. American engineer and railroad journal . to here illustrateanother similar machine of the same make. This tool, illus-trated in Fig. 11, is the No. 6 Bement, Miles & Co. horizontalmilling machine, which has a capacity of milling to a size ofbi /^ X ZlVo inches. It is equipped with their standard arrangement of motor driv-ing in which a gear box is used for obtaining variable gear box is clearly shown at the right and in front of themotor, which is a Crocker-Wheeler direct-current constant-speed motor. A wide range of driving speeds are provided bythis gear box, thus making a very
. American engineer and railroad journal . to here illustrateanother similar machine of the same make. This tool, illus-trated in Fig. 11, is the No. 6 Bement, Miles & Co. horizontalmilling machine, which has a capacity of milling to a size ofbi /^ X ZlVo inches. It is equipped with their standard arrangement of motor driv-ing in which a gear box is used for obtaining variable gear box is clearly shown at the right and in front of themotor, which is a Crocker-Wheeler direct-current constant-speed motor. A wide range of driving speeds are provided bythis gear box, thus making a very flexible drive. One of the latest and neatest schemes for providing millingmachines with a contained motor drive is illustrated In It represents the geared-feed milling machine, built by theBrown & Sharpe Manufacturing Company, corresponding veryclosely with its No. 1 universal milling machine. Power issupplied by a Crocker-Wheeler semi-inclosed shunt-wound motorand the speed regulation is afforded by a Crocker-Wheeler 12-. FIG. 10.—REAR VIEW OF THE INGEBSOIX MACHINE, SHOW-ING AKBANGEMEKT OF MOIOB AND DEIVE. 462 AMERICAN ENGINEER AND RAILROAD JOURNAL. This tool was designed especially for light rapid work, suchas the finishiug of small brass parts, so that it required a motorof only 3 The speed reduction fropi motor to tool is about31A: 1, the lowest speed of the motor rotating the spindle at44 rev. per rain., and the highest speed at 276. With the ex-treme limits of the table travel, the machine requires a floor
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
