hird centre. From P through E draw PET. NT is thethird part of the curve. From E with a radius ET carry thecurve to the line DC, and repeat the operation for the otherhalf of the curve. Draw a semicircle on the diameter AB forthe other part of the oval. The cycloid is the path described by any… … 48 GBOMETKICAL PROBLEMS. A hypocycloid is the path described by any point in the cir-cumference of a circle which rolls along the inside of anothercircle. The rolling circle is called the generatrix, or generating cir-cle, and the line (straight or curved) on which it rolls is calledthe directrix.…
Mechanical drawing
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