CATALOG OF THE MECHANICAL COLLECTIONS 151 



inject the oil into the cylinder in the form of a spray. It was pro- 

 vided with electric ignition. 



In construction the engine resembles a steam engine, including a 

 horizontal single-acting cylinder in which is a reciprocating piston, 

 a crank deriving its motion from the piston, a flywheel on the main 

 shaft, and valve gear for operating a main valve connected with the 

 engine cylinder. It was actuated by the combustion of a mixture of 

 sprayed petroleum and air during a portion of the stroke. The 

 petroleum was sprayed by means of a jet of air from a rubber bulb, 

 acted upon by a sliding plunger, in combination wnth a tube and 

 nozzle rising from the oil reservoir in the base of the engine, 

 somewhat in the manner of a common household atomizer. The 

 quantity of petroleum supplied to the cylinder was regulated by a 

 bypass cock in the air line from the rubber bulb. 



HOCK PETROLEUM ENGINE, 1874 



U.S.N.M. no. 251282 ; original patent model ; transferred from the United States 

 Patent Office ; not illustrated. 



This model accompanied the application for Patent no. 151129, 

 issued to Julius Hock, of Vienna, Austria, May 19, 1874. 



This engine, which resembles the slightly earlier Errani and An- 

 ders engine in many details, attained nearly the same degree of pop- 

 ularity abroad as did the Brayton oil engine in this country and 

 England. It differs from the Errani and Anders engine in having 

 the oil reservoir separate from the engine, in having flame ignition, 

 and in the method of controlling the supply of oil from the reser- 

 voir. It was not so successful as the Brayton because it used a lighter 

 and more dangerous fuel. 



Like the Errani and Anders, it resembled a single-acting horizon- 

 tal steam engine. The oil tank stood back of the cylinder and was 

 equipped with a plunger by which the height of the column of oil 

 supplying the spraying device could be varied to change the quantity 

 of oil being supplied. The oil was atomized by air from a rubber 

 bulb compressed by a plunger on the crankshaft. The engine oper- 

 ated on the 2-stroke noncompression cycle similar to the Lenoir, 

 Brayton, Errani and Anders, and others. 



BRAYTON OIL ENGINE, 1874 



Plate 31, Ficuee 2 



U.S.N.M. no. 251281; original patent model; transferred from tbe United States 

 Patent Office; photograph no. 30417. 



This model was submitted with the application for Patent no. 

 151468, issued to G. B. Brayton, of Boston, Mass., June 2, 1874. 



When Brayton experienced difficulty with the flame of the cylinder 

 striking back into the explosive mixture in the receiver of his gas 



