AN IMPROVEMENT OR IMPROVEMENTS IN SAVING FUEL AND BURNING SMOKE, APPLICABLE TO FURNACES AND STOVES
Year: 1834

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
WITTY, of Hanley, in the County of Stafford, Civil Engineer, send greeting.
WHEREAS His most Excellent Majesty King William the Fourth, by
His Letters Patent, under the Great Seal of Great Britain, bearing date at
Westminster, the Twenty-fifth day of September, in the fifth year of His reign,
did, for Himself, His heirs and successors, give and grant unto me, the said
Richard Witty, His especial licence that I, the said Richard Witty, my exors,
adiiors, and assigns, or such others as I, the said Richard Witty, my exors,
aduiors, and assigns, should at any time agree with, and no others, from time
to time and at all times, during the term of years therein mentioned, should
and lawfully might make, use, exercise, and vend, within England and Wales,
and the Town of Berwick upon Tweed, my Invention of "AN IMPROVEMENT
OR IMPROVEMENTS IN SAVING FUEL AND BURNING SMOKE, APPLICABLE TO FURNACES
AND STOVES;" in which Letters Patent there is contained a proviso obliging
me, the said Richard Witty, by an instrument in writing under my hand and
seal, particularly to describe and ascertain the nature of my Invention, and in
what manner the same is to be performed, and to cause the same to be inrolled
in His Majesty's High Court of Chancery within six calendar months next
and immediately after the date of the said in part recited Letters Patent,
reference being thereto had, will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Richard Witty, do hereby declare that the nature of my Invention, and the
manner in which the same is to be performed, are described and ascertained
by the following descriptions thereof, reference being had to the Drawings
accompanying these Presents, that is to say:-
My Invention of An Improvement or Improvements in Saving Fuel and
Burning Smoak, applicable to Furnaces and Stoves," consists in the adaptation
of certain earthen tubes. to the flue of the furnace of, a boiler, or stove for the
purpose of intercepting the smoke and other vapours before they reach the
chimney, in order to effect a more complete combustion of the fuel and of the
sooty and inflammable matters arising therefrom, which will cause a con-
siderable increased intensity of the heat, and consequently an economization in
the quantity of fuel required to be consumed. One mode which I have found
eligible in adapting these earthen tubes to the furnace of a steam boiler is
shewn in the accompanying Drawings, Figure 1 being a longitudinal section of
the boiler, its furnace, and flues; and Figure 2, a transverse section of the
same. A is the furnace; B, the bridge of the furnace; C, the flue carried
round the boiler in the ordinary way. D represents a number of open tubes
placed longitudinally one upon another on the bridge of the furnace, in direc-
tions leading from the furnace to the flue. These tubes I make of Stourbridge
fire clay, or they may be made of some of the known compounds of plombago,
pumice stone, and other materials which are least liable to be vitrified by heat.
I prefer these tubes to be of cylindrical forms, but do not intend to confine
myself either to that shape or to any particular dimensions. From nine inches
to twenty-four inches in length, and from half an inch to three inches internal
diameter, I have found to answer the purpose; the longer the tube, of course
the larger should be its bore, and the clay or other material may be from one
quarter of an inch to an inch in thickness. The space between the bridge B
and the under parts of the boiler should be nearly, if not quite, filled up by the
tubes D, placed one upon another. The draught from the furnace to the
chimney must, therefore, pass through and between these tubes, which tubes
will, by that means, soon become red hot. The soot and inflammable gases
evolved from the furnace being, by the draught of the chinney, brought in
contact with the heated surfaces of these tubes, the combustible parts will be
immediately consumed, and nothing allowed to pass off into the chimney but
the mere indestructible vapour. As the method of moulding the fire clay and
other materials into tubes, and the subsequent drying and baking of them for
use is well understood, and forms no part of my Invention, I do not consider it
necessary to explain that process; but, in conclusion, I desire it to be understood

page_text: that I claim as my Invention the placing of tubes, or forming of narrow or
contracted channels, of whatever shape, of fire brick or other suitable material
between the furnace and the chimney of a boiler or stove, or other heating
apparatus, for the purpose of intercepting the progress of the smoke and other
combustible matters, in order that by the intense heat of their surfaces the
soot and inflammable materials evolved from the furnace may become con-
sumed, and a saving of fuel be thereby effected.
In witness whereof, I, the said Richard Witty, have hereunto subscribed
my name and affixed my seal, this Twenty-sixth day of January, in the
year of our Lord One thousand eight hundred and thirty-five.
AND BE IT REMEMBERED, that on the Twenty-sixth day of January,
in the year of our Lord 1835, the aforesaid Richard Witty came before our said
Lord the King in His Chancery, and acknowledged the Specification afore-
said, and all and everything therein contained and specified, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Inrolled the Seventh day of February, in the year of our Lord One thou-
sand eight hundred and thirty-five.