154 



HANDBOOK OF MECHANICAL DESIGN 



F/ang^ 



^Shatt 



Flange 



Shafi-' 

 ^F/ange 



'Spring 

 refaining 

 ring 



Section Through 

 Cen+er 



Keeper pin ' 



Fig. 265. — Another Foote Gear Works 

 coupling. Flexibility is obtained by- 

 solid conically shaped pins of metal or 

 fiber. This coupling provides positive 

 drive of sturdy construction vfith flexi- 

 bility in all directions. 



Fig. 266. — In this Smith & Serrell coupling, flexibility is 

 obtained by laminated pins built up of tempered spring steel 

 leaves. Spring leaves secured to holder by keeper pin. 

 Phosphor bronze bearing strips are welded to outer spring 

 leaves and bear in rectangular holes of hardened-steel bush- 

 ings fastened in flange. Pins are free to slide endwise in one 

 flange but are locked in the other flange by a spring retaining 

 ring. 



Rubber^ leather or fil:ierdisk 



Buffer- ~ 

 slot 



Fig. 267. — In this Brown Engineering Companj' 

 coupling, flexibility is increased by addition of buffer 

 slots in the laminated leather. These slots also aid 

 in the absorption of shock loads and torsional vibra- 

 tion. Under parallel misalignment or shock loads, 

 buffer slots will close over their entire width, but under 

 angular misalignment, buffer slots will close only on 

 one side. 



Fig. 268. — Flexibility is provided by resilience of a 

 rubber, leather, or fiber disk in the W. A. Jones 

 Foundry & Machine Company coupling. Degree of 

 flexibility is limited to clearance between pins and 

 holes in the disk plus the resilience of the disk. This 

 type has good shock-absorbing properties, allows for 

 end play, and needs no lubrication. 



