IMPROVEMENTS IN AN APPARATUS FOR SAVING, CONSUMING, AND UTILIZING GASES FROM BLAST AND OTHER FUrnaces, COKING AND OTHER OVENS
Year: 1873

page_text: LETTERS PATENT to Samuel Wagstaff Smith, of 30, Maida Vale,
London, for the Invention of "IMPROVEMENTS IN AN APPARATUS FOR
SAVING, CONSUMING, AND UTILIZING GASES FROM BLAST AND OTHER FUrnaces,
COKING AND OTHER OVENS."
Sealed the 14th October 1873, and dated the 24th April 1873.
PROVISIONAL SPECIFICATION left by the said Samuel Wagstaff Smith
at the Office of the Commissioners of Patents, with his Petition, on
the 24th April 1873.
I, SAMUEL WAGSTAFF SMITH, of 30, Maida Vale, London, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN AN APPA-
RATUS FOR SAVING, CONSUMING, AND UTILIZING GASES FROM BLAST AND OTHER
FURNACES, COKING AND OTHER OVENS," to be as follows:-
The apparatus for conducting the gases from the place they are
produced to the furnace or point of combustion is constructed on the
principle of Giffard's injector, or the steam jet when used for producing
drafts in locomotive and other chimneys.

page_text: In my improvement the blast of air being under pressure, and as it
escapes from its nozzle will draw with it into the vortex caused by such
escape the gases contained in another pipe surrounding or within it and
leading into the furnace, and such pipe terminating at or near the same
outlet of the blast, either concentrically or otherwise, but so that the
gases shall be acted on by the pressure of the blast, and driven or drawn
out with it on the well-known principle of Giffard's injector.
In applying the Invention to utilizing the waste gases of iron smelting
furnaces the two nozzles, one surrounding the other, may terminate
near the end of the water tweer, as now used, and by this plan the air
blast and waste gases will be driven into the body of the furnace and
there consumed, saving a proportionate quantity of fuel, and thereby
increasing the temperature.
One method of applying my improvement. to blast furnaces is to
provide it with an opening at its side near the top where the gases
accumulate, and communicate this opening with a pipe for conveying
the gases to the furnace or locality for burning them.
The gas and
blast pipes are made to communicate with each other near the furnace,.
and the gases are drawn and forced into the furnace by the blast in the
manner before stated.
The
The improvement is applicable to coking, ovens by communicating
the gas pipe with any suitable part of the oven for drawing off the gases
generated therein by the action of the blast, and thereby forcing the
gases into the furnace or wherever required for burning or use.
end of the gas pipe or tweer where the blast and gases meet will be
made of some known suitable substance to stand a high temperature, or
the tweer may be composed of a hollow casing of metal through which a
current of water is circulated to prevent it burning or overheating. The
end of the gas pipe or tweer in the blast pipe will be constructed for
adjusting longitudinally by a lever and rod, or screw and wheel, for
increasing or diminishing the flow of gas into the furnace by the action
of the blast.
The event form of the annaratus and the sizes of the gas and blast

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Samuel Wagstaff Smith in the Great Seal Patont
Office on the 21st October 1873.
+
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SAMUEL
WAGSTAFF SMITH, of 30, Maida Vale, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of April, in the year
of our Lord One thousand eight hundred and seventy-three, in the
thirty-sixth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Samuel Wagstaff Smith,
Her special licence that me, the said Samuel Wagstaff Smith, my
executors, administrators, and assigns, or such others as I, the said
Samuel Wagstaff Smith, my executors, administrators, and assigns
should at any time agree with, and no others, from time to time and
at all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United King-
dom of Great Britain and Ireland, the Channel Islands, and Isle of Man,
an Invention for "IMPROVEMENTS IN AN APPARATUS FOR SAVING, Consuming,
AND UTILISING. GASES FROM BLAST AND OTHER FURNACES, COKING AND OTHER
OVENS," upon the condition (amongst others) that I, the said Samuel
Wagstaff Smith, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same to be
filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Samuel Wagstaff Smith, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement:-
The apparatus for conducting the gases from the place they are
produced to the furnace or point of combustion is constructed on the
principle of the steam jet when used for inducting a draft in locomotive
and other chimneys.
In my improvement the blast of air used is under pressure, and as it
escapes from its nozzle will draw or induct with it into the vortex

