Patent GB-651859-A (GB)
Title: Improvements in or relating to rotary tipplers for railway waggons
IPC: B65G67/00
Filed: 1947-12-16
Abstract: 651,859. Clamping wagons in rotary tipplers; shoots and hoppers. GENERAL ELECTRIC CO., Ltd., and ROBSON, R. Dec. 16, 1947, No. 33139. [Classes 78 (i) and 78 (iv)] A rotary tippler is provided with means for clamping a wagon comprising at least one sustaining beam arranged to be clamped across the wagon by means of at least one pivoted lever arm to which are connected two ropes or the like, one on each side of the pivot of the lever arm. One of the ropes or the like is arranged to transmit a clamping force and the other a force for raising the sustaining beam from its clamping position, and the necessary forces are automatically applied to one or other of the ropes or the like in response to rotation of the tippler. In Fig. 1 the clamping bar 3 provided with a rocking face 4 is secured to the midpoints of the arms 6a of a pair of levers 6 pivoted at 7 to the tippler rings 2, the arms 6a being approximately six times as long as the arms 6b on the opposite side of the pivot 7. A wire rope 8 secured to each arm 6b passes over pulleys 13, 15 on the tippler cage 1 and on the arm 6b respectively, there being three falls of ropebetween the arm 6b and the tippler cage, and thence over a pulley 69 on the tippler ring 2 to a weighted beam 9. The beam 9, which is preferably of box form and filled with concrete, extends the length of the cage 1 and is supported by flanged wheels 10 to run in arcuate tracks attached either to the tippler rings 2 or to the cage 1. Further wire ropes 18 are secured to the cage and pass over pulleys 16 mounted in brackets 17 at each end of the beam 9, around pulleys 19 carried by the tippler rings 2 and each is connected to the end of one of the levers 6 through a compression spring 22 which allows for any small difference in the lengths of the ropes at opposite ends of the tippler. The beam 9 carries a projection 12 normally engaging a fixed stop 11 so that the lever 6 is raised as shown. When the tippler is rotated in the direction of the arrow 24 the lever 6 and beam 3 are lowered to engage a wagon in the cage 1, the beam 9 moving to its lowest position and resting there. After the beam 3 has engaged the wagon to clamp it against tracks 5 the beam 9 rises on the opposite side of its lowest position, preferably reaching the horizontal centre line of the tippler rings 2 when the desired tipping angle is reached. When the tippler is returned to normal by rotation in the opposite sense engagement of the projection 12 on the beam 9 ensures that the lever 6 and beam 3 are raised. In the construction of Fig. 3, the shorter arms 33b of levers 33 pivoted at 34 to the tippler rings 31 are connected by wire ropes 42, having six falls between pulleys 45 on the tippler cage 30 and pulleys 44 on the arms 33b, and passing round pulleys 43 on the tippler rings 31 and round pulleys 47 at each end of a weight 41, to a weight 60. The weight 41 extends the length of the tippler and is guided in a housing 46 by wheels 57 running in guides 58 on one side and by the tippler rings 31 and short guides 59 on the other side. A wire rope 49 secured by a compression spring 50 to the long arm 33a of each lever 33 passes around pulleys 51 on the corresponding tippler ring 31 and under a pulley 52 at the end of the weight 41 to be secured at 53 to the housing 46. The weight 60 hangs beneath the base-plate 61 of the housing 46 and is normally pulled up against the underside of the base-plate. As the tippler is rotated in the direction of the arrow 54 the ropes 42 permit the levers 33 to move towards a wagon in the cage 30 until clamping beams 35, 38 controlled by the levers 33 engage the wagon. The arms 33a of the levers 33 are about six times as long as the arms 33b, so that during this motion the rope 49 remains reasonably taut. After the beams 35, 38 have engaged the wagon, continued rotation of the tippler causes the ropes 49 to raise the weight 41 to cause the beams 35, 38 to clamp the wagon, the weight 60 falling. As rotation continues the weight 41 picks up sections of a further weight 56 either by means of bridles on the latter extending at various heights over the top weight 41 or by means of normally slack chains between the sections of the weight 56 and the weight 41. The top of the guides 58 is turned over to provide an emergency stop for the weight 41. When the tippler is returned to the normal position by rotation in the reverse sense the weight 60 engages the underside of the baseplate 61 to ensure that the levers 33 are raised. To distribute the clamping force over the wagon the beam 38 engaging the side of the wagon remote from the pouring edge is secured to a lever 39 centrally pivoted to the levers 33 while the beams 35 engaging the wagon ends are pivoted to a lever 36 centrally pivoted to the lever 39. The facing 62 of the beam 38 is provided by hemp rope closely coiled round two pipes 63, clamped by a flat member 64 and covered in a rubber belt. A baffle-plate 65 hinged at 66 to the cage 30 and pivoted to the lever 33 by an arm 67 directs the material from the wagon into a shoot 68.