Improvements in and relating to Incandescent Gas Burners.
Year: 1898

page_text: Date of Application, 1st Nov., 1898-Accepted, 18th Feb., 1899.
COMPLETE SPECIFICATION.
Improvements in and relating to Incandescent Gas Burners.
I, EMILE BAUWERAERTS, of 20, Rue de la Montagne, Brussels, Belgium, Gas
Engineer, do hereby declare the nature of this invention and in what manner
the same is to be particularly described and ascertained in and by the following
statement:-
The gas burner with an incandescent mantle, which is the subject of this in-
vention, is characterised by the double advantage that it produces intense incan-
descence without a forced draught obtained by increasing the gas pressure.
Hitherto in order to obtain sufficiently intense incandescence with burners of
known construction, it is necessary either for them to be surrounded with a chim-
ney or glass or for the gas to be under greater pressure than usual in order to
produce the desired draught to prevent the gas from burning outside the mantle.
This draught is produced automatically in my new burner by means of a special
arrangement consisting in the application of a chimney below the mantle which
produces an annular draught.
In the accompanying drawing
Figure 1 is a vertical section through the centre of my new burner.
Figure 2 is a horizontal section on the line -b of Figure 1.
The characteristic features of this invention are as follows.
First. A special arrangement of the upper part of the burner-tube B covered
with a perforated cap 13¹.
Second. A special arrangement of the upper ends of the three small tubular
passages K communicating with the lower end of an annular space D¹, situated
between the mixing-tube D and the burner-tube B.
Third. A special arrangement of the chimney with an annular draught pass-
age C3 below the mantle M, the latter being applied at its lower end to the cir-
cumference of an adjustable tube C₁ placed concentrically around the tubular
part C of the draught chimney C and its edge having a a securing screw for
supporting the stem T of the mantle M.
The gas jet issues by the small nozzle L, and drawing with it the surrounding
air with which it mingles, it enters an encasing ring I which completes the
mixing and which is in like manner surmounted by a cylinder D serving as a
mixing tube, and is separated by a free annular space 11 from the second con-
centric tube B which serves as a burner-tube and carries the perforated cap B¹
mentioned above.
The ring H is, at its lower end secured jointedly to the burner-tube B which
is supported by three small pipes K communicating at their upper ends with the
annular space D' and at their lower ends with the interior of an annular space I,
surrounding the extended neck of the nozzle L.
Thus the gas ascending in the ring H and mixing-tube D and drawing up the
air in the latter discharges this mixture against the walls of the tube D so that,
having reached the upper end, it in part returns by the annular space D', passes
into the tubes K and again ascends with the jet in the ring H in order to rise

page_text: again with the greater part of the mixture in the mixing tube D and the burner-
tube B and to pass through the perforated cap 11 to enter the lower part of the
mantle M. The latter is attached as already described to the circumference of an
adjustable tube C₁ concentric with the tubular part C of the draught chimney C.
This draught is produced automatically by the arrangement of an annular
draught chimney C, consisting of the concentric tubes CC¹ and B.
In order to ensure a concentric arrangement for the said tubes projections E E
are stamped in the tube C¹ as shown in the figures.
The relative heights of the tubes D and B, that is of the mixing-tube and
burner-tube may be varied and this variation constitutes a means of regulating
the consumption of gas and consequently the illuminating power of the burner.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:-
1. In an incandescent gas-burner the combination of the burner-tube B with
the perforated cover 13 substantially as described and illustrated in the accom-
panying drawing.
2. The combination with an incandescent gas-burner of the small tubes K,
the upper ends of which communicate with the lower end of the annular
situated between the mixing-tube D and the burner-tube B so as to allow a part
D)¹
space
of the gaseous mixture formed in the tube D to return by the upper end of the
latter, the annular space D', the small tubes K and the annular space I and to
ascend again, with the greater part of the gaseous mixture in the mixing tube 1),
the burner-tube B and finally to pass through the perforated cover B', substan-
tially as described.
3. In an incandescent gas-burner, an annular draught chimney C consisting
of an adjustable tube C to which the mantle M is attached and which is secured
concentrically on the tubular part C of the draught chimney C² substantially as
described.
4th. In an incandescent gas burner the combination of the mixing-tube D
and the burner-tube B both of which are adjustable in height so as to allow the
consumption of gas and the illuminating power to be regulated at will, substan-
tially as described.
Dated this 1st day of November 189s
FELL & JAMES,
Agents for the Applicant.