IMPROVEMENT IN THE CONSTRUCTION OF TERRA-COTTA KILNS.
The object of the arrangement shown in Figs. 191 to 193 is to modify the construction of the doors of kilns for burning terra-cotta in such a way that the heat will be distributed equally through the door and the other parts, so that all of the kiln will have a uniform temperature.
The invention is that of Mr. Afred Hall, of Perth Amboy, N. J., a gentleman who has spent a lifetime in the manufacture of terra-cotta, and it consists in so arranging a door for tcrra cotta kilns, with flues in its inner part, communicating with and forming continuations of the ordinary flues in the kiln-wall, and connected with the furnaces by flues, that a uniform distribution of heat all around the kiln will be effected, and all the articles in the kiln will receive an equal degree of heat, and thereby be burned more satisfactorily than is usual.
Fig. 191 is a front elevation of the improvement, shown as applied to a kiln. Fig. 192 is a sectional plan view of the for ward part of the kiln. Fig. 193 is a sectional elevation of the door.
A represents the furnace doors, B the ash-pits, and C the door of the kiln D. To the side parts of the door frame are attached plates E, which project at the sides of the door, and have eyes formed in their outer ends to receive pins F. The
pins F also pass through holes in the ends of the U bars or devises G, between which ends the eyes of the plates E are placed. The bends of the bars G pass also through eyes in the forked ends of the right and left screws L. The screws L pass through right and left screw-holes in the ends of the bars M, which cross the door C, and have a longitudinal slot formed through them to receive a lever, so that they can be turned to draw the screws L inward and firmly clamp the door C in place. With this construction the door C can be removed by remov ing the pins K, the screws L, and the bars Al.
In the inner part of the door C are formed flues I, which, when the door is closed, communicate with and form continua tions of the ordinary flues y in the inner parts of the kiln walls. With this construction the inner part of the door and the inner wall of the kiln will be heated perfectly, so that there will be no cool part of the kiln, as the products of combustion from the furnaces A are introduced into the flues I of the door C through flues a in the same manner as they are introduced into the flues 7 in the inner wall of the kiln, so that the heat will be distributed evenly all around.