. Factory and industrial management . FIG. 9. PNEUMATICALLY OPERATED TL RN-TABLE. THE USE OF COMPRESSED AIR. 663 The air-using appliances are all operated by a man stationed at thebase of the derrick, by means of three four-way cocks. The plough,proceeding at the rate of four miles per hour, will cut a furrow twenty-nine inches deep by thirty-six inches wide. This outfit (Fig. 10),will perform work in one day at a cost of less than $20 which wouldcost not less than $500 by former methods. All kinds of painting where large surfaces have to be covered, asis the case with freight cars, buildings,
. Factory and industrial management . FIG. 9. PNEUMATICALLY OPERATED TL RN-TABLE. THE USE OF COMPRESSED AIR. 663 The air-using appliances are all operated by a man stationed at thebase of the derrick, by means of three four-way cocks. The plough,proceeding at the rate of four miles per hour, will cut a furrow twenty-nine inches deep by thirty-six inches wide. This outfit (Fig. 10),will perform work in one day at a cost of less than $20 which wouldcost not less than $500 by former methods. All kinds of painting where large surfaces have to be covered, asis the case with freight cars, buildings, bridges, and ships, may bedone by compressed air, which blows on a spray of paint and pene-trates interstices much better than the hand can do it. Much time issaved, and the necessity of costly brushes, skilled labor, and scaffold-ing is done awav FIG. 10. PNEUMATIC DIICHING AND GRADING MACHINE. At the present time the use of compressed air for street cars is ex-citing the greatest attention. Trials of these cars under actual work-ing conditions are now in progress both on surface and elevatedtracks in New York, Chicago, and Washington. The compressed-airmotor-car shown in Fig. 11 has been in successful operation on OneHundred and Twenty-fifth street. New York city, for several months,making in daily service seventeen miles without recharging, under theidentical conditions met by trolley or cable service, and has conclu-sively demonstrated its ability to meet all requirements. In fact, themakers of these cars guarantee that a line equipped with them can bemaintained and operated at a cost per car mile not exceeding that re- 664 THE USE OF COMPRESSED AIR.
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Keywords: ., bookcentury1800, bookdecade1890, booksubj, booksubjectengineering
