Patent GB-392854-A (GB)
Title: Improvements in draw and buffing gear for railway and like vehicles
IPC: B61G9/12
Filed: 1932-12-24
Abstract: 392,854. Combined buffing and draw gear for railway &c. vehicles. KRUPP AKT.-GES., F., Essen, Germany. Dec. 24, 1932, No. 36590. Convention date, Jan. 25. [Class 103 (v).] In a continuous buffing and draw gear for railway &c. vehicles of the kind in which one or more springs connecting the inner ends of the draw-bars on one vehicle are disposed within the gear itself, while one or more additional springs connect the gear with the underframe so as to transfer the stresses to the latter, the overall length of the gear is diminished by locating the first-mentioned set of springs within the second set. In the arrangement shown in Fig. 1, each of the draw-bars A is formed with a collar a<1> and has rigidly secured to it a plate a<2> normally abutting a flange f<2> on a divided sleeve F, the other elements comprising followers b<1>, b<2> associated with recesses c<1>, c<3> on the underframe members C, followers d<1> linked with the plates a<2> by sliding bolts E, a pair of outer springs B, a strong inner spring D, and a sleeve G for limiting the compression of the latter. When buffing or draught stresses are applied to both draw-bars A, the spring D and both springs B are compressed, while little or no resultant stress is imparted to the underframe ; when a one-sided buffing or draught stress is applied all three springs are again compressed, but a resultant stress is transmitted to the underframe. Other modifications derived from this construction are described, with a reduced number of followers and stops, with the result that under certain conditions of stress only one or two of the springs come into action. In another construction, Fig. 4, the plate N<1> secured to one of the draw-bars is extended to form a sleeve enclosing the strong spring Q, and surrounded by the lighter spring o, followers n4, n<5>, ql and stops n<2>, n<3>, p<1>, p<2> being arranged as shown. When stresses are applied to both draw-bars, both springs Q, O are compressed ; when a single draw-bar is stressed, only the spring O is compressed. In a modified form, Fig. 5 (not shown), the sleeve is framed integral with one of the follower plates associated with the spring Q. In a still further construction, Fig. 6 (not shown), each draw-bar end is associated with an independent spring disposed between two followers, these being surrounded by a sleeve fitted externally with a spring and two additional followers. Another arrangement is shown in Figs. 8 and 9, in which the end of one draw bar 3 slides within the cylindrical end 2 of the other draw-bar 1, and the draw-bar ends are associated with through keys 4, 5 at right angles, and with shorter keys 11, 12 and 14, 15 also at right-angles, the keys engaging short slotted sleeves 7, 10 between which and a rib 18 on a long sleeve 19 are arranged the springs 17. An outer spring 22 and followers 23, 24 surround the sleeve 19. When both drawbars are stressed simultaneously, the two springs 17 are compressed; when a one-sided buffing action occurs the spring 22 and the near spring 17 are compressed; when a one-side draught occurs only the spring 22 is brought into play.