Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 269
iu Z3 t> 3 … When the screw-head of a lathe-dog is provided with a hole whereby to tighten it, a suitable leveris required. Such a tool is shown in Fig. 2660, the ends A and B being slightly tapered, and thebend at C being to facilitate the movement of the lever in confined places, where only a quarter turnor…
Mechanical engineering -- Dictionaries
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.