AN IMPROVED APPARATUS FOR CONSUMING SMOKE
Year: 1845

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN CLAY,
of Edgely, Cheshire, Corn Dealer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-third day of January, in the eighth year of Her reign,
and in the year of our Lord One thousand eight hundred and forty-five, did,
for Herself, Her heirs and successors, give and grant unto me, the said John
Clay, Her especial licence, full power, sole privilege and authority, that I, the
said John Clay, my exors, adñiors, and assigns, and such others as I, the said
John Clay, my exors, adñiors, and assigns, should at any time agree with,
and no others, from time to time and at all times during the term of years.
therein expressed, should and lawfully might make, use, exercise, and vend,
within England and Wales, and the Town of Berwick upon Tweed, my In-
vention of "AN IMPROVED APPARATUS FOR CONSUMING SMOKE;" in which said
Letters Patent is contained a proviso that I, the said John Clay, shall cause a
particular description of the nature of my said Invention, and in what manner
the same is to be performed, to be enrolled in Her Majesty's High Court of
Chancery within six calendar mouths next and immediately after the date of
the said in part recited Letters Patent, as in and by the same, reference being
thereunto had, will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
John Clay, do hereby declare the nature of my Invention of an Improved
Apparatus for Consuming Smoke to consist in a certain new construction and
arrangement of the furnace in which the fuel is placed for the purpose of
generating heat, and the manner in which such Invention is to be performed
and carried into effect will be seen by reference to the annexed Drawing, and
the following description thereof:
DESCRIPTION OF THE DRAWINGS.
The scale to which the Drawings are made is marked thereon, and the
same figures and letters of reference indicate the same parts in the various
views and section represented in the Drawing. Figure 1 represents a front
view of the furnace as applied to a steam boiler, the possition of the flues being
dotted in Figure 2 is a longitudinal section of the same; and Figure 3, a
transverse section taken on the line represented at a, a, Figure 2. In Figures
2 and 3, A represents an arch placed immediately above the furnace, and
Figure 4 represents a sectional plan taken immediately above this arch A at
the line c, c; see Figure 2. Figure 5 is a second transverse section taken at
he line b, b, Figure 2, as seen from the arrow. In Figures 1 and 2, B, B,
represent the doors of the furnace, which are formed with a double casing, and
perforated with holes for the admission of air. C are the fire bars. D is the
flue, passing under the boiler E in the ordinary manner; and I is the ash pit;
above the furnace and immediately beneath the boiler E is formed an arch of
fire brick A, which is provided with a series of openings for the free passage
of the smoke, heated air, and flame to the bottom of the boiler, as best seen at
Figures 2 and 4, the direction of which is indicated by small arrows. The
crown of the arch A has a regular inclination, so as to recede from the bottom
of the boiler; as it recedes from the front of the furnace, and at the opposite
end from the front of the furnace, is formed the chamber F, to which air can
be admitted occasionally by the flues f, f, which are opened or closed the
sliding doors G, as seen at Figures 1 and 2; at the back of this chamber F is
placed the door g, which can be opened when required for cleaning out the
chamber, and the course of the air from the chamber F to the inner surface
of the arch A is indicated by small arrows, as seen at Figures 2 and 5, but
this course of the heated air may be varied by forming openings in the arch,
as represented in red lines at Figure 2. The fire bars C are supported at each
end, the nearest end of each bar being provided with a worm pinion, which
receives motion from the worms placed on a transverse shaft driven by a strap
passing over the pulley H, as seen at Figure 1. By this arrangement cach

page_text: bar partakes of a slow revolution, and prevents the fire becoming dull in any
particular part, or clinkers forming to impede the free current of air to the
ignited fuel. In the foregoing description it will be seen that the whole of the
smoke and gases generated by the combustion of the fuel in the furnace must
pass through the small openings in the heated arch A, instead of passing from
the furnace in a large volume, as in ordinary furnaces. This wire drawing or
passing the smoke through the contracted openings in the heated arch consumes
the carbonaceous portion of such smoke, which consumption is also accelerated
when required by the admission of heated air from the chamber F. Thus the
temperature of the furnace is maintained, and the gases evolved after the
carbonaceous portion of the smoke is consumed at the arch A proceeds by
the flue D under the boiler and to the chimney in the ordinary manner.
Having now described the nature of my Invention of "An Improved Appa-
ratus for Cousuming Smoke," together with the manner in which the same may
be performed and carried into effect, I do not confine my claim of Invention
to the exact arrangement set forth and described in the annexed Drawings;
but I do claim all modifications of such Invention, the characteristic of such
consisting in the passing of the smoke and gases evolved from the furnace
through a contracted space of heated surface placed between the furnace, and
the surface to be heated, with or without the admission of air, as already
described; and I further claim the continuous or occasional revolutions of the
fire bars, as also described, all which are to the best of my knowledge new,
and never before practised in that part of Her Majesty's dominions called
England, and the Town of Berwick on Tweed, and I deliver this as my true
and faithful Specification of the same.
In witness whereof, I, the said John Clay, have hereunto set my hand
and seal, this Twenty-first day of July, in the year of our Lord One
thousand eight hundred and forty-five.
0 Signed, sealed, and delivered
(being first duly stamped) by
the within-named John Clay
JOHN (L.S.) CLAY.

page_text: AND BE IT REMEMBERED, that on the Twenty-first day of July, in
the year of our Lord 1845, the aforesaid John Clay came before our said Lady
the Queen in Her Chancery, and acknowledged the Specification aforesaid, and
all and everything therein contained and specified, in form above written.
And also the Specification aforesaid was stamped according to the tenor of the
Statute made for that purpose.
Enrolled the Twenty-third day of July, in the year of our Lord One
thousand eight hundred and forty-five.