. Railway mechanical engineer . the gear rotates, onebrake shoe will act as an abutment against which the gear for forcing the other shoe against the wheel. Provision is made for allowing for differences in wear of thebrakeshoes or the loss of a shoe. The gear shaft on its insideend is supported in a curved bearing as shown in Fig. 1, whichpermits the shaft moving out of alinement. The outside bearingof the gear fits in a slotted hole. The change made in the gearand racks to accommodate this movement is shown in Fig. will be seen that both the gear and the racks have their teet
. Railway mechanical engineer . the gear rotates, onebrake shoe will act as an abutment against which the gear for forcing the other shoe against the wheel. Provision is made for allowing for differences in wear of thebrakeshoes or the loss of a shoe. The gear shaft on its insideend is supported in a curved bearing as shown in Fig. 1, whichpermits the shaft moving out of alinement. The outside bearingof the gear fits in a slotted hole. The change made in the gearand racks to accommodate this movement is shown in Fig. will be seen that both the gear and the racks have their teethtapered each side of the center line, thus providing a free work-ing arrangement for all positions of the gear shaft. A H-in- 483 coil spring is used, as indicated in Fig. 2, for bringing themechanism back to normal position, which provides a J4-inclearance between the shoe and the wheel. The brake rods areprovided with turnbuckles for the purpose of giving close ad-justment, thereby overcoming lost motion and maintaining the. Fig. 3—Gear Shaft and Rack for the Berdan Brake Rigging proper piston travel. This gear has been in experimental serviceand is found to work satisfactorily. KINGAN-RIPKEN VALVE GEAR DEVICE The photograph shows a new feature that is applied to outsidevalve gears for the purpose of overcoming the slow actionwhich the combination lever imparts to the Walschaert andsimilar valve gears. The bottom connection to the combinationlever is made to the main rod, as indicated in the illustration,instead of to the crosshead, as is customary. This gives thecombination lever a different movement, in that it responds to theup and down movement of the main rod. As the piston is onthe last half of the stroke this causes the release, compression ^■■^K^^H k? * ^^^^^B^^^^^^^^^^H ■■■llinl BHH^V^^^wvi^^^^H % & e t ^ ^^^Kni^^^kto f^^H |B^9BBfl^\^K 3i--—^ ih iA^Hi ^^^2lM ^^^0^^^^^A«>»^*^^^H Application of the Kingan-Ripken Valve Gear Device and pre-admiss
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
