Jamison, Alpha Pierce. [from old catalog] · New York, J. Wiley & sons; · leaf 148
s the hypocycloid. GEARING. 129 The manner of constructing the curve is identical with thatgiven for the epicycloid, as is clearly evident from Fig. 58. The Involute.—Fig. 59. If a straight line, or to be consistent,a circle of infinite radius be rolled around the outside of a fixedcircle, every… … Fig. 59. To construct the curve, draw the circle 1-2-3, e^c-) and divideits circumference as shown; at each of these points of divisiondraw a tangent to the circle, then lay off the lengths 2-1 equalto the arc 2-1, 3-1 equal to .the arc 3-1, etc.; that is, beginningat a certain point, the length of…
Mechanical drawing
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