John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 397
nce formed in one casting with a frame fig. 424, which is provided with two screws the points of which enter appropriately- placed holes in a diametrical line on either side of the front of the lathe head. The mandrel nose passes through a wide elongated aperture in the frame, and the ring is… … aperture into the face of the lathe head with the larger chucks for additional stability. The back consists of an oblong metal plate with parallel edges fig. 425, having a central screw for the mandrel, and it is contained by and slides freely between two flat bars immovably connected together by…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten12unit-108-0.webp)
