64 Transactions of the American Institute. 



tical cylinder or tube of any desired diameter and length is placed a 

 shaft, upon which are secured, at proper distances apart, sections of 

 propeller blades, upon the interior surface of the cylinder or tube ; 

 above these are oblique stationary segments of opposite pitch, to 

 counteract the rotating motion imparted to the fluid raised by the 

 centrifugal action of the screws in rapid revolution, and change it to 

 an upward current. The thrust upon the vertical shaft, imparted to it 

 by overcoming weight of load or work done, is arrested and received 

 upon a comparatively frictionless water-bearing. This bearing con- 

 sists of a cast iron beam which rests upon the top elbow of the 

 pump, and upon which are secured pillars supporting a stationary 

 disc, provided with an ordinary stuffing box, through which revolves 

 the propeller shaft ; under a dome, which rests on the stationary disc, 

 is another disc, which is secured to the propeller shaft and revolves 

 with it, and which is provided with an annular piston with ring 

 packing. 



Water is forced through an ordinary pipe between the stationary 

 and revolving discs, under a pressure equal to the weight to be sus- 

 tained per square inch, which is confined between them by the annu- 

 lar piston, and separating them by a film of water upon which the 

 revolving disc floats, sustaining the weight of the column of water. 

 Any surplus water forced between the discs, and lifting the revolving 

 disc higher than a given point, the annular piston is thereby raised 

 from off the stationary disc, and allowing the water to pass out under 

 it, which is received into the dome and is returned through an ordi- 

 nary pipe to the tank from which the supply is obtained. The action 

 of the screws secured on the vertical shaft moves the water upward 

 with more or less velocity, imparting to it a given momentum ; the 

 centrifugal action imparted to the fluid being counteracted and 

 arrested by the oblique stationary segments of opposite inclination 

 upon the interior of the cylinder, causing the water to move in its 

 upward direction. The screws being placed at intervals above each 

 other upon the rapidly revolving central shaft or axis, receive and 

 impart to the moving ascending column of water, in regular succes- 

 sion, the requisite impetus or force required to keep it moving, with- 

 out material change in its velocity, continuously to point of discharge. 



This pump, as compared to all devices for the purposes intended, is 

 more simple in its construction ; involving no complication of parts, 

 little liability to derangement, efficient in its action, and capable of 

 performing an amount of work, limited only by strength of material 

 and power requisite, and for these reasons, we consider it well deserv- 



