Practical mechanical drawing and machine design self taught .. (1907)
Westinghouse, Charles. [from old catalog] · Chicago, F. J. Drake & co. · leaf 58
inder of theellipse in the same manner. Having given an axis CD and chord FH as inFig. 128. From F draw F4 parallel to CD, divideit into any number of equal parts, in this casefour. Divide the half chord FE into the samenumber of equal parts, through these points andextremities of given axis draw… … Fig. 129—The Parabola. fixed point shall be constantly equal to its dis-tance from a given straight line. Point F in Fig.129 is the focus, CD is the given straight linecalled the directrix, and AB, a perpendicular toCD through F, is the Axis V, the intersection ofthe axis with the curve, is the…
Mechanical drawing · Machine design
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