Improvements in and relating to Oil Cooking Stoves or Ovens.
Year: 1896

page_text: Date of Application, 15th Feb., 1895
Complete Specification Left, 14th Nov., 1896-Accented. 16th Jan.
1897
Date of Application, 15th Feb., 1895
Complete Specification Left, 14th Nov., 1896-Accepted. 16th Jan 1897
PROVISIONAL SPECIFICATION.
Improvements in and relating to Oil Cooking Stoves or Ovens.
I, THEOPHIL PFISTER, of 65 Holborn Viaduct, in the County of London,
Manufacturer, do hereby declare the nature of this invention to be as follows:-
This invention relates to cooking stoves or ovens heated by a central draught oil
lamp. In oil cooking ovens as hitherto usually constructed the cooking operation
has been performed above the lamp only and the heat given out laterally has
therefore been largely wasted. I am aware that oil cooking ovens have been
constructed to be heated by flat-wick lamps placed within the oven and that in
such cases the whole of the heat of the lamp is utilized but the lamp was invariably
placed near the side of the oven and thus a great proportion of the heat was lost
by radiation from the overheated wall of the oven.
According to my invention I provide a central draught lamp in the middle of
the oven, in which position the heat of the lamp is most effectively and efficiently
utilized, and I arrange that the oil well or body of the lamp shall be below and
outside the oven whilst the whole of the lamp flame, which is surrounded by a
metal chimney is within the oven. I provide a suitable shaped recess in the floor
of the oven to receive the lamp gallery or collar which is fully closed in by means
of a sliding or other movable part of the floor of the oven placed in position after
the lamp has been introduced into the oven. By the reverse operation the lamp is
readily removed. By these means the heat of the oven is conserved whilst at the
same time the oil body of the lamp being outside the oven is kept cool. The
body of the lamp is supported on a suitable stand which also serves to support
the oven.
The oven may be of any suitable form but I prefer to provide it with a central
or lamp chamber and with two side chambers, each of which latter may he
provided with fixed or movable horizontal trays, or partitions preferably
perforated or otherwise formed so as to allow of the free circulation of the
heat through them. I may provide suitable dampers between the central and
side chambers so that the heat in the side chambers can be regulated as desired.
All the chambers are provided with doors. Behind and partially around the lamp
chimney in the central chamber I sometimes arrange a boiler from which by means
of a suitable pipe and tap the water can be drawn off when required, at the front
or side of the oven. I arrange that the walls of the oven extend some distance
above the top of the lamp chimney and at the level of the top of the said chimney
I provide a metal plate which fits over the oven within the containing walls thereof
an opening being left in the said plate immediately above the top of the chimney.
Above the top of the walls of the oven is also provided another metal plate which
forms with the lower plate a hot chamber. Suitable openings are provided in the
top plate over which can be placed pots or pans for heating, boiling or cooking
purposes. I prefer that there shall be no opening, in the upper plate, directly
over the lamp. In order to more fully concentrate the heat in the upper hot
chamber I preferably divide off parts of the said chamber by two partitions
extending across the chamber. The said partitions are perforated for the passage
of the products of combustion from the lamp as are also the outer walls of the side
upper chambers.

page_text: The top plate of the upper chamber is made double and packed with asbestos to
conserve the heat. The whole or parts of the walls of the oven may also be made
double and be packed with asbestos.
Dated this 15th day of February 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.
Improvements in and relating to Oil Cooking Stoves
vens.
I, THEOPHIL PFISTER, of 65 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 :-
This invention relates to a cooking stove or oven heated by a central draught
oil lamp in such a manner that the products of combustion from the lamp are not
allowed to enter the oven.
In the accompanying drawings which represent an oil cooking stove or oven
constructed according to my invention,
Figure 1 is a vertical longitudinal central section and
Figure 2 a vertical transverse central section thereof.
Figure 3 is a plan of a sliding plate or door hereinafter described.
In these figures A indicates a central draught oil lamp placed in the middle of
the oven B, in which position the heat of the lamp is most effectively and efficiently
utilized, the oil well or reservoir of the lamp being arranged below and outside the
oven whilst the whole of the lamp flame which is surrounded by a metal chimney C
is within the oven. A suitably shaped recess in the floor b of the oven is provided
to receive the lamp gallery or collar c which is completely closed in by means of a
sliding plate d which is placed in position after the lamp has been introduced into
the oven. By the reverse operation that is to say, after the withdrawal of the
sliding plate d, the lamp may be readily removed. By these means the heat of
the oven is retained whilst at the same time the oil reservoir a of the lamp
being outside the oven is kept cool. The lamp is supported on a suitable
stand D.
The oven B may be of any suitable form. e, e are fixed or movable horizontal
trays or shelves similar to those usually provided in ovens for supporting the
substances to be cooked. Doors are provided at the front of the oven for
giving access to the interior. Behind and partially around the lamp chimney
I sometimes arrange a boiler or water heater E from which by means of a
suitable pipe g and tap the water can be drawn off, when required, at the
front as shown or at the side of the oven. The boiler is filled through an
inlet Fat the back of the oven. The side walls of the oven are extended
upwardly to form a hot chamber above the oven into which chamber the
products of combustion from the lamp pass through an opening provided in the
roof G of the oven immediately above the top of the chimney. The said opening
is fitted with a ring i which surrounds the upper end of the chimney and prevents
the entrance of the products of combustion from the lamp into the oven. Suitable
openings jare provided in the top plate H of this hot chamber over which openings
can be placed pots kettles or pans for heating, boiling or cooking purposes.
I sometimes provide a crown or ring K baving a serrated top upon which the
pot or other vessel may stand; the hot products of combustion can pass outward
between the serrations in immediate contact with the vessel standing thereon which

page_text: by this method can be very efficiently heated. If any liquid should fall through the
openings j, its entry into the chimney is prevented by a raised rim or flange G
upon which the ring i is placed. In order to more fully concentrate the heat in the
hot chamber I preferably divide off parts of the said chamber by two partitions k
extending across the same. The said partitions are perforated for the passage of
the products of combustion from the lamp as are also the outer walls of the hot
chamber as shown at 7 in Figure 1.
A plate rack J is provided at one end, or at each end of the stove in which rack
plates or dishes may be placed to be warmed.
The top plate of the hot chamber may be made double and packed with asbestos
to retain the heat. The whole or parts of the walls of the oven may also be made
double and be packed with asbestos. To allow of lighting the lamp after the same
is in position in the oven, I provide a door in the chimney which door can be opened
to allow of the insertion of a taper or match.
Instead of employing a lamp having a circular wick as shown I may use one
having one or more flat wicks, and instead of placing the lamp in the centre of the
oven it may be at one side thereof, or I may employ two or more lamps.
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. In a cooking stove or oven heated by means of an oil lamp, a floor
separating the oven proper from the chamber or space containing the oil
reservoir of the lamp and provided with an opening through which the lamp may
project and with a slide or removable part substantially as, and for the purposes,
specified.
2. The ring or collar in the roof of the oven enclosing the upper end of the
chimney substantially as, and for the purposes, specified.
3. The oven heated by means of an oil lamp within it, and in combination with
a hot chamber above it into which the products of combustion pass, substantially
as described.
4. An oil cooking stove or oven constructed substantially as described with
reference to the accompanying drawings.
Dated this 14th dow of November 1000
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.