IMPROVEMENTS IN PETROLEUM COOKING APPARATUS
Year: 1885

page_text: I, HERBERT JOHN HADDAN, of 67, Strand, in the City of Westminster, Civil
Engineer, do hereby declare the nature of said invention for IMPROVEMENTS IN
PETROLEUM COOKING APPARATUS, a communication to me from abroad by Richard
Richter, Chemist, of Katharinenstrasse, Leipzig, in the kingdom of Saxony, to be
as follows:-
This invention relates to cooking apparatus heated by petroleum and other
mineral oil.
The principal feature of novelty consists in one or more discharge pipes or funnels
arranged sideways, and which permit the use of burners hitherto only successfully
applied for lighting purposes.
The apparatus is preferably provided with two burners mounted on an oil
receptacle made entirely of glass. Instead of fastening the burners to the
receptacle by means of the usual screw threads, each burner is provided with a
smooth plug or collar which fits into the ring forming the mouth of the receptacle.
The burners are secured by means of any suitable device, for instance by two
opposite hooks mounted on the oil receptacle and which seize over the axle of the
key serving to regulate the position of the wick.
According to size and use of the lamp, the apparatus is provided with one or
more funnels or discharge tubes for the products of combustion, said tubes having
preferably a diameter of about 6 centimetres and a height of about 50 centimetres,
and which extend from the side of the apparatus, immediately under the cover or
top plate which serves to receive and hold the cooking vessels. The inlet of each
discharge pipe is situated above the burners, and right or left of the same.
If the stove is provided with two or more discharge pipes, they are arranged so
as to terminate in a common funnel or outlet.
In front of the lower aperture of the discharge tube there is a fire-bridge,
preferably made of sheet iron, and the size of which corresponds to the size of the
lower aperture.
This fire-bridge is fixed immediately below the inlet of the
discharge tube and about 13 centimetre from the saine and so as to cover the said
inlet for about of its diameter. In the case of two flames, the outlet of the
gases and the fire-bridge is situated sideways and at equal distances from the two
flames, so that the products of combustion escape uniformly from the two flames,
while the air supply is regulated accordingly.

page_text: Improvements in Petroleum Cooking Apparatus.
I, HERBERT JOHN HADDAN, of 67 Strand in the County of Middlesex Civil
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by Richard Richter of Katharinenstrasse, Leipzig, in the kingdom of
Saxony, Chemist, and in what manner the same is to be performed, to be par-
ticularly described and ascertained in and by the following statement:-
The improvements consist essentially in the employment of laterally arranged
discharge flues which render applicable a type of burners, which hitherto could
only be used advantageously for lighting purposes. The burners are fixed to oil
receptacles made completely of glass, as in the case of oil lamps, by means of
projecting rings or flanges and petroleum tight cement. Instead of the usual screw
threads, the burners are provided with smooth plugs or studs fitting exactly into
the opening of the said rings. Hooks or similar devices serve to secure the burners
in their position. This construction not only ensures easy handling of the wicks
etc., but also protection from danger, as oil receptacles, made entirely of glass,
have the important advantage of being bad conductors of heat, as compared with
the oil receptacles hitherto used, which are provided above with metal covers and
therefore consist only partly of glass. Besides, the improved oil receptacles have
the advantage of greater cleanliness.
In the accompanying drawings Fig. 1 is a vertical section of an improved
petroleum cooking apparatus, while Figs. 2 and 3 represent details.
According to the size and use of the apparatus, a discharge flue a is applied to
the side of the stand or vessel holder, or several channels a (of about 6 c/m diameter
and about 50 cm height) are placed opposite each other, in such a manner that the
products of combustion must escape through the one or more flues. Therefore the
vessel holder or stand e, forming a complete ring, is completely closed at the top.
Several discharge flues, arranged for instance opposite each other, may be made to
terminate at an obtuse angle in a common channel for the purpose of complete
ejection of the products of combustion. Before the lower opening 6 of a flue is
situated a fire bridge d, made of a simple strip of sheet iron. The size of this fire
bridge depends on the size of the lower opening; it has a distance of about 1 cm.
from the opening b and projects over the same to the right and to the left by a few
centimetres; but it covers the opening b only to about of its height. The flue
opening with this fire bridge is placed laterally at equal distances from both
flames; in consequence of this arrangement the heating gases flow away uniformly
from both flames, also the air current to the flames is correspondingly uniform.
In the drawing A is the oil receptacle, a¹ are the glass rings or flanges for the
burners, B are the burners, C is the cover of the stand e, which supports the
cooking vessels and is closed all round except at the entrance to the flue.
The lateral discharge flue has for its object:
1.) Accelerated discharge of the heating gases, consequently a quicker supply of
air to the flames, a favorable mixture of air and oil vapour and, as no low products
of oxidation of the hydro-carbons are formed, absence of smell.

page_text: 2.) To bring the boiling or cooking vessels quite close to the flames, whereby
already a considerable increase of heating effect is produced.
3.) Easy manipulation of the boiling or cooking vessels, which can be con-
veniently put on the stove and taken off the same without removing the discharge
flue.
•
4.) A ventilation corresponding to sanitary requirements which may be easily
obtained by connecting the flue with a main flue leading to a chimney.
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.) Cooking apparatus adapted to be heated by mineral oils and having one
or more lateral discharge-flues with fire-bridge, substantially as described and
illustrated and for the purposes set forth.
2.) In cooking apparatus adapted to be heated by mineral oils, an oil receptacle
consisting entirely of glass and provided with burners attached by means of plugs
instead of the ordinary screw-attachment.