CONE TURBINE 483 



ype, which has only been manufactured to a limited extent, is thus more 



e 76 Feet 



Scale of Lengths 



FIG. 226. Cone Turbine, l,2r>0 H.P., Head 26 ft. to 33 ft., 120 Revolutions, 

 with Water Balance Piston. 



;uitable where a constant speed is required under a low head which may 

 luffer considerable percentage variation. 



ART. 134. THE SUCTION TUBE. 



An invention of Jonval (1843) greatly increased the possibility of 

 idapting the pressure turbine to suit local conditions. This consists in 

 engthening the vertical discharge pipe until its lower end always dig- 



