An Improved Vapour Burner for Petroleum Stoves.
Year: 1897

page_text: Date of Application, 28th May, 1897-Accepted, 3rd July, 1897
COMPLETE SPECIFICATION.
An Improved Vapour Burner for Petroleum Stoves.
I, JOHAN VICTOR SVENSON, of 44, Kungsgatan, Stockholm, in the Kingdom of
Sweden, 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 statement:-
This invention relates to a vapour-burner for petroleum-stoves, arranged so as to
cause the escaping vapour to be burned silently or, at least, without appreciable
noise, the construction of the burner being such as to make it more efficient and
easier to keep clean than other burners of the same kind. The silent burners
already known consist essentially of a cup placed above the usual ring-shaped
vaporizer and provided with a central funnel at the middle of which terminates
the upper end of a tube situated directly above the nozzle through which the
vapour escapes, said funnel being surrounded at some distance from it by another
funnel or bonnet resting on the bottom of the cup and provided at its lower edge
with apertures through which the vapour escapes, this vapour being substantially
ignited forming an annular flame which projects upward grazing along the edge
of the cup which shapes the flame. The vapour flowing upward through the tube
is compelled by the exterior bonnet to change its direction so as to move down-
wards before escaping from the burner for ignition, the absence of noise during
the combustion being due to this change in the direction of the vapour. Such a
burner, however, is not as efficient às might be desired, owing to the fact of the
vaporizer being situated below the flame and consequently the heating of said
vaporizer being effected principally by the heat conducted through the metal of
the cup. Moreover, in case the liquid heated on the stove boils over, this liquid is
apt to collect in the cup and here form a coating which is almost impossible to
remoye.
In the accompanying drawing,
Figure 1 is a vertical section and,
Figure 2 a plan view of the burner which forms the object of the present
invention.
1, 1 are the usual rising tubes for the oil, 2 is the horizontal burner channel,
the vaporizer, (which is shown annular in the drawing) 3 the tubes leading to
the nozzle 4, and 5 the tube located directly above the nozzle. This tube is
attached to a surrounding horizontal metal disc 6, which extends beyond the
burner tubes 1, 3. The tube 5 is surrounded at some distance from it by a bonnet 7
the top of which reaches above the upper orifice of the tube 5 and is closed, for
instance, by a cap 8 so as to be more easily accessible for cleaning. The lower edge
of this bonnet 7 is situated at a slight distance above the disc 6 and is fixed to a
second horizontal metal dise 9 which also extends beyond the tubes 1, 3, termin-
ating, however, a little inside the circumference of the disc 6. The two metal
discs 6 and are joined in such a manner that the current of vapour passing
between them can escape only through the annular opening between their outer
edges, the discs, for this purpose, suitably being united by means of short
tubes 10 surrounding loosely the respective tubes 1 and 3. Finally, there
07

page_text: is placed above the annular opening between the discs 6 and 9 a perforated
ring 11 for the escape of the vapour, said ring preferably being made of rounded
cross section. The vapour rushing out through the nozzle flows upward through
the tube 5, together with the air swept along, passes then downward between the
parts 5 and 7 and continuing its course horizontally between the metal discs 6
and 9 finally escapes through the ring 11. The flame formed is here brought into
contact with and caused to act upon the vaporizer above it, and, as a result, the
latter will be subjected to a more intense heat than when located below the flame,
the efficiency of the burner consequently being materially increased.
The burner just described dispenses with the cup forming a part of the silent
burners previously known, thus obviating the disadvantage referred to in connec-
tion with said cup.
It is evident that the vaporizer need not necessarily be of annular shape nor
consist of one or more tubes arranged around a central orifice but it might consist
of a retort or plate provided with a series of passages. The shape of the vaporizer
is unessential to the invention, though that shown in the drawing may be con-
sidered to best answer the purpose.
It is also easily understood that the upper edge of the tube 5 may be made to
reach to approximately the same level as the top of the bonnet 7, if the tube be
provided at the top with perforations furnishing free passage for the vapour to the
space between the tube and the bonnet.
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
An improved vapour-burner for petroleum-stoves, consisting of a tube (5)
located above the nozzle for the escaping vapour and carrying at the bottom,
below the vaporizer (2), a circular metal-disc (6) extending beyond the vaporiser,
and a bonnet (7) closed at the top and concentrically surrounding the tube so as
to form a space between them which space communicates with the interior of the.
tube at the top, and which bonnet (7) at its lower end, above the metal-disc (6),
carries a second circular metal-disc (9) nearly parallel to the former and termin-
ating with its outer edge a little inside that of the lower disc so as to form an
annular opening between said outer disc edges, below the vaporiser, said opening
being covered by a perforated disc or ring (11), the two discs (6, 9) first mentioned
being so united that the vapour flowing between them can escape only through the
annular opening.
Dated this 28th day of May 1897.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.