Ornamental turning : a work of practical instruction in the above art (1880)
Evans, J. H. (John Henry), lathe-maker · London : J.H. Evans · leaf 217
THE DOME OR SPHERICAL CHUCK. 164 screw and frame are made so that the former can be move in and out of gear; the frame is hinged to the side of the arm by a screw seen on the left-hand side, and a milled-head thumb-screw passes through a curved slot in the opposite side; the screw entering the… … the tangent-screw [is* then returned to gear and fixed by the thumb-screw. As an instance of the advantage of this improvement, it may be presumed that it is desired to cut a square base ; as one turn of the screw moves the wheel through the space of one tooth, it will require twenty-four complete…
Turning (Lathe work)
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
