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 122
will give -Sj, theauxiliary projection of the upj^er edge of the face sved, whence sv—at first indefinite in length—isderived, parallel to de. Similarly the end face btsd is obtained by projecting db upon AB at 6,,drawing b^z at 60° to AB and terminating it at Sj by CD, drawn at the same height… … As the recess has ^-ertical sides we may draw its plan, o p q r, directly from the given dimen-sions, and show the depth by short-dash lines in each of the elevations. The orcUnary elevations are derived from the plan as in preceding problems; that is, for thefront elevation, ausd, by verticals…
Mechanical drawing · Lettering
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