Improvements in Burners for Lamps for Burning Hydro-carbon Oils for the Production of Light or Heat for various purposes.
Year: 1891

page_text: Date of Application, 14th Apr., 1891-Accept d. 16th May, 1891
COMPLETE SPECIFICATION.
Improvements in Burners for Lamps for Burning Hydro-carbon Oils
for the Production of Light or Heat for various purposes.
We HENRY DARBY, WALTER DARBY, and lox DARBY all of 249 Penton-
ville Road in the County of Middlesex Lamp, Stove, and Gas-heated Bath
Manufacturers 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 :-
and
Our invention relates to improvements in burners for lamps for consuming
hydro-carbon oils for the production of heat or light for various purposes
the chief object of our improvements is to so construct and arrange such burners
that the quantity of air shall be such and so controlled as to effect the more perfect
combustion of the hydro-carbon oil supplied to the wick or wicks and thus prevent
the conversion of any excess of oil into smoke as is commonly the case with
illuminating and heating lamps of this description and a further object of our said
invention is to cause the flame to assume a form somewhat analogous to the flame of
the well known “Argand " gas burner-thus by our present improvements we are
enabled to use a cylindrical chimney in place of the ordinary "bulge" glasses
hitherto commonly used with flat wick hydro-carbon burners of the character in
question, but other shaped chimneys can be used if desired.
One great advantage we claim to obtain by our present improvements is that our
burner will not deposit soot or carbon in the chimney even if the wicks are not
properly trimmed as all the products of combustion are carried straight up and out
of the said chimney.
In the first place we may here remark that the burner of an ordinary duplex
lamp can be readily converted into a burner of our improved construction and for
the sake of example we will proceed to describe a duplex burner.
And in order that our present invention may be easily understood and readily
carried into practice we will proceed to describe the same with reference to the
drawings hereto annexed Figure 1 of which shows a transverse section and
Figure 2 a plan of the burner of a duplex lamp for barning hydro-carbon oils in
accordance with our said invention.
We use only one slot or aperture in the dome a for the exit of the two flames
from the two Hat wicks (shown in this arrangement) the width of the slot being
less than the length of the wick and the length of the slot being rather greater
than the length of the wick by which means the flames of the two wicks are
slightly deflected or drawn inwards but not to such an extent as to cause the two
flames to combine or impinge upon one another as is the case in some lamps of some-
what similar construction.
In addition to the air which is admitted from the body of the burner at e to the
interior of the dome a we cause additional air to be admitted thereto through small
apertures e e immediately below the gallery a' for the chimney d (which latter is
raised up a little higher than usual for this purpose) such additional air serving to
effect more perfect combustion and also prevents the production of smoke from
imperfect combustion.
We also find it advantageous for lighting purposes to admit air at e² between the
inside of the chimney d and the outside of the dome a (thus impinging on the outer
surface of the flame) so as to help to keep the glass d cool.
We find that any ordinary variation in the height of the two wicks bb and flames
does not affect the perfect combustion thereof.
The number of the wicks b and the shape of the slot or aperture in the dome a
may be varied if desired and the air be admitted thereto in like manner to that

page_text: previously described in accordance with our improvements thus for instance if three
wicks be used in the form of a triangle the slot or aperture in the dome a would
likewise be of a triangular form rather larger than the triangle formed by the wicks
and similarly if four wicks be used in the form of a square or diamond or oblong or
the like the aperture in the dome a would be formed to correspond.
Each flame from each wiek where two or more wicks are used in our lamp will
remain quite distinct and separate from each other and will not blend with each
other but will rise straight up the chimney d after the manner of the flame in an
Argan burner.
We use a cyn Irical chimney d the inner circumference of which is slightly
larger than the greatest with of the aperture in the dome a.
When Lamp having a single wick only is used in carrying out our improvements
we use a slot in the dome of corresponding proportions in relation to the wick to the
slot as previously described for two wicks the wick being in the centre thereof and
the air being admitted to the interior (and for lighting purposes only to the exterior)
of the dome in like manner to that previously described as applied to the duplex
burner.
Our improvements admit of the use of a gallery raiser for the purpose of
lighting the lamp-and any suitable extinguisher et cetera may be applied as
desired.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we would remark that we
are fully aware that in burners for lamps for burning liquid hydro-carbon oils
a slotted dome surrounding one or more wicks has previously been used and
we make no separate claim whatever to such dome broadly but what we do
claim is: :―
1. A dome such as a having small apertures therein such as e immediately below
the chimney gallery through which small apertures c air is admitted direct from
the outside atmosphere to the interior of the said dome substantially as and for the
purposes herein before set forth.
1r
2. The combination with a dome such as a of a series of small holes or openings
such as carranged immediately below the chimney gallery so as to freely ad
through these small apertures direct from the outside atmosphere to the inte
of the dome substantially in the manner and for the purposes hereinbefor
forth.
Dated this 1441. 1. Ր
די
1001
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Patentees.