Improvements in Atmospherio Gas Burners.
Year: 1894

page_text: Date of Application, 5th Oct., 1894-Accepted, 10th Nov, 1894
COMPLETE SPECIFICATION.
Improvements in Atmospherio Gas Burners.
We, THOMAS FLETCHER of Thynue Street Warrington in the County of
Lancaster, Gas Engineer, WILLIAM RUSSELL of the Scotia Foundry, Pendleton,
in the County of Lancaster, Ironfounder, and FLETCHER RUSSELL & Co.
LIMITED of Thynne Street, Warrington, in the County of Lancaster, Gas
Engineers and Iron Founders, do hereby declare the nature of this invention, and
In what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to atmospheric gas burners such as are used in gas fires,
and its objects are to prevent "lighting back," and to avoid the explosions which
sometimes occur in lighting and extinguishing the flame.
For the purpose of this invention, we constinct or arrange below the burner
nozzles a safety chamber separated from the mixing tube or chamber by a
diaphragm or partition in which there are or are formed slits for the passage of
the mixed gas and air into the chamber below the nozzles.
We may construct atmospheric gas burners according to our present invention
in different ways, and as may be required for special applications, but the con-
structions hereinafter descubed with reference to the accompanying drawings are
typical and will enable our invention to be carried out in all cases.
In the drawings:
Figure is a plan with part of the buinei cap removed, in order to shew the
slits below.
Figure 2 is a cross section of Figure 1.
Figure 3 is n vertical longitudinal section taken along the axis of the injection
tubes.
Figures 4 and 5 are views corresponding with Figures 1 and 2, and represent a
modification in constinction.
In each of the figures the gas burner nozzles are shewn at A. B is the safety
chamber below the nozzles, and C the slit diaphragm or partition situated between
the safety chamber B, and the mixing chamber D As already described, the
partition or diaphragmn has shits there for the passage of the mixed gas and an
from the mixing chamber to the safety chamber. As represented by the diawings,
Figues 1 and 2, the slits me saw cuts made in the upper surface of the mixing
tube D, and the nozzle cap E being semi-circular, the safety chamber B is cresceut
shaped in cross section, but this is not essential, being the result only of the most
convenient method of construction. The saw cuts or slits are preferably one
sixteenth of an inch wide or less, and the nozzle cap may be secured above them,
to form the safety chamber, by screws or other convenient means.
The modified form of the burner represented by Figures 4 and 5 differs from
that shewn by the former figures only in having the burner nozzles arranged above
the injection tube. As in the previously described construction, the slits are
formed in the upper surface of the mixing tube D, but the nozzle cap E extends
over both the injection and mixing tubes, and a larger chamber B is thus formed than
in the construction illustrated by Figures 1 to 3. This arrangement may be used
when it is desired to prevent dit falling through the buner nozzles upon the slits
in the pait C.
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In other respects the burners are constructed in the customary manner. In the
buiners represented, F F are co-axial injection tubes opening into the opposite
euds of the mixing tube or chamber D, and having an air inlet G, below the gas
jets H which are supplied through the pipe nozzle I.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In an atmospheric gas burner, the combination of slit outlets from the mixing
chamber and a cap and nozzles constructed and arranged substantially as and for
the purpose herein before described with reference to the accompanying drawings.
Dated this 3rd day of October A.D. 1894,
WILLIAM E. HEYS,
Agent for the Applicants.