IMPROVEMENTS IN BOILER FURNACES AND OTHER FURNACES
Year: 1854

page_text: LETTERS PATENT to Moses Poole, of Avenue Road, Regent's Park,
in the County of Middlesex, for the Invention of "IMPROVEMENTS IN
BOILER FURNACES AND OTHER FURNACES"
A
Sealed the 25th April 1854, and dated the 17th February 1854.
PROVISIONAL SPECIFICATION left by the said Moses Poole at the Office
of the Commissioners of Patents, with his Petition, on the 17th February
1854.
I, MOSES POOLE, of Avenue Road, Regent's Park, in the County of Mid-
dlesex, do hereby declare the nature of the Invention for "IMPROVEMENTS IN
BOILER FURNACES AND OTHER FURNACES" to be as follows:-
My Invention consists in the use of regulating dampers placed on or near
the tops of what are commonly called flame bridges, and sometimes check
bridges, by means of which dampers the regulation of the draft of the furnace,
and the better distribution of the flame and hot products of combustion, are
rendered easy.
I construct the regulating dampers of cast iron or other
suitable material, and place them in grooved guides, so that they may slide
vertically up and down, and so govern the flame passage or flue between the
grate and the chimney; or I hang the dampers upon horizontal axes or hinges
annexed to the tops of the flame bridges, so that by turning the dampers upon
the hinges by means of rods, levers, or other suitable contrivances, the
apertures or vents of the flame passages over the flame bridges may be
increased or diminished. The dampers may be made so large in their vertical

page_text: dimension as to serve both as flame bridges and as dampers. I generally
place a damper over each flame bridge, and by varying the outlines or forms
of the upper edges of the alternate dampers the flame, &c. may be concen-
trated, or divided, or distributed ad libitum over the bottom of the boiler.
And my Invention consists further in using, in combination with the flame
bridge, dampers, pipes, or other suitable means of introducing into the flame or
hot products of combustion fresh atmospheric air behind the grate and between
the grate and the chimney, and in supplying fresh air to the flame, &c. on its
passage from the grate to the chimney; for the purpose of causing a more
perfect combustion of the smoke and other products of combustion, whereby a
considerable economy of fuel as well as more perfect combustion of smoke, &c.
is obtained. I use for this purpose cast-iron pipes to conduct the fresh air
from the atmosphere to the flame, &c., and I open the pipes nearly on a level
with the flame bridges, and I generally direct the pipes in such manner that
the discharge of fresh air shall be in the direction of the current of the flame,
&c. The fresh air may be introduced of atmospheric temperature or heated.
If the pipes introducing the fresh air run for any considerable length near the
boiler, the air in the pipes will be more or less heated on its course. Or hot air
may be allowed to enter or be forced into the pipes, and so introduced into the
flame, &c. The supply of fresh air may be regulated by valves in the pipes or
at the orifices at which the fresh air enters..
SPECIFICATION-in pursuance of the conditions of the Letters Patent, filed
by the said Moses Poole in the Great Seal Patent Office on the 16th
August 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MOSES
POOLE, of Avenue Road, Regent's Park, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of February, in the year of our Lord
One thousand eight hundred and fifty-four, in the seventeenth year of Her
reign, did, for Herself, Her 'heirs and successors, give and grant unto me, the
said. Moses Poole, Her special licence that I, the said Moses Poole, my
executors, administrators, and assigns, or such others as I, the said Moses
Poole, 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
£24.

page_text: vend; within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN BOILER FURNACES
AND OTHER FURNACES," communicated to me from abroad; upon the condition
(amongst others) that I, the said Moses Poole, by an instrument in writing
under my hand and seal, 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 Moses Poole, do hereby declare the
nature of the said Invention, and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement
thereof (that is to say):-
The Invention consists in the use of regulating dampers placed on or near
the tops of what are commonly called flame bridges, and sometimes check
bridges, by means of which dampers the regulation of the draft of the furnace
and the better distribution of the flame and lot products of combustion are
rendered easy. I construct the regulating dampers of cast iron or other suit-
able material, and place them in grooved guides, so that they may slide verti-
cally up and down, and so govern the flame passage or flue between the grate
and the chimney; or I hang the dampers upon horizontal axes or hinges
annexed to the tops of the flame bridges, so that by turning the dampers upon
the hinges by means of rods, levers, or other suitable contrivances, the aper-
tures or vents of the flame passages over the flame bridges may be increased or
diminished. The dampers may be made so large in their,vertical dimension
as to serve both as flame bridges and as dampers. I generally place a damper
over each each flame bridge, and by varying the outlines or forms of the upper:
edges of the alternate dampers the flame, &c. may be concentrated, or divided,
or distributed ad libitum over the bottom of the boiler. And the Invention
consists further in using, in combination with the flame bridge, dampers, pipes,
or other suitable means of introducing into the flame or hot products of com-
bustion fresh atmospheric air behind the grate, and between the grate and the
chimney, and in supplying fresh air to the flame, &c. on its passage from the
grate to the chimney, for the purpose of causing a more perfect combustion of
the smoke and other products of combustion, whereby a considerable economy
I use
of fuel as well as more perfect combustion of smoke, &c. is obtained.
for this purpose cast iron pipes to conduct the fresh air from the atmosphere
to the flame, &c., and I open the pipes nearly on a level with the flame
bridges, and I generally direct the pipes in such manner that the discharge of
fresh air shall be in the direction of the current of the flame, &c. The fresh

page_text: air may be introduced of atmospheric temperature or heated. If the pipes
introducing the fresh air run for any considerable length near the boiler, the
air in the pipes will be more or less heated on its course. Or hot air may be
allowed to enter or be forced into the pipes, and so introduced into the flame,
&c. The supply of fresh air may be regulated by valves in the pipes or at the
orifices at which the fresh air enters.
Having thus described the nature of the said Invention, I would remark
that I am aware that a slide or damper has before been proposed to be
employed in combination with a perforated bridge in such manner as to close
the passage above the bridge when fresh fuel is fed on to the fire, in order to
cause the products coming from the fresh coal to pass through the highly
heated passages in the bridge. I do not therfore claim generally dampers or
slides when applied to bridges of furnaces, but only when they are so applied
or arranged as to regulate the opening above the flame bridges of a furnace,
and not when they are simply arranged in a manner so as to change the
course of the flame and products of combustion coming from the furnace; and
I make this claim to the peculiar combination or use of dampers or slides in
combination with the flame bridges, whether accompanied or combined with
means of applying streams of heated or cold air or not; but I make no
claim to the use of means of supplying streams of air at or near the bridges of
furnaces.
In witness whereof, I, the said Moses Poole, have hereunto set my hand
and seal, this Twelfth day of August, in the year of our Lord One
thousand eight hundred and fifty-four.
Witness,
GEORGE WARREN,
Dover.
MOSES POOLE. (L.S.)