, n c etc. Allowat the right and bottom about a quarter of an inch extra for overlapping,…
Mechanical drawing · Lettering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
