Improvements in Lamp' Burners.
Year: 1896

page_text: Date of Application, 30th Apr., 1896-Accepted,. 6th June, 1896
.COMPLETE SPECIFICATION.
Improvements in Lamp' Burners.
I, FRITZ DEIMEL, of 8 Luisen Ufer, Berlin, Germany, Manufacturer,..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
staternent :-
This invention bas. for its object improved constructions of burners "more
particularly for incandescent, gas lamps, and it relates not only to peenliar forms of
the burner head and mixing chamber, but also to an adjusting device which not
only allows, of the centering of the incandescent mantle base relatively to the
burner head to be effected from the outside but also, by means of its lower enlarged
part provided with air inlet, openings, it allows of, the admission of combustion-air
supply to the interior of the mantle.
I will describe the.. invention with reference to the accompanying drawings in
which
Fig. 1 shews a longitudinal section and Fig. 2 a cross section on line X X of
Fig. 1.
Eigs. 3 and 4 shew the device for centering the mantle from the outside and for
the admission of combustion-air to the burner head, both in the open and closed
positions.
Figs. 5.and 6 shew. the burner head with the mixing chamber in 'elevation
and plan.
.
Figs. 7 and 8 shew. another arrangement for centering the mantle from the
outside and for the supply of air to the burner head.
The burner head. a consists of a conical frustrum having slotted openings b, and
which is closed at top by a disc c, which supports the mantle carrier d in the known
manner, and which, for reasons to be presently stated, projects slightly beyond the
upper end of the cone.
The.diameter of the burner head is considerably smaller than that of the mixing
chamber e and of the base of the mantle, in order that, within the mixing chamber,
by means of the greater width of this, followed by the restriction of the burner
head, a perfect mixing of the air supply and gas. may be effected, while the bottom
of the mantle is-not, as heretofore, brought in contact with the burner head, thus
preventing premature destruction of the former. At the same time, the arrange-
ment for centering the mantle from the outside and for supplying air to the interior
of the mantle, serves to maintain the symetrical form of the mantle permanently
during use. Also, by the. introduction of combustion-air into the mantle, the
incandescence hereof is:increased.
The upper part of the mixing chamber e is surrounded to about the height of the
base of the burner head by plates g having an outward spring action,. which plates
are enlarged, at the lower part, forming a projecting bead, and are there provided
with air inlets h.
A ring k provided with bandles i embraces the. plates g in such manner that when
it is pushed upward it, presses the plates together so as to form a cylinder,which
causes the air entering. through. the slits h to be led to 'the interior of the mantle
and consequently, also to the burned head, and at the same time serves to bring the
mantle into.a.central position.
The above described.platesy with outward spring action can also be replaced by
hinged semi-cylindrical plates g' moveable. outwards and capable of being closed by

