. Journal . A])ril 3, is forced by a fan into a chamber situated in frontjf the furnace and which can be put into communication. by means of valves or slides, with the ash-pit of the furnace,with a series of perforated heating tubes which supplysecondary air to complete the combustion of the gases,and with a chamber or chambers from which the airpasses through the heating tubes proper, placed in the pathof the products of combustion. The heated air jiasscsfrom the heating tubes to one or more chambers situatedbetween the heating tubes and the chamber supplying 510 Cl. I.—plant, appara
. Journal . A])ril 3, is forced by a fan into a chamber situated in frontjf the furnace and which can be put into communication. by means of valves or slides, with the ash-pit of the furnace,with a series of perforated heating tubes which supplysecondary air to complete the combustion of the gases,and with a chamber or chambers from which the airpasses through the heating tubes proper, placed in the pathof the products of combustion. The heated air jiasscsfrom the heating tubes to one or more chambers situatedbetween the heating tubes and the chamber supplying 510 Cl. I.—plant, apparatus, & MACHINERY. piay 31. loot. air thereto, being in this way protected from loss of heatby radiation. The air supply chamber is of such a sizethat an effective pressure can be maintained thereinso as to cause an even distribution of air through thetubes.—W. H. C. Classifiers or separators for materials o/ different specificgravities. C. Churchill, Boston, Mass. 7841, April 8, The materials to bo separated are delivered alonp with astream of water into the bottom of the cone. a. throughthe pipe. I). The cone is provided with propeller blades,n, the pitch of n liieh increases from the bottom upwards ;these blades are mounted on the hollow shaft. ?«, which iafree to rotate about a tixed shaft, j, supjiorted by thefram?s, i, li. The cone is also provided with an overflowgutter. /. and with several valved outlets, o. lixed atdifferent levels. The liow of the water causes the propellerblades to rotate and sets up centrifugal force within thecone. The lighter particles are carried upwards and overthe top of the cone into the gutter, /, and the heavierparticles are drawn off at different levels according to theirspecific gravities.—\V. H. C. Separating liquid and dirt from gases and steam by meansof oblique currents, separators and catch O. Klauser, London. From C. F. Scheer und Co.,Feuerbach, (Jerniany. Eng. Pat. 8208, April 13, 1908. 12- r
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
