Improvement in the Mode and Means of Obtaining Light from Oil Lamps, and Heat from Oil or Gas Stoves.
Year: 1897

page_text: Date of Application, 15th June, 1897
Complete Specification Left, 13th Apr., 1898-Accepted, 20th May, 1898
Improvement in the Mode and Means of Obtaining Light from Oil
Lamps, and Heat from Oil or Gas Stoves.
I, HENRY DE STEDINGK, of 19A, Coleman Street, City of London, Gentleman, do
hereby declare the nature of this invention to be as follows:-
This invention relates to oil lamp lighting, and heating by stoves, and consists:-
(A). Of apparatus adapted to any form of oil lamp for giving light to effect the
heating of the air supplied for the combustion of the oil by utilising the heat itself
of the burning oil and gas therefrom and thereby to effect by definite adjustment of
the hot air supply, a much brighter, whiter, and more vivid light with a smaller
consumption of oil than from any other existing form of oil lamp burner.
(B) Of an improved method for the breaking up or attenuation of the gas given
off, so as to render it more highly incandescent, and to subject it at the point of
ignition to the action of an exactly proportioned and controlled current of highly
heated air, and in means for effecting the said purpose.
The flame from the lamp burner is enclosed in a chimney of glass or any other
suitable material, an outer chimney, globe, or cover of glass or other suitable
material is then applied about the inner chimney. leaving an annular or other space
between the two chimneys or covers for the passage down it of the air supply to the
flame, so that the air is exposed on its travel to the flame in a thin film to the
heated outer surface of the inner chimney.
The bottom of the outer chimney or cover is closed airtight, and a means of
access for the air is provided from the outer annulus or space between the two
chimneys or covers to the bottom of the inner chimney and thus to the flame where
in a highly heated condition it meets the issuing gas and produces a white vivid
light with comparatively small consumption of oil.
The base of the outer chimney may be scaled by the shape being moulded in with
screwed attachment to the burner or lamp, or by a separate plate, cup, or saucer,
sealed or cemented to the outer chimney, or merely supporting said chimney and
screwed or fitted to the burner or other convenient part of the lamp.
The inner and outer chimneys may be of any shape and made to suit the flame
from the burner, and the size and length of either chimney is made in accordance
with the requirements to give most effective and vivid light.
A small tube may be introduced from the exterior air into the closed bottom of
the two chimneys, the said tube being brought into the interior of the flame to
admit air therethrough.
As a further means of regulating the air supply to the flame, a regulating valve
may be applied between the outer and inner chambers.
The part of the burner within the chimneys may be protected from heat by an
air space, or by a non-conducting packing, such as asbestos.
The burner as above enclosed may be lighted from the top, or the lower disc or
cup may be made movable so as to permit the insertion of a light, or an opening
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page_text: may be provided with a sliding or spring-closed shutter in the said disc or cup for
the same purpose.
In order to split up the volume of gas issuing from the burner which shall be
circular or otherwise, orifices are constructed at a considerable distance from each
other, or to effect this purpose, a button or spreader may be used, or a ring with a
fine slit adapted to fit over the burner, or a device having inner and outer cones, by
means of which two or more currents of air are made to impinge on the flame, or
a small spreader arranged over each aperture of the burner adapted to spread the
flame.
When the said attenuated or divided body of escaping gas is exposed to an
external or internal high velocity current of heated air, the divided or attenuated
bodies of gas will, by induction, be still further extended out so as to approach one
another, filling up intervening blank spaces and becoming still more attenuated and
filmy under such extending or spreading action.
A rapid current of heated air is introduced to such extenuated or divided gas jet
by the external air passing downwards through the space between the internal and
external chimneys or covers in contact with the surface of the highly heated inner
chimney or cover and passes to the burner from underneath in an ascending current
of high velocity both within and without the flame.
The volume of the said air current may be nicely regulated and controlled by the
proportion of the relative diameters or dimensions of the said chimneys or covers,
and the rapidity may be controlled by the relative heights of the internal and
external chimneys to one another, which may be adjusted in any suitable manner.
Dated this 15th day of June 1897.
1
H. GARDNER,
Patent Agent, 166, Fleet Street, London
Agent for the said Henry de Stedingk.
Improvement in the Mode and Means of Obtaining Light from Oil
Lamps, and Heat from Oil or Gas Stoves.
I, HENRY DE STEDINGK, of 19A, Coleman Street, City of London, Gentleman, 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 oil lamp lighting and heating by stoves, and consists: —
(A). Of apparatus adapted to any form of oil lamp for giving light to effect the
heating of the air supplied for the combustion of the oil by utilising the heat itself
of the burning oil and gas therefrom and thereby to effect by definite adjustment of
the hot air supply a much brighter, whiter, and more vivid light with a smaller
consumption of oil than from any other existing form of oil lamp burner; and
(B). Of an improved method for the breaking up or attenuation of the gas given
off so as to render it more highly incandescent, and to subject it at the point of
ignition to the action of an exactly proportioned and controlled current of highly
heated air; and in means for effecting the said purpose.
The flame from the lamp burner is enclosed in a chimney of glass or any other
suitable material, an outer chimney, globe, or cover of glass or other suitable
material is then applied about the inner chimney, leaving an annular or other space
between the two chimneys or covers for the passage down it of the air supply to the
flame, so that the air is exposed on its travel to the flame in a thin film, to the
heated outer surface of the inner chimney.

