Compressed air . eparated fromthe water in which it had been entrained,and with which it had been carried to thebottom of the shaft. From the air reser-voir over the separator, a 16-inch leadingmain rises to the surface, and is laid to-ward Norwich, conveying air under about90 pounds pressure for the use of the en-gines at the several establishments em-ploying it for power. A general idea of Fig. 9 is a view of the head wall, witha portion of the dam, looking diagonallydown-stream, during the construction ofthe separator. After the steel work had been com-pleted, all the false works and access
Compressed air . eparated fromthe water in which it had been entrained,and with which it had been carried to thebottom of the shaft. From the air reser-voir over the separator, a 16-inch leadingmain rises to the surface, and is laid to-ward Norwich, conveying air under about90 pounds pressure for the use of the en-gines at the several establishments em-ploying it for power. A general idea of Fig. 9 is a view of the head wall, witha portion of the dam, looking diagonallydown-stream, during the construction ofthe separator. After the steel work had been com-pleted, all the false works and accessorieswere removed, and water was turnedthrough the apparatus. When the compressor is in full opera-tion, entraining the air and supplying itto the air chamber and leading main, thecollection of air may be more rapid thanits withdrawal for use in engines, or forother purposes. To avoid the disturbancewhich would be likely to occur if the ac-cumulated volume in the air chambershould force the line of separation be-. sts e ElevaiJop» FIG. 5. the shaft, down-flow pipe, separator, lead-ing main, etc., can be obtained fromFig. 8. In sinking this shaft through the ledge,below the bed of the river, it was foundthat the upper portion was not suf-ficiently strong to serve for the permanentwalls of the shaft, and for a considerabledistance the excavation was lined withconcrete, formed by filling a space be-tween curbing, inserted for the purpose,and the surface of the ledge as excavated. After the shaft and its appurtenanceshad been completed, the erection of theiiead tank, downflow pipe, and separator,formed of steel, was proceeded this time, the flow of the river, atwhatever stage, was passed over the dam,or through a sluiceway. tween the air and water below the bottomof the downflow pipe, and thus allow ofan eruption of air through the downflowpipe and head piece, provision is made fora blow-off, or escape of air to the atmos-phere, through a blow-off pipe, having anapertu
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896
