AMERICAN INSTITUTE. 



189 



Barnham's Force Pump, 



Burnhani's Force Pump. 



W. C. & J. S. Burnham, Eighty-fifth street, New- York. 



Plate A represents the pump as it stands complete for service. 

 Plate B represents the two sections or upper and lower castings 

 divided at the valve joint, with valve leather remaining on the 

 lower casting, and valves open as if in operation. No. 1 valve, 

 open, is admitting water from receiving chamber into the cylinder 

 on the up stroke of piston. No. 2 valve is closed, and the water 

 from the upper end of cylinder passes down through adjacent 

 opening and up through valve No. 3 (represented open) into air 

 chamber, and out at main discharge, opening into outlet pipe. On 

 reverse motion, valve No. 2 supplies the upper end of cylinder 

 through the side water passage, and the water from lower end of 

 cylinder is forced down through opening adjacent to valve No. 

 1, and up through valve No. 4 into air chamber, and out at main 

 discharge as before. The lower or bed-casting, therefore, forms a 

 receiving chamber, two water passages, and the main outlet. In 

 the upper casting, No. 1 represents Ihe cylinder, in which a sim- 

 ple, double-cup plunger operates. No. 2 is the side water passage 

 or continuation of cylinder; and No. 3 is the air-chamber into 

 which valves 3 and 4 both open. 



[Ji silver medal having leen before awarded — diploma. 



Locomotive Feed Water and Surface Heater. 



John R. Sees, 10 Suffolk street, New-York. The cut repre- 

 sents one of Sees' locomotive feed water and surface heaters, at- 

 tached in the breeching, or smoke box of a locomotive boiler. 