page_text: The bottom of the outer chimney or cover is closed airtight and a means of
access for the air is provided from the outer annulus or space between the two
chimneys or covers to the bottom of the inner chimney and thus to the flame where
in a highly heated condition it meets the issuing gas and produces a white vivid
light with comparatively small consumption of oil.
The base of the outer chimney may be sealed by the shape being moulded in with
screwed attachment to the burner or lamp, or by a separate plate, cup, or saucer,
sealed or cemented to the outer chimney, or merely supporting said chimney and
screwed or fitted to the burner or other convenient part of the lamp.
The inner and outer chimneys may be of any shape and made to suit the flame
from the burner, and the size and length of either chimney is made in accordance
with the requirements to give most effective and vivid light.
A small tube may be introduced from the exterior air into the closed bottom of
the two chimneys, the said tube being brought into the interior of the flame to
admit air therethrough.
As a further means of regulating the air supply to the flame, a regulating valve
may be applied between the outer and inner chambers.
The part of the burner within the chimneys may be protected from heat by an
air space, or by a non-conducting packing, such as asbestos.
The burner as above enclosed may be lighted from the top, or the lower disc or
cup may be made movable so as to permit the insertion of a light, or an opening
may be provided with a sliding or spring-closed shutter in the said disc or cup for
the same purpose.
In order to split up the volume of gas issuing from the burner, which shall be
circular or otherwise, orifices are constructed at a considerable distance from each
other, or to effect this purpose, a button or spreader may be used, or a ring with a
fine slit adapted to fit over the burner, or a device having inner and outer cones, by
means of which two or more currents of air are made to impinge on the flame, or
a small spreader arranged over each aperture of the burner adapted to spread the
flame.
When the said attenuated or divided body of escaping gas is exposed to an
external or internal high velocity current of heated air, the divided or attenuated
bodies of gas will, by induction, be still further extended out so as to approach one
another filling up intervening blank spaces and becoming still more attenuated and
filmy under such extending or spreading action.
A rapid current of heated air is introduced to such attenuated or divided gas jet
by the external air passing downwards through the space between the internal and
external chimneys or covers in contact with the surface of the highly heated inner
chimney or cover and passes to the burner from underneath in an ascending current
of high velocity both within and without the flame.
The volume of the said air current may be nicely regulated and controlled by the
proportion of the relative diameters or dimensions of the said chimneys or covers,
and the rapidity may be controlled by the relative heights of the internal and
external chimneys to one another, which may be adjusted in any suitable manner.
My invention will be clearly understood by reference to the annexed drawing
which shows a section of an oil lamp. A body or oil container. B burner ring.
C partition plate with perforations D. E gallery. Fouter and short glass chimney,
or it may be a globe. G inner or long chimney. H annular space between them.
J. valve on partition plate C to cover more or less the perforations 1). J wick tube.
Kinlet for central air supply from nozzle L. M cap tube for flame to impinge against
and be partially thinned by the ring of openings N in the spread out portion or
cone P. Q shutter of opening which when uncovered permits of a match or taper
being inserted to light the wick. R thumb button of wick lifter of the usual kind.
The action is as follows:-Air travelling downwards in the annular space H
between the two chimneys F, G, becomes rarefied and passes through the perfora-
tions D of the otherwise closed partition plate C and returns up between the wick
tube J and the inner chimney G where it meets the flame in a highly heated

page_text: condition and slightly under pressure by reason of the narrowness of the
perforations D as compared with the area of the annular space H and due to the
suction or up-draught created by the flame and also by the height of the inner
chimney G.
The presence of this heated air to the flame enhances its clearness and increases
the brilliancy of the light giving properties therefrom, features still further
increased by the central supply of air from the nozzle L which as it rises up within
the cap tube M, this being in a state of incandescence by the flame impinging on its
exterior and the portion passing through its perforations N, also becomes intensely
heated to feed the interior of the flame with a supply of air of about the same
temperature as that of the flame itself whereby the flame becomes brilliantly white,
the combustion perfect, there being an entire absence of smoke and smut.
When the perforations D in the partition plate C are fully open, the supply of
rarefied air is greater but of less warmth and this increased quantity tends to check
the inflow and up-draught by the nozzle L, so that the flame deadens with a result
the heat becomes greater and the lamp specially adapted for stove and other heating
purposes.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what
I claim is
1. An oil lamp adapted for lighting or for heating as specified, the construction
or arrangement of the several parts being in combination, as represented in the
annexed drawing.
2. In an oil lamp, capable of adaptation for lighting and for heating purposes at
will, the valve I coverable perforations D, air entry K, nozzle L, cap tube M,
perforations N in swelled out edge P, all as described and shown.
The 15th day of April.
H. GARDNER,
Patent Agent, 166, Fleet Street, London
Agent for the said Henry de Stedingk.