Improvements in and relating to Incandescence Burners and Mantle Supports.
Year: 1899

page_text: Date of Application, 10th Jan., 1899
Complete Specification Left, 10th Nov., 1899-Accepted, 23rd Dec.,
1899
PROVISIONAL SPECIFICATION.
Improvements in and relating to Incandescence Burners and Mantle
Supports.
I, JOIN HENRY HILL DUNCAN, of 39, Coleman Street, in the City of London,
Chartered Accountant, do hereby declare the nature of this invention to be as
follows:-
This invention has reference to improvements in and relating to Bunsen
burners suitable for burning a mixture of air and combustible gas or vapour
in contact with a mantle or other refractory body for producing light by incan-
descence of such mantle or body, such for instance as are described in the Speci-
fication of F. de Mare No. 10497 of 1894, and to further improvements in the
invention which is the subject of my former application No. 27205/98.
The upper end or head of the burner tube through which the mixture of air
and combustible gas or vapour is supplied is provided at the top with a suitably
supported plate having a notched, serrated or like periphery such as is already
in use in burners of this class arranged in contact with or at a short distance
from the wall of the upper end or head of the burner tube so as to form there-
with a series of holes, or a single annular hole having a notched inner periphery,
through which the intimate mixture of air and gas or vapour can flow upward
direct from the burner tube below and be burnt in contact with a mantle above,
and without any internal perforated shell, such as is shown in Fig. 2 of De Mare's
specification, or such as is now used in burners of this class. In this way there
can be obtained, in a simple manner, a flame having a high heating power and
specially suitable for incandescence gas lighting. The edge of the plate is or
may advantageously be slightly bevelled so as to be inclined in an upward and
outward direction.
The upper end or head of a burner tube constructed as described may be mado
of cylindrical, conical or flaring shape and may form a continuation of the lower
portion of the burner tube or an enlarged extension of the upper end of such
tube,
The top plate having the notched, serrated or like periphery is or may he
suitably formed or adapted to carry a mantle holder or support.
In one form of my improved apparatus, the top plate is formed in one with
or supported by a cap or plug or other suitable holder adapted to be readily
applied to the upper end or head of the burner tube, and to the central portion
of such top plate is suitably fixed the lower end of the mantle support to the
upper end of which the upper end of the mantle is permanently fixed, the lower
end of the mantle fitting around the cap or lower holder. The arrangement is
such that the top plate with cap or holder, mantle support, and mantle con-
stitute practically one article that can be readily handled without liability of
breaking the mantle. The central portion of the top plate, which is solid, may
conveniently be dished or recessed and the mantle support be fixed therein by
suitable material such as plaster of Paris, steatite, cement or like material, such
material serving also to retard the escape of heat from this useful centre of
combustion. The top of the mantle may be fixed to the top of the mantle sup

page_text: port by like material. Such a combined top plate, mantle support and mantle
with holder adapted to be readily applied to the upper head of the burner tube
obviates the mantle being separately handled by unskilful persons.
Unted : 1041 1
1000
.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered l'atent Agent.
Improvements in and relating to Incandescence Burners and Mantle
Supports.
1, JOHN HENRY HILL DUNCAN, of 39, Coleman Street, in the City of London,
Chartered Accountant, 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 has reference to improvements in and relating to Bunsen
burners suitable for burning a mixture of air and combustible gas or vapour
in contact with a mantle or other refractory body for producing light by incan-
descence of such mantle or body, and such for instance as are described in the
Specification of 1. de Mare No. 10497 of 1894, and to further improvements in
the invention which is the subject of my former application No. 27205 of 1898,
as I shall now describe with reference to the accompanying illustrative drawings
wherein Figs. 1 and 2 show respectively in vertical section and plan, one con-
struction of incandesconce gas burner according to this invention. Figs. 3
and 4 are similar views to Figs. 1 and 2 respectively showing a modification.
The upper end or head of the burner tube through which the mixture of air
and combustible gas or vapour is supplied, and which comprises a lower conical
portion 1 with air inlet 1", an inverted conical intermediate portion 2, and a head
portion 3, as well understood, is provided at the top with a suitably supported
plate 4 having a notched, serrated or like periphery 4", such as is already in
use in burners of this class, arranged either in contact with the wall of the
upper end or head 3 of the burner tube, as shown in Figs. 1 and 2, so as to
form therewith a series of holes 5 of angular shape as seen in plan, or arranged
at a short distance from such wall, as shown in Figs. 3 and 4, so as to form
therewith a single annular hole 5 having a notched inner periphery, through
which holes or hole the intimate mixture of air and gas or vapour can flow
upward direct from the burner tube below and be burnt in contact with a mantle
above, and without any internal perforated shell, such as is shown in Fig. 2
of De Mare's Specification, or such as is now used in burners of this class. In
this way there can be obtained, in a simple manner, a flame having a high
heating power and specially suitable for incandescence gas lighting. The
irregular edge of the said plate is or may advantageously be slightly bevelled
so as to be inclined in an upward and outward direction.
The upper end or head of a burner tube having a plate 4 of the kind described,
may be made of cylindrical shape, as shown, or of conical or flaring shape, and
may form a continuation of the lower portion 1-2 of the burner tube, as in
the example illustrated, or an enlarged extension of the upper end of such tube.
That part 3 of the upper end or head of the burner tube which directly carries
the fop plate 4 may conveniently be made as a separate short tube adapted to
be slipped on and off the remaining part 3ª, the combined tube 3 and top plate 4
resembling a cap which is supported in place by an external bead 3 on the

