POWER TRANSMISSION ELEMENTS AND MECHANISMS 



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Fig. 311. — For slow speeds, two 

 cork rings mounted as shown can 

 be used. The set collar is some- 

 times counterbored and two small 

 springs placed in the counterbore 

 with a covering washer that bears 

 against the sealing ring. 



Standard lop end piston rings. Bore] 

 \same as for standard piston bores 

 ^and grooves 0.003"to0.006"wider 

 than rings 



Fig. 312. — The common labyrinth 

 shaft seal. 



Fig. 313. — Left, Chicago Rawhide 

 Company seal. Right, Gits Brothers 

 Manufacturing Company seal. They 

 can be used for sealing in either direc- 

 tion, the spring maintaining pressure 

 between the leather and the shaft. 



Fig. 314. — Cooke-type seal that em- 

 bodies the patented principle of main- 

 taining contact between the stationary 

 and moving surfaces. 



Fig. 315. — Anotlier application of the 

 Cooke seal. Metal bellows permit rela- 

 tive movement. 



Fig. 316. — An effective ball or roller- 

 bearing seal. 



Fig. 317. — Illustrates the principle of the 

 water seal. 



