CERTAIN IMPROVEMENTS IN APPARATUS IN APPARATUS APPLICABLE FOR THE PREVENTION OF SMOKE
Year: 1867

page_text: LETTERS PATENT to John Grundy, of Wolstenholme Hall, in the County
of Lancaster, for the Invention of "CERTAIN IMPROVEMENTS IN APPARATUS
Sealed the 10th September 1867, and dated the 16th March 1867.
PROVISIONAL SPECIFICATION left by the said John Grundy at the Office
of the Commissioners of Patents, with his Petition, on the 16th March
1867.
I, JOHN GRUNDY, of Wolstenholme Hall, in the County of Lancaster, do
hereby declare the nature of the said Invention for "CERTAIN IMPROVEMENTS IN
APPARATUS APPLICABLE FOR THE PREVENTION OF SMOKE," to be as follows:-
This Invention is designed for the introduction of heated air behind the
fire-bars and then to supply a strong heat radiating surface, so that by the
combination the gaseous and combustible portion of the smoke arising from
the furnace may be consumed in its passage over such surface.
The improvements consist in the use of a chamber made of "fire-clay "
which is fixed on brickwork or supports in the position of and forming part of
the ordinary "bridge" in the furnace flue, the fire-bars abutting up against
such chamber. This chamber is made of fire-clay, and is enclosed on all sides,

page_text: excepting a longitudinal slot at the bottom of the face or front where the
fire-bars meet it, and the front edge of the bottom chamber has a series of
grooves sloping from back to front to supply air from beneath the bars to the
interior of the chamber, which air becomes heated by passing through the
fire-clay chamber and escapes through perforations in the roof of the chamber
into the flue, where mixing with the smoke it assists in effecting the com-
bustion thereof.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Grundy in the Great Seal Patent Office on the 16th
September 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
GRUNDY, of Wolstenholme Hall, in the County of Lancaster, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Sixteenth day of March, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said John Grundy, Her special license that I, the said John Grundy, my
executors, administrators, and assigns, or such others as I, the said John
Grundy, 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 "CERTAIN IMPROVEMENTS IN APPA-
RATUS APPLICABLE FOR THE PREVENTION OF SMOKE," upon the condition (amongst
others) that I, the said John Grundy, 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 Patent Office within six calendar months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Grundy, do hereby declare the
nature of the 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 and accompanying Drawings (that is to say) :-
The Invention is designed for the introduction of heated air behind the

page_text: fire-bars and there to supply a strong beat radiating surface, so that the
combination of such air with the gaseous and combustible portions of the
smoke arising from the furnace may be consumed in their passage over such
surface.
The improvements consist in the use of a chamber made of "fire-clay"
which is fixed on brickwork or supports in the position of and forming part of
the ordinary "bridge" in the furnace flue, the fire-bars abutting up against
such chamber. This chamber is made of fire-clay, and is enclosed on all sides,
excepting a longitudinal slot at the bottom of the face or front where the
fire-bars meet it, and the front edge of the bottom of the chamber has a series
of grooves sloping from back to front to supply air from beneath the bars to
the interior of the chamber, which air becomes heated by passing through the
fire-clay chamber and escapes through the perforations in the roof of the
chamber into the flue, where mixing with the smoke it assists in effecting
the combustion thereof.
In order that the Invention may be better understood and explained in
detail I have hereunto attached a Sheet of Drawings illustrative of same.
Fig. 1 represents a longitudinal section of the flue of a steam boiler shewing
the position of the furnace and "bridge," and the fire-clay chamber shewn
as forming part of such bridge; Fig. 2 represents a plan view of the same
shewing the perforations on the top of the chamber for the exit of the heated
air into the flue; and Fig. 3 is an end sectional view taken through the
line A, B.
In Figs. 1, 2, 3, a, a, is the flue; b, b, are the fire-bars which bear on the
"bar bearer" c and abut against the fire-clay chamber d above the door D',
which may be regulated by the rod and handle e so as to admit more or less
air, as required, or the air may be admitted by sloping grooves or channels
beneath the bars and instead of the door, but the door is preferable because
adjustable. The passage of the air through the fire-clay chamber is indicated
by the arrows, and as the air becomes mixed with the smoke the gaseous and
combustible portions thereof are ignited by the intense heat emanating from
the fire-clay, and thus the carbonaceous parts of the smoke become perfectly
consumed.
Having now described the nature of the said Invention, together with the
method of carrying the same into practical effect, I wish it to be distinctly
understood that I claim the novel application, employment, and use of a
chamber made of fire-clay either fixed on the "bridge" in flues of boilers, or
so placed as to act therein as the bridge, whereby great beat is obtained and

page_text: air supplied at such part of the flue for the combustion of smoke, as herein-
before described, set forth, and fully illustrated in the Drawings attached.
In witness whereof, I, the said John Grundy, have hereunto set my hand
and seal, this Thirteenth day of September, in the year of our Lord
One thousand eight hundred and sixty-seven.
Witnessed by
JNO. HUGHES,
Clerk to Jno. Davies & Son,
Office for Patents,
Manchester.
JOHN GRUNDY. (L.S.)