The Civil engineer and architect's journal, scientific and railway gazette (1839)
London : [William Laxton] · leaf 193
The main feature of the generating curve for such a siirface isthe equality of all tangents drawn to the axis. Hence tlie use ofan instrument I constructed as shown in tig. 2, A, ami B, where thecurve is described by a little drawing-pen moving on a liorizontalplane. Figs. 3 to 6 show some examples… … Fig. 3.—B. Fig. 3, A and B, represent two stop-cocks, which from theirshape may be called ie/?-cocks. They have none of the imperfec-tions of those now in use, while they possess the natural tendencyof insuring tightness by wear. Fig. 4 represents part of a regulator for a locomotive engine,…
Architecture · Civil engineering · Science
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
