John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 423
E EQUAL DIVISION OP THE ELLIPSE. 397 lengthens one and correspondingly abstracts from the succeed- ing portions of the curve when these are measured or intersected by the eight or other equal movements of the mandrel by the division plate. This quadruple variation so visible in fig. 439, is… … motion is so arranged that where the divisions upon the work are too approached, the movable index point travels in the same direction as the division plate, in which case its motion is added to that of the mandrel and thus increases the width of the spaces, and where they are too distant, it moves…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
