. Chemical engineering. the machine shop, and the poweris taken direct from the shafting, a $150 motor can be dispensedwith. If the outfit is put up at a mine, the gasoline blowerfrom the assay office will take the place of motor, fan, cylinderand torch. In fact, it is a question whether a good gasolinetorch would not be as safe, cheap and easy going as the outfitalready named. The Cast Iron Brazing Company estnnate their gas andpower cost at from 15 to 20 cents per hour for one burner, andabout 10 cents additional for each extra burner. A casting of,saj, 25-pound weight can be brazed in about
. Chemical engineering. the machine shop, and the poweris taken direct from the shafting, a $150 motor can be dispensedwith. If the outfit is put up at a mine, the gasoline blowerfrom the assay office will take the place of motor, fan, cylinderand torch. In fact, it is a question whether a good gasolinetorch would not be as safe, cheap and easy going as the outfitalready named. The Cast Iron Brazing Company estnnate their gas andpower cost at from 15 to 20 cents per hour for one burner, andabout 10 cents additional for each extra burner. A casting of,saj, 25-pound weight can be brazed in about one hour, countingcleaning before and after. The labor cost would be about 40cents. The approximate cost of a one-hour repair job, providedthe plant is in steady operation nine hours a day, is roughly asfollows: 6 per cent interest on $400 apparatus $ .01 ID per cent yearly depreciation on same 02 Rent $200, taxes, insurance 10 Power and gas 20 Labor 40 •73 Between this cost and the nveraxe \alue of the casting to be. IAIKKII MOTOR CYLINDER. substantial mended there is a very wide margin, allowingprofit. Whenever this brazing outfit is needed it is badly needed. Amine, or any isolated plant using machinery, is sure to be tiedup occasionally by the breaking of parts. Delay is always tre-mendously costly and exasperating. A trifling outlay, such asjust described, will prevent breakages from demoralizing theplant. Gas Velocity Recording Device. .\ new velocity gauge for gases, which is being placed on themarket by the Hydro Manufacturing Company, 720 LewisBlock, Pittsburgh, Pa., is interesting, as it is based on a novelprinciple. The gauge is shown in the adjoining diagram. The gas, thevelocity of which is to be measured flows through the flueshown on the right hand, in the direction of the arrow. Withinthe path of the gas the ends of two pipes, R, and R2, are open ends of both pipes are bent, but in opposite of Ri is bent opposite to the flow of the
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmetallu, bookyear1902
