IMPROVED MEANS OF AND ADDANAMING DAN NATING TIDE IN STEAM SHIPS MILLS MANUFACTORIES. PROVISIONAL SPECIFICATION APPARA FOR EXTINGUISHING FIRE IN
Year: 1866

page_text: LETTERS PATENT to David Dawson, Gentleman, Dan Dawson, Chemist,
and Thomas Broadbent, Engineer, all of Milnsbridge, near Huddersfield,
in the County of York, for the Invention of "IMPROVED MEANS OF AND
ADDANAMING DAN NATING TIDE IN STEAM SHIPS MILLS MANUFACTORIES.
PROVISIONAL SPECIFICATION left by the said David Dawson, Dan
Dawson, and Thomas Broadbent at the Office of the Commissioners of
Patents, with their Petition, on the 28th June 1866.
We, DAVID DAWSON, Gentleman, DAN DAWSON, Chemist, and THOMAS
BROADBENT, Engineer, all of Milnsbridge, near Huddersfield, in the County of
York, do hereby declare the nature of the said Invention for "IMPROVED MEANS
OF AND APPARATUS FOR EXTINGUISHING FIRE IN STEAM SHIPS, MILLS, MANU-
FACTORIES, AND OTHER BUILDINGS," to be as follows:-
This Invention consists in the employment of the nitrogen and carbonic acid
gases, or the products of combustion of coal proceeding from fires or furnaces
of steam boilers or other furnaces, for the purpose of extinguishing fires in
steam ships, mills, manufactories, or other buildings.
The manner in which we obtain and employ those gases or products is as
follows:-We fix into the flue or chimney of a boiler or other furnace a

page_text: conical tube, the small end projecting outward in any convenient direction
and we either introduce (about centrally within this tube) a steam jet to blow
out at the smaller end, and thereby produce a draught or current, or we apply
a fan to the small end of the tube to exhaust and consequently draw out
from the flue the gases or products, and also force them through pipes to the
place where a fire may exist and required to be extinguished; also (by pre-
ference) we force these gases or products through a chamber in which is a
shower or series of jets of cold water for the purpose of condensing the steam
(when steam jets are used), and also for cooling the said gases or products
before applying them to the purposes intended.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said David Dawson, Dan Dawson, and Thomas Broadbent in the
Great Seal Patent Office on the 27th December 1866.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, DAVID
DAWSON, Gentleman, DAN DAWSON, Chemist, and THOMAS BROADBENT,
Engineer, all of Milnsbridge, near Huddersfield, in the County of York,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-eighth day of June, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said David Dawson, Dan Dawson, and Thomas Broadbent, Her special
licence that we, the said David Dawson, Dan Dawson, and Thomas Broad-
bent, our executors, administrators, and assigns, or such others as we, the said
David Dawson, Dan Dawson, and Thomas Broadbent, our executors, adminis-
trators, 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 "IMPROVED MEANS OF AND APPARATUS FOR EXTINGUISHING FIRE IN
STEAM SHIPS, MILLS, MANUFACTORIES, AND OTHER BUILDINGS," upon the condition
(amongst others) that we, the said David Dawson, Dan Dawson, and Thomas
Broadbent, our executors or administrators, by an instrument in writing under
our, or their, or one of our or 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

