IMPROVEMENTS IN LOCOMOTIVE AND STEAM BOILER FURNACES
Year: 1854

page_text: LETTERS PATENT to Charles Frederick Stansbury, of the firm of Nourse
& Co., American and General Patent Agents, of No. 17, Cornhill,
London, for the Invention of "IMPROVEMENTS IN LOCOMOTIVE AND STEAM
BOILER FURNACES." A communication from Jonathan Amory and
William Parrott, both of Boston, in the State of Massachusetts and
United States of America.
-
Sealed the 2nd February 1855, and dated the 5th August 1854.
PROVISIONAL SPECIFICATION left by the said Charles Frederick Stans-
bury at the Office of the Commissioners of Patents, with his Petition, on
the 5th August 1854.
I, CHARLES FREDERICK STANSBURY, of the firm of Nourse & Co., American
& General Patent Agents, of No. 17, Cornhill, London, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN LOCOMOTIVE AND STEAM
BOILER FURNACES," a communication from Jonathan Amory & William
Parrott, both of Boston, in the State of Massachusetts, and United States of
America, to be as follows:-
The object of these improvements is to economize fuel and to prevent the
formation of smoke by perfecting the combustion which takes place in the
furnace.
This object it is proposed to effect by two means; one, the supplying of pure
heated air to the fire, by means of a pipe passing from the external air into the

page_text: furnace through heated portions of its structure; and the other, the drawing off
the carbonic acid gas or other heavy and incombustible gases from the furnace,
by means of a pipe passing from the lower portion of the furnace, where such
gases would naturally be found, into the smoke flue or chimney.
The pipe which introduces the pure air may be so arranged as to pass
through the pipe which carries off the heavy gases, and thus the heat of the
latter be saved. I contemplate this arrangement as a part of my Invention,
and prefer it to making the pipes separate and independent.
This Invention is applicable to a variety of locomotive and boiler furnaces,
but is more especially intended as an improvement on the furnace of Henry
F. Baker, patented in England, 22d December 1847.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Frederick Stansbury in the Great Seal Patent Office
on the 3rd February 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
FREDERICK STANSBURY, of the firm of Nourse & Co., American and General
Patent Agents, of No. 17, Cornhill, London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters.
Patent, bearing date tho Fifth day of August, in the year of our Lord
One thousand eight hundred and fifty-four, in the eighteenth year of Her
reign, did, for Herself, Her heirs and successors, give unto me, the said
Charles Frederick Stansbury, Her special licence that I, the said Charles
Frederick Stansbury, my executors, administrators, and assigns, or such others
as I, the said Charles Frederick Stansbury, 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 vend, within the United Kingdom of Great
Britain and Ireland, the Channel Islands, and Isle of Man, an Invention for
IMPROVEMENTS IN LOCOMOTIVE AND STEAM BOILER FURNACES," a communication
from Jonathan Amory and William Parrott, both of Boston, in the State of
Massachusetts, and United States of America, upon the condition (amongst
others) that I, the said Charles Frederick Stansbury, 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.

page_text: NOW KNOW YE, that I, the said Charles Frederick Stansbury, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement, reference being had to the accompanying Sheet of
Drawings, in which Figure 1 is a central, longitudinal, vertical section of a
locomotive boiler with my improvements applied thereto; Figure 2 is a
transverse vertical section of the same, taken in the plane of the line A, B,
Figure 1. Figure 3 is a transverse vertical section, taken in the plane of the
line C, D, Figure 1.
The object of these improvements is to economize fuel and to prevent the
formation of smoke by perfecting the combustion which takes place in the
furnace.
This object it is proposed to offect by two means; one, the supplying of pure
heated air to the fire, by means of a pipe passing from the external air into the
furnace through heated portions of its structure; and the other, the drawing off
of the carbonic acid gas or other heavy and incombustible gases from the
furnace, by means of a pipe passing from the lower portion of the furnace,
where such gases would naturally be found, into the smoke flue or chimney..
The pipe which introduces the pure air may be so arranged as to pass
through the pipe which carries off the heavy gases, and thus the heat of the
latter be saved. I contemplate this arrangement as part of my Invention, and
prefer it to having the pipes separate and independent.
This Invention is applicable to a variety of locomotive and other boiler
furnaces, but is more especially intended as an improvement on the furnace
of Henry F. Baker, patented in England on the Twenty-second of December
One thousand eight hundred and forty-seven. In Baker's furnace the uncon-
sumed volatile products of combustion are retarded in their passage to the
chimney by a series of reverberatory chambers of semi-elliptical form, through
which said products are circulated, and where they are retained long enough
to exhaust their heat, deliver it to the boiler, and ensure their perfect com-
bustion. The
passages or chambers under the boiler are thus kept constantly
heated, and it is by taking advantage of this heat that I am enabled to deliver
hot air to the burning fuel.
In the accompanying Drawings, a, a, represent a locomotive steam boiler,
surrounding and enclosing a furnace constructed on Baker's plan; b, b, is the
fire chamber; d, d, &c. a series of reverberatory chambers, formed by the
bridges e, e, and communicating with the fire chamber b, b. In a stationary
engine these chambers d, d, &c. may also communicate by means of the
spaces ff, with a series of ovens g, g, under the fire bridges c, e. The

page_text: chambers, spaces, and ovens are kept hot by the reverberation of the flame in
its passage from the furnace to the chimney. Near the bottom of the furnace
and through the fire bridges e, e, I insert a pipe or tube h, h, one end of which
enters into the fire chamber b, b, while the other communicates with the cold
external air. This. pipe being kept hot by the circulation of the heated
currents in the chambers, &c. heats the air which passes through it to the fire,
improving the combustion by means of heat otherwise wasted. Instead of
entering the fire chamber, the pipe h, h, may enter either of the chambers d, d,
or a separate pipe may conduct air to each or any number of said chambers.
The pipe for conducting off heavy and incombustible gases is marked i, i, in
the Drawings. It is placed near the bottom of the furnace at the end most
remote from the fire chamber. One end of this pipe opens into the smoke
pipe k, into which the carbonic acid and other heavy products escape through
the pipe i, i. This. pipe is représented as surrounding the pipe h, h, but they
may be separate, if preferred. I prefer the arrangement shown, as the heat
of the escaping gases is this imparted to the entering air..
The ovens g, g,. under the fire bridges e, e, may be constructed so as to con-
tain water and form part of the boiler, or to contain air, as the nature of the
work or the fuel employed may require.
Having thus described my improvements, what I claim under the above in
part recited Letters Patent is,
First, conducting off the heavy gaseous products of combustion by means
of a pipe connecting the lower portion of the furnace with the smoke pipe
or flue.
And, second, surrounding the induction pipe h, h, with a larger eduction
pipe i, i, by which means the heat of the escaping heavy gaseous products is
imparted to the puro air entering to supply the fire.
In witness whereof, I, the said Charles Frederick Stansbury, have here-
unto set my hand and seal, this Third day of February; in the year of
our Lord One thousand eight hundred and fifty-five.
FREDERICK STANSBURY.
(L.S.)