. The street railway review . h this arrangement the equipment would consist ofstandard motors and controllers working on standard volt-age, while the voltage of distrihution would be double thatof standard practice. There would he a plus and minusgenerator to each engine, while the plus and the minusswitchboards and their feeders would be entirely separate,each being a standard switchboard. Any derangement at the power house, or on the line,causing the loss of current on one side, would not affect theoperation of the motors on the other side. The motor con-nection of the inoperative side coul
. The street railway review . h this arrangement the equipment would consist ofstandard motors and controllers working on standard volt-age, while the voltage of distrihution would be double thatof standard practice. There would he a plus and minusgenerator to each engine, while the plus and the minusswitchboards and their feeders would be entirely separate,each being a standard switchboard. Any derangement at the power house, or on the line,causing the loss of current on one side, would not affect theoperation of the motors on the other side. The motor con-nection of the inoperative side could be switched over ontothe operative side, while the trolley pole and lamp circuitcould be left connected to the inoperative side, to indicatethe return of current. In the slow speed sections it wasproposed to pull down one trolley, and breaking the groundconnection switch this trolley connection on to the ground,thus throwing the two sides into series relation on 500 voltsand reducing the speed. It was proposed to divide the. FIG. 2 A—DETAIL FOR DOUBLE TROLLEY. trolley wire in the slow speed sections into plus and minussections, as is done with the usual three wire system. The two trolley wires of opposite sign in the high speedsection were to be two feet apart and to secure proper insu-lation between them it was proposed to suspend them fromsuspension cables attached to the ends of vertical woodenarms, projecting downward from wooden cross arms asshown in Fig. 2 a. Fig. 2 shows the arrangement for the useof a single trolley. These vertical arms being long enoughto prevent the trolley pole from striking the cross arm in theevent of its leaving the wire, and being of treated timber,there would be interposed between the trolley wires of dif-ferent sign the insulation due to several feet of treatedwood. The suspension cable running in the same directionwith the trolley wire and being directly over it with the lrolle\ wire suspended at frequent intervals as shown inFig. 3, a tro
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
