Logarithmic Spiral Curve French Curves
A Logarithmic Spiral French curve, or irregular curve, is used to draw short elliptical radius curves by using points. The log curve is approximately closely shaped to a cycloid and other mathematical curves.
KeywordsRuler, rulers, curve ruler, curved ruler, curve rulers, Logarithmic Curve French Curves, Logarithmic Curve Irregular Curve, log curve ruler
GalleriesMechanical Drawing Tools
French, Thomas E A Manual of Engineering Drawing for Students and Draftsmen (New York, NY: McGraw-Hill, 1911)