for emptying Waggom at the Termini of Eaihvays S^c. 51 



the apparatus is advanced at pleasure, and made to project be- 

 yond the wharf so as to discharge the waggon immediately 

 over the hold of a vessel. 



The tilting-frame is formed of two cast-iron cheeks or side?, 

 as shewn in fig. 4, having in each two slots or grooves for at- 

 taching to the swings, and for adjustment of the apparatus. 

 These sides of the frame are connected together by two flat 

 malleable iron stays e e, as representei in fig. 3, with two 

 bolts in each end, and a light round iron stay^^ ^t the curved 

 ends. 



The swings are attached to the frame by means of snubs 

 g g, which are bolted vertically to the lower ends of the swings 

 and horizontally to the sides of the frame, the bolts passing 

 through the grooves or slots already mentioned, in which they 

 are moveable — the upper ends of the swings work upon mal- 

 leable iron journals fastened in the top of the cast-iron 

 brackets. When the apparatus is properly adjusted (which 

 is done by moving the tilting-frame forward or backward 

 upon the swings by means of the adjusting slots), the waggon, 

 on taking its position, should be so placed that its centre of 

 gravity may be slightly in advance of the point of suspension. 



The rails to the tilting-frame are laid with a gentle decli- 

 vity, so that the waggon may be brought iipon it with a slight 

 impetus just sufficient to set the frame in motion — the waggon 

 will then immediately fall into a position ready to discharge, 

 as shewn in fig 2, when by a simple contrivance, which may 

 be effected in various ways, the door of the waggon is opened 

 from behind by a handle and connecting-rod communicating 

 with the door-latch, and the load discharged. 



While loaded, the position of the waggon will of itself remain 

 the same, being in equilibrio ; but immediately after it is dis- 

 charged, and consequently the centre of gravity thrown behind 

 the point of suspension, the tendency of the waggon is then to 

 resume the horizontal position, which, however, it is prevented 

 from doing, by means of the spur />, until completely emptied 

 — the spur is then disengaged, and the waggon resumes its 

 level position ready to be removed. 



The whole operation of discharging a waggon (of whatever 

 weight) is effected with perfect safety and facility in a few 

 seconds, and one very iinpoi'tant desi leratum is siipplied by 



