Improvements in Boiler Furnaces in relation to Smoke Consuming and Greater Economy of Fuel and Quicker Steam Generating.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in Boiler Furnaces in relation to Smoke Consuming
and Greater Economy of Fuel and Quicker Steam Generating.
I, WILLIAM RALPH SAGE of 48 Blackhorse Lane, Ipswich in the County
of Suffolk Engineer do hereby declare the nature of this invention to be as
follows:-
This invention consists of an air chamber attached to the back of the furnace
front, which chamber I term the top chamber, also another air chamber which I
term the bottom chamber, placed underneath the top chamber, these air chambers
allow the air to circulate around the stoke hole, where it gets heated before passing
on to the grate. On each side of the bottom air chamber a pipe is attached, which
pipes pass along the ash pit into a chamber in the bridge. A steam pipe is
attached to the boiler front and carried along the ash pit to the bridge chamber, to
which it is fixed in such a position so as to discharge steam into each of the
pipes attached to the bottom air chamber, this steam jet also takes the hot air with
it into the pipes from the bridge chamber. The steam is regulated by a steam
cock or valve. The steam and hot air passes through the pipes into the bottom
chamber where it circulates with the air which is admitted to the top chamber
through holes in furnace front.
The steam and heated air is passed into the furnace by drawing out a sliding
door in the top of the bottom chamber, another sliding door is also placed in the
bottom of same chamber, for passing steam into ash pit, and cleaning out chamber,
should this door be omitted to be drawn, three holes in each side of back end of
top chamber are provided to allow the steam to escape into furnace.
This invention is illustrated in the accompanying drawing, in which
Fig. 1 represents a front view of furnace for a Cornish boiler. Fig. 2 a
longitudinal section of same. Fig. 3 a sectional plan of same, and
Fig. 4 a front view of bridge.
Reference being had to the figures and letters marked thereon, similar letters
indicate corresponding parts.
In the drawing the letter A designates the top air chamber, into which the air
is admitted through holes a. a. and the holes b. 6. are to allow the air and steam
to escape into furnace, the holes c. c. are to admit cold air on to baffle plate. B. is
the bottom air chamber, with sliding door C. at top to allow the air and steam to
pass into furnace. D. is the bottom sliding door to admit steam into ash pit and
cleaning out chamber.
E. E. are the pipes leading into the bridge chamber F.
G. is the steam pipe.

page_text: Improvements in Boiler Furnaces in relation to Smoke Consuming
and Greater Economy of Fuel and Quicker Steam Generating.
I WILLIAM RALPH SAGE of 48 Blackhorse Lane Ipswich in the County
of Suffolk Engineer do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention consists of an air_chamber attached to the back of the furnace
front, which chamber I term the top chamber, also another air chamber which I
term the bottom chamber, placed underneath the top chamber, these air chambers
allow the air to circulate around the stoke hole, where it gets heated before passing
on to the grate.
On each side of the bottom air chamber a pipe is attached which pipes pass along-
the ash pit into a chamber in the bridge.
A steam pipe is attached to boiler front and carried along the ash pit to the
bridge chamber to which it is fixed in such a position so as to discharge steam
into each of the pipes attached to the bottom air chamber, this steam jet also takes
the hot air with it into the pipes from the bridge chamber, the steam is regulated.
by a steam cock or valve.
The steam and hot air passes through the pipes into the bottom chamber, where
it circulates with the air, which is admitted to the top chamber through holes in
"furnace front.
The steam and heated air is passed into the furnace by drawing out a sliding.
door in the top of the bottom chamber, another sliding door is also placed in the
bottom of same chamber, for passing steam into ash pit, and cleaning out chamber,
should this door be omitted to be drawn, three holes in each side of back end of
top chamber are provided to allow the steam to escape into furnace.
This invention is illustrated in the drawing "filed with my Provisional Specifi-
cation" in which
Fig. 1. represents a front view of furnace for a Cornish boiler. Fig. 2. a
longitudinal section of same, Fig. 3. a sectional plan of same, and
Fig. 4. a front view of bridge.
Reference being had to the figures and letters marked thereon, similar letters
indicate corresponding parts.
In the drawing the letter A. designates the top air chamber, into which the air
is admitted through holes a. a. aud the holes b. b. are to allow the air and steam to
escape into furnace, the holes c. c. are to admit cold air on to the baffle plate. B. is
the bottom air chamber with sliding door C. at top, to allow the air and steam to
pass into furnace. D. is the bottom sliding door to admit steam into ash pit
and cleaning out chamber. E. E. are the pipes leading into the bridge F. G. is
the steam pipe.
The sliding doors in bottom air chamber, both at top and bottom may be made
of wrought or cast iron.
The pipes E. E. may be made in lengths to suit circumstances, the length inside
bridge chamber, can be made with a bell mouth to give more lead for the hot air
collected in bridge.chamber.
The bridge chamber is provided with a door at top to facilitate getting at the
steam jet pipes, and adjusting same to back of bridge, so as to play centrally into
pipes leading into bottom chamber.
Having thus described the nature of the said improvements, the manner of
carrying the above into effect, is as follows namely.
In firing keep doors C, and D, closed when steam is up, open steam cock or
J

page_text: valve, and admit the steam to pipes E. E. then draw door C. the effect of the
heated air and steam on the fire is instantaneous, creating a bright clear flame.
The above invention is adaptable to Cornish, Lancashire, multitubular, vertical,
marine and locomotive types of boilers with certain modifications.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
1. The top air chamber placed on back of furnace front, with holes in front
for admitting air, and holes in back for escape of air and steam on to grate, as shewn
and described.
2. The bottom air chamber, placed under top air chamber, with top sliding
door for admitting the steam and air on to furnace, and the bottom sliding
door for admitting the steam and air into ash pit, as shewn and described.
3. The bridge with chamber, as shewn and described.
4. The steam and hot air pipes, leading from bridge chamber, to bottom air
chamber, as shewn and described.
5. The arrangement of steam pipes in bridge chamber, for passing the steam
and hot air from bridge chamber, to bottom air chamber, as shewn and described.
6. The adaption of above invention to all classes of boilers herein described.
Dated this 22nd day of February 1896.
WILLIAM RALPH SAGE.