IMPROVEMENTS IN OR CONNECTED WITH THE CONSTRUCTION OF FURNACES AND FLUES, AND IN THE MEANS OF CONSUMING SMOKE AND ECONOMIZING FUEL
Year: 1880

page_text: LETTERS PATENT to Thomas Nutt, of Bromley by Bow, in the County of
Middlesex, Builder, for an Invention of "IMPROVEMENTS IN OR CONNECTED
WITH THE CONSTRUCTION OF FURNACES AND FLUES, AND IN THE MEANS OF
CONSUMING SMOKE AND ECONOMIZING FUEL."
PROVISIONAL SPECIFICATION left by the said Thomas Nutt at the Office of
the Commissioners of Patents on the 15th January 1880.
THOMAS NUTT, of Bromley by Bow, in the County of Middlesex, Builder.
"IMPROVEMENTS IN OR CONNECTED WITH THE CONSTRUCTION OF FURNACES AND
FLUES, AND IN THE MEANS OF CONSUMING SMOKE AND ECONOMIZING FUEL."
This Invention is designed for the more perfect consumption of smoke in furnaces
of steam boilers, brewers' coppers, and other furnaces, and for the economizing of
the fuel used therein. For this purpose in place of the ordinary bridge at the back
of the fire, according to this Invention I place a perforated bridge blocking up the
whole of the flue, and only allowing the flame to pass through a series of openings
in that part of the flue which in ordinary furnaces would be the space above the
bridge. I also erect a second bridge at a given distance from the first, according
to the length of the flue; this second bridge is solid at the top, but in lower part
(say, to reach about half way up) place a tank, arched by preference at the
bottom, to allow the flame or smoke to pass underneath. This tank is kept
supplied with water to a certain level (which may be regulated by a ball cock
in a supply cistern at the outside of the boiler) leaving a steam space at the top.
From this steam space I take a pipe and connect the same with a semicircular
pipe placed just above the arched opening, with small holes in the under side for
the purpose of throwing jets of steam on to the smoke as it passes under. I erect
a third bridge also at a given distance according to length of flue; this bridge is
precisely similar to the first bridge at the back of the fire having the openings
towards the top. These bridges are formed of fire bricks, or of fire brick lump
made specially for this purpose, and by the heating thereof, combined with the jets
of steam playing on to the smoke as it passes along the flue, effectually consumes
the carbon, thereby causing a great saving in the quantity of fuel consumed. I do
not intend to limit myself to the number of bridges before stated as this number
may be varied.

page_text: herein described, they should be arranged similar to that last described, viz., with
the perforations in the lower part.
The action is as follows:-
The smoke and fumes from the furnace first come in contact with the bridge a,
then pass through the perforations b, under the tank d, and through the steam
issuing from the semicircular pipe g in the direction of the arrow's flight. I thus
consume the smoke and effect a considerable saving in fuel.
Having thus described the nature and effect of my said Invention, and the
means for carrying the same into practical effect, I would remark in conclusion
what I claim as my Invention and desire to secure by the hereinbefore in part
recited Letters Patent is,
First. The perforations b in the bridges or diaphragms, substantially as and for
the purposes set forth.
Second. The steam tank d in combination with the pipes e, f, g, circulating
pipes i, k, and tank h, all substantially as and for the purposes set forth.
In witness whereof, I, the said Thomas Nutt, have hereunto set my hand
and seal, this Fourteenth day of July, in the year of our Lord One thousand
eight hundred and eighty.
Madrid
IMזו
THOMAS NUTT. (L.S.)