. American engineer and railroad journal . astening the coupler yoke to the draw-bar, now in general use. It reduces the wear of the wheel flangesand rail and greatly reduces the number of accidents due to thebreakage of the wheel flanges. It also reduces the side stresseson the car framing and the wear of the coupler and breakage ofcoupler shanks. Loss of time and the expense of getting carsover sharp curves are eliminated. The method of making the connection is very simple and inex-pensive as compared to the time and cost of applying the ordi-ordinary type of yoke. The coupler or coupler yok
. American engineer and railroad journal . astening the coupler yoke to the draw-bar, now in general use. It reduces the wear of the wheel flangesand rail and greatly reduces the number of accidents due to thebreakage of the wheel flanges. It also reduces the side stresseson the car framing and the wear of the coupler and breakage ofcoupler shanks. Loss of time and the expense of getting carsover sharp curves are eliminated. The method of making the connection is very simple and inex-pensive as compared to the time and cost of applying the ordi-ordinary type of yoke. The coupler or coupler yoke may beremoved and replaced on the line by trainmen or section handswithout sending the car to the repair tracks, thus effecting aconsiderable time-saving as well as reducing the expense. The strength of the connection is so much greater than thatof the present standard that tearing apart will be practically elim-inated by its use. The pulling apart of the drawbar and yoke isdue to the pulling stresses or shocks, and to gain some idea of. TATUM-PRENDERGAST YOKE. the relative strength of this form of connection as compared tothe ordinary type under such conditions, tests were made underthe M. C. B. drop testing machine at Mount Clare. The two yokes were i% ins. thick and the one for the radialconnection was 4z/2 in. wide or l/2 in. wider than the standardyoke because of the 2j4-in. hole, for the pin, in the bosses. Thelips on the standard yoke were carefully fitted over the tail of thecoupler. The results of these tests were as follows: TATUM-PRENDERGAST of 3WS. Height. Rebound 1 1 ft. A in. 2 2 1 3 3 1 4 4 1 5 5 3 6 6 3 * 7 7 Cracked at back at both back fillets. This yoke was destroyed without affecting connections at thedrawbar. M. C. B. YOKE. No. of Blows. Height. Rebound. Remarks. 1 1 ft. A in. 2 2 1 3 3 1 One of the lips cracked. 4 4 1 5 5 The other lip broken off and both 1*Ain. rivets sheared.
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
