. The street railway review . nts 18 in. from the center line. Thus, when the box ispushed sidewise, this inclination allows it to tilt, the movement of the shaft. In the center position the rock arms are held in contactwith the crosshead pins belonging to the cylinders on both sides ofthe car. thus locking the box in its level position. By moving thelever to the right, the left-hand rock arms are disengaged and thoseon the right are placed in full contact with the crossheads of theright-hand cylinder, and the box is prepared to dump on the This is accomplished by admitting air to t
. The street railway review . nts 18 in. from the center line. Thus, when the box ispushed sidewise, this inclination allows it to tilt, the movement of the shaft. In the center position the rock arms are held in contactwith the crosshead pins belonging to the cylinders on both sides ofthe car. thus locking the box in its level position. By moving thelever to the right, the left-hand rock arms are disengaged and thoseon the right are placed in full contact with the crossheads of theright-hand cylinder, and the box is prepared to dump on the This is accomplished by admitting air to the right-handcylinders. The cylinders, which are hinged to the underframe lower 178 STREET RAILWAY REVIEW. [Vol. XV, No. 3. ends and arc free to swing, are equipped witli coiled springs insideto take up the shock when the box is dumped. Guide slots in platessecured to the box underframe direct the movement of the cross-heads, while the crossheads of the idle cylinder.^, when disengaged The Davis Turbine Relief Realizing the desirability of a valve designed to automaticallychange from vacuum conditions to pressure, or from pressure con-
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
