Improvements in Wickless Petroleum Stoves.
Year: 1895

page_text: Date of Application, 18th June, 1895
Complete Specification Left, 17th Mar., 1896-Accepted, 18th Apr., 1896
PROVISIONAL SPECIFICATION.
Improvements in Wickless Petroleum Stoves.
I, CARL ÖSTLUND, of 3 Lilla Gråbergsgatan, Stockholm, Sweden,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to wickless petroleum stoves of the kind in which
petroleum is forced up from a reservoir through a pipe or channel to the burner
by means of air pressure created in the petroleum reservoir by heat from the
flame, and it has for object to ensure that a suitable quantity of air shall be
retained in the upper part of the petroleum reservoir on petroleum being
supplied to such reservoir, said part of the reservoir thus forming an air-chamber.
To this end according to my invention a considerable (it may be the greater)
part of the reservoir is situated above the mouth of the petroleum supply aperture
so that this part of the reservoir forms an air-chamber, and consequently a quantity
of air always remains there when the petroleum is supplied. This may be effected
by providing a tube under the supply aperture extending sufficiently far down into
the reservoir, or by providing other suitable means to prevent the petroleum rising
above a certain level, so that a sufficient part of the reservoir must remain filled
with air. Such air is heated by the heat from the burner and imparts the
that is necessary to force the petroleum up to the burner the use of an air-pump
for the purpose being thus rendered unnecessary.
Dated this 18th day of June 1895.
pressure
.F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Wickless Petroleum Stoves.
I, CARL ÖSTLUND, of 3 Lilla Gråbergsgatan, Stockholm, 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 improvements in wickless petroleum stoves and has for
its object to dispense with the air pump hitherto employed for forcing up the
petroleum to the burner. For this purpose an air chamber is provided in the
upper part of the petroleum reservoir, in which chamber the necessary pressure is
imparted to the air by means of the heat from the flame.
To this end, according to my invention a considerable (it may be the greater)
part of the reservoir is situated above the mouth of the petroleum supply aperture
so that this part of the reservoir forms an air-chamber, and consequently a quantity
of air always remains there when the petroleum is supplied. This may be effected
by providing a tube under the supply aperture extending sufficiently far down into
the reservoir, by pressing up the cover of the reservoir so as to form a second
reservoir or air chamber, situated above the mouth of the petroleum supply
aperture, or by providing other suitable means to prevent the petroleum rising
Price 8A I

page_text: above a certain level, so that a sufficient part of the reservoir must remain filled
with air. Such air is heated by the heat from the burner and thereby establishes
a pressure by means of which the petroleum is forced up to the burner. As the
petroleum is consumed, the said air pressure diminishes, and the air chamber in the
upper part of the reservoir must therefore contain a volume of air large enough
for ensuring a sufficiently great pressure on the petroleum, even when the air in
the reservoir has expanded, so that the stove will burn as long as there is petroleum
in the reservoir. The use of the ordinary air-pump hitherto employed for the
purpose of forcing the petroleum to the burner is thus rendered unnecessary, and
this constitutes an essential feature in the present invention.
In the annexed drawing is shown a vertical section of a petroleum stove
according to this invention. a is the petroleum reservoir, b the pipe leading from
the petroleum reservoir to the burner c; d is the tube under the supply aperture.
e is a number of metal blades projecting into the air chamber and fixed to the pipe b
and to the cover of the petroleum reservoir in order to facilitate the heating of the
air in the air chamber. These blades or projections may however be omitted.
It will be evident that owing to the arrangement of the tube d beneath the
petroleum supply aperture, the reservoir cannot be filled with petroleum, as when
it is filled up to the lower mouth of said pipe d the air remaining in the reservoir
has no longer an opportunity of escaping. Thus a certain quantity of air always
remains in the upper part of the reservoir and being heated by the heat from the
burner, establishes a pressure on the upper surface of the petroleum, whereby
petroleum is forced up to the burner. Said air chamber thus makes the use
of the ordinary air pump unnecessary;
The tube d may be given a curved shape as shown in dotted lines in the figure
and marked d', and the lower part d" of said tube may if required be adapted to
fit against the inner wall of the petroleum reservoir as shewn in order to facilitate
the emptying of the petroleum reservoir.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a wickless petroleum stove the arrangement of the upper part of the
petroleum reservoir as an air chamber of such a capacity that the air remaining
therein and being heated by the heat from the burner establishes a pressure
sufficiently great for forcing up the petroleum to the burner, substantially as and
for the purpose described.
2. In a wickless petroleum stove the use of a tube under the petroleum supply
aperture and extending downwards into the reservoir, substantially as and for the
purpose described.
3. My improved wickless petroleum stove constructed as described and shewn.
Dated this 17th day of March 1896.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.