IMPROVED PUMP. 



and wearing in all the parts -, besides endangering the whole Improved 

 apparatus, by breaking the bolts and stays, and straining the P?™P fo, *p 

 joints. * wells, mine- 



Fourthly, As the pumps sink, the delivering pipe at the top shafts, &c, 

 is raised, by putting on short pipes, generally about a yard at 

 a time, which occasions many stoppages and much hindrance in 

 the work. 



Having an engine pit to sink at Codnor Park Colliery, Der- 

 byshire, belonging to the Butterley Iron Company, I endea- 

 voured to obviate the difficulties stated ; and first, for the. pur- 

 pose of preventing the pumps working too much upon air, 

 1 constructed a working barrel, (which in this case was nine 

 inches diameter,) AVith a side pipe three inches diameter, con- 

 nected therewith by an opening at the top and bottom ; also 

 at the upper end of the side pipe I fixed a valve, so as to slide 

 over and snut the communication with the working barrel, the 

 Stem of the valve by which it is regulated, passing through a 

 stuffing box, and by letting a quantity of water return through 

 the side pipe to the bottom of the working barrel, (the men at 

 the bottom regulating the valve, so that the pump takes the 

 water as it comes,) very little rubbish is then taken into the 

 pump, and much wear and tear of buckets prevented. 



Secondly, t also, by this valve and side pipe, preclude the 

 necessity of ever drawing the bucket to displace the air. The 

 clack piece was made as small as possible, and the clack with 

 its gearing very low, in order to have as little space as possible 

 between the bucket and the clack. The clack, as represented 

 in the drawing, possesses the advantages of being easily caught 

 by the clack hook in case of being under water. The ring" 

 prevents it from oversetting, and thereby fastening itself in the 

 pumps and the valves are very easily repaired by unscrewing 

 the cross-bar, which admits of their being taken off and re- 

 placed. 



Thirdly, I avoid the inconvenience of suspending the pumps 

 by ropes, by forming the suction-pipe in two pieces, one 

 inner and outer pipe ; the outer pipe is bored for about six 

 inches in length, and the inner one turned cylihdrically to fit 

 it; they slide into each other the whole length of a regular 

 pipe, viz. nine feet : and they are made tight by collars of 

 leather, surrounded by a cup filled with water and clay. The 

 Vol.XXXIV.-No.156. F pumpe 



65 



