. The railroad and engineering journal . m,there meeting the discharge from the vertical design of boiler looks toward a complete, or nearlycomjilete. conversion of the water into steam before itreaches the steam-drum. The object of this later designis to produce a boiler which will not require as close at-tention to the feed supply as did the original Ilerreshoffcoil boiler. •Jill- lIlORNVCRnFT This boiler, shown in figs. 5, 6 and 7, consists of a hori-zontal drum or separator at the top, placed longitudinallyover the center of the grate ; two smaller horizontal 1 ylin-
. The railroad and engineering journal . m,there meeting the discharge from the vertical design of boiler looks toward a complete, or nearlycomjilete. conversion of the water into steam before itreaches the steam-drum. The object of this later designis to produce a boiler which will not require as close at-tention to the feed supply as did the original Ilerreshoffcoil boiler. •Jill- lIlORNVCRnFT This boiler, shown in figs. 5, 6 and 7, consists of a hori-zontal drum or separator at the top, placed longitudinallyover the center of the grate ; two smaller horizontal 1 ylin-ders on either side of the grate, a number of steam gener- Vol. LXIV. No. 8.] ENGINEERING JOURNAL. 347 ating tubes, connecting the upper part ot the circumfer-ence of the smaller cylinders with that of the separator,and of two downcast pipes outside of the furnace, con-necting the separator with the wing cylinders, these pipesbeing for the sole purpose of supplying water to the wingcylinders. The greater number ot the generating tubes. to the top of the drum is placed the dry-pipe leading to thestop-valve on the front of the boiler. The wing cylindersare protected from the direct heat of the furnace by thetire-bricks, which form the sides of the grate. In case ofa tube giving out, it can be readily plugged from the in-side of the drums, and as the heating surface is relativelylarge in this type of boiler, quite a number of the tubescould be so treated without seriously impairing the effi-ciency of the boiler. THE TOWNE BOILER. This boiler is of rectangular form, as shown in and 9. It is provided with a steam-drum or separator,which is connected with the boiler proper at the top bymeans of downcast pipes. The horizontal tubes are screwedinto the drum, as shown, and expanded in the tube latter are bent or inclined to meet the generatingtubes, which make an angle of 30 with the vertical. Thespacing of these tubes will be readily understood from theplate.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
