IMPROVEMENTS IN OR CONNECTED WITH FURNACES FOR BURNING GASEOUS PROVISIONAL SPECIFICATION
Year: 1883

page_text: LETTERS PATENT to Jasper Henry Selwyn of Gloucester Crescent, Hyde Park
in the County of Middlesex and Robert Walker of Buckingham Street
Adelphi in the County of Middlesex Engineer for an Invention of
"IMPROVEMENTS IN OR CONNECTED WITH FURNACES FOR BURNING GASEOUS
PROVISIONAL SPECIFICATION left by the said Jasper Henry Selwyn and
Robert Walker at the Office of the Commissioners of Patents on the
9th February 1883.
'
JASPER HENRY SELWYN of Gloucester Crescent Hyde Park in the County of
Middlesex and ROBERT WALKER of Buckingham Street Adelphi in the County
of Middlesex Engineer "IMPROVEMENTS IN OR CONNECTED WITH FURNACES
FOR BURNING GASEOUS FUEL OR OIL AND GASEOUS FUEL
"
Our Invention has reference to furnaces for burning vapourized liquid hydro-
carbons (or hydro-carbons which can be made fluid by the application of a
moderate degree of heat) in conjunction with steam or air or water gas or other
gases (one or more of them.)
In carrying out our Invention we prefer to employ a furnace or combustion
chamber which may be used by itself or be introduced into or placed under any
ordinary boiler or other heating apparatus for raising steam, heating air or fluids,
heating kilns, furnaces, smelters, drying or heating apparatus, baking, roasting,
evaporating or for economically generating heat for any other desired purpose.
The said combustion chamber we prefer to construct as follows; of firebrick,
fireclay or other material capable of resisting fusion at high temperatures with a
double sole or bottom in which there are numerous small nipples or holes
constituting gas jets communicating with larger apertures through which air or
hydro-carbon gas is introduced which gas may or may not be generated on the
spot or the combustion chamber may be furnished with a burner or burners with
asbestos wicks for burning oil in the combustion chamber-The said combustion
chamber has the usual or any desired apertures for the transmission of the heat

page_text: generated in it-An injector or injectors project a spray of liquid fuel.impregnated
with air or steam or water gas or other gases (one or more of them) into the
combustion chamber where the gas jets have already been lighted-The spray of
hydro-carbon fuel impinges on a fireclay block or blocks on which a glowing crater
of pure carbon is speedily formed. In the presence of this deposited carbon as
soon as the temperature has been sufficiently raised in the combustion chamber the
hydrogen of the steam used for injection commences to burn and the most perfect
and economical combustion of all the carbon and hydrogen introduced ensues and
is kept up at the will of the operator. In some cases for example in glass or other
kilns where there is no boiler, that which would otherwise be waste heat is utilised
by providing a tubulous arrangement in the uptake or main flue for the generation
of the steam used to spray in the liquid fuel and as the escaping gases have a very
high temperature even where economy is studied closely a considerable saving may
thus be obtained since with these furnaces no other artificial draught is required
than that which suffices to take off the carbonic acid which is the result of the
combustion together with any other deleterious gases or products due to the special
furnace work
In order to avoid all the danger of gas explosions and also to start the furnace
with facility and rapidity we may employ oil or a vessel in which compressed-air
or gas or both are stored. By these means a constant flame may be kept up in the
combustion chamber or furnace-This vessel is also provided with a connection to
the injector nozzles by opening which communications the compressed air or gas
passes as a jet or as jets from the injector nozzles and produces the required spraying
of the hydro-carbon fuel.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Jasper Henry Selwyn and Robert Walker in the Great Seal
Patent Office on the 9th August 1883.
JASPER HENRY SELWYN of Gloucester Crescent Hyde Park in the County of
Middlesex and ROBERT WALKER of Buckingham Street Adelphi in the County
of Middlesex Engineer
"IMPROVEMENTS IN OR CONNECTED WITH FURNACES
FOR BURNING GASEOUS FUEL OR OIL AND GASEOUS FUEL
"
Our said Invention has reference to furnaces for burning vapourized liquid
hydro-carbons (or hydro-carbons which can be made fluid by the application of a
moderate degree of heat) in conjunction with steam or air or water gas or other gas
or gases.
In carrying out our Invention we may employ a furnace or combustion chamber
either by itself or introduced into or placed under any ordinary boiler or other
heating apparatus for raising steam heating air or fluids beating kilns furnaces
smelters drying or heating apparatus for baking roasting evaporating or for
economically generating heat for any other desired purpose.
And in order that our said Invention may be fully understood we shall proceed
more particularly to describe the same and for that purpose shall refer to the
several figures on the annexed Sheet of drawings the same letters of reference
indicating corresponding parts in all the figures.
Figure 1 is a longitudinal Section of a furnace or combustion chamber illustrating
one mode of carrying out our Invention and Figure 2 is a similar section of a
modified construction of furnace or combustion chamber illustrating another mode
of carrying out our Invention.
Referring to figure 1, A is the combustion chamber which we prefer to construct
in segments in order to provide for contraction and expansion and it may be made
of fire brick fire clay or other material capable of resisting fusion at high
temperatures and by preference with a double sole or hollow bottom B in which
there are numerous small passages or nipples a, constituting gas jets opening into
the combustion chamber and communicating with larger apertures or passages b,
through which air or hydro-carbon gas or water gas (which gas may be made on
the spot) is introduced and caused to enter the nipples a where it is ignited.
The combustion chamber is provided with apertures C, through which the heat
generated passes to beneath the boiler or to the place where the heat is to be
utilized-Liquid hydro-carbon fuel impregnated with air or steam or other gas or
gases is projected by means of an injector or injectors D into the combustion
chamber where the gas jets at the nipples a may have already been lighted.
The spray or jets of fuel as they issue from the injectors D impinge on a fire
clay block E, on which a glowing crater of pure carbon is speedily formed and the
liquid fuel is disintegrated, atomized or broken up into very fine particles and its
combustion thereby facilitated. In the presence of this deposited carbon, (so soon
as the temperature has been sufficiently raised in the combustion chamber,) the
hydrogen of the Steam used for injecting the liquid fuel commences to burn and
the most perfect and economical combustion of the carbon and Hydrogen introduced
ensues and may be kept up at the will of the operator. In some cases, for example,
in Glass or other kilns where there is no boiler that which would otherwise be
waste heat may be utilised for heating an arrangement of tubes placed in the

