POWER TRANSMISSION ELEMENTS AND MECHANISMS 



Hub, 



159 



Keeper 

 ring 



Packing ^ 



Spring 

 reiaining 



- Projecting 

 ' iooihon 

 hub 



'Projeciing 

 ioo+ti in 

 sleeve 



Fig. 293. Fig. 294. 



Fig. 293. — In another design made by Falls Clutch & 

 Machinery Company, a triangular center floating mem- 

 ber made of steel is placed inside two flanges. As in 

 Fig. 290, three pieces of compression lining are used. 

 Coupling flanges are triangularly recessed. 



Fig. 294. — In this Clark Controller Company design, a 

 splined hub mounted on each shaft is connected by a 

 sleeve having internal projections. Power is tran mitted 

 through strips of pacldng fitted between the projecting 

 teeth in the hubs and sleeve. Packing is retained at 

 each end by keeper ring and snap ring. Compensates 

 for misalignment in all directions without the use of 

 flexing materials. 



Fig. 295. — In one design of Lovejoy Tool Works 

 flexible coupling, individual free-floating load cushions 

 are hung between the flange jaws on removable studs. 

 These replaceable cushions are made of brake-lining 

 material, leather or rubber-duck fabric, depending on the 

 loads sustained and the resUience required. No lubrica- 

 tion is needed. 



-Roller 



chain 



(endless] 



Fig. 296. — The positive drive design of Diamond 

 Chain & Manufacturing Company consists of two 

 sprockets connected by a length of roller chain. 

 Clearance between sprockets and chain side plates 

 allows freedom to compensate for misahgnment in all 

 directions. 



