John Jacob Holtzapffel · digital reprint by www.CircuitousRoot.com · leaf 110
84 THE QUADRANT. slackening the binding screw the mainslide may be at once placed at all horizontal angles from that of parallel with, to that of right angles to the mandrel axis. The quadrant at all times convenient, is more especially serviceable in those frequent cases where the curvatures upon… … The counting ratchet fig. 59, is a late addition to the slide- rest constructed by the author to effect the accurate traverse of the tool to definite distances along the mainslide, for many repetitions of a cut, and to avoid the necessity of constantly inspecting the divisions of the micrometer of…
Ornamental turning
Internet Archive · Dr. David M. MacMillan · Public Domain Mark 1.0. Free to use for anything.
