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 151
of the bases;but, in the figure, both vertices hav-ing been taken at the same heightabove the bases, the line which joinsthem must be horizontal, hence parallelto the H-traces of the auxiliaries: thatis, XY, ST, QR, etc., are parcdlelto V e. It happens that the trace MN ofthe foremost auxiliary… … THE INTERSECTION OF SINGLE CURVED SURFACES. 171 Each of the other planes, excejit X Y, being secant to both l:iases, will cut two elements fromeach cone, their mutual intersections giving four points of the curve of interpenetration. Thus, inplane 0 P, the element 0 e meets v k in g and v d in i;…
Mechanical drawing · Lettering
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