. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . The whole rests on the concrete foundation of the pit. The journal at the upper end of the screw is 4 in. indiameter and runs in a phosphor bronze bushing boredwith a clearance of .0035 in. Above this, the screw centeris turned to a diameter of 3% in. and cut with a keywayfor the reception of the driving gear. The screws are driven by a 10 horsepower motor run-ning at a speed of 450 revolutions per minute. This isgeared down by means of spur and level gearing so asto give a rotation of r
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . The whole rests on the concrete foundation of the pit. The journal at the upper end of the screw is 4 in. indiameter and runs in a phosphor bronze bushing boredwith a clearance of .0035 in. Above this, the screw centeris turned to a diameter of 3% in. and cut with a keywayfor the reception of the driving gear. The screws are driven by a 10 horsepower motor run-ning at a speed of 450 revolutions per minute. This isgeared down by means of spur and level gearing so asto give a rotation of revolutions per minute at thescrews which, in time, makes it possible to raise or lowerthe table through the whole height of its normal lift in alittle more than 61 j minutes. This operation is controlledby a push button switch mounted on one of the columnsadjacent to the pit. With this arrangement it is possibleto control the movement of the table either up or downwithin a small fraction of an inch and its speed in eitherdirection is alwavs uniform. 134 RAILWAY AXD LOCOMOTIVE ENGINEERING May, 1924.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectrailroa, bookyear1901
