. The Street railway journal . of line. The fan bear-ing is water-cooled and ring-oiled. From the fact that all FIG. 1.—SHOWING TYPE OF FAN CONSTRUCTIONADAPTED TO KEEP ALL THE BEARINGS IN LINE case. This simplifies the construction by doing away with theadditional bracing usually found on fan housings. The wheel (Fig. 3) is varied somewhat from the ordinaryconstruction. In place of the usual three spiders is substitutedone heavier one, built of I-beams cast into the hub. The bladesare braced upon each other as shown in cut. A wheel con-structed in this manner has been shown to be fully as stro
. The Street railway journal . of line. The fan bear-ing is water-cooled and ring-oiled. From the fact that all FIG. 1.—SHOWING TYPE OF FAN CONSTRUCTIONADAPTED TO KEEP ALL THE BEARINGS IN LINE case. This simplifies the construction by doing away with theadditional bracing usually found on fan housings. The wheel (Fig. 3) is varied somewhat from the ordinaryconstruction. In place of the usual three spiders is substitutedone heavier one, built of I-beams cast into the hub. The bladesare braced upon each other as shown in cut. A wheel con-structed in this manner has been shown to be fully as strongand rigid as the ordinary three-spider form. By the use of asingle spider the necessity for more than one hub on the shaftis obviated. In this manner the load of the wheel is concen-trated upon a comparatively short length of shaft. Moreover,with the deep cone in the casing, as shown in Fig. 1, and thefan bearing sitting far in, as it does, the load of the fan isplaced very near to the fan housing. In fact, the bearing is. FIG. 2.—ILLUSTRATING THE CASTING OFTHE JOURNAL BOXES IN THE ENGINEFRAME FIG. 3.—NEW TYPE WHEEL COVERING. THE USE OF SINGLE I-BEAM, SPIDER CAST INTO THE HUB included within the width of the fan blades. This point is ofgreat importance, since, were the fan of the ordinary three-spindle design, the center of gravity would be some distance December 2, 1905.] STREET RAILWAY JOURNAL. 999 out from the bearing and there would be the tendency of theshaft to move on the fan bearing as a fulcrum and cause anupward thrust in the engine and on the engine journal the single spider this trouble is not encountered. The engine is of the enclosed type, oiled by a recently de-vised pump which distributes copious streams of oil all overall of the reciprocating and revolving parts, even lubricatingthe eccentric outside of the frame. Tests in actual practicehave proven that it will run several months without oiling oradjustment. -♦♦♦- CENTRIFUGAL PUMPS For
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