page_text: burner tube. The top plate 4 may be made in one piece with the tube 3, as
in the construction shown in Figs. 1 and 2, the holes 5 being formed by punching;
or the plate 4 may be made separate as shown in Figs. 3 and 4 and be held
in place by metal bars or strips 6 that are fixed to the underside of the plate
and the outer ends of which are suitably secured to the 'part 3, as for example
by rivetting.
The top plate 4 may, as usual, be suitably formed or adapted to carry a
mantle holder or support. For this purpose it may be provided with a central
socket 4b..
Figs. 5 and 6 show in vertical section, a form of my improved apparatus in
which the top plate 4 having the notched, serrated or like periphery 4 is sup
ported by a suitable holder such as a cap 7 (Fig. 5), or a plug 7 (Fig. 6) that
is adapted to be readily applied to the part 3 of the upper end or head of the
burner tube, either by fitting over or into the same, and to the central portion
of such top plate 4 is suitably fixed the lower end of the mantle support 8 to
the upper end of which the upper end of the mantle 9 is permanently fixed,
the lower end of the mantle fitting loosely around the cap or lower holder. The
top plate 4 may be formed in one piece with the cap 7, as shown in Fig. 5, or
separate therefrom as shown in Fig. 6. As will be seen the arrangement is such
that the top plate 4 with cap or holder 7 or 7", mantle support 8, and mantle
constitute practically one article that can be readily packed and transmitted by
post or otherwise from one place to another, and can be readily handled with
less liability of breaking the mantle, or of setting it in an inefficient position
on the burner tube, than has heretofore been usual. The central portion of the
top plate 4, which is solid, is provided with a socket 4b, and the mantle support
is fixed therein by suitable material such as plaster of Paris, steatite, cement or
like material, such material serving also to retard the escape of heat from the
centre of the burner along the mantle support. The top of the mantle 9 may
be fixed to the top of the mantle support 8 by like material, as shown at 10.
Such a combined top plate, mantle support and mantle with holder adapted to
be readily applied to the upper head of the burner tube, obviates the mantle
being separately handled by unskilful persons.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed I declare that what
I claim is:-
1. The improved incandescence gas burner constructed substantially as herein-
before described with reference to Figs. 1 and 2; and to Figs. 3 and 4 of the
drawings annexed.
2. In an incandescence burner making the top plate 4 having the notched,
serrated or like periphery in one piece with or attaching it to a cap, plug or
other suitable holder fitting the upper end or head of the burner tube, substan-
tially as described.
3. For incandescence gas burners, a removable attachment consisting of a top
plate having a notched, sorrated or like periphery, a cap or other holder adapted
to be applied to and removed from the upper end or head of a burner tube and
to which the said top plate is secured, a mantle support fixed to the top plate,
and a mantle permanently fixed to the top of the mantle support, substantially
as described with reference to Figs. 5 and 6 of the drawings annexed.
Dated this 10th day of November 1899.
Dated this 10th day of November 1899.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.