gg BULLETIN 173, U. S. NATIONAL MUSEUM 



to function as a condenser, a condenser air pump, and feed-water 

 hot well and heater. 



The invention "consists in simplifying the apparatus that con- 

 denses the steam discharged by the first eduction from the cylinder 

 of a condensing steam-engine by closing the hot well of the engine 

 against the atmosphere and by keeping a portion of the space of the 

 hot well free from water, and by delivering the steam discharged 

 from the cylinder by the first eduction into the hot well, so that it 

 may be condensed or partially condensed by the water delivered by 

 the air-pump into the hot well." The hot well is thus made "to 

 act also as an additional condenser and dispense altogether with an 

 additional air pump to draw the water from the additional 

 condenser." 



PITTS AND GLUYAS CONDENSER, 1872 



U.S.N.M. no. 309239; original patent model; transferred from the United States 

 Patent Office; not illustrated. 



This model was submitted with the application for the patent issued 

 to George K. Gluyas and Washington R. Pitts, of San Francisco, 

 Calif., October 1, 1872, no. 131779. 



The model represents a simple arrangement of two rectangular 

 chambers joined by rows of tubes and fitted with baffles so that steam 

 admitted at one end would traverse the tubes in three directions 

 before passing out. The inventor designed the condenser to be 

 located in the wheel box of a paddle-wheel steamer where the water 

 and spray from the wheel would cool the tubes and condense the 

 steam. 



STARBUCK SIPHON CONDENSER, 1878 



U.S.N.M. no. 309354 ; original patent model ; transferred from the United States 

 Patent Office; not illustrated. 



This model was submitted with the application for the patent 

 issued to George H. Starbuck, of Troy, N. Y., September 10, 1878, 

 no. 207827. 



The model represents a form of barometric condenser in which 

 an annular jet of water is brought into contact with an annular jet of 

 the steam to be condensed, and the resulting mixture is conducted 

 from the condenser by a pipe extending 33 feet or more below it. 

 The peculiar feature of this condenser is the bulbous valve, which 

 fits within the water pipe and forms a variable annular water pas- 

 sage by which the quantity of water flowing can be adjusted while 

 the shape of the annular jet of water, which is essential to the best 

 -operation of the condenser, is maintained unbroken. 



