. The Street railway journal . rts the walls and roof. Windowsare provided at each end, giving an outlook on both sidesand in front of the locomotive; and the driver is so close tothe front that he can see the track a very few feet advantage is not possessed by any type of steam loco-motive now in service. The master controllers, auto-trans-formers, instruments, grid resistances, air operating valves,compressors, and other auxiliary apparatus are mounted in-side the cab upon an angle-iron framework, which is built intothe cab and securely afnchored to floor and roof. A clear pas-sag
. The Street railway journal . rts the walls and roof. Windowsare provided at each end, giving an outlook on both sidesand in front of the locomotive; and the driver is so close tothe front that he can see the track a very few feet advantage is not possessed by any type of steam loco-motive now in service. The master controllers, auto-trans-formers, instruments, grid resistances, air operating valves,compressors, and other auxiliary apparatus are mounted in-side the cab upon an angle-iron framework, which is built intothe cab and securely afnchored to floor and roof. A clear pas-sage-way is left through the center. Trap doors in the floorfurnish easy access to the motors for inspection or repair. MOUNTING OF MOTORMechanically considered, the motors are of the gcarlesstvpe, and interest in the equipment is naturally centered inthe methods employed for suspending the motors and fortransmitting the torque to the drivers. Special precautionsare taken to insure that lioth the Tavitational force of the. FIG. OF DRIVING WHEEL, SHOWING IUCKETS motor on the axle and the torsional force of the armature onthe drivers should be transmitted through elastic mediums,on account of the effect which the great weight of the motorequipment would produce at high speeds. The problem ofsuspension, as exemplified in these motors, was much moredifficult than that encountered in gearless motors intendedsolely for direct-current work, by reason of the fact that oneof the prime essentials in the construction of single-phaseseries motors is that the air gap must remain constant, whilewith certain direct-connected motors of the bipolar type ithas been found possible to allow the mechanical position ofthe armature in the field structure to vary between widelimits. The hollow shaft of the armature is constructed in twohalves, one of which is shown in Fig. i. These two halvesare alike and each is provided with an end disk from whichproject seven hollow pins. Each half is forced
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
