HYDRAULIC CAPSTANS 



779 



at 51 feet per minute and 14 tons at 26 J feet per minute, the working 

 pressure being 700 Ibs. per square inch and the diameter of the capstan 

 head 3 feet. 



FIG. 392 B. 



ART. 208. HYDRAULIC TRANSMISSION GEAR. 



Several devices for transmitting the torque developed at the crank shaft 

 of the engine of a motor car to the driving wheels by hydraulic means 

 have been patented recently. All shock due to changes of gear wheels is 

 thus avoided, while the ratio of speeds of the driving and driven shafts 

 may be regulated with a much greater degree of flexibility than is 

 possible with a mechanical drive. One such device, due to Dr. Hele Shaw, 

 is illustrated in Fig. 394. In this a ring R mounted on ball bearings 

 and fixed as regards rotation, carries the crank pins of four pistons 



