. American engineer and railroad journal . inutes to make any necessaryrenewals or repairs. To provide for wear of the spring bar-rels in the housings strips of steel are inserted against whichthe flat portions of the barrels bear. This was done to removeall wear from the housings and render that part of the gear apermanent portion of the car structure, which will never needto be removed except in case of damage in a wreck. In buy-ing this device the railroads will furnish only the springs,which are kept in stock in every railroad storehouse. This arrangement does not require draft timbers, be
. American engineer and railroad journal . inutes to make any necessaryrenewals or repairs. To provide for wear of the spring bar-rels in the housings strips of steel are inserted against whichthe flat portions of the barrels bear. This was done to removeall wear from the housings and render that part of the gear apermanent portion of the car structure, which will never needto be removed except in case of damage in a wreck. In buy-ing this device the railroads will furnish only the springs,which are kept in stock in every railroad storehouse. This arrangement does not require draft timbers, because thehousing casting is bolted to the center sills and to a fillingblock fitted between those sills, and extending about 4 of the transom. Additional security is provided by athrust block between the inside of the housing and the bolsterand by deep lugs on the housing casting which are let intothe center sills and filling block. To show the effect of thestresses produced by a drop test with reference to the recoil -1— if—J. WedgeBlock Chafing Iron Spring Barre The Sessions Standard Friction Draft Gear. the inverted plan showing the device in half section makesthe application plain. By either buffing or pulling the yokemoves the wedge blocks and the inclined surfaces compressthe springs within the spring barrels. The springs return thewedge blocks to their normal positions, and this without shockor recoil to the coupler, because any tendency for the couplerto pass its normal position is resisted by the spring acting onthe inclined surfaces. It is obvious that a broken spring does not prevent theaction of the device, though it reduces its capacity to thatof the remaining spring. In case the castings break, the 1%-in. tie rod remains as a safeguard against pulling the couplerout and an idea of the care of the designer to meet the con-ditions of present practice is given in connection with thespring cap, which will accommodate either a 7 or an , according
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
