. Factory and industrial management. ater-tube boiler,the boiler efficiency secured was per cent., and the evaporation ofwater from and at 212° per pound of coal was pounds. Tests withthe Hodgkinson stoker on a Hornsby boiler in competition with handfiring showed a gain for the mechanical stoking of pound water perpound of coal. The McDougall and the Auld stokers are generally similar toVicars, and a test of the former by Mr. R. B. Longridge showed again in evaporation over hand firing of 8 to 12 per cent. The Cassstoker, which has a flat grate, is spoken of as being very effic
. Factory and industrial management. ater-tube boiler,the boiler efficiency secured was per cent., and the evaporation ofwater from and at 212° per pound of coal was pounds. Tests withthe Hodgkinson stoker on a Hornsby boiler in competition with handfiring showed a gain for the mechanical stoking of pound water perpound of coal. The McDougall and the Auld stokers are generally similar toVicars, and a test of the former by Mr. R. B. Longridge showed again in evaporation over hand firing of 8 to 12 per cent. The Cassstoker, which has a flat grate, is spoken of as being very efficient. TheFalmorden stoker, by Ha worth and Horsfall, has a coking chamberbuilt of firebrick between the hopper and the boiler front; the fuel isagitated by toothed rakes which rise between the grates and cut thefuel, moving two inches at a time. Meldrums Kokerstoker has been used at a rate of combustion as high as 40 pounds persquare foot of grate per hour, giving per cent COj and percent. O in the escaping SIDE SECTIONAL ELEVATION OF RANSOMES & RAPIER STRIUMPH STOKER. J THE ECONOMY OF MECHANICAL STOKING. 541 e. Sprinkler stokers :— In the Triumph stoker, made by Ransomes & Rapier, the coal de-scends from the hoppers into a box containing an adjustable slide hav-ing a reciprocating movement. At regular intervals this allows coalto fall on a shovel, which by a cam, trigger, and spring is drivensharply forward but with a varying throw, so that the coal is uni-formly distributed over the grate. The firebars have a come and gomotion of about 2 inches, being drawn forward by two and two insuccession, and then after a slight pause, all pushed back this means the clinkers and ashes are caused to travel backwarduntil they finally fall from the extremity of the bars into the ashpit Aseries of small steam jets helps to keep the bars cool and to increasethe draught. In a twelve-hour test, burning South Hetton unscreenedcoal (bean small) in a Gallow
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
