Elementary projection drawing. Theory and practice. For preparatory and higher scientific schools, industrial and normal classes; and the self-instruction of teachers, inventors, draftsmen, and artisans. In six divisions .. (1880)
Warren, S. Edward (Samuel Edward), 1831-1909 · New York, J. Wiley & sons · leaf 181
y, and in a direction making an angle of 45° with thepaper. And, generally, in oblique projection, the direction ofvision=the projecting lines, may have any direction (the same forall points in the same problem) making an angle of ±5° with theplane of projection. Hence FA may have any direction… … Fig. 3. Pig. 3a. / / c hL..£ ~7 / $ / » 1 V I . / E ^a D Fig. 4. y^ H, c DFig. 5. OBLIQUE PROJECTIONS. 109 In Fig. 6, CDK = 60°. Accordingly DK=|DC, from which,having found K, the perpendicular KC can be drawn to limit DC.Or, as before, CK=i v% DC being =1. That is, CK = |EC, sinceCDE = 120°. And…
Geometrical drawing · Mechanical drawing
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