. Machinery and processes of the industrial arts, and apparatus of the exact sciences. dischargesthe air received at the centre through a tangential outlet. The details Fiff. 58. of internal construction too closelyresemble those of Appolds pump torender further explanation necessa-ry. The figures represent the uXoise-less Fan* of Mr. George Lloyd, ofLondon. Its recommendations arethe silence with which it works andthe volume of air which it Lloyd constructs a number ofmodels varying in size from thirteeninches to four feet in diameter. Thesmallest are driven with the velocityof e
. Machinery and processes of the industrial arts, and apparatus of the exact sciences. dischargesthe air received at the centre through a tangential outlet. The details Fiff. 58. of internal construction too closelyresemble those of Appolds pump torender further explanation necessa-ry. The figures represent the uXoise-less Fan* of Mr. George Lloyd, ofLondon. Its recommendations arethe silence with which it works andthe volume of air which it Lloyd constructs a number ofmodels varying in size from thirteeninches to four feet in diameter. Thesmallest are driven with the velocityof eighteen hundred or two thou-sand feet per minute, and the larg-Liovds Noiseless Fan. est eight hundred or one thousand. As furnace blowers, the smallest will melt six hundred-weight of iron inone hour, and the largest one hundred and twenty an exhauster of foul air in mines, this machine is used without thesurrounding box. The tube of aspiration being connected with the cen-tre of the drum, the air drawn up is discharged from the circumferenceinto the schieles co^lpoend blowing fan. Blowing machines of similar character were exhibited by the NorthMoor Foundry Co., of Oldham, England, being the inventions of and Schiele. A remarkable one among these was called the Com-pound Fan, designed for high-pressure blasts. In this, two fans, re-sembling in general the fan of Lloyd above described, were combined onthe same shaft, so as to act successively on the same air. By the firstthe air is driven into a chamber between the fans, at a pressure of per-haps six ounces. The second receives the air at this pressure and com-presses it at much more, so that it is delivered at length into the fur-nace at a pressure of twelve ounces per square inch. The advantages ofthese fans for reverberating furnaces are stated to be— First. Great saving in fuel, the consumption being less for a giveneffect in proportion as the pressure of the blast is increased
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Keywords: ., bookcentury1800, booksubjectmachinery, booksubjectscientificappa
