8.
Fig. 9 shows a reflecting and regenerative burner with double glass.
The crown, made of metal polished on both sides, has a circular
groove, G, for receiving the end of the central chimney, C, and
presenting an annular aperture by which the products of combustion
enter. The second glass, C?, is fastened to the collar of the
burner carrier, and does not come into contact with the metal crown;
so as to allow the air to enter from outside for supplying the burner.
The gas enters by the pipe, T, provided with a cock. This pipe is
continued to the top of the apparatus, and there spreads out into the
form of a dome; thus dividing into two compartments the trunconic
chamber, S? S squared, whence the hot gas returns to the body of the burner,
B.
[Illustration: FIG 9. REFLECTING AND REGENERATING BURNER.]
On the burner being lighted from below, the products of combustion
rise in the inner chimney, and enter the heater, which they traverse
through its entire extent, while impinging against the outside of the
gas reservoir, to which they give up a large portion of their heat.
They then pass by the passage, D, into the atmosphere or into a
chimney. The air necessary for combustion enters at the top of the
outer globe, and becomes highly heated in its passage through the
space comprised between the two glasses of the burner.
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