Improvements in or relating to Burners for Petroleum and the like Hydrocarbons.
Year: 1899

page_text: tion 4th Dec. 1899-Accepted, on Jan., 1000
tion 4th Dec.. 1899-Accepted, on wall.
COMPLETE SPECIFICATION.
Improvements in or relating to Burners for Petroleum and the like
Hydrocarbons.
communication from GUSTAV BARTHEL, Chemist, of, Kyffhäuserstrasse 27,
in the Empire of Germany,
I, ALFRED JULIUS BOULT, Chartered Patent Agent, of 111, Hatton Garden, in
he City of London, do hereby declare the nature of this invention and in what
hanner the same is to be performed, to be particularly described and ascertained
n and by the following statement:
The object of the present invention is a blue burner for petroleum or similar
ydrocarbons to be used for the purpose of heating, melting, boiling and the
ike. The invention is characterised by the arrangement of the gas or vapour
and air mixing chamber in a horizontal position and at right angles to the
direction in which the gas issues, the mixing chamber being formed between two
plates arranged at the least possible distance from each other above the nozzle
from which the gas or vaporised hydrocarbon issues, the said plates not being
connected with each other and permitting the mixture to pass out readily round
the edges of the upper plate without any obstruction in such a manner that the
flame is only formed on the mixture issuing from between the plates and striking
against the edge or flange provided for that purpose on the head of the burner.
The object of the invention is to produce a lamp which will burn without noise
and to prevent the flame from beating or flashing back.
Special importance is attached in the case of Bunsen or blue burners for
petroleum fuel cooking and heating devices to their burning without noise and
the efforts of my correspondent have been directed towards obtaining this result,
as well as to obtaining as hot a flame as possible. The means by which this is
obtained are an efficient current of air and the most intimate mixing of the
vapour or gas and air over an extended surface or travel. To obtain this an
arrangement has been devised according to which a vertical mixing tube pro-
5 vided below the head of the burner is passed over the top of the burner, and
the mixture of the gas and air passed again downwards in a kind of inverted cap
or hood. In connection with these burners it has been considered advantageous
that the mixing chamber, owing to its situation within the flame, should become
strongly heated. The flame in these burners is produced immediately on the
30 mixture of the gas leaving the hood serving as the gasifier or heater.
Such burners which burn almost without noise suffer from the great draw
back that the flame, especially when the pressure is very slight is apt to flas
backwards ie the flame burnt in the mixing chamber itself or immediatel
above the inlet nozzle, owing to which the main flame of the burner is yellow an
35 apt to smoke in consequence of the insufficient current of air.
The present invention absolutely avoids any possibility of the flame flashin
back, in consequence of the gas or vapour passing from the nozzle being force
before mixing with the air, to pass from a vertical direction to a horizont

page_text: A burner according to this invention is illustrated by way of example in the
accompanying drawings of which
Figure 1 is a vertical section, and
Figure 2 a plan.
Two horizontally arranged plates or discs b and c form between their adjacent
surfaces the mixing chamber, and are arranged at the least possible distance
apart and above an inlet nozzle a, which will admit the drawing in of a sufficient
quantity of air. This arrangement produces a very active current between the
plates forming the mixing chamber, the cold air which is principally drawn in
in a horizontal direction along and below the lower plate c producing a cooling
of the latter. The two plates and c are not connected with each other, the
upper plate being supported by its horizontal projections d resting against
the edge e of the top of the burner. The gas meets with no resistance as it passes
around the edge of the upper plate, meeting resistance only as it ascends and
strikes against projections f provided for that purpose on the edge e of the top
of the burner, for the purpose of forming the flame.
It is therefore impossible even with only a small pressure, i.e. with a small
flame, for the flame to flash back between the two plates b and c, and to burn
either there or immediately above the nozzle a, owing to the current produced
by the gas issuing from the nozzle and impinging upon the horizontal plate b and
to the current, passing through the very narrow space between the plates b and c,
being sufficiently strong to blow out any flame at these points.
This strong current, in connection with the horizontal current under the
plate c tends to keep the mixing chamber cool, which effect may be further
increased by selecting such materials for the construction of the said chamber as
are bad conductors of heat, such cooling of the mixing chamber tending to pre-
vent the ignition of the mixture.
The very narrow mixing chamber combined with a strong current effects
a very intimate mixing of the gas with the air owing to which the noise caused
by successive explosions is avoided, the burner burning with a comparatively
even flame.
Having now particularly described and ascertained the nature of the said
invention as communicated to my by my foreign correspondent and in what
manner the same is to be performed, I declare that what I claim is
1. Burners for petroleum and other hydrocarbons characterised by the
arrangement of a horizontal mixing chamber formed by two plates freely super-
posed one above the other, and above a vapour discharge nozzle, between which
plates the issuing vapour is flattened out and mixed with air, said mixture issuing
and burning round the edge of the upper plate, substantially as described.
2. In a burner of the kind described a vapour and air mixing chamber con-
sisting of a lower plate with a central perforation and an upper plate in close
proximity to the lower plate and around the edge of which the mixed air and
vapour issues.
3. A burner of the kind described comprising a cup-shaped body provided
with two superposed plates between which a supply of air and vapourised hydro-
carbons is passed and mixed and inward projections on the top of the body pro-
jecting into the path of the issuing gas mixture substantially as described.
4. The complete burner for petroleum and other hydrocarbons substantially
as described or illustrated in the accompanying drawing.
Dated this 4th day of December 1899.
BOULT, WADE & KILBURN,
Agents for the Applicant.