Improvements in and relating to Boiling, Cooking, and Heating Stoves.
Year: 1895

page_text: Date of Application, 19th Feb., 1895
Complete Specification Left, 18th May, 1895-Accepted, 29th June, 1895
PROVISIONAL SPECIFICATION.
Improvements in and relating to Boiling, Cooking, and Heating
Stoves.
I, THEOPHIL PFISTER, of 64 & 65 Holborn Viaduct, in the County of
London, Manufacturer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to boiling, cooking and heating stoves.
The chief novel feature of my invention consists in the provision of an annular
boiler which is adapted to be placed around the flame of an oil, gas or other stove
or lamp in such a manner that the central chamber extending through the said
boiler acts as the chimney, flue or combustion chamber for the said stove or lamp.
The water contained in the boiler, surrounding the oil or gas flame or other source
of heat, will by this means be very quickly and efficiently heated. A tap is
provided for drawing off the heated water when desired..
I also so arrange that the products of combustion and the heated air which pass
out at the top of the central flue or combustion chamber may serve for heating the
contents of kettles or other cooking utensils which are placed over the mouth
thereof.
I sometimes place a cooking oven over and above the combustion chamber and
boiler aforesaid. The products of combustion and heated air will then pass into
or around the oven and thereby heat the same.
The said oven is preferably carried on and supported by a framework separate
from the stove itself.
"
The steam generated in the boiler may be utilized by leading it through pipes,
into a
66 steamer provided on the top of the said oven for cooking vegetables
cr other articles of food that require steaming,
One or
more steam coils may be provided in communication with the boiler
for heating the air in a room in place of or in addition to the said oven.
Dated this 19th day of February 1895.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in and relating to Boiling, Cooking, and Heating
Stoves.
I, THEOPHIL PFISTER, of 64 Holborn Viaduct, in the County of London,
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 :-
My invention relates to apparatus for boiling, cooking and heating, chiefly¹by
means of oil lamps or stoves, and comprises the novel elements or parts and
combinations of the same hereinafter described.

page_text: The chief. novel feature of my improved apparatus is an annular boiler so
combined with the oil, or other lamp or stove that the inner wall of the boiler
acts as the chimney or flue of and forms the combustion chamber for the lamp
or stove. I dispense with the ordinary chimney usually possessed by such a lamp
and thereby bring the flame of the lamp in direct contact with the inner wall of the
boiler.
I sometimes provide the lamp or stove with an inner and an outer gauze or like
perforated chimney between which the flame burns without causing smoke. In this
case I admit air at the lower end of the inner chainber of the boiler to assist in
supporting combustion.
I will now proceed to describe my improved apparatus in detail with reference to
the accompanying drawings wherein,
Figure 1 is a front elevation of my improved boiling and cooking apparatus, a
portion of the boiler and of the oven and one of the steamers being shown in
section.
Figure 2 is a vertical section of the oven detached.
Figure 3 is a similar section of the boiler.
Figure 4 is a front elevation of the lamp and boiler as used for heating purposes
without the cooking apparatus.
Figure 5 is a vertical section of the lower part of a modified form of boiler
applied to a lamp shown in elevation.
Like letters of reference denote corresponding parts throughout the drawings.
A is a centre-draught oil lamp or stove for supplying heat for boiling,
heating and cooking as hereinafter described; B is the boiler resting on a
stand C. This stand also supports the lamp which rests on a shelf C. D is
the oven supported by a stand E. F, F'arc steamers or vessels in which
vegetables and the like are cooked by means of steam derived from the water in
the boiler B.
The boiler is of annular construction being formed by an outer cylindrical shell 6
and an inner concentric cylindrical shell 6 united by end plates 62, 62 in any
suitable manner.
The bottom end plate is perforated at the centre and is furnished with a circular
downwardly projecting flange or lip b³ adapted to fit tightly around the gallery of
the lamp or stove to prevent the entrance of air into the space within the inner
shell 6 of the boiler save through the burner of the lamp. The said inner shell
preferably extends above the top of the boiler as shown clearly in Figure 3 and is
open at the top. By this construction the said shell 6' is made to serve as the
chimney for the lamp and to form a combustion chamber in which the flame of the
lamp will burn without smoking. The usual lamp chimney is dispensed with and
the flame and products of combustion are thus allowed to come in direct contact
with the boiler whereby the heating effect obtained is very great. To allow of
filling and replenishing the boiler with water when required I provide the outer
shell 6 with an inlet orifice, Figure 3, and a lip or spout 65. 66 is a tan for
drawing off hot water and for emptying the boiler when required. ', bare
bandles for use when lifting the boiler.
The heated air passing up through the boiler enters the oven through the
opening d Figure 2 in the bottom thereof. The upper projecting part of the inner
shell of the boiler fits into the said opening d and prevents loss of heat between the
boiler and the oven. I place above the opening d a dish or tray d¹ resting on short
standards d. This dish spreads the heated products of combustion coming from
the lamp and distributes them more or less equally throughout the oven. The
sides of the oven extend upward above or beyond the crown plate d³, and they are
fitted with a second plate d' between which and the crown plate d³ is a shallow
space d. The crown plate d³ is pierced with openings ds to allow the heated
products of combustion to escape from the oven into the space d³ whence it
passes out through openings in the top plate d'. The openings are
arranged to receive the wells f, see Figure 1, of the vessels or steamers F which

