MACHINE FOR RAISING ORE FROM MINES. 313 



XV. 



Defcription of a Machine for raifing Ore from Mines. By Mr. 

 T. Arkwright*, of Kendal, Weftmoreland. 



A, 



., Plate XV. is an endlefs chain formed of thin plates of Conftru£3on ©f 

 iron, through the ends of which plates iron bolts are patTed, J^ fi * c on ^ m 

 which keep the fides of the chain at a certain diftance afunder, mines, 

 and on which the buckets to contain the ore are fufpended. 

 BCDE, the buckets fufpended on the iron bolts, G H I, 

 three cylinders, round which the chain and buckets revolve. 

 The two cylinders G H are placed above the fhaft ; the cy- 

 linder I within the mine. Their rims are fo much higher 

 than the body of the cylinders, as to admit the buckets to lie 

 within the rims. 



As the endlefs chain and buckets are moved forwards by a 

 power applied to the axis of the cylinder G, the bolts of the 

 chain fall into notches made at regular diftances in the rims of 

 that cylinder, which preferve the chain from flipping. 



As each empty bucket pafles under the axis of the bottom 

 cylinder I, it loads itfelf with ore inftantaneoufly from a large 

 box K, conftantly filling by the workmen below, which box 

 refts on two moveable pins L, at that end furtheft from the 

 wheel, and on an iron catch M at the other. The bucket 

 thus filled afcends to the top of the cylinder G : and, in its 

 paflage betwixt the cylinders G and H, difcharges its contents 

 into a channel or receiver placed betwixt them, from whence 

 they Aide into a cart or receptacle placed underneath the in- 

 clined trough N. The empty bucket pafTes over the cylinder 

 H, defcends on the oppofite fide under the cylinder I, and 

 loads itfelf again at K, as before mentioned ; the buckets re- 

 gularly loading and difcharging themfelves, whilft the cylinder 

 G is kept in motion. 



O is a racket-wheel on the cylinder, to prevent a retrograde 

 motion in the chain. 



* From " Tranfaftions of the Society of Arts" for 1791. p. 277. 

 The Society gave Mr, Arkwright a premium of twenty-five guineas 

 for this invention. 



- ~ - Fig. 2. 