page_text: caused by such escape the gases contained in another pipe surrounding
or within it leading into the furnace or place of combustion, and such
pipe terminating at or near the same outlet of the blast, either con-
centrically or otherwise, but so that the gases shall be acted on by the
pressure of the blast, and driven, drawn, or inducted out by it into the 5
furnace.
In applying the Invention to utilizing waste gases of iron smelting
furnaces the two nozzles, onc surrounding the other, may terminate
near the end of the water tweer as now used, and by this plan the air
blast and the waste gases will be driven into the body of the furnace 1
and there consumed, saving a proportionate quantity of fuel, and thereby
increasing the temperature.
One method of applying my improvement to blast furnaces is to
provide it with an opening or openings at its side near the top where
the gases accumulate, and communicate these openings with pipes for 1
conveying the gases to the locality where they are consumed. The gas
and blast the pipes are made to communicate with each other near the
tweeres, and the gases are drawn, forced, or inducted into the furnace by
the blast in the manner before stated.
The improvement is applicable to cokeing ovens by communicating 2
the gas pipe with any suitable part of the oven, and drawing off the
gases generated therein by the action of the blast, and thereby forcing
the gases into the furnace, or wherever required for burning or use.
The end of the gas pipe or tweer where the blast and
gases meet may be
made of some known suitable substance to stand a high temperature, or 2
the tweer may be composed of a hollow casing of metal through which a
current of water is circulated to prevent it burning or overheating. The
end of the gas pipe or tweer in the blast pipe will be constructed for
adjusting longitudinally by a lever and rod, or screw and wheel for
increasing or diminishing the flow of gas into the furnace by the action 3
of the blast.
The exact form of the apparatus and the sizes of the gas and blast
nines will depend upon the position and uses to which the improvement

page_text: Fig. 1 represents an elevation of an ordinary blast furnace, with the
lower portion of it shown in section; Fig. 2 represents a coke oven,
showing the improvement applied to a steam boiler; and Fig. 3 is an
enlarged view of that portion of the air and gas pipes applied to the
furnace or point of combustion.
A represents the furnace, and B, B, the gas pipes. One, two, or more
of these pipes may be used for conducting the gases from any point
near the top of the stack into the furnace, as represented in Fig. 1.
The longitudinal portion of the gas pipes B entering the furnace are
provided with air-supplying pipes C, C. These pipes are placed in the
centre of the gas pipes B, and made to adjust longitudinally by sliding
on the rest a, as shown in Fig. 3, or by any other means herein-before
mentioned for increasing or diminishing the inducting force of the blast
on the gases in the pipes B, B, when being forced into the furnace.
The air supplied to the furnace through the pipes C, C, is under
pressureand supplied by an ordinary fan or blowing cylinder in the usual
manner. The shape of the ends of the pipes B and C, or nozzles where
the air and gases are made to unite, may be made plain by tapering
towards their ends in the usual way, as represented in Fig. 1 at f, or
have a trumpet-mouth shape, as represented at d, d, in Fig. 3. The
latter form in some cases will be more likely to act on or induct and
force the gases into the furnace; however, practice will determine the
best form of nozzle to be used under differing circumstances. J, J, is an
ordinary water tweer surrounding the end of the gas pipes, as represented
in Fig. 3, to protect them from the heat.
As before stated, the gases from cokeing ovens or other sources of
generating them where they are not too much consumed, may be
utilized by my improvement for any heating purpose, for instance, under
steam boilers and puddling furnaces, with or without furnaces of their
own.
In Fig. 2 the apparatus is represented applied to a coke oven D,
drawing and forcing the gases therefrom through a tubular boiler G,
without a furnace of its own for burning fuel. The gases drawn from
the oven under such circumstances are supposed to be sufficiently heated
to ignite immediately when they come in contact, and unite with the jet
of air at the end of the nozzle. The direction of the motion of the gases
and air is indicated by the arrows marked on the Drawings.

page_text: Having described the nature of my improvement, and manner of
applying it to use, I will now state that what I claim as my Invention
and desire to secure by Letters Patent is, the use of an inducting current
or currents of air under pressure for drawing or forcing gases from iron
furnaces, coke ovens, or other sources where they are generated, for
utilizing and consuming such gases for heating purposes, in the manner
and for the purpose herein-before stated and represented.
.
In witness whereof, I, the said Samuel Wagstaff Smith, have
hereunto set my hand and seal, this Eighteenth day of October,
in the year of our Lord One thousand eight hundred and seventy-
three.