Year: 1897

page_text: Date of Application, 14th July, 1897
Complete Specification Left, 14th Apr., 1898--Accepted, 14th May, 1898
I, PAUL SCHROEDTER, Merchant, of 65, Oranienstrasse, Berlin, in the Empire of
Germany, do hereby declare the nature of this invention to be as follows:
The present invention refers to an incandescent gas burner which is formed of
two or more complete burners placed one over the other and to which the tube
conducting the mixed gas is common. It serves the purpose of heating equally
throughout their length hollow incandescence bodies of any shape and of any
desired length.
In one form of construction, above the burner rises a second burner with inlet
tube, burner head and top covering plate. Corresponding to the upward contract-
ing shape of the incandescence body, the top burner head is of smaller diameter
than the lower one. Each burner head lies close to the mantle, the heating effect
of the lower burner head extends to the outlet of the top burner head and the
heating effect of the latter to the apex of the incandescence body. Whilst a larger
part of the upward flowing mixture of air and gas passes for combustion into the
lower burner top and heats the larger lower part of the incandescence mantle, a
smaller portion of the mixture flows through the supply tube to the smaller burner
and brings the top part of the mantle to incandescence.
For very long mantles three or more separate burners may be arranged con-
centrically over each other in the form of a pyramid. The number of, and the
space between, the burners is arranged according to the length breadth and shape
of the incandescence mantle.
In a second form of construction, grouped tube burners are used. On the
Bunsen tube is similarly fitted the uptake tube which opens out trumpet shaped,
and thus forms the mixing chamber. The top closing plate of the latter is pro-
vided at its outer edge with a circle of holes above which rises a circle of tubes.
Above these tube burners there is concentrically arranged a second smaller burner
similarly formed.
The upper supply tubes can either fit on the top plates of the lower burner or
extend into the Bunsen tube.
In all forms of construction the system of separate burners can be as desired
and all the separate burners may be either similar or different. Thus for example
the first row may be a plate burner, the second row a tube burner and the third
row a circular slot burner. For the top row also a tube shaped incandescence body
carrier may be used as the conductor for the gas and air mixture, provided at a
suitable height with side outlet openings and a burner head surrounding the same.
Dated this 14th day of July 1897.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.

page_text: I, PAUL SCHROEDTER, Merchant, of 65, Oranienstrasse, Berlin, in the Empire of
Germany, 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:
The present invention refers to an incandescent gas burner which is, formed of
two or more complete burners placed one over the other and to which the tube
conducting the mixed gas is common. It serves the purpose of heating equally
throughout their length hollow incandescence bodies of any shape and of any
desired length.
In one form of construction, above the burner rises a second burner with inlet
tube, burner head and top covering plate. Corresponding to the upward contract-
ing shape of the incandescence body, the top burner head is of smaller diameter
than the lower one. Each burner head lies close to the mantle, the heating effect
of the lower burner head extends to the outlet of the top burner head and the
heating effect of the latter to the apex of the incandescence body. Whilst a larger
part of the upward flowing mixture of air and gas passes for combustion into the
lower burner top and heats the larger lower part of the incandescence mantle, a
smaller portion of the mixture flows through the supply tube to the smaller burner
and brings the top part of the mantle to incandescence.
For very long mantles three or more separate burners may be arranged con-
centrically over each other in the form of a pyramid. The number of, and
space between the burners is arranged according to the length breadth and shape
of the incandescence mantle.
In a second form of construction, the grouped tube burners are used. On the
Bunsen tube is similarly fitted the uptake tube which opens out trumpet shaped,
and thus forms the mixing chamber. The top closing plate of the latter is pro-
vided at its outer edge with a circle of holes above which rise a circle of tubes.
Above these tube burners there is concentrically arranged a second smaller burner
similarly formed.
The upper supply tubes can either fit on the top plates of the lower burner or
extend into the Bunsen tube.
In all forms of construction the system of separate burners can be as desired
and all the separate burners may be either similar or different. Thus for example
the first row may be a plate burner, the second row a tube burner and the third
row a circular slot burner. For the top row also a tube shaped incandescence body
carrier may be used as the conductor for the gas and air mixture, provided at a
suitable height with side outlet openings and a burner head surrounding the same.
In the accompanying sheet of drawings Figs. 1 and 2 are sectional elevation
and plan respectively of an incandescent gas burner constructed according to this
invention and Figs. 3 and 4 are similar views of an incandescent gas burner of
modified construction.
Referring to Figs. 1 and 2, a is the Bunsen tube b the uptake tube, c the burner
head and the perforated top covering plate. Above this burner is a second
burner, with inlet tube b¹, burner head c and perforated top covering plate a³.
Corresponding with the narrowed form of the incandescence body, the upper
burner head c¹ is of smaller diameter than the lower one c. Each of the burner
heads lies close against the mantle; the heating effect of the lower burner head
extends to the outlet of the top burner head, and the heating effect of the top
burner head to the apex of the incandescence body. Whilst the larger portion of
the upward flowing mixture of air and gas enters the burner head c for combustion
L

page_text: and heats the larger lower half of the mantle, the smaller portion of the mixture
flows through the inlet tube 61 into the smaller burner head c¹ and makes the upper
end of the mantle completely incandescent.
For very large mantles three or more separate burners can also be arranged con-
centrically in the form of a pyramid one above the other.
The number and the distance apart of the burners is regulated according to the
length breadth and form of the mantle.
In the form of construction shown in Figs. 3 and tube burners are combined
in the manner described. Here the inlet tube b on the Bunsen tube a is widened
at c, trumpet shape and so forms the mixing chamber e. The top closing plate f
is furnished on its outer border with a circle of holes g above which is a circle of
tubes h. Above this tube burner a second smaller burner of a similar construction
is concentrically arranged, the corresponding parts of which are indicated
by b c e f g¹ and h¹.
The upper inlet tubes 61 may be seated either on the plates & or f or extend
below into the Bunsen tube a.
In all forms of the invention the system of separate burners may be as preferred,
and all the separate burners be of the same or of a different kind. For example
the first stage may have a perforated plate burner, the second a tube burner and the
third a circular slot burner. Moreover for the top stage a tube shaped incandes-
cence body carrier may be used as inlet tube for the air and gas mixture, and be
furnished with side outlet openings formed at a suitable height and a burner head
enclosing the same.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
:-
1. An incandescent gas burner composed of two or
situated one above the other and having
more complete burners
a common mixing tube the whole arranged
for uniformly heating large mantles substantially as described.
2. The incandescent gas burner substantially as described with reference to the
drawings.
Dated this 14th day of Anril 1900