Essentials of drafting; a text and problem book for apprentice, trade and evening technical schools (1918)
Svensen, Carl L. (Carl Lars), 1884- · New York, D. Van Nostrand company · leaf 42
Projecf/orrL/ne ■^\_Pn)Jec/-/on L/ne F/g. S9 ing through the glass, we consider that Hnes have been drawnfrom every point in the object perpendicular to the verticalplane, the object is said to be projected out to the verticalplane. The lines are- called projection lines. By joining the PROJECTIONS… … Fig. 60 to the horizontal plane. If the joint between the two planes isnow taken as an axis, the horizontal plane may be revolved upabout the axis until it is in the same plane with the verticalplane. This brings the top view directly above the front view. By placing a I j—. j- third glass plane ^…
Mechanical drawing
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