Compressed air . supply both the hoist and the pumpwhen making only 35 In other words,the single-cylinder pump used 130 per cent,more air than the compound pump and thefeed-water heater. The amount of compressed air required COMPRESSED AIR. 4073 could have been still further reduced if apump of the fly-wheel type had been especiallydesigned for this case, with water-jacketedcylinders and discharge pipes, in which casethe expansion could have been carried muchfurther without danger of freezing. It goeswithout saying that the installation of a heat-er, which would have brought the tempera
Compressed air . supply both the hoist and the pumpwhen making only 35 In other words,the single-cylinder pump used 130 per cent,more air than the compound pump and thefeed-water heater. The amount of compressed air required COMPRESSED AIR. 4073 could have been still further reduced if apump of the fly-wheel type had been especiallydesigned for this case, with water-jacketedcylinders and discharge pipes, in which casethe expansion could have been carried muchfurther without danger of freezing. It goeswithout saying that the installation of a heat-er, which would have brought the temperatureof the air up to 350 deg. before it entered eith-er cylinder, would have reduced the amount ofair the compressor had to supply for this pump enough to make compressed air the most de-sirable motive power for the majority of un-derground pumps. CLEANING THE HIPPRODROME BY VACUUM PROCESS The accompanying illustration shows thewagons of the Vacuum Cleaner Company up-on the stage of the New York Hippidrome. This. to one-third of the quantity required for thesingle-cylinder pump using cold air. Thecost of installing a pump and heater, such asjust described, would not exceed the cost ofa single-cylinder pump by more than about 50per cent., which difference would be more thansaved in the lirst two months. I believe that, while not showing anythinglike as high efficiency in test runs as wherereheaters are used, which bring the tempera-ture up to between 300 and 400 deg., thismethod of using compressed air will be foundthe most satisfactory for general undergroundpumping, especially in cases where smallpumps are required, and that it is efficient great playhouse is cleaned at regular intervalsby the vacuum system, which is probably themost sanitary method of extracting dust fromcarpets, cushions, floors, walls, withoutdisseminating it in the air. ihe Hippodrome,however, is not the only theatre which hasadopted this method of cleaning, as many ofthe leading theatres in New York
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectcompres, bookyear1896
