Improvements in Apparatus for Burning Vaporized Petroleum and the like for Heating and Illuminating Purposes
Year: 1897

page_text: Date of Application, 11th Dec., 1897-Accepted, 15th Jan., 1898
Improvements in Apparatus for Burning Vaporized Petroleum and
the like for Heating and Illuminating Purposes,
I, DAVID KEMPE, of Nacka, Stockholm, in the Kingdom of Sweden, Mechanical
Engineer, 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:-
In a number of lamps, oil-stoves and similar apparatus a liquid combustible
(usually petroleum) is forced up into a burner where it vaporizes. The pressure
required for this purpose is usually generated by means of a pump or by heating
a volume of air, which acts on the combustible material; the pressure, however,
in these cases always changes, gradually decreasing which is a great disadvantage
especially in illuminating apparatus where the light is produced by means of a
mantle, which is heated to incandescence by the vaporized combustible material.
The same disadvantage is connected with the use of the well-known arrangement
of a compressed-air reservoir communicating with the reservoir containing the
combustible by means of a pipe and a cock for the introduction of the air into
the reservoir, for, even in this case the pressure cannot be kept constant but falls
gradually until the connection between the reservoir is opened by hand for intro-
ducing a fresh quantity of air which for a short time increases the pressure in the
oil-reservoir.
Moreover, the compressed air occupies comparatively large volume and con-
sequently requires a comparatively large reservoir, and if the latter be kept within
reasonable dimensions it will not be large enough to hold a quantity of air
sufficient for any length of time but will require frequent replenishing.
The present invention relates to an arrangement of apparatus of the kind re-
ferred to whereby the internal pressure can be kept so constant as to make the
said apparatus perfectly suitable for illuminating purposes, i.e. capable of main-
taining an even and steady flame, which is an indispensible requirement in au
illuminating-apparatus.
The invention at the same time makes it possible to use pressure-reservoirs of
such small dimensions that they can be located in the base, for instance, of such
an apparatus having the size of an ordinary lamp, and still only require replenishing
once or twice a year.
The invention consists in using as pressure-fluid in the pressure-reservoir carbonic
acid compressed into liquid state and arranging on the pipe connecting the said
reservoir and the oil or fuel-reservoir, in place of an ordinary cock, an auto-
matic valve which, when the pressure in the oil or fuel-reservoir falls below the
normal pressure, opens and lets in a quantity of carbonic acid in the latter reser-
voir, thus quickly restoring the original pressure.
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:
In an apparatus for the combustion of vaporized petroleum or other liquid

page_text: combustible, where the latter is forced up into the burner by means of some gas
under pressure, the combination with the fuel-reservoir of a reservoir for holding
carbonic acid in a liquid state, the said reservoirs being connected by means of a
passage containing a valve that opens automatically, when the pressure falls in
the fuel-reservoir, and thus restores the original pressure in the latter.
Dated this 11th day of December 1897.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.