page_text: =
up-take or main flue for the generation of the steam employed to project the liquid
fuel through the injector into the combustion chamber and as the escaping gases
have a very high temperature a considerable saving is obtained, since with furnaces
constructed according to our Invention, no other artificial draught is required than
is sufficient to take off the carbonic acid resulting from the combustion and other
deletereous gases or products due to the special furnace work. In the modification
illustrated by figure 2 instead of conducting combustible gas to the nipples a from
the exterior as described with reference to figure 1, the gas is generated in the
hollow bottom of the furnace itself for which purpose a number of tubes 6 are
arranged in the hollow bottom which tubes are provided with slots or burners a
fitted with asbestos wicks capable of being raised and lowered as desired by the
spindle e or other convenient means. The tubes b are supplied with hydro-carbon
oil from the exterior of the furnace and the asbestos wicks becoming saturated with
the oil forms a number of lamps or burners over the bottom of the furnace which
upon being ignited produce a high degree of heat, or gas in place of liquid may be
supplied to these wicks.
In order to start the furnace with facility and rapidity we sometimes employ a
vessel in which compressed air or gas or gases (one or more) are stored and
another vessel d containing the liquid fuel.
These vessels are in connection with the injector nozzles by the pipes c¹ d'
provided with cocks c² da by opening which cocks the compressed air or gas causes
the liquid fuel from the vessel d to be projected into the combustion chamber A
and produce the required spraying of the hydro-carbon fuel therein and thereby
keep up a constant Dame in the furnace or combustion chamber, the heat therefrom
passing through the opening C to be employed for heating air or fluids generating
steam or for any other purpose for which it may be required.
Having now described and particularly ascertained the nature of our said
Invention and the manner in which the same is or may be used or carried into
effect we would observe in conclusion that what we consider to be novel and
original and therefore claim as the Invention secured to us by the herein before in
part recited Letters Patent is :-
First, The arrangements and combinations of parts constituting the furnace for
burning gaseous fuel or vaporised hydro-carbon or oil and gaseous fuel or the like
substantially as herein before described under modifications with reference to the
accompanying drawings.
Second, In furnaces or apparatus for burning gaseous fuel or vaporized
hydro-carbon in conjunction with air or steam or water gas or other gases or a
combination of oil and gaseous fuel or the like, the employment of a combustion
chamber of fire-clay or other like refractory material and having an injector or
injectors for the introduction of the said fuel and a slab or surface for its
impingement and also a number of nipples burners or holes at which air is
admitted or hydro-carbon or other liquid or gaseous fuel or water gas is
burned substantially as hereinbefore described with reference to the accompanying
drawings.
Third, In combination with an ordinary boiler or other furnace the employment
of a combustion chamber of fire clay or other like refractory material placed in
the ordinary furnace and provided with means for burning gaseous or liquid fuel
or the like substantially as hereinbefore described.
Fourth, In furnaces or apparatus for burning gaseous or liquid fuel or the like
providing the combustion chamber with means for injecting liquid or gaseous fuel t
in combination with asbestos wicks or burners for burning liquid or gaseous fuel
or water gas in the said combustion chamber substantially as hereinbefore
described.
Fifth, In combination with furnaces or apparatus for burning liquid hydro-
carbon or like fuel the employment of a vessel containing compressed air or gas b
or the like so combined or employed with an injector or injectors as that the said

page_text: compressed air or Gas or the like can be employed for forcing in and regulating
and controlling the supply of liquid fuel substantially as herein before described and
illustrated in figure 2 of the accompanying drawings.
In witness whereof I the said Robert Walker on behalf of myself and the said
Jasper Henry Selwyn have to this our Specification set my hand and seal this
8th day of August One thousand eight hundred and eighty three.
ROBERT WALKER, (L.S.)