the Water while Shafts or Pits are sinking. 365 



of it calculated for utility, they will thereby highly gratify 

 and oblige 



Their most obedient humble servant, 



W. Brunton, 



Butterlev Tron Works, Derbyshire, Engineer. 



' Oct. 20, 1810. 



To C. Taylor, M.D. Sec. 



Explanation of the Brawinisnf Mr. William Buunton's 

 improved Pump, for Mining, and Sinking Shafts. Plate 

 VHI. fig. 1, 2, 3, 4, 5, 6. 



Fig. 1, is a section of a shaft or pit, with the pump fixed 

 in it ; it is cast in lengths of nine feet each, screwed together 

 by flanches, and supported by beams extending across the 

 pit, (as shown in the plan, fig. 6,) short pieces are laid across 

 these, with half circular holes in them ; these being put 

 round the pump, just beneath a fianch, sustain the pump 

 firmly, but may qnicklv be removed when it is /cquired to 

 lower the pumps in the pit ; and, as they arti not fastened, 

 they do not prevent the pumps being drawn upwards ; A, 

 fig. i, is the door which unscrews, to get at the lower valve 

 or clack of the pump ; this is more clearly explained in the 

 enlarged section, fis. 2, where A has the same designation. 

 B, fig. 2, is the working barrel, with the bucket D, work- 

 ing in it; E is the clack, also shown enlarged in figs. 3 .and 

 4 J F is the suction pipe, and GG, the tnoveable length- 

 ening piece ; this slides over and includes the other, as in 

 fig. 2, when the pump is first fixed; but, as the pit is sunk, 

 it slides down over the pipe F, to reach the bottom, as in 

 fig. 1 ; the outside of ilie inner pipe F, is turned true and 

 smooth, and the inside of the outer pipe G, at the upper 

 end, is bored out to fit it; the junction is made perfect by 

 leathers placed in the bottom of the cup, an, which holds 

 water and wet clav over them, to keep them wet and plia- 

 ble, and consequently air-tight; the lower extremity of 

 the suction pipe G, terminates in a nose, pierced with a 

 number of small holes, that it may not take up the dirt ; 

 this nose is not placed in a line with the pipe, but curved 

 to one side of it, so as to describe a circle when turned 

 round ; by this means the sinkers can always place the nose 

 in the dcepfsi part of the pit, as shown in fig. 1 ; and when 

 they dig or blast a dteperpart, ihey turn the nose about into 

 it, the sliding tul)e lengthening down to reach the bottom 

 of it ; by this means there is never a necessity to set a shot 

 for blasting so near the pump foot, as to put it in any dai^- 

 A a 3 ^er 



