I't I.LEYB 



* " 



mi of CMt-iron pulleys i generally 



I li- i 

 . lliptioal. 



: Id .in./ /x**r /'M//ry. - Fig. 41 shows Ml 



arraiwmrnt of Out and UXNM pullr "lie 6u4 pulley. 



>e abaft C by a funk k. ii boat polley, which 



frJy upon the ahaft. The IOOM pultoj U pvwttal from coming off 

 by a eoUar D, which in ateurvd lo ib abaft bj a tapered ; 

 abown. Tbo nave or boat of Iba IOOM polky if here 0Ucd with a 



no. 



braw h it may be renewed wben it become* too much worn. 



Draw the elevationa abown, completing the left-hand one. Scale 6 

 incbea to a foot. 



the above arrangement of pulley* a time him- may be stopped 

 or set in motion at plearare. \V! band in 



loose ] nmchine u at n-ht. ami w: -<n the fot 



l"ill.-y thf machine u in motion. The driving band u ahifted from 

 the one polley to the other by preaaing on that aide of the band 

 which is alvanring towards the pulley*. 



