A history of the growth of the steam-engine . nt of water with the steam. This type of steam-boiler, invented by Nathan Read, of Salem, Mass., in 1791,and patented in April of that year, was the earliest of thetubular boilers. In the locomotive boiler (Fig. 109), as inthe preceding, the characteristics are a fire-box at one endof the shell and a set of tubes through which the gases pass 342 THE STEAM-ENGINE OF TO-DAY. directly to the smoke-stack. Strength, compactness, greatsteaming capacity, fair economy, moderate cost, and con-venience of combination with the running parts, are securedby the
A history of the growth of the steam-engine . nt of water with the steam. This type of steam-boiler, invented by Nathan Read, of Salem, Mass., in 1791,and patented in April of that year, was the earliest of thetubular boilers. In the locomotive boiler (Fig. 109), as inthe preceding, the characteristics are a fire-box at one endof the shell and a set of tubes through which the gases pass 342 THE STEAM-ENGINE OF TO-DAY. directly to the smoke-stack. Strength, compactness, greatsteaming capacity, fair economy, moderate cost, and con-venience of combination with the running parts, are securedby the adoption of this form. It is frequently used alsofor portable and stationary engines. It was invented inFrance by M. S6guin, and in England by Booth, and usedby George Stephenson at about the same time—1828 or1829. Since the efficiency of a steam-boiler depends upon theextent of effective heating-surface per unit of weight offuel burned in any given time—or, ordinarily, upon theratio of the areas of heating and grate surface—^peculiar. Fio. 109.—stationary Locomotive Boiler. expedients are sometimes adopted, having for their objectthe increase of heating-surface, without change of form ofboiler and without proportionate increase of cost. One of these methods is that of the use of Gallowayconical tubes (Fig. 110). These are very largely used in
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Keywords: ., bookcentury1800, bookdecade1870, bookidc, booksubjectsteamengines
