Tlie Phosphates of America. 



119 



(5), varying in shape according to the nature of the work to be done. 

 The pulley (17) revolves upon the tapered and adjustable bearing- 

 stud (20), which is in turn supported by the frame composed of the 

 standards (23). Two of these standards (23a) are extended above 



SECTIONAL VIEW OF THE GRIFFIN MILL. 



the pulley to carry the arms (22) in which is secured the hollow 

 journal pin (12). Within the pulley is the universal joint from 

 which the roll-shaft (1) is suspended. This joint is composed of 

 the ball or sphere (9) with trunnions attached thereto. These 

 trunnions work in half-boxes (11) which slide up and down in re- 



