IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACER
Year: 1879

page_text: LETTERS PATENT to James Young, of Bunker Hill Fence Houses, in the County
of Durham, for the Invention of "IMPROVEMENTS IN STEAM BOILER AND
OTHER FURNACER"
Sealed the 15th July 1879, and dated the 18th January 1879.
PROVISIONAL SPECIFICATION left by the said James Young at the Office of
the Commissioners of Patents on the 18th January 1879.
JAMES YOUNG, of Bunker Hill Fence Houses, in the County of Durham.
"IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES."
This Invention relates to improvements in the arrangement and construction of
steam boiler and other furnaces, particularly with reference to the arrangement of
the flues, bridges, and fire grate for admitting heated air thereto to facilitate com-
bustion and prevent smoke.
For this purpose the ordinary fire door is dispensed with and the fuel is fed
through suitable openings which are arched over in front of the furnace above tho
dead plate and fire bars on to which it falls, until the feed openings are blocked
with the banked up fuel which is supported by an iron plate or shelf in front.
Below the feed openings holes are arranged for introducing stoking irons to
facilitate the working of the fire when required, or when fresh fuel is introduced.
Above the feed openings a flue is formed along the upper part of the front of
the furnace, this flue communicates by side flues with the ash pit from which air is
drawn to supply the furnace.
The air from the ash pit passes up the sido flues into the flue in front of the
furnace, from which it passes through a number of small tubes or passages into the
upper part of the furnace in finely divided streams, so as to mix readily with the
Binoke and gases in the chamber of the furnace before passing over the bridge.
I find it advantageous to form a number of combustion chambers in the bottom
flue by placing a series of bridges therein at suitable distances apart, such bridges
serving to prevent the too rapid escape of the gases and heated products of com-
bustion.
My Invention is applicable to various forms of steam boiler and other furnaces.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Young in the Great Seal Patent Office on the 17th July
1879.
JAMES YOUNG, of Bunker Hill Fence Houses, in the County of Durham.
"IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES."
My Invention relates to improvements in the arrangement and construction of
steam boiler and other furnaces, particularly with reference to the arrangement of
the flues, bridges, and fire grate, for admitting heated air thereto to facilitate com-
bustion and prevent smoke.
And in order that my Invention may be clearly understood and readily carried
into practice, I will proceed to describe the Drawings hereto annexed, which show
a longitudinal section and an end view of a steam boiler furnace arranged and
constructed in accordance with my improvements.
In this arrangement the ordinary fire door is dispensed with, stopper holes being
provided instead, the fuel being fed through the openings a, a, which are arched
over in front of the furnace, the feed openings being considerably above the dead
plate and fire-bars b on to which the fuel falls, until the feed openings a, a, are
blocked with the banked up fuel which is supported by an iron plate or shelf a¹ in
front.
The fuel being thus supported on the shelf or plate a' in front is thus partly
coked before being pushed forward by a rake into the furnaco, and by this means
any sudden rush of cold air upon the boiler is avoided (the effect of which is well
known), nor is the attendant exposed to any excessive heat. The grate area is
also reduced nearly one half which enables one attendant to do the work of
two.
Below the feed openings a, a, holes c, c, are arranged for introducing stoking
irons to facilitate the working of the fire when required or when fresh fuel is
introduced.
Above the feed openings a, a, a flue d is formed along the upper part of the
front of the furnace; this fluo communicates by side flues d', d¹, with the ash pit c
from which air is drawn to supply the furnace.
The air from the ash pit e passes up the side flues d' into the flue d in front of
the furnace, from which it passes through a number of small tubes or passages d²
into the upper part of the furnace in finely divided streams, so as to mix readily
with the smoke and gases in the chamber a³ of the furnace before passing over the
bridge. The side flues & also communicate with the fire-chamber a³ by flues d³, ď³,
as shown.
I find it advantageous to form a number of combustion chambers in the bottom
flue by placing a series of bridges f, f, therein at suitable distances apart, such
bridges serving to prevent the too rapid escape of the gases and heated products of
combustion. The distance of the bridges f, f, from the boiler varies from three and
a half to two and a half inches according to circumstances, and the description of
fuel used, whereby the flame and heated gases are confined to the boiler in a thin
film, and thus prevented from escaping into the chimney in large volumes as in
other furnaces without coming in contact with the boiler. By my improved
arrangement of the furnace and flues a great saving of fuel is effected, and a
sufficient quantity of air being admitted for the proper combustion of the gases
smoke is to a great extent prevented.
My Invention is applicable to various forms of steam boiler and other furnaces.
Having thus described the nature of my Invention and the manner of performing
or carrying the same into practice, I would remark that I do not claim any of the
parts separately which are well known, but what I claim is,—
First. The improved method of feeding fuel and supplying heated air by the
flues d, d, d³, &, to steam boiler and other furnaces, by which fuel is economized

page_text: and smoke to a great extent prevented, substantially in the manner bereinbefore
described and represented in the Drawings annexed.
Secondly, I claim the improved arrangement and application of a series of
bridges to steam boiler and other furnaces, substantially as and for the purposes
herein before described and represented in the Drawings annexed.
Thirdly. I claim the improved general arrangement and construction of steam
boiler and other furnaces and flues, substantially in the manner and for the pur-
poses hereinbefore described and represented in the Drawings annexed.
In witness whereof, I, tho said James Young, have hereunto set my hand and
seal, this Twelfth day of July, in the year of our Lord One thousand eight
hundred and seventy-nine.
JAB. YOUNG. (L.S.)