A NEW COMBINATION OR ARRANGE- MENT OF PARTS FORMING AN IMPROVED FURNACE, FOR CONSUMING SMOKE AND ECONOMIZING FUEL, APPLICABLE TO STEAM-ENGINE BOILERS AND OTHER FURNACES
Year: 1839

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, THOMAS
HALL, of Leeds, in the County of York, Brass Founder, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Twenty-first day of February, in the second year of Her
reign, and in the year of our Lord One thousand eight hundred and thirty-
nine, did, for Herself, Her heirs and successors, give and grant unto me, the
said Thomas Hall, Her especial licence, full power, sole privilege and authority,
that I, the said Thomas Hall, my executors, administrators, and assigns,
and such others as I, the said Thomas Hall, my executors, administrators, or
assigns, should at any time agree with, and no others, from time to time and
at all times during the term of years therein mentioned, should and lawfully
might make, use, exercise and vend, within England, Wales, and the Town
of Berwick upon Tweed, my Invention of "A NEW COMBINATION OR ARRANGE-
MENT OF PARTS FORMING AN IMPROVED FURNACE, FOR CONSUMING SMOKE AND
ECONOMIZING FUEL, APPLICABLE TO STEAM-ENGINE BOILERS AND OTHER FURNACES;"
in which said Letters Patent is contained a proviso obliging me, the said
Thomas Hall, by an instrument in writing under my hand and seal, parti-
cularly to describe and ascertain the nature of my said Invention, and in what

page_text: manner the same is to be performed, and to cause the same to be enrolled
in Her Majesty's High Court of Chancery within six calendar months 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.
NOW KNOW YE, that in compliance with the said proviso, I, the said
Thomas Hall, do hereby declare that the nature of my said Invention, and
the manner in which the same is to be performed, are particularly de-
scribed and ascertained in and by the following description thereof, reference
being had to the Drawing hereunto annexed, and to the letters and figures
marked thereon (that is to say) :-
My Invention of an improved, furnace consists in a peculiar arrangement of
two or more fire-places under one boiler, with the flues and dampers necessary
for their effective operation, whereby the smoke and gases arising from the
combustion of a fresh supply of fuel becomes consumed, by passing over the
surface of a glowing fire in the fire-place contiguous. This is effected by
dividing the furnace longitudinally into two or more parts, in order to form
two or more distinct fire-places, which are to be supplied with fresh fuel
alternately, allowing that in the adjoining fire-place over which the fresh smoke
is to be directed to have become completely red. The direction of the smoke
and
gases
is regulated by dampers placed at the ends of the furnaces, in order
that the communication with the flue may be cut off from such fire-place while
the fresh fuel is introducing, and the smoke emitted is driven over the red hot
fuel of the next fire-place through a lateral opening, by which means the
smoke becomes consumed. In the accompanying Drawing, Fig. 1 represents
a transverse section, taken through about the middle of one of the improved
furnaces; Fig. 2 is a longitudinal section, and Fig. 3 a horizontal section of
the same.
In all these Figures similar letters refer to corresponding parts.
The furnace in these Figures is divided into two compartments A and B by
the longitudinal partition a, placed in the middle between the fire-places. b, c,
are the dampers, which are to be slidden upon and down in grooves d, d, d, d,
for the purpose of directing the smoke. Toothed racks e, e, are fastened to the
lower ends of the sliding dampers, as seen in Fig. 1. A toothed wheel f
takes into gear with the racks e, e, which is actuated by a pinion g fixed on the
end of the shaft h. This pinion is made to revolve by turning the winch
handle i at its reverse end. In Fig. 1 the damper c is supposed to be up, and the
damper b down; the fire B is represented as having just received a fresh supply
of fuel, and the fire A burning brightly and giving off little or no smoke.
As

page_text: the damper c belonging to the fire-place B prevents the smoke from going
forward directly into the flue, the smoke and vapour will of course be com-
pelled to pass through the lateral opening in the partition a, and over the red
hot fuel in the fire-place A, as seen in the Drawing, which smoke and vapour
in its passage will necessarily become consumed or put into a state of combustion
before it reaches the main flue surrounding the boiler. When the fuel in B
has burnt up brightly, and ceased to give off smoke, then the damper belonging
to it should be lowered, and the damper of the fire-place A raised, which are
done simultaneously by means of the wheel and pinion before mentioned taking
into the racks affixed to the dampers. The fire-place A may then be supplied
with fresh fuel, the smoke and vapour from which will pass laterally through
the aperture in the partition a over the red hot fire in B, and will be consumed
as in the former instance. In conclusion, I desire it to be understood that I
do not intend to confine myself precisely to the arrangement of the parts as
shewn in the Drawing, being aware that they may be varied without deviating
from the principle or main feature of my Invention; but I claim as my im-
provement in the arrangement of the parts of furnaces for steam boilers
and other purposes the division of the furnace into two or more fire-places, by
means of a longitudinal partition or partitions, having a lateral aperture or
apertures communicating from one fire-place to the next fire-place adjoining,
with movable dampers at the ends of the respective fire-places for occasionally
stopping the flues, in order that the dense volume of smoke and combustable
vapour evolved at every fresh supply of fuel may be conducted into the
adjoining fire-place, where by passing over the ignited red hot fuel it may
become burnt and consumed.
In witness whereof, I, the said Thomas Hall, have hereunto set my hand
and seal, this Fifteenth day of August, in the year of our Lord One
thousand eight hundred and thirty-nine.
Signed, sealed, and delivered by the
within-named Thomas Hall in
THOMAS (L.S.) HALL.

page_text: AND BE IT REMEMBERED, that on the Fifteenth day of August, in the
Third year of the reign of Her Majesty Queen Victoria, the said Thomas Hall
came before our said Lady the Queen in Her Chancery, and acknowledged
the instrument aforesaid, and all and everything therein contained and
specified, in form above written. And also the instrument aforesaid was
stamped according to the tenor of the Statute made in the fifth year of reign
of His late Majesty King George the Third.