John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 525
may be returned at either or both extremities by utilizing the vertical revolution of the cutter, and the entire length of any such returned curve is also produced continuously as one cut. When the returned or concave portion is added below the diametrical line a, d, which position will be… … such portion, while the mandrel is fixed by the index or held by the hand laid on the pulley so that one segment pin is in contact with the stop, and then when the tool has entered to a sufficient depth for the concave cutting, the mandrel is released and moved through its partial rotation to…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
