. The Street railway journal . or should be temporarily cut off. Of course,a much larger volume of air is passed through the motor casewhen the air collector is utilized, as it is intended to be. Whenthus admitted to the casing air is forced through the parts ofthe motor, effectually cooling and cleaning it at the same time,and thence out through the top and exhausted as already ex-plained. Ample provision is made for eliminating all dangerto the equipment from any moisture that may enter the aircollector by inserting drips and valves in the piping through July 25, 1903.] STREET RAILWAY JOURNA
. The Street railway journal . or should be temporarily cut off. Of course,a much larger volume of air is passed through the motor casewhen the air collector is utilized, as it is intended to be. Whenthus admitted to the casing air is forced through the parts ofthe motor, effectually cooling and cleaning it at the same time,and thence out through the top and exhausted as already ex-plained. Ample provision is made for eliminating all dangerto the equipment from any moisture that may enter the aircollector by inserting drips and valves in the piping through July 25, 1903.] STREET RAILWAY JOURNAL, 125 which the air must pass before it reaches the motor. The frontof the air collector is covered by a screen, which prevents theadmission of dust or dirt to the motor case. These collectorsalso contain valves which work automatically so that the carmay be run in either direction and the ventilating system oper-ated without any attention on the part of the employee. Modifications of this form of ventilator have been used on. and long runs with cars that are overcrowded, are not unusualconditions, especially on the older systems, and it will be readilyunderstood that service of this character means an almost con-stant overheating of the motors. In some of the newer installa-tions provisions are made for these requirements, but on theolder roads the motors may be said to be undergoing a con-stant baking, which, of course, greatly weakens them, reducestheir efficiency and eventually results in breakdowns. Experiment has shown that cars on which the motors havebeen kept cool and clean may be continued in service for alonger period without overhauling and repairing the motorsthan other equipments doing similar work, and that they mayalso be kept much more regularly in service. The motor has amuch longer life where it is properly ventilated, and besides itis always in much better condition. In the Camden tests a careful examination was made of themotors before the ventilating syst
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