page_text: are thereby kept warmer than they would be if the bottoms of the steamers
were flat.
The cooking of vegetables and the like is effected in the steamers F by steam
generated in the boiler B. The steam is conducted through a pipe G leading from
the boiler up through the oven to branch outlets g, one such branch being provided
for each steamer F and being arranged to enter an open pipe F' fixed to the
bottom of the steamer and extending to near the top thereof. When it is desired
to stop the entrance of steam into any one of the steamers F or when all or any of
such steamers are not in use the ends of the outlets gare closed by plugs g'inserted
in the ends of the said outlets. These plugs are attached by chains to their
respective branch pipes and they can be inserted and removed as required when the
steamers Fare removed. d³, ds are handles by which the oven can be conveniently
lifted.
When the boiler B is used for heating and boiling purposes without the cooking
apparatus I preferably cover the top thereof by an ornamental perforated piece H
Figure 4. When it is to be used for circulating hot water for heating greenhouses
for example I plug the opening 6 and provide an outlet pipe J at the top
and a return pipe J' near the bottom. The pipes J, J' are connected together by
any suitable coil or system of pipes extending around the greenhouse or other room
to be heated.
In Figure 5 I have shown a modified form of boiler in which openings are
provided in the bottom end plate to admit air to the central chamber. In this case
it is necessary to provide special means to prevent the lamp from smoking. One
arrangement which I have found very effective for this purpose consists of two
perforated or gauze cylinders K, K¹ one carried by the inner wick tube and the
other by the outer wick tube. The oil burns with a blue flame without smoke in
the annular space between these cylinders.
The boiler may be used for the preparation of beverages, and the annular water
space may be divided into two or more compartments if desired by suitable division
plates, so that each compartment can be used for preparing a separate beverage.
Each compartment will then be fitted with a drawing-off tap.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. The combination with an oil or other lamp or stove of an annular boiler
the inner shell of which serves as the chimney for the lamp, substantially as
described.
2. In such a combination, the flange or lip formed on the boiler and
adapted to fit the lamp gallery substantially as, and for the purpose, described.
3. The combination of an oil lamp A, an annular boiler B, surrounding the flame
of the lamp and forming a chimney therefor, an oven D receiving heat from the
lamp, steamers F, a pipe G having branches 9, for conveying the steam from the
boiler to the steamers, and stop plugs g' for closing the branches g, substantially
as described.
4. Apparatus constructed substantially as described with reference to Figure 1
or to Figure 4, or to Figure 5, for the purposes specified.
Dated this 16th day of May 1805
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.