IMPROVEMENTS IN STEAM ENGINE BOILER AND OTHER FURNACES
Year: 1855

page_text: LETTERS PATENT to Thomas Barling, of Weymouth, in the County of
Dorsetshire, Druggist, for the Invention of "IMPROVEMENTS IN STEAM
ENGINE BOILER AND OTHER FURNACES."
Sealed the 21st December 1855, and dated the 30th June 1855.
PROVISIONAL SPECIFICATION left by the said Thomas Barling at the
Office of the Commissioners of Patents, with his Petition, on the 30th
June 1855.
I, THOMAS BARLING, of Weymouth, in the County of Dorsetshire, Druggist,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
STEAM ENGINE BOILER AND OTHER FURNACES" to be as follows:--
My said Invention refers to a peculiar construction of furnaces to effect a
more perfect combustion of the solid and gaseous fuel, and thereby prevent the
production of smoke.
I provide tubular iron fire bars, so arranged as to keep a constant current of
water or water and steam through them, either by connexion with the boiler,
or a supplementary boiler or cistern. The grate bars. I place as is customary,
or at an angle; and the furnace bridge I build on an arch, or other-suitable-
support, in such a manner that it entirely occupies the space between the back.
surface of the grate and the boiler bottom, thereby compelling the air and
gaseous products to pass through the mass of solid fuel and the bar spaces,

page_text: whence the flame and products of combustion pass under the said bridge and
to the boiler bottom or flues into the chimney.
I close the front of the ash-pit with a door and the mouth of the furnace I
leave open, or partially close it by a door, slide, or other contrivance. I provide
a small fire-place at any convenient part near the chimney, to be used for
creating a draught, by lighting it previous to lighting the main furnace. The
novelty of my said. Invention consists in causing, the draught to pass from the
mouth of the furnace downwards through the burning fuel and the fire grate,
the draught being; if required; promoted-by steam or other means.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Thomas Barling in the Great Seal Patent Office on the 29th
December 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, THOMAS
BARLING, of Weymouth, in the County of Dorsetshire, Druggist; send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date, the Thirtieth day of June, in the year of our Lord
One thousand eight hundred and fifty-five, in the nineteenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Thomas Barling, Her special licence that I, the said Thomas Barling, my
executors,, administrators, and assigns, or such others as I, the said Thomas
Barling, 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 Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN STEAM ENGINE
BOILER AND OTHER FURNACES," upon the condition (amongst others) that the
said Thomas Barling, by an instrument in writing under his hand and seal,
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, Letter's Patent.
NOW KNOW YE, that I, the said Thomas Barling, do hereby declare.the
nature of my said Invention, and in what manner the same is to-be-per-
formed, to be particularly described and ascertained in and by the following
statement
My said Invention refers to a peculiar construction of, furnaces? to effect a

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the production of smoke. And for the better understanding of the same, I will
now proceed to give a detailed account of my said improvements, reference
being had to the Drawings hereunto annexed, in which the same letters
indicate like parts throughout.
!.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section of a Cornish or cylindrical boiler supplied
with my improved furnace; Figure 2 is a front elevation of the same, with a
perspective view of the furnace; and Figure 3 is an enlarged: longitudinal
section of the hollow fire bars and water chests. A is the grating of the
furnace, composed of hollow iron bars, their ends opening at back and front
into the larger tubes or water chests a and b, and which are supplied with
openings for the ingress of water and the egress of steam; B is the fire tube
or flue in which the furnace is set; C, the furnace mouth, left permanently
open, or may have a slide or door to vary the opening, as desirable; D is the
ash-pit, closed at d with a well-fitting door; E is a partition, of fire-proof
material, built on or near the tube b', and entirely closing the space between it
and the top of the flue at c.
It will thus be seen that I provide hollow or tubular iron fire bars so
arranged as to keep a constant supply of water or steam in them from any
convenient source, the steam from which may be discharged up the chimney to
increase the draught. The grate bars I prefer to be hollow or tubular, and to
place them as is customary, or at any angle; and the furnace bridge I build
on an arch, or other suitable support, in such a manner that it entirely occupies
the space between the back surface of the grate and the boiler bottom or top
of the flue, thereby compelling the air and gaseous products to pass through
the interstices of the mass of solid fuel and through the bar spaces, whence
the flame and products of combustion pass under the said bridge or partition
to the boiler bottom and flues. I close the front of the ash-pit with a door,
and the mouth of the furnace I leave open, or regulate the partial closing of it
by a door; slide, or other contrivance.
Having thus fully described my said improvements, I would observe that I
do not limit myself to any precise dimensions, form, or situation of the several
parts; neither do I restrict myself to the employment of hollow bars, nor to the
-angle-at-which-the-bars-may-be-placed,-my-said-improvements being capable
of various modifications according-to-the-class-of-fires-and-furnaces-to-which-
they may have to be applied; and I do declare that what I claim as my
Invention is, namely, the peculiar construction of furnaces or fire-places for

page_text: promoting the combustion of the fuel by a downward draught through a novel
arrangement of fire bars, as described..
In witness whereof, I, the said Thomas Barling, have hereunto set my
hand and seal, this. Twenty-sixth day of December, in the year of our
Lord 1855.
THOMAS BARLING. (L.S.)