. The street railway review . to thebearing. The entire device occupies 6/{-inches on theaxle. The mechanism for forcing the disk against the wheelto operate the brake is shown in Figure 3. It consistsof a pair of forks which are made to spread apart like apair of pliers between the brake disk and the spreading apart is accomplished by a doublethreaded screw and the screw is worked by the rodfrom the motormans lever. The forks are made ofcast steel and are not rigidly attached to the truck, but ten Itt noTtn Utt^ WuPLr TnWiOS. FIGURE 3. are so mounted that they can move with the car
. The street railway review . to thebearing. The entire device occupies 6/{-inches on theaxle. The mechanism for forcing the disk against the wheelto operate the brake is shown in Figure 3. It consistsof a pair of forks which are made to spread apart like apair of pliers between the brake disk and the spreading apart is accomplished by a doublethreaded screw and the screw is worked by the rodfrom the motormans lever. The forks are made ofcast steel and are not rigidly attached to the truck, but ten Itt noTtn Utt^ WuPLr TnWiOS. FIGURE 3. are so mounted that they can move with the car axle inwhatever slight motion it may have. The greater partof the leverage the motorman exerts is in the doublethreaded screw and as the screw and forks are practic-ally axle mounted, any motion of the axle with referenceto the car body does not seriously affect the adjustmentof the brakes. This is one of the strong points claimedfor it. The brake is very smooth in action, and this issaid to be due to the fact that there is a slight spring inthe forks, which cushions the roughness that wouldotherwise be felt when it is applied. Oil between thedisk and wheel does not seriously affect the working,and in fact, this disk is kept slightly lubricated on pur-pose to make its action smooth. It will be noticed inFigure 3 that a ratchet adjustment is provided on thedouble threaded screw. This is to compensate for anywear in the parts, for it must be remembered the motion of the motormans lever is limited. This adjustmentcan be made in a f
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Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
