GB226713A - Improvements in brake slack adjusters for railway and like vehicles - Google Patents

Abstract

226,713. Mitchell, J., and Cossey, J. C. G. March 21, 1924. Compensating for wear.-In means for taking up automatically slack due to wear of the brake blocks of railway &c. vehicles comprising a slotted internally toothed segment 16 pivoted to a part, 3 of the pull rod, the teeth 20 of which are engaged by a pin 19 on the forked end 17 of a part 18 of the pull rod connected to the brakes, the correct action of the slack-absorbing mechanism is ensured by the provision of means for retarding the return movement of the rod 18 when the brakes are released. As shown in Fig. 1, the retarding means may comprise bearing-blocks 32, 33, carried by a hanger 34, and between which the rod 18 passes, the upper block being subject to the pressure of a cam surface 38 on a weighted lever 35 pivoted at 36. Alternatively, the upper block may be subject to spring pressure. In the form shown in Fig. 7, the forked end 55 of the rod 54 carries a pin 57 on which is pivoted the segment 16, whilst the rod 3 carries the pin 19 and passes over a roller carried by stirrupshaped brackets 61, 62, which are urged together by an adjustable spring to grip the ends 58, 59 of the fork 55. In a third form, Fig. 9, bearing blocks 47, 48 are carried by brackets 49, 50 which are subject to the torque of a weighted lever 64 acting through inclines 66, 67 on the bracket 50. Alternatively the brackets may be subjected' to the pressure of an adjustable spring. The hand or power lever 1, Fig. 1, transmits its movement to the arm 4 on the brake shaft 2 through a cam 6, pivoted at 11 to the lever 1, described in Specification 222,998. Specification 105,629 also is referred to.