. The Street railway journal . eichel, chief engineer for Sie-mens & Halske, are closelysimilar to those of motors fornarrow gage. It is necessaryto make the utmost use of thespace between the wheels, and the bearings are, there-fore, placed within the space enclosed by the motorwindings, as shown in Fig. 3. In order to keep the pres-sure on the two bearings equal, the motor shaft isgeared at each end to the car axle, there being a narrowspur wheel at each end of the motor shaft instead of awider one at one side only. Another reason for thisarrangement is that not only the pressure on the teet
. The Street railway journal . eichel, chief engineer for Sie-mens & Halske, are closelysimilar to those of motors fornarrow gage. It is necessaryto make the utmost use of thespace between the wheels, and the bearings are, there-fore, placed within the space enclosed by the motorwindings, as shown in Fig. 3. In order to keep the pres-sure on the two bearings equal, the motor shaft isgeared at each end to the car axle, there being a narrowspur wheel at each end of the motor shaft instead of awider one at one side only. Another reason for thisarrangement is that not only the pressure on the teeth,but also the velocity of the teeth is exceptionally latter amounts to about 18 m per second, with 147teeth in the larger wheel and 69 teeth in the smaller adopting a system of lubrication, a number ofexperiments were tried with tooth velocities of 25 m per second, andit was found that it was not sufficient to fill the gear box with oilor consistent grease and let the gear run in it. For this reason. November 8, 1902.] STREET RAILWAY JOURNAL. 783 the system of forced lubrication with compressed air, shown inFig. 4, was then adopted. By means of a pump a pressure of aircorresponding to 5 cm of mercury is produced in the oil drives the oil out of the reservoir to a distributing cock,which must be turned to the right or left, depending on whetherthe locomotive is to be run forward or backward. The oil flowsthrough one of two sets of pipes to the nozzles above or below thetoothed wheel, as shown in Fig. 5, and after it has been used it the primary winding of the motor was on the rotor, but this isonly feasible with bar winding, which is* not applicable in this caseowing to the high pressure. It was not necessary to constructthe present motor for a very high turning moment, as, in conse-
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
