. The street railway review . the importance of educating motormen not to turn oncurrent too fast. At the same time nearly every super-intendent laments the difficulty of getting men to observeat all times the rules about slow starting. It is seldom that the difference between a correct anda too quick start is illustrated as graphically and unmis- recognize the peculiarity of this method of control. Whilethe initial starting current is not very high with this kindof controller there is a sudden rise when the change ismade from series to multiple, and particular care needsto be taken not to thr
. The street railway review . the importance of educating motormen not to turn oncurrent too fast. At the same time nearly every super-intendent laments the difficulty of getting men to observeat all times the rules about slow starting. It is seldom that the difference between a correct anda too quick start is illustrated as graphically and unmis- recognize the peculiarity of this method of control. Whilethe initial starting current is not very high with this kindof controller there is a sudden rise when the change ismade from series to multiple, and particular care needsto be taken not to throw in multiple until the car hasattained its full acceleration with the motors in somewhat startling results shown by the upper curvein the diagram are caused mainly by throwing in multipletoo quick. One of the most interesting and encouraging thingsabout the diagram is the small gain in time which is madeby the wrong start. There has been a constant tendencyof late years toward quick starts in order to make a fast. takably as in the accompanying diagram, which repre-sents the results of a series of tests made on the ChicagoCity Railway by G. W. Knox, electrician. Blue printsof this diagram are posted at all the car barns for thebenefit of motormen. By insisting on the observance ofthe lesson which this diagram teaches, and bj- suspend-ing for a few days those who refuse to learn, the currentoutput per car at the power station has been reduced b}a large percent. This of course also means a saving inrepairs. A series-parallel controller requires a very differenthandling from the old style rheostat and in some casesmotormen and those who educate them do not seem to schedule. A heav}^ starting current has been consideredas something which could not be avoided in this connec-tion. Mr. Ivnoxs investigations show, however, that ifthe controller is handled right there is very little time lostby the correct as compared with the incorrect start,while there is an enormous savi
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
