106 



The Philippine Journal of Science 



Fig. 5. Hopper. The essential parts of the charging hopper consist of the coal holder A, 

 the cover B, and the valve C. The locking device D prevents the opening of the valve C 

 ■when the cover B is open, and vice versa. This arrangement avoids the escape of gases 

 when the producer is being charged. The extension of the hopper or the funnel E 

 prevents filling the gas generator up to the cover plate, which would choke the gas outlet 

 F. By means of this simple device, also, a supply of fuel sufficient for a considerable 

 length of time is maintained in the chamber G in the top of the producer. 



Hopper. — The coal is fed centrally into the producer by means 

 of a charging hopper (fig. 5), which is bolted on the cover plate 

 of the generator. 



