. The street railway review . g up the cylinders and a water circulation around the slides whichis used chiefly for emergencies. United States metallic packing isused throughout. The normal capacity of each engine is 500 h. and 650 h. p. condensing. A general view of the dynamos is shown in Fig. 2 and a moredetailed view in Fig. 3. These are provided with a special windingdesigned to give 550 amperes at 550 volts for traction purposes, and 524 STREET RAILWAY REVIEW. (Vol. IX, No. 8. 680 amperes at 400 volts tor lighting. At the left hand side of thepole piece in Fig. 3 will be
. The street railway review . g up the cylinders and a water circulation around the slides whichis used chiefly for emergencies. United States metallic packing isused throughout. The normal capacity of each engine is 500 h. and 650 h. p. condensing. A general view of the dynamos is shown in Fig. 2 and a moredetailed view in Fig. 3. These are provided with a special windingdesigned to give 550 amperes at 550 volts for traction purposes, and 524 STREET RAILWAY REVIEW. (Vol. IX, No. 8. 680 amperes at 400 volts tor lighting. At the left hand side of thepole piece in Fig. 3 will be seen a two-way switch. This is used tocut out the series winding when the dynamos arc used for lighting,and on the right hand side is an equalizing switch for running inparallel with the compound winding. The armatures are wound onthe Jackson-Sayers patent system, with Lewis and Howitts patentpolar extensions. The efficiency of the machines is said to be suchthat the full load may be switched on or ofl, with either the shunt. , JOINT. or compound e-xcitation, witliout causing sparking, while thebrushes need not be shifted under any change of load. The fieldmagnets are of cast steel and the shunt winding is outside the seriescoils. The armature is 44 in. in diameter and 36 in. long, with atoothed core and wound with copper bars with evolute end con-nections. The armature core is ventilated and the shaft is hollow,being provided with Lewiss oil throwers which lift the oil from areservoir and throw it into catchers whence it flows into the bear-ings. The brushes are staggered, the middle one of Boudreauxwhite metal foil being set a little ahead of the other two which areof copper. The coupling is insulated with ebonite and rubberbushings around the pins and the fields and bearings are magnetic-ally insulated from the bed plate by heavy zinc separators. There are two smaller machines in the engine room shown atthe left of Fig. 2. One of these is a motor generator consisting of
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
