. Electric railway journal . d not require a press fit. No bedplate was thought necessary for holding thismachine in alignment. The stationary parts are veryheavy and are bolted down to separate foundation pierswhich are joined together at the bottom by masses ofconcrete and at the top by the reinforced-concrete machine foundation piers all rest on a single con-crete slab about 32 ft. long, 22 ft. wide and 1 ft. thick,reinforced with old 60-lb. rails. The exciter for the field of the alternator is a machine, which had formerly been beltedthrough a pulley on the engin
. Electric railway journal . d not require a press fit. No bedplate was thought necessary for holding thismachine in alignment. The stationary parts are veryheavy and are bolted down to separate foundation pierswhich are joined together at the bottom by masses ofconcrete and at the top by the reinforced-concrete machine foundation piers all rest on a single con-crete slab about 32 ft. long, 22 ft. wide and 1 ft. thick,reinforced with old 60-lb. rails. The exciter for the field of the alternator is a machine, which had formerly been beltedthrough a pulley on the engine shaft. In the new sub-station this exciter is driven through an inclosed silentchain by a 40-hp. induction motor. The old pillow blocks are fitted with the four-partbabbitted bearings and adjusting wedges with whichthey were originally provided, so that close adjustmentis possible. The two new outboard ring-oiling bearingsare adjustable vertically by means of shims and horizon-tally by means of adjusting bolts. r~ -27-10--. New outboar0_bearing k X= bushing shrunk onshaft to completeArmature fits New outboardbearing -ir-—- -/2-3h- -~8-9f- ASSEMBLY OF THREE-UNIT MOTOR-GENERATOR SET SHOWNIN ANOTHER ILLUSTRATION The bearings of the old Corliss engine were used for center bearings, and twonew bearings ordered for outboard bearings. The old Corliss engine shaft cut in twoserved for the two direct-current machines. A second-hand shaft was found for thealternator. Cast-iron bushings of suitable diameter were shrunk on these shafts tofit the bore of the three machines, and steel bushings were used to enlarge the shaftand provide new journal surfaces in the center bearings. Note the concrete pedestalsor pads necessary to bring the bearings and machines in correct alignment. The machine went into permanent operation aboutSept. 1, 1919, and has since given very satisfactoryservice excepting for a period of several weeks duringthe summer of 1920, when one of the main pillow-blockbe
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