. The street railway review . MOVEMENT OF TROLLEY ON CURVE. cal operation. The ordinary American form of span orbracket construction could have been installed, but thought that if a satisfactory system could bedevised that would do away with span wires entirely andin many cases necessitate only a single line of poles, it. k^^^^^^^ RELATIVE POSITION OF TROLLEY IN PASSING CARS. would be a step in advance. A glance at the drawingswill give a good idea of the manner in which the problemwas solved. Instead of being over the center of the car,the trolley wire runs on one side, at a dist
. The street railway review . MOVEMENT OF TROLLEY ON CURVE. cal operation. The ordinary American form of span orbracket construction could have been installed, but thought that if a satisfactory system could bedevised that would do away with span wires entirely andin many cases necessitate only a single line of poles, it. k^^^^^^^ RELATIVE POSITION OF TROLLEY IN PASSING CARS. would be a step in advance. A glance at the drawingswill give a good idea of the manner in which the problemwas solved. Instead of being over the center of the car,the trolley wire runs on one side, at a distance that mayvary from one to thirteen feet from the side of the car. 723 This variation is allowed by the fact that the trolley polecan swing around at any angle, being free to turn on themast arm on top of the car. The trolley wheel can alsoturn at different angles with the trolley pole. Il wouldseem that such a form would require a complicated systemof automatic springs, but, as a matter of fact, the onlysprings used are on the short end of the trolley pole,where they serve to keep the trolley firmly against thewire. It is unnecessarj- to state that this makes the o\er-head construction vastly easier. With the common formof trolley a variation of the trolley wire, from the centerline, amounting to only a few inches, is enou
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
