Improvements in Incandescent Vapour Lamps.
Year: 1898

page_text: Date of Application, 11th May, 1898-Accepted, 9th July, 1898
COMPLETE SPECIFICATION.
Improvements in Incandescent Vapour Lamps.
I, GEORGE FREDERICK REDFERN, of the Firm of G. F. Redfern & Co., The General
Patent Office, No. 4, South Street, Finsbury, in the County of London, Patent
Agents, do hereby declare the nature of this invention (a communication to me
by VICTOR POSNO and LEON MORRISON, both of 30/1, Kipdorp, Antwerp, in the
Kingdom of Belgium, Lamp Manufacturers,) and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:-
-
This invention has for its object a lamp which itself generates the gas or vapour
it requires for consumption from a suitable combustible liquid, and which is
provided with vaporisers whereby a suitable incandescent mantle can be employed
in conjunction with a Bunsen burner and a direct incandescent light can bo
obtained with lamps using various combustible materials such as petroleum, ben-
zine, spirit, etc.
The chief feature by which this lamp is distinguished from those heretofore
made is that combustible liquid is obtained from a suitable reservoir or container
by a separate wick, the said liquid being then warmed in a chamber by hand
to such an extent that it vaporises, the gas evolved being mixed with air and
ignited in a small Bunsen burner which then heats a second apparatus sufficiently
to vaporise the combustible liquid, the gas evolved being also mixed with air
With this construction a double wick
and conveyed to the incandescent mantle.
arrangement is necessary, that is to say, (1) the wick device which conveys the
liquid converted into gas to the heating flame, and (2) a second wick arrange-
ment (main device) which conveys the liquid to the main feed tube, the said liquid
being vaporised in the above described preliminary heating chamber and then con-
veyed to the Bunsen burner or incandescent mantle.
In the accompanying drawing there is shewn as an example a lamp manufactured
according to the invention; in the said drawing-
Figure 1 is a longitudinal section of the lamp:
Figure 2 is a front view thereof; and
Figures 3 and 4 are two views of the vaporiser.
The operation of the lamp will be understood from the following description:
The combustible liquid, such as petroleum, spirit, etc., in the reservoir G is
first sucked up through the wick contained in the tube C. The tube C, or C¹
and C, is then heated so that the liquid in the tube is vaporised and is forced
by the pressure obtained in the said tube to the outlet therefrom. The said outlet
is so formed that the vaporised and combustible liquid mixes with air and the
mixture is then ignited by the heat developed as above described so that a flame
issues from the Bunsen burner H. This ignition or vaporising-flame heats, as
can be clearly seen by reference to Figure 3, an extension B of the tube A which
is provided with a second or main wick, so that the liquid in the said tube A is
vaporised and passes upwards, that is to say, to the nozzle of the Bunsen burner J
through which it issues. With this arrangement, therefore, the gas is mixed

page_text: with air and can be ignited at the burner K so that the mantle which is suspended
above the burner is rendered incandescent in the usual manner.
The construction of the apparatus will be understood from the following descrip-
tion:-
The combustible liquid in the reservoir G is sucked up by means of a wick
which extends into the vaporiser C. On the left side of the container there is
provided a cylinder, the screw cover or cap of which carries an ignition plug which
dips into the liquid. If this cap or cover be unscrewed and the plug ignited and
held against the bent tube C, 0, the fluid sucked up into the tube is vaporised
and flows in the above described manner through the Bunsen burner H for ignition.
The second wick, which is much larger, sucks the liquid into the tube A which
conveys the liquid or gas through the Bunsen burner J into the neighbourhood of
the mantle K. To prevent the radiation of the heat a perforated jacket or cover D
is arranged around the vaporiser and around the main gas tube A, B. To prevent
the radiation of heat to the interior of the reservoir or downwards the mantle or
cover is secured by a plate or ring made of a material which does not conduct
heat. With this arrangement, by turning the ring E the upper part of the gas
burner can be unscrewed from the reservoir G without any risk of an explosion.
Figures 3 and 4 illustrate the vaporiser, the construction of which is easily
understood from these figures.
To enable the preliminary heating of the vaporiser C, C¹, C and H to be con-
veniently effected by the ignition plug F a square opening N is provided in the
perforated mantle or cover.
The above description of lamp can be employed with all kinds of combustible
liquids and is especially applicable for household purposes.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what 1
claim is:
1. An incandescent vapour lamp for petroleum, spirit and similar combustible
liquids, wherein a suitable vaporiser C, C, C3 heats a tube A, B in such a manner
that the liquid contained therein is vaporised, the vapour evolved being mixed
with air and passed through a Bunsen burner J, into the immediate neighbourhood
of the mantle, for ignition, a wick in the tube A operating as a capillary tube
and constantly sucking up the liquid from the reservoir, substantially as herein-
before described.
2. In an incandescent vapour lamp of the kind described in Claim 1 a vaporiser
comprising a bent tube C, C, C which is provided with a Bunsen burner I at
its outlet and which by means of a suitable flame, vaporises the liquid contained
in the said tube, the vapour evolved being then ignited at the Bunsen burner H
so that the flame thereby formed can vaporize the liquid contained in the tube A,
substantially as hereinbefore described.
3. The combination and arrangement of parts forming the improved incan-
descent vapour lamp hereinbefore described and illustrated in the accompanying
drawing.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.