forms a circle less than the former by the depth of thegroove. Let a ring of brass, cast iron, or east steel, be made tocorrespond in magnitude and form with this groove, and let it bedivided, as represented in fig. 13, into four segments cccc, andfour corresponding angular pieces, dddb, Let the… … PI8T0KS. in fig. 12 and fig. 13. Tliese springs will abut against the solidcentre of the piston, and will urge the segments c against thecylinder. The spiral springs which urge the wedges are confinedin their action by steel pins which pass through their centre, andby being confined in cylindrical…
Steam-engines · Steam-navigation · Locomotives
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![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten15unit-625-349.webp)
