Patent GB-190929100-A (GB)
Title: Improvements in the Method of and Means for Tipping or Unloading Railway Waggons.
Inventor: JUBB HARRY
IPC: B61D9/02
Filed: 1909-12-13
Granted: 1910-10-27
Abstract: 29,100. Jubb, H. Dec. 13. Tip - wagons.- Railway or contractors' ballast wagons are tipped separately or simultaneously by screwmechanism operated from the axles of the wagons, the tipping and lowering movements being effected (1) by a forward and backward movement of the train, or (2) by forward movement only, the screw-mechanism being automatically disconnected at the completion of each tipping or lowering movement. (1) Figs. 1 and 7 show one form in which a sprocketwheel 3 on the axle 1 of the wagon is adapted to be clutched to the axle by a clutch box 9 operated through a lever 11 and screwed shaft 13 from the side of the wagon. The sprocketwheel 3 is connected by a chain 4 to a sprocket-wheel 5 mounted on a central shaft 7, to which it can be clutched by a box 8 also operated from the side of the vehicle by a lever 10 and screwed cross-shaft 12. The shaft 7 is geared by bevel-wheels 16, 17 to a vertical screw 18 provided with a nut 19, which is connected to the body by links 21, Fig. 7. With both clutches 8, 9 in operation, a forward movement of the train tips the body, and a backward movement lowers it about pivots 46 at one side. In order to disconnect the mechanism when the tipping or lowering operation is complete, the following devices are adopted. The shaft 12 carries a bevel-wheel 24 gearing with two bevel-wheels 25, 26 mounted on the ends of two shafts 27, 28 which are provided with weighted levers 36, 37 tending to turn the shafts in opposite directions. The wheels 25, 26 can be alternately clutched to their corresponding shafts by clutches 31, 32 connected together through levers 33, 34 and connecting-rod 35 and operated from the side of the vehicle. The lever 37 is coupled by a rod 41, Fig. 7, to a bell-crank lever 42 connected by a chain 43 or by a slotted link to the wagon body, and the lever 36 is connected to a plunger 38 working in a cylinder 39. Before the body is tipped the wheel 26 is clutched to the shaft 28, and as the body tips the chain 43 moves the bell-crank lever 42 and causes a partial revolution of the shaft 28 which, transmitted through the shaft 12, disconnects the clutch 8. When the body is to be lowered the clutch 8 is again connected, and the wheel 25 is clutched to its shaft. As the body is lowered it comes into contact with the plunger 38, which has previously been raised by the weighted lever 36 as the body was tipped, and the clutch 8 is again disconnected through the movement of the snafts 27, 12. The clutches 31, 32 are both held in disengaged position when the vehicle is running normally. A modification is described in which the clutch 8 and the cross-shaft 13 are dispensed with, the cross-shaft 12 operating the clutch 9. The lever 11, which is extended for this purpose, is also provided with an horizontal hinge to allow for variation in the distance between the axle and frame. (2) When the body is tipped and lowered by movements of the train in one direction, the chain 4 drives an intermediate shaft which is geared to the shaft 7 through reversing-gear operated from the side of the vehicle. The reversing-gear consists of two pinions in mesh carried by a frame pivoted on the shaft 7 and capable of being turned by a lever until one or the other pinion gears with a toothed wheel on the intermediate shaft. A spur-wheel on the shaft 7 gears with one pinion so that the shaft 7 is driven through one or two pinions, according as one or the other pinion is in gear with the toothed wheel on the intermediate shaft. The disconnecting- gear used in this arrangement acts upon the clutch 9 as in the modified form describe under (1).