. The Street railway journal . an electrically driven air compressor which ismounted on a car, and which is used in track work. On themotor shaft is mounted an emery wheel for grinding trackdrills and other tools. When the compressor is used fordrilling rails it is removed from the track and the lengths of section of track to the ground and make hose connectionswith a hydrant. In city track work it is customary to stationthe machine at one point and to carry the concrete for 1000ft. or more to the point at which it is to be used by means ofthe derrick car previously described. A bucket of the
. The Street railway journal . an electrically driven air compressor which ismounted on a car, and which is used in track work. On themotor shaft is mounted an emery wheel for grinding trackdrills and other tools. When the compressor is used fordrilling rails it is removed from the track and the lengths of section of track to the ground and make hose connectionswith a hydrant. In city track work it is customary to stationthe machine at one point and to carry the concrete for 1000ft. or more to the point at which it is to be used by means ofthe derrick car previously described. A bucket of the samecapacity as the drum of the concrete mixer is hung to thecrane of the car and the contents of the drum are dumpeddirectly into this, as may be seen in Fig. 6, which is a view ofthe mixer at work upon the street. Crushed stone for the concrete used in city track construc-tion is hauled into the city over the companys interurbanlines. A fourteen-car train of stone is shown in Fig. 7. Ten . .. [... ;/: — ,. _!< . • _S.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
