Improvements in Atmospheric Gas Burners.
Year: 1897

page_text: Date of Application, 17th Nov., 1897
Complete Specification Left, 13th Aug., 1898-Accepted, 15th Oct., 1898
PROVISIONAL SPECIFICATION.
Improvements in Atmospheric Gas Burners.
We, THOMAS FLETCHER and FLETCHER, RUSSELL & COMPANY, LIMITED, of
Thynne Street, Warrington, in the County of Lancaster, Manufacturers of Gas
Apparatus, do hereby declare the nature of this invention to be as follows:
:―
It has long been a desideratum in the manufacture of gas heated and gas heating
apparatus to find an atmospheric burner which shall, when in use, be incapable
of lighting back and shall give complete combustion of the gas and at the same
time be incapable of becoming choked by ordinary use.
An atmospheric burner satisfying these requirements may be constructed as
hereinafter indicated.
The burner outlets at which the mixed gas and air is ignited are of equal size
and are formed in a vertical inclined or protected face or surface, and each out-
let, if not protected by the form of the burner from matters falling vertically
upon it is provided with such protection in cases where the outlets are likely to
become obstructed by such matters.
.
Between the outlets and the inlet end of the mixing tube, we arrange a per-
forated diaphragm or partition which may conveniently be constructed of metallic
gauze. The perforations or openings in the said partition should not exceed
about one sixteenth of an inch across.
The size of the holes in the burner is such that the sum of the areas of their
outlets is equal to the sum of the areas of the perforations or passages in the
diaphragm or partition, and each sum should separately equal the cross sectional
area of the mixing tube, allowance being made in each measurement for frictional
resistance.
A burner constructed according to these improvements produces a brisk,
vigorous flame with the maximum power, whereas hitherto, when a perforated
or metallic gauze diaphragm or partition has been employed in the body of the
burner, the flame has generally been dull and sluggish and there has been a
loss of efficiency and a liability to burn on the surface of the gauze when the
flame has been turned low.
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We, THOMAS FLETCHER and FLETCHER, RUSSELL & COMPANY, LIMITED, of
Thynne Street, Warrington, in the County of Lancaster, Manufacturers, da
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:―
It has long been a desideratum in the manufacture of gas heated and gas heating

page_text: apparatus to find an atmospheric burner which shall when in use, be incapable
of lighting back and shall give complete combustion of the gas and at the same
time be incapable of becoming choked in use.
An atmospheric gas burner satisfying these requirements may be constructed as
hereinafter described with reference to the accompanying drawings.
The burner outlets at which the mixed gas and air is ignited are of equal size
and formed in a vertical inclined or protected face or surface, and each out-
let if not protected by the form of the burner from matters falling vertically
upon it is provided with such protection in cases where the outlets are likely to
become obstructed by such matters.
Between the outlets and the pipe leading the mixture to the burner (i.e. the
mixing tube) we arrange a perforated diaphragm or partition which may con-
veniently be constructed of metallic gauze.
The perforations or openings in the partition should not exceed about one
sixteenth of an inch across.
The size of the holes in the burner is such that the sum of the areas of the
outlets is equal to the sum of the areas of the perforations or passages in the
diaphragm or partition, and each sum should separately equal the cross sectional
area of the mixing tube.
A burner constructed according to these improvements produces a brisk
vigorous flame with the maximum power, whereas hitherto when a perforated
or metallic gauze diaphragm or partition has been employed in the body of the
burner the flame has been generally dull and sluggish, and there has been a
loss of efficiency and a liability to burn on the surface of the gauze, when the
flame is turned low.
In each of the figures of the accompanying drawings which represent different
forms of the improved burner, O indicates the burner outlets, D the perforated
or metallic gauze partition, and M the mixing tube of the burner. In Figures 1, 2
and 4, there is a flange F above the outlets which protects them from drip and
other matters. In the form of a burner shewn in Figure 3 the projecting upper
part substitutes the flange F.
In a case such as that illustrated in Figure 3 where the diaphragm or partition D
has to be fixed in a position where the openings through it, if flat, could not
possibly have a total area equal to the area of the mixing tube M on the one hand
and to the total areas of the outlets on the other hand, it is more or less dome
shaped or arranged in a sloping position so as to obtain the necessary area.
Figure 4 the diaphragm or partition D being much larger than the mixing tube
may be advantageously constructed of perforated sheet metal having holes to
the required number and size formed in it.
In
It will of course be understood that the protective flanges F are not necessary
if the outlets are protected by other means by their position in the burner, or if
there is no risk of the outlets becoming obstructed or fouled.
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:
Atmospheric gas burners constructed substantially as herein before described
and each having a perforated or metallic gauze partition between the outlets and
the mixing tube the sum of the areas of the openings through which partition
equals the sum of the areas of the burner outlets and each of these equal total
areas being equal to the cross sectional area of the burner mixing tube.
L
1011
AT 1000
W. E. HEYS & SON,
Agents for the Applicants.