AN IMPROVED ÅRRANGEMENT OF SMOKE CONSUMING APPARATUS
Year: 1872

page_text: LETTERS PATENT to George Kent, of Buckland, in the County of
Hants, for the Invention of "AN IMPROVED ÅRRANGEMENT OF SMOKE
CONSUMING APPARATUS."
Sealed the 9th July 1872, and dated the 11th January 1872.
PROVISIONAL SPECIFICATION left by the said George Kent at the
Office of the Commissioners of Patents, with his Petition, on the
11th January 1872.
I, GEORGE KENT, of Buckland, in the County of Hants, do hereby
declare the nature of the said Invention for "AN IMPROVED ÅRRANGEMENT
OF SMOKE CONSUMING APPARATUS," to be as follows:-
-
This Invention relates to an improved mechanical arrangement for
introducing heated air into the combustion chambers of steam boilers
for consuming the smoke and effecting more perfect combustion of the
gases formed in the furnaces thereof.
The following are examples of the application of this Invention to
marine and land boilers:-In applying it to marine boilers I propose to

page_text: pass tubes for the passage of atmospheric air through the ordinary tubes
of a multitubular boiler or through the water space thereof, one end of
the said air tubes leading into the combustion chamber and the other
end being open to the atmosphere. And as regards land boilers I
arrange and pass the aforesaid air tubes through the flues from the
furnace into the back of the boiler and along the inner shell thereof,
and I so arrange the said air tubes as that one end thereof is opened
to the atmosphere and the other end led behind the bridge of the
furnace.
The object and intention of this Invention being to so place and
arrange air tubes in boilers as that they shall pass down or along the
the combustion chamber thereof in order that the said tubes may get so
intensely heated that the air in its passage through them shall be
thoroughly superheated; and this intensely heated air coming into
contact with the smoke and gases as they leave the fire-bars will cause
the smoke and gases to ignite and thereby effect consumption of the
smoke, and further, in order that a very considerable surface of air
tubing may be exposed to the action of the heat in the combustion
chamber, I propose to bend or arrange the said tubing in a tortuous or
zig-zag direction.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said George Kent in the Great Seal Patent Office on
the 11th July 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
KENT, of Buckland, in the County of Hants, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of January, in the year
of our Lord One thousand eight hundred and seventy-two, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said George Kent, Her special
licence that I, the said George Kent, my executors, administrators,
and assigns, or such others as I, the said George Kent, 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

page_text: therein expressed, should and lawfully might make, use, exercise, and
vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "AN IMPROVED
ARRANGEMENT OF SMOKE CONSUMING APPARATUS," upon the condition
5 (amongst others) that I, the said George Kent, 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
O Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said George Kent, 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
3 following statement, that is to say :—
This Invention relates to an improved mechanical arrangement for
introducing heated air into the combustion chambers of steam boilers
for consuming the smoke and effecting more perfect combustion of the
gases formed in the furnaces thereof.
The following are examples of the application of this Invention to
marine and land boilers :-In applying it to marine boilers I propose to
pass tubes for the passage of atmospheric air through the ordinary
tubes of a multitubular boiler or through the water space thereof, one
end of the said air tubes leading into the combustion chamber, and the
other end being open to the atmosphere. And as regards land boilers,
I arrange and pass the aforesaid air tubes through the flues from the
furnace into the back of the boiler and along the inner shell thereof,
and I so arrange the said air tubes as that one end thereof is opened
to the atmosphere and the other end led behind the bridge of the
furnace.
The object and intention of this Invention being to so place and
arrange air tubes in boilers as that they shall pass down or along the
combustion chamber thereof in order that the said tubes may get so
intensely heated that the air in its passage through them shall be
thoroughly superheated, and this intensely heated air coming into
contact with the smoke and gases as they leave the fire-bars will cause
the smoke and gases to ignite and thereby effect consumption of the

page_text: smoke, and further, in order that a very considerable surface of air
tubing may be exposed to the action of the heat in the combustion
chamber I propose to bend or arrange the said tubing in a tortuous or
zig-zag direction.
And in order to explain my said Invention more fully, I now proceed
to describe the means by which it may be effected, reference being had
to the illustrative Shect of Drawings accompanying these Presents, and
to the numeral figures and letters of reference marked thereon, re-
spectively as follows :-
DESCRIPTION OF THE DRAWING.
Figure 1 represents a longitudinal and vertical section of a marine
boiler shewing the manner of applying my said improvements thereto;
Figure 2 is a transverse and vertical section taken through the
line A, B, at Figure 1; Figure 3 is a longitudinal and vertical section
of a land boiler shewing my improvements applied thereto; and
Figure 4 is a horizontal section through the line C, D, at Figure 3.
At each of the above-mentioned Figures similar letters of reference
are employed to denote corresponding parts.
A. marks the tubes of an ordinary multitubular marine boiler; B, the
outer shell or casing; C, fire-bars; D, bridge; E, ash-pit; G, combustion
chamber; H, smoke box; I, pipes for conveying superhcated air into
the combustion chamber G, the end i of the pipe I is open to the
atmosphere, and the end of the pipe I descends into the combustion
chamber G, as represented at Figures 1 and 2.
The Drawing at Figure 2 shews four air pipes I to each furnace;
K is the furnace door. The air as it passes through the pipes I
becomes superheated, and mixing with the gases from the fuel causes
them to be ignited and effect consumption of the smoke, as before
stated.
It will be seen upon referring to Figures 3 and 4 which represent a
land boiler, that the air pipe I passes through the back end of the
boiler into the hollow bridge D, and the pipe I is curved at l, and passes
along the flue of the boiler, and terminates at m in the open air.
L marks a pipe, or there may be several sets arranged or disposed in a
tortuous or zig-zag direction in the combustion chamber G, when a
considerable surface of air-conducting tubing is required to be exposed
to the action of the heat from the furnace.

page_text: The combustion chamber G, at Figures 3 and 4, terminates in a
chimney shaft not shewn by the Drawing.
It will appear obvious that in applying these improvements to
Cornish boilers, for example, constructed with two tubes, each tube may
be similarly fitted with air pipes to that lastly described with reference
to Figures 3 and 4.
I would remark that the pipes I and L may be made of cast or
wrought-iron, or fire-clay, as may be found most desirable.
Having now fully described and set forth the nature and object of
my said Invention for "An Improved Arrangement of Smoke Con-
suming Apparatus," together with the means by which it may be
effected, I would remark in conclusion that I hereby declare my
Invention to consist in, and I claim, the manner above described and
represented of arranging and operating with pipes for introducing
superheated air into the combustion chambers of marine and land
boilers for effecting consumption of smoke, as above stated.
In witness whereof, I, the said George Kent, have hereunto set my
hand and seal, this Ninth day of July, in the year of our Lord
One thousand eight hundred and seventy-two.