. Electric railway journal . Light Ordinary Congested Truck- Truck- _ Truck- No. Labor ing Labor ing Labor ing10 $ $ $ $ $ •Trucking includes cost of extra reel truck. The figures not starred do not include cost of superintendence and engineering. 128 ELECTRIC RAILWAY JOURNAL [Vol. XLIX, No. 3 A Natural Ventilating System Ad-justable for Speed Variation A new intake ventilator is the feature of the systemof ventilation being advocated by the Railway UtilityCompany of Chicago. The complete system comprisesa means of natural ventilation whereby the air is takenin thro
. Electric railway journal . Light Ordinary Congested Truck- Truck- _ Truck- No. Labor ing Labor ing Labor ing10 $ $ $ $ $ •Trucking includes cost of extra reel truck. The figures not starred do not include cost of superintendence and engineering. 128 ELECTRIC RAILWAY JOURNAL [Vol. XLIX, No. 3 A Natural Ventilating System Ad-justable for Speed Variation A new intake ventilator is the feature of the systemof ventilation being advocated by the Railway UtilityCompany of Chicago. The complete system comprisesa means of natural ventilation whereby the air is takenin through this new patented automatic intake in thecar roof at the front end and is exhausted through Util-ity exhaust-type ventilators along the sides. The read-ers of this paper are familiar with the design and con-struction of the Utility exhaust-type ventilators, asthey have been described and in use for about fouryears. The intake ventilator is a new development in thenatural ventilation field, its principal feature being a. Yen+ PlateD INTAKE VENTILATOR WITH MOVABLE WING WHICHCOMPENSATES FOR SPEED VARIATION movable wing which is designed to compensate auto-matically for the variations in car speed and thus topermit a uniform flow of fresh air into the front endof the car. One of these devices is located at each endof the monitor deck, or in a corresponding position onan arch-roofed car, the one at the front end acting asan intake and the one at the rear end as an exhaustventilator. Referring to the accompanying drawing, it is seenthat the air enters between a number of baffle plates,A, which are designed to exclude rain or snow. Justbehind the baffle plates is a vertical diffusing plate, B,which tends to equalize the air pressure beyond through this, the air strikes and passes overthe movable wing C, then under the stationary wing Eand through the grille into the car. As the car movesforward the inrush of air causes a pressure on the frontof the movable wing and fo
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