IMPROVEMENTS IN THE MEANS OF CON- SUMING SMOKE
Year: 1853

page_text: LETTERS PATENT to James Bristow, of Bouverio Street, in the
City of London, Miller, and Henry Attwood, of Holland Street,
Blackfriars Road, in the County of Surrey, Engineer, for the
ve on Cowawa SARD
Invention
PROVISIONAL SPECIFICATION left by the said James Bristow and
Henry Attwood at the Office of the Commissioners of Patents,
with their Petition, on the 29th April 1853.
We, JAMES BRISTOW and HENRY ATTWOOD, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN THE MEANS OF CON-
SUMING SMOKE" to be as follows:-
This Invention relates to a mode of constructing or arranging the
flues of adjacent furnaces or fireplaces so that the smoke or gases of
combustion arising from one fireplace or furnace may be conducted
over the bright fire of another fireplace, and be thereby consumed.
This object is effected by bringing the several adjacent furnaces into
communication with a flue or flues provided witli dampers. When

page_text: fresh fuel is thrown on to one of the fires, the damper in the exit flue
of that furnace being closed, the smoke and gases generated may be
diverted into the flue which connects with all the furnaces, and be
thereby conducted into a furnace having a bright fire, to be there con-
sumed. When no more snioke is given off from the recently charged
fireplace, the damper in the exit flue is opened, and communication with
the smoke-conducting flue is cut off. Any number of fireplaces or
furnaces can be thus connected together, so as to admit of the smoke
and gasses from any ouc fireplace of the series being conducted to any
other fireplace, to be consumed.
The flues may be constructed of iron tubing, or they may be built up
in the brickwork, and dampers should be provided for all the furnaces,
to admit of each being readily thrown into and out of communication
with the smoke-conducting flue.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James Bristow and Henry Attwood in the Great
Seal Patent Office, on the 29th October 1853.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we,
JAMES BRISTOW, of Bouverie Street, in the City of London, Miller, and
HENRY ATTWOOD, of Holland Street, Blackfriars Road, in the County
of Surrey, Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by
Her Letters Patent, bearing date the Twenty-ninth day of April, in the
year of our Lord One thousand eight hundred and fifty-three, in the
sixteenth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto us, the said James Bristow and Henry Attwood,
Her special licence, that we, the said James Bristow and Henry
Attwood, our executors, administrators, and assigns, or such others as
we, the said James Bristow and Henry Attwood, our executors, ad-
ministrators, 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,

page_text: within the United Kingdoin of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN THE
MEANS OF CONSUMING SMOKE," upon the condition (amongst others) that
we, the said James Bristow and Henry Attwood, by an instrument
in writing under our hands and seals, or under the hand and seal of one
of us, 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 we, the said James Bristow and Henry
Attwood, do hereby declare the nature of our said Invention, and
in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement, refer-
ence being had to the Drawing hereunto annexed, and to the letters
and figures marked thereon (that is to say):
Our Invention relates to a mode of constructing or arranging the
flues of steam boiler and other furnaces, when two or more are set side
by side, or brought into connection with each other, so that the smoke
or gases of combustion given off from one furnace may be conducted
over the bright fire of another furnace, and be thereby consumed.
This object we effect by bringing the several adjacent furnaces into
communication with a common flue, provided with dampers, which will
permit of a temporary connection being set up between any two fur-
naces in the range. Thus, when fresh fuel is thrown on to one of the
furnace fires, by liverting the course of the gases generated in that
furnace, and causing them to enter the common flue (which diversion
may be effected by closing the damper in the exit flue of the smoking
furnace), the smoke and gases may be conducted into a furnace having
a bright fire, and be there consumed. When smoke ceases to be given
off from the recently charged fireplace, we then turn the gases of com-
bustion into their proper channel, and allow them to escape into the
chimney.
In the accompanying Drawing, Fig. 1, shews in front elevation,
Fig. 2, in sectional elevation, and Fig. 3, in sectional plan, the manner

page_text: of connecting together a series of steam boiler furnaces according to
our Invention. a, a, are the boilers, which are severally set in brick-
work, which forms a flue b, around them of the ordinary kind. Into
this fuc the flame and heated gases from the fireplace c, pass by a
fluc d, which runs under the boiler, and the gases having circulated
through the flue b, escape into a common flue e, at the back of the
furnaces, and finally make their exit at the chimney f. Immediately
over the fireplace c, in each furnace, is an opening which leads to a
flue g, formed in the brickwork, and running from end to end of the
series of furnaces.
These several openings are commanded by a sliding door or damper 7,
which, when closed, cuts off the communication between the several fur-
naces and the flucg. The flues b, near that end which connects with the
common fluc c, at the back of the furnaces, are likewise severally pro-
vided with a damper i, for cutting off the communication between their
respective furnaces and the flue e. These dampers i, are each suspended
by a chain k, which passes over carrier pullies, and is thereby brought to
the front of the furnace, to enable the attendant to raise and lower the
dlampers with facility.
Supposing, now, a bright fire to be burning in the furnace No. 1, and
a fresh charge of coals to be required in the furnace No. 2, the attendant
will, prior to throwing on the coals, close the damper i, of the latter
furnace, and open the damper h, of both furnaces, whereby the smoke
arising from the fresh charge will be diverted from its usual course
towards the chimney, and thrown back to the front of the furnace. A
communication being now established between the furnaces Nos. 1,
and 2, the smoke will pass from the latter into the fireplace c, of the
former, which contains, we have said, a bright fire, and it will be there
consumed. When smoke is no longer given off by the fire in the
furnace No. 2, the damper i, of that furnace is to be opened; and sup-
posing the fire to be now burning brightly in this furnace, and a fresh
supply of coals to be required for furnace No. 3, the damper i, of the
latter furnace is to be closed, and a communication established (in like
manner to that just described) between the furnaces Nos. 2, and 3; the
damper h, of furnace No. 1, being closed to cut off the connection

page_text: between that furnace and the common flue g. It will thus be understood
that any two furnaces of a series can be connected together at pleasure,
for the purpose of diverting the smoke generated in one furnace on to
the bed of bright coals in an adjacent furnace, and thereby effecting the
combustion of the smoke. Instead of employing a flue built up in the
brickwork, for producing a passage of communication between the
fireplaces of several furnaces, iron or other tubing, having short branch
pipes leading to the several furnaces, may with advantage be used,
especially when the Invention is required to he applied to furnaces
already constructed.
Having now described our Invention of Improvements in the Means
of Consuming Smoke, we wish it to be understood that we lay no claim
to the broad principle of diverting the smoke and heated gases generated
in one furnace, and passing them under or over the bright fire in an
adjacent furnace; but what we desire to secure under the above in part
recited Letters Patent is, the means herein-before described, by which
any two of a series of furnaces may be readily brought into connection
with each other, for the purpose of effecting the combustion of the
smoke given off from the successive charges of coal supplied to such
furnaces.
In witness whereof, we, the said James Bristow and Henry
Attwood, have hereunto set our hands and seals, the Twenty-
seventh day of October, in the year of our Lord One thousand
eight hundred and fifty-three.
10
Witness, J. W, MOFFATT,
JAMES BRISTOW, jun. (L.S.)
HENRY ATTWOOD. (L.S.)
66, Chancery Lane.