. American engineer and railroad journal . FIG. 3.—APPLICATION OF CONSTANT SPEED MOTOR TO LATHE. -APPLICATION OF VARIABLE SPEED Motor to LARGER LATHES. lever at the front of the motor bracket, in-stant speed changes from high to low backgear, without changing a gear and while thetool is running. The back gear is arrangedto give a continuous speed range with a 3 to1 motor; if the motor is operated on themultiple voltage system, the lower voltagesare not required, resulting in a more power-ful drive, or making possible the use of asmaller motor. I he motor controller is of the drum type,and is b
. American engineer and railroad journal . FIG. 3.—APPLICATION OF CONSTANT SPEED MOTOR TO LATHE. -APPLICATION OF VARIABLE SPEED Motor to LARGER LATHES. lever at the front of the motor bracket, in-stant speed changes from high to low backgear, without changing a gear and while thetool is running. The back gear is arrangedto give a continuous speed range with a 3 to1 motor; if the motor is operated on themultiple voltage system, the lower voltagesare not required, resulting in a more power-ful drive, or making possible the use of asmaller motor. I he motor controller is of the drum type,and is bolted to the back of the lathe bed atthe tailstock end. ft is operated by a handle-il tin carriage, through a set of gears, asplined shaft and chain drive, as shown. On the larger lathes, which require a great-er speed range, the motor is applied as shownin Fig. 2. The motor pinion drives a raw-bide gear, mounted on a short shaft, withbearings in the gear cover case. The raw-hide gear drives a double friction shaft abovethe spindle and
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
