1865.] 13 [Trippel. 



drawn in details in plate VI, Fir/. 4} they have a surface of 11.5 

 square feet each. 



The apparatus to charge the coal in the generators is seen in 

 plate V, Fig. 2, in detail. On a cast-iron plate, fastened to the 

 wall, plate VI, Fit/. 22, moves another, plate V, Fig. 2, which is 

 provided with a rack, and receives a fire-proof tile within four 

 flanges, which covers the square openings of the first plate when the 

 generator is closed, and can be opened by means of a section of wheel 

 and lever acting on the rack. There is further a box on the upper 

 plate, which receives the coal when the generator is closed, and from 

 which they drop into the latter when it is opened. 



The gas which is produced in the generators, is conducted through 

 the gas flues, 1 to 6, plate 1, II, III ; they have 46, respec- 

 tively 58 square inches opening each, and unite in the space, E, be- 

 low the combustion canal, K, from whence they pass the front of the 

 hot-air injector, J, and are consumed in the canal, K. 



Blast Canals. A fan, with a capacity of 1700 cubic feet of blast 

 per minute, delivers the same through the main canal, B, plate I, 

 III, IV, to the generators to produce the gas, and to the hot-blast 

 injector to consume the same. Two eight-inch pipes, D, carry the 

 portion of air for the injector from the main channel in the room 

 below the boilers, where it circulates in a length of about 100 feet, 

 and becomes heated to 612° Fahrenheit in the pipes, F, from whence 

 it enters through the pipes, H, in the injector, N. The latter is 

 represented in plate 7/, in several sections; has a length of 5' 9 J" 

 by 1' 3|" height, and 1' 9f", respectively, 6" width. It is provided 

 with two slide-valves of 50f" square opening each, represented in 

 plate VI, Fig. 12, by means of which the influx of hot air can be 

 regulated. 



The blast for the generators is taken from the main channel 

 through branch-pipes of 6'' diameter, then passes through an aper- 

 ture in the wall under the respective fire grates. The end pieces are 

 provided with circular slide-valves, having an opening of 31 square 

 inches each ; they are represented in plan* 111, section G, H, Fig. 3, 

 and plate VI, Fig. 6. By means of these valves and the corres- 

 ponding gearing and levers, the influx of cold air under the grates is 

 regulated. 



The combustible gas which flows through the flues, C 1 to C 6, 

 unites in the vertically inclined space, E, then passes the injector, 

 provided with 52 holes of 1.19" diameter, through which the hot 

 air escapes and intermingles in so many cones, as holes, with the gas 



