. American engineer and railroad journal . U. & W. Piston Air Drill. ing through the medium of arms and cross-heads upon a sin-gle shaft, turning it with the power derived from both cylin-ders. In order to effect this concentration of power a gearis placed between the cross-heads, working in racks cut at thebase of each. The successive strokes of the cross-heads movethe ends of the arms up and down. The other ends of thesearms encircle the shaft and have teeth interlocking those inclutches, which, in turn, move along the shaft and engagelugs on it, thus revolving the shaft. The teeth of the ar
. American engineer and railroad journal . U. & W. Piston Air Drill. ing through the medium of arms and cross-heads upon a sin-gle shaft, turning it with the power derived from both cylin-ders. In order to effect this concentration of power a gearis placed between the cross-heads, working in racks cut at thebase of each. The successive strokes of the cross-heads movethe ends of the arms up and down. The other ends of thesearms encircle the shaft and have teeth interlocking those inclutches, which, in turn, move along the shaft and engagelugs on it, thus revolving the shaft. The teeth of the armsand clutches never engage except on the forward stroke, orat the time of the upward movement of the end of the air enters the cylinders at the end of each stroke, it willbe seen that the gear referred to above is of great importance,inasmuch as it is the medium of transmission of the powerdeveloped in the return stroke to the side on the forward orworking stroke. Two valves and a shifter distribute the air. The auxiliaryvalve
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
