Improvements in Burners for Gas-lighting by Incandescence.
Year: 1899

page_text: Date of Application, 22nd July, 1899
PROVISIONAL SPECIFICATION.
Improvements in Burners for Gas-lighting by Incandescence.
We, AUGUSTUS HENRY GRAUTOFF, Merchant, of 3, Jeffrey's Square, St. Mary
Axe, and FERDINAND FRITZ, Chemist, of 27, Clifton Street, both in the City of
London, do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in atmospheric burners for use in
conjunction with an incandescence mantle or body for the production of light.
In burners of this kind or class, as heretofore constructed, the whole of the air
mixed with the combustible gas previous to its egress from the burner-head,
is admitted through cones or other convenient openings situated at the base or
lower end only of the tube or stem which serves as the support for the burner-
head.
Now an important feature of our present invention is the provision for
admitting an additional supply of air at or near the upper end of the said
tube or stem to mingle with the mixture of air and combustible gas passing
through the same.
To this end, according to one form of our said invention, we make the burner-
head with a short tube or the like arranged in such a manner that it can slide upon
or within or can be placed upon the supporting tube or stem of the burner.
The said tubes are of such relative diameters, or are so arranged relatively
to each other that space for the passage of external atmospheric air to the
interior or mixing-chamber of the burner, is left between the said tubes, and
this additional supply of air is admitted to the mixture after the latter has
reached or even left the upper end of the burner tube or stem.
Or we mount the tube of the burner-head in axial alignment with the support-
ing tube, leaving a space between their adjacent ends for the admission of air.
Or as a further modification, we make the tube of the burner-head to fit closely
upon or within the supporting tube and provide for the admission of air through
holes or perforations in the tube of the burner-head or in both of the said tubes.
In burners arranged according to this invention, the deflecting or burner disc
is made as small as is practically consistent with the fulfilment of its ordinary
function, in order to diminish as much as possible the resistance to the flow of
gas through the burner-head.
We can advantageously apply the improvements herein described to a burner
such as that described in the Specification of former Letters Patent No. 12772
dated 7th June 1898. They are, however, also applicable to burners of other
suitable construction.
1 1
T 1
1000
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.

page_text: Improvements in Burners for Gas-lighting by Incandescence.
We; AUGUSTUS HENRY GRAUTOFF, Merchant, of 3, Jeffrey's Square, St. Mary
Axe, and FERDINAND FRITZ, Chemist, of 27, Clifton Street, both in the City of
London, 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 improvements in atmospheric burners for use in
conjunction with an incandescence mantle or body for the production of light.
In burners of this kind or class, as heretofore constructed, the whole of the air
to be mixed with the combustible gas is admitted through cones or other con-
venient openings situated at the base or lower end of the tube or stem which
serves as the support for the burner-head.
Now an important feature of our present invention is the provision for
admitting an additional supply of air at or near the upper end of the said tube or
stem to mingle with the mixture of air and combustible gas passing through
the same, and so producing a more complete admixture of air and gas.
To this end, according to one form of our said invention, we make the burner-
head with a short tube or the like arranged in such a manner that it can slide
upon or within or can be placed upon the supporting tube or stem of the burner.
The said tubes are of such relative diameters or are so arranged relatively to
each other that space for the passage of external atmospheric air to the interior
or mixing chamber of the burner, is left between the said tubes, and this addi-
tional supply of air is admitted to the mixture after the latter has reached or
even left the upper end of the burner tube or stem.
Or we mount the tube of the burner-head in axial alignment with the support-
ing tube leaving a space between their adjacent ends for the admission of air.
Or as a further modification, we make the tube of the burner-head to fit closely
upon or within the supporting tube and provide for the admission of air through
holes or perforations in the tube of the burner-head or in both of the said tubes.
Referring to the accompanying drawings,
Figures 1 to 4 are sectional elevations illustrating different modes of carrying
our invention into practice, and
Figure 5 is a plan of a burner head showing the deflecting or burner. disc.
In these figures A denotes the burner tube in which the air and combustible
gas are mixed previous to their entrance into the burner head B. The air to be
mixed with the combustible gas in the tube A is admitted at the lower end or
base of said tube as heretofore or in any convenient or suitable manner. At the
upper end of the tube A we according to our invention admit an additional
supply of air to mingle with the already mixed air and gas before the latter
passes into the burner-head. For this purpose in the arrangement shown in
Figure 1 we provide a tube C which carries the burner-head, and which rests
upon the upper end of the tube A. The tube C has a larger diameter
than the tube A so that an annular space is provided between the two
tubes through which space the additional supply of air enters. Ribs or projec
tions may be provided to keep the outer tube central on the tube A. .
In the modification shown in Figure 2, the tube C, is made to slide up and
down on the tube A the ribs et (in this case secured to the tube C) pressing with
.sufficient tightness on the inner tube to hold the outer tube in any position to
which it may be set. The upper ends of the ribs et project from the tube C and
are bent as shown to receive and grip the burner head B. The construction may
be such that on moving the tube Cup or down, the opening for the supply of
.

page_text: dditional air is made wider or narrower, by which means the supply of air
may be regulated in accordance with the varying conditions of volume and
ressure of the gas admitted. This result may be attained for example by the
se of tapering ribs c.
Where the pressure and volume of the gas is permanent the burner head may
be fixed on the supporting stem for example as shown in Figures 3 and 4.
In the modification shown in Figure 3 the tube C is supported by arms (2 with
its lower end some little distance above the end of the tube A thus providing
the required passage for the entrance of the additional supply of air.
In the further modification shown in Figure 4 the tube C fits closely upon
the tube A and it is provided with holes for the admission of the additional
supply of air.
In burners constructed according to our invention the use of a chimney is
unnecessary and the omission of it will not decrease the candle power of the
burner.
The deflecting or burner disc 1) Figure 5 is made as small as is practicable
consistent with the fulfilment of its proper function, in order to diminish as much
as possible the resistance to the flow of gas through the burner-head.
We can advantageously apply the improvements herein described to a burner
such as that described in the Specification of former Letters Patent No. 12772
dated 7th June 1898. They are, however, also applicable to burners of other
suitable construction.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is ;-
1. An atmospheric burner so constructed that in addition to the means pro-
vided for admitting air as heretofore at the base of the burner tube to mix with
the combustible gas, other means are provided for admitting an additional supply
of air at or near the upper end of the said tube, substantially as,
purpose, specified.
and for the
2. An atmospheric burner constructed substantially as described with reference
to either of the forms or modifications illustrated in the accompanying drawings,
for the purpose specified.
Hated this 92nd
1 1000
D. YOUNG & Co.,
11 and 12, Southampton Buildings, London, W.C.,
Agents for the Applicants.