By V. POPP, of Paris.
This invention relates to lighting by mixing air or other gaseous
supporter of combustion with illuminating or other hydrocarbon gas or
vapor, and burning the mixture (at a suitable pressure) in a burner of
special construction, shown in the accompanying illustrations.
[Illustration]
The burner is constructed as shown in Figs 1 and 2. It consists of a
central tube, i, screwing upon the pipe by which the gaseous mixture is
supplied. Upon this tube is screwed a cup, k, of metal or refractory
material which supports a cap, l, of fire-clay in the shape of a thimble
(or of other form, according to the intended use of the burner). The
flanged base of this cap is perforated with a ring of holes, m, as small
and numerous as possible, and the sides of the cap are pierced with
oblique perforations, n. The top of the tube, i, is provided with four
small projections, upon which rests a copper cone, o, soldered to the
tube at a point below the perforations in the base of the thimble. The
cone is perforated at its lower end with small holes, p, the sum of
whose areas is at least equal to the area of the tube. The thimble,
l, is surrounded by an envelope, q, of platinum wire netting or other
refractory material of the same form. The gaseous mixture arriving by
the pipe, i, escapes at the upper orifices, r, and passes down against
the interior surface of the cone, o, out at the orifices, p, and escapes
through the orifices in the cap, l, at which it is burned. The cap is
thereby raised to a high temperature; and the platinum wire sheath
becoming incandescent radiates the light. The gaseous mixture, by coming
first in contact with the copper cone and then with the refractory cap,
becomes raised to an exceedingly high temperature before it is consumed.
In the modified burner represented in Fig. 3, the metal cone and the
fire-cap are truncated. The tube, i, is provided with a number of small
perforations, r, at its upper end, the sum of whose areas is at least
equal to the area of the tube, and by which the gaseous mixture is
distributed within the chamber, k. Upon the upper closed end of the tube
is fixed a cup or inverted thimble, o, of fire-clay. A refractory cone,
l, surrounds this cup and rests by its base upon the cup. This flanged
base is perforated with small vertical holes, m, and upon it is fixed a
platinum wire cage or envelope, q. An annular space is left between the
cone and cup for the passage of the gaseous mixture, which, on escaping
from the orifices, r, passes over the exterior surface of o, the
interior of which is already heated by the flame which has not passed
through the wire gauze, and has been forced by the pressure of the
mixture into the interior of o. The gaseous mixture before passing
through the annular space thus attains such a temperature that on
escaping from the orifice its combustion is greatly promoted.
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