page_text: 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 David Dawson, Dan Dawson, and
Thomas Broadbent, 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 and accompanying Sheet of
Drawings (that is to say):-
This Invention consists in the employment of the nitrogen and carbonic
acid gases, or the products of combustion of coal or other fuel proceeding
from fires or furnaces of steam boilers or other furnaces, for the purpose of
extinguishing fire in steam ships, mills, manufactories, or other buildings.
The manner in which we obtain and employ these gases or products is as
follows-We fix either into the flue or chimney of a boiler or other furnace
a conical tube, the small end projecting outward in any convenient direction,
and we (by preference) introduce, about centrally, within this tube a steam
jet or steam pipe with its end directed for the steam to blow out at the smaller
end of the conical tube, and thereby to produce a draught or current which
will draw out from the flue the gases or products of combustion, and also force
them through pipes or flues to the place where a fire exists and is required to
be extinguished; or instead of a steam jet a fan may be employed for this
purpose; also (by preference) we force these gases or products through a
chamber in which is a shower or series of jets of cold water for the purpose of
condensing the steam (when a steam jet is used), and also for cooling the said
gases or products before applying them to the purposes intended; or these
gases or products of combustion may be employed without passing them
through the cooling chamber.
In carrying this Invention into practical operation, or in applying it to
steam ships, mills, manufactories, or other buildings where there are fires or
furnaces in connection or near at hand to produce the herein-before named
gases or products of combustion, we make arrangements according to the
particular circumstances of the case.
The accompanying Drawing shews one method of applying the said Invention
to an ordinary mill or factory.
A is the supposed position of a steam boiler, shewn by the dotted circle as
being in front, and removed in order to shew other parts more clearly; B, the
flue leading to the chimney; C, the conical tube fixed into the flue; D is a
steam pipe connected to the boiler and terminating in a jet about the centre
of the larger end of the conical tube; E is a stop-cock for turning on or
butting off the steam; F is a tube or flue for conveying the gases into the

page_text: cooling chamber G, which may be placed either behind the boiler, as shewn,
or in any other convenient situation. This chamber is produced with a hollow
iron top H, the bottom plate of which is perforated for the purpose of dis-
tributing water upon the gases as they enter into and pass through the cooling
chamber, and a series of rails G are placed therein to break or retard the fall
of the water, and thereby produce better effects on the gases; I is a pipe for
supplying the water from an ordinary cistern J placed on the top of the engine
house; K is a valve for regulating the admission of water; and L is a lever
for working the said valve; M, a pipe for conveying the waste water from the
cooling chamber; O, a flue or pipe for conducting the gases from the cooling
chamber to the several rooms in the mill or factory; P, P1, P2, & P3, are
valves or doors placed in openings of the wall for supplying the fire extinguishing
gases to any or all of the several rooms, as may be required, which valves are
worked separately by the levers Q, Q1, Q2, and Q8.
The manner of using this apparatus when a fire occurs is as follows:-The
damper between the conical tube and chimney must be closed, and the valve
to the room in which the fires takes place opened, the steam jet or pipe and
the water valve must also be opened, and it is advisable to keep the grates of
the furnace covered with fire as much as possible and the fire-doors closed,
except for the purpose of firing (which must be continued at intervals in order
to produce the necessary amount of gases or products of combustion required
to extinguish the fire in the mill); this being done, the whole volume of the
gases or the products of combustion from the furnace will be driven into the
room or rooms where the fire exists instead of passing up the chimney in the
usual way. This operation must be continued until the fire is perfectly
extinguished, which is quickly done, as we have found that flames can be
extinguished in three or four minutes, but to extinguish solid bodies in a state
of ignition a longer time is necessary.
In cases where damage to material is not feared it is advisable to allow the
steam to pass along with the gases until the flame is extinguished and then to
condense the steam by turning on the water into the cooling chamber in order
to supply ignited bodies with a colder medium in which their heat will be
more rapidly radiated.
Having thus described the nature of our Invention, and shewn by the
accompanying Sheet of Drawings how the same is to be performed or applied
to a mill or factory, we wish it to be clearly understood that we do not confine
ourselves to the above-described or any particular arrangements or mode of
application of these products; but what we claim as of our Invention, and
which we believe to be new within the realm, is the application of the gases

page_text: or the gasious products of combustion proceeding from the furnaces of steam
boilers and other furnaces for the purpose of extinguishing fire in places, as
berein-before set forth.
In witness whereof, I, the said Dan Dawson, for and on behalf of myself
and the said David Dawson and Thomas Broadbent, have hereunto
set my hand, this Twenty-second day of December One thousand eight
hundred and sixty-six.
Signed, sealed, and delivered by the
within-named Dan Dawson, in the
presence of
ARTHUR B. CROSSLEY,
Clerk to Wm. Tasker,
Patent Agent,
Halifax.
DAN DAWSON. (L.S.)