John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 554
520 CONCAVE AND EDGE Concave oval sections the reverse of fig. 522, are obtained when the two chucks have their slides at right angles with that of the spherical horizontal. The line a, d, in the diagram fig. Fig. 526. Fig. 525. … 526, as before, indicates the horizontal and b, c, the vertical plane through the mandrel, the oval ring receives eccentricity equal to half the difference between the two diameters of the section, and the work previously prepared hollow to its ap- proximate form is carried away to the right of b,…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
