Report of Judges on Pujtfs, &c. 85 



"Its water cylinder being lined with composition, as well as its 

 valves and valve-chest being of the same material as also its metallic 

 or ring packing renders it at once a serviceable pump for salt as well 

 as fresh water, for either hot or cold water, beer or oil, or for acids 

 and liquors, the chemical ingredients of which will admit of no other 

 practicable composition." 



Geo. F, Blake claims snperiority for his pump in the following 

 respects : 



" 1st. Simplicity in the arrangement of parts, the piston valve, 

 tappet arm, piston water, plnnger, and water valves, being all the 

 moveable parts, can be removed withont in the least interfering with 

 each other." [Allowed.] 



" 2d. Hollow plunger valve ha^^ng double the capacity for exhaust 

 steam as for inlet, keeping both exhaust ports open all the time." 

 [This point is well taken, but such a valve is, in our opinion, liable 

 to leakage.] 



" 3d. Cut-oif port, by which the slide valve cuts oif the steam each 

 stroke, preventing waste of steam and pounding under high speed." 

 [The point as to waste of steam is allowed over Hardick. xVll other 

 pumps have adequate means for preventing pounding.] 



" -ith. Auxiliary exhaust port, which connects the main steam 

 port, and takes the pressure from the cylinder through the slide valve 

 into exhaust port, which motion is prior to the movement of the 

 plunger valve, again prevents pounding under high speed." [Allowed 

 as to last part.] 



" 5th. Cushioning plunger valve, by closing its own exhaust, hold- 

 ing the confined steam as a eusliion, then taking steam under spring 

 valve, simple and effective under any pressure." [Allowed.] 

 * " 6th, Positive motion of plunger valve, holding it at either end 

 of stroke by direct steam, making it impossible to center the pump 

 by reason of the valve working back, as in the case of pumps using 

 exhaust steam for this purpose." [Allowed.] 



" 7th. Reducing speed in slide valve, which arrangement also 

 admits of a short connection between the steam and water cylinder, 

 as without regard to stroke no greater- is required than will give 

 access to the stuffing boxes." [Allowed.] 



" 8th- Casting the steam cylinder ■ and plunger cylinder in one 

 piece, i^o one thing has caused so much difficulty as the leakage of 

 steam between the ports. This arrangement is a perfect remedy, and, 

 we claim, is the most valuable improvement in any patent yet issued 



