Mechanical drawing : a manual for teachers and students (1902)
Cross, Anson Kent · Boston : Ginn & Co. · leaf 192
d the exact points for the curvesof the chamfer, as he knows the appearance and can give it by eye ; but itis well that students should know how to obtain the correct points. Fig. 142. A spring or a pipe of helical for^n. Make the drawing of the helical curve, which is the centre line of thespring,… … DEFINITIONS. Altitude. The perpendicular distance between the bases, or betweenthe vertex and the base, of a sohd or plane figure. Angle. The difference in direction of two lines which meet or tend tomeet. The lines are called the sides^ and the point of meeting, the vertexof the angle. An angle is…
Mechanical drawing
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