John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 356
plate carrying the vibrating tool slide is set in revolution by means of a second worm wheel and tangent screw with a pulley for the band from the overhead motion at the rear end of the stem, and the slide then gently traverses to and fro compelled by the contact of the roller as that travels… … portion of the end of the tool slide. When the stop screw is unemployed the roller descends to the full depth of every wave, and when it is sufficiently advanced it extends the spring and carries the roller completely off the rosette, in which case tbe tool cuts a plain circle of a diameter that is…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
