Blueprint reading; a practical manual of instruction in blueprint reading through the analysis of typical plates with reference to mechanical drawing conventions and methods, the laws of projection, etc (1919)
Fairfield, Howard Parker, 1858-, Kenison, Ervin, Waite, Edward B. (Edward Broughton), 1873-, American Technical Society · Chicago, American technical society · leaf 248
ine passingthrough the center of the base; hence the horizontal projection ofc and d will be found on this center line, and will be the extremeends of the curve. The plane x cuts the surface of the cone in a circle, as it is parallelto the base, and the diameter of the circle is the distance… … Fig. 139. Ellipse—Section from a Cone 169 ^ 104 MECHANICAL DRAWING the surface of the cone, and their vertical projections intersect atthe points 2-2. Point 2 on the elevation then represents two pointswhich are shown in plan directly above on the circle x, and arepoints on the required…
Mechanical drawing · Blueprinting
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