42 



BULLETIN 119, U. S. NATIONAL MUSEUM. 



gas passes directly to the engine cylinder at intervals and the balance 

 is stored in a tank to supply a gas burner whose flame is in the path 

 of the petroleum igniting gas, and ignites it as it passes into the 

 cylinder. 



The engine cycle is as follows : The gas burner is lighted and the 

 flywheel turned. During the forward motion of the engine piston a 

 small amount of petroleum is admitted and atomized by air. After 

 the piston has moved a quarter stroke the air bulb is compressed, 

 causing a blast of carbonized air and gas to be emitted from the gen- 



FIG. 17. BRAYTOX OIL ENGINE. OIL I'XDER PRESSURE, 1874. 



erator. The mixture exits through a nozzle, is immediately ignited 

 by the flame of the gas burner, proceeds into the cylinder, and ignites 

 the petroleum vapor within. The pressure created by the resulting 

 combustion closes all valves and forces the piston forward to the end 

 of its stroke and the impetus of the flywheel brings the piston back 

 ready for the next charge. Cat. No. 251,282 U.S.N.M. 



Model of G. B. Brayton Oil Engine. TJ. S. Patent, No. 151468, June 2, 

 1874. Transferred from United States Patent Office. 



The engine consists of a vertical cylinder, single acting. On the 

 crank shaft are two cams which operate the intake and exhaust 



