. The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing. . theright hand of fig. 1, so as to carrychange-wheels when necessary,and H and i have intermittentratchet-feeding movements at theopposite end, similar to that at e,for working the these are worked by the re-versing bar in connection withthe screw, k. An ordinary re-versing movement, M, is interposedbetween the guide-screw, e, andits driving-wheel, for reversingthe motion in sliding and scr
. The practical draughtsman's book of industrial design, and machinist's and engineer's drawing companion: forming a complete course of mechanical, engineering, and architectural drawing. . theright hand of fig. 1, so as to carrychange-wheels when necessary,and H and i have intermittentratchet-feeding movements at theopposite end, similar to that at e,for working the these are worked by the re-versing bar in connection withthe screw, k. An ordinary re-versing movement, M, is interposedbetween the guide-screw, e, andits driving-wheel, for reversingthe motion in sliding and screw-cutting. When the lathe is usedfor surfacing, this reversing motionis better applied on the driving-shaft, a. Hand adjustments, notshown in the figure, are applied to the boxes of the guide-screw, g,and of the screws of the vertical and transverse slides of the slide-rest. A composite lathe, thus geared, may be applied to all theordinary descriptions of work. For sliding, boring, and screw-cutting, the mandrel is worked by the pinion, c, whilst change-wheels connect a with g. The height of the tool for turning isconveniently adjusted by the vertical slide of the slide-rest. Sup-. pose it is desired to stop the lathe at any particular point whenthe attendant is absent, the screw, k, is put in gear by its clutch,and by means of a detent stop-movement, it stops the lathe atthe precise point, by throwing the belt off the fast pulley on theend of A, which travels with considerable rapidity. If it berequired to turn a long cone of greater taper than can conve-niently be done by traversing the following head-stock, the cut-ting-tool is set over the work by raising the vertical slide by itshand adjustment, whilst g and i are also connected by change-wheels, so that the slide rises or falls with the cut. K a con-necting-rod is to be barrelled, the crank-pin of the differentialapparatus is adjusted for eccentricity to suit the rise of the sweep,and L is connected with g by the change-
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Keywords: ., bo, bookcentury1800, bookdecade1850, booksubjectmechanicaldrawing