page_text: a closing device k as shewn at Figs. 7 and 8, the essential feature in either
arrangement being the same, namely the arrangement of a cylindrical casing
surrounding the mixing chamber at the upper part and having air openings at the
lower part, such casing being divided into two or more closable parts, and serving
both to centre the mantle and to lead an air supply to the interior thereof.
The peculiar construction of the burner head a, as conical frustrum having air
slits, has the action that the mixture of gas and air flowing through the mixing
chamber e and pressed somewhat together in the upper part, has a tendency to
spread outward and upward against the inner surface of the mantle on issuing from
the slits, which tendency is increased if the disc c covering the burner head projects
with its rim slightly beyond the latter.
เ
The new burner is closed at bottom by a cage which carries the gallery m for
the chimney glass o and is provided with air openings n.
When the chimney glass o has been inserted in its gallery m, the air supply for
combustion can only enter the glass from below through the bottom of the burner
cage l, through the air holes n.
The body of air entering at the bottom of the glass o divides in rising, one portion
passing through the slits h to the burner head and interior of the mantle, while the
other part passes directly up the chimney glass, in contact with the outer surface of
the mantle.
It will be readily seen that the improved burner will act very advantageously as
compared to the existing burners serving for the same purpose, as by means of the
peculiar form of the burner head all contact between it and the lower part of the
mantle is prevented, and a centering of the mantle is effected from the outside by
means of the peculiar device surrounding the upper part of the mixing chamber,
while a greatly improved distribution of the air supply for combustion is effected,
so that a very considerably increased heating action of the burner is produced.
The above described arrangements shewn at Figures 3 and 4, 7 and 8 for
centering the mantle from the outside, and for supplying air for combustion to the
iuterior of the mantle and burner head, whether in the form of spring plates, or
of a divided ring, or in the form of a closed ring as shewn at Figures 9 to 13,
can also be applied with advantage to burners of different construction, which also
serve the purpose of heating or illumination through the medium of incandesence
bodies. Figure 9 shews a longitudinal section through a burner with the new
device for centering the incandesence mantle and for supplying air for combustion.
to the interior thereof, the head of the burner being formed of circularly arranged
tubes. Figure 10 shews the centering device detached for fitting over the burner
head.
Figure 11 shews.a section on line - Figure 9, Figures 12 and 13 shew an
elevation and plan of the burner head, in which the mixing chamber is
surrounded at its upper part by a cage 2 having air openings 3, and terminating
at top in a gallery 4. The mixing chamber 1 is closed at top by a plate 5 in
which are inserted a number of small tubes 6 arranged near together in a circle,
and forming the burner head, the open ends of which tubes are flattened as
shewn at Figure 13, in order to form the issuing gas and air mixture into closely
abutting flat jets issuing under some pressure, the combined area of such openings
being for this purpose made considerably less than the area of the upper part of
the mixing chamber. The mixture of gas and air is effected in a perfect manner
in the chamber 1 by causing the current of air and gas in rising to strike against
the base 5 of the burner head. The tubes 6 are so arranged in the plate 5 that
passages 7-are formed between them which allow the air currents that are directed
inwards by the centering device, and air separator 8; to enter into the interior of
the burner head on its way to the flame. The air separator 8 is bere made in
form of a gallery; it surrounds the burner head 6, 7, and forms at its upper part a
close ring 8' while the lower part, at about the height of the base 5 of the burner
head, is formed with an enlargement at 8" having openings 9.
When the chimney glass 10 is inserted in the gallery 4, then, as described with

page_text: the first arrangement, Figures 1 to 8, air can only pass into the glass from below
through the base of the burner head namely, through the openings 3.
The body of air entering the lower end of the chimney glass is also divided by
the air separator 8 in rising, the air passing mostly through the openings 9 of the
same, and the passages 7 of the burner head, to the interior of the flame, while
the other portion of the entering air passes directly up the chimney glass against
the outer surface of the incandescence mantle, if the burner is used in combination
with such a mantle.
As, by the introduction of the peculiar air separator 8, between the burner head
and the chimney glass a considerably increased air supply to the iuterior of the
heating flame and of the mantle is effected automatically, that is to say, without
the use of special manually operated devices (as with the blow pipe lamps) for
this purpose, it will be seen that by this invention the production of a strongly
oxydizing heating flame is effected in the simplest possible mauner, and in addition
means are provided by which the incandescence mantle can be brought into a
central position from the outside, and be protected at its lower end.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. A lamp burner, with burner head of smaller diameter than the mixing
chamber and consisting of a conical frustrum, having lateral slits or openings, and
closed at the upper end by a disc, preferably projecting beyond the burner head,
while the tapered mixing chamber is surrounded by spring plates, or by a divided
cylindrical shield the lower part of which plates or shield is enlarged, and has air
inlets and is provided with external means whereby the plates or shield can be
closed together, so as to cause air to penetrate through the said air inlets to the
burner-head and interior of the incandescence body, while the latter is at
the same time brought to a central position thereby, substantially as and for the
purposes described.
2. In a burner such as is referred to in the first claim, constructing the burner
head of small tubes such as 6 preferably arranged in a circle upon a base 5 and
having their upper ends flattened so that the jets of gas and air mixture issuing
under pressure therefrom are closely contiguous to each other, while narrow
openings 7 intervene between the lower parts of the tubes through which
openings a portion of the air supply is directed by the centering device and air
separator 8, substantially as described with reference to Figures 9 to 13 of the
drawings.
Dated this 30th day of April 1896.
ABEL & IMRAY,
Agents for the Applicant.