Improvements relating to Furnaces of Steam Boilers for Consuming Smoke.
Year: 1892

page_text: Date of Application, 14th Apr., 1892
Complete Specification Left. 16th Jan.. 1893-Accepted, 25th Feb., 1893
PROVISIONAL SPECIFICATION.
Improvements relating to Furnaces of Steam Boilers for Consuming
Smoke.
I WILLIAM BEVERLEY JOICEY of 8 Saint Edmunds Place Gateshead-on-Tyne
in the County of Durham Engineer and Boiler Maker, do hereby declare the
nature of this invention to be as follows:-
This invention consists of rocking hollow firebars with air chamber bridge and
air chamber dead plates perforated to allow heated air to pass over the fuel also
inverted bridge a short distance behind fire bridge but connected to an air chamber
and bridge below in bottom of flue, this inverted bridge is made of refractory
material, my arrangement is so adapted as to use the ordinary hollow fire bar and
I have also arranged to fix blow pipes connected to fire bridge and dead plate so as
the common fire bars can be used.
In these combinations of mechanical parts I propose to use forced draught, I also,
to assist the combustion of the gases employ cowls in the form of ordinary
ventilators attached to air passages and heated air chambers descending to fire-
door front through smoke-box, the air there becoming well heated and rarefied,
will be a great auxiliary in the disposing of smoke and the better generating of
steam.
The above invention is equally well adapted for Cornish and Lancashire type of
boilers.
BROWNE & Co.,
9, Warwick Court, Gray's Inn, W.C., Agents for Applicant.
COMPLETE SPECIFICATION.
Improvements relating to Furnaces of Steam Boilers for Consuming
Smoke.
I WILLIAM BEVERLEY JOICEY of 8 Saint Edmunds Place, Gateshead-on-Tyne
in the County of Durham Engineer and Boiler Maker, 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 hollow rocking firebars with air chamber bridge and
air chamber dead plates perforated to allow heated air to pass over the fuel also
inverter bridge a short distance behind fire bridge but connected to an air chamber
and bridge below in bottom of flue, this inverted bridge is made of refractory
material, my arrangement is so adapted as to use the ordinary hollow fire bar and
I have also arranged to fix blast pipes connected to fire bridge and dead plate so as
the common fire bars can be used.
In these combinations of mechanical parts I propose to use forced draught, I
also, (to assist the combustion of the gases) employ cowls in the form of ordinary
ventilators attached to air passages and heated air chambers descending to the fire-
door front through the smoke-box the air there becoming well heated and rarefied
will be a great auxiliary in the disposing of smoke and the better generating of
steam.
The above invention is equally well adapted for the Cornish and Lancashire type

page_text: And in order that my invention may be fully understood I will proceed to explain
the same with reference to the accompanying sheets of drawings in which
Fig. 1 represents front elevation of a three flued marine boiler fitted with
furnaces and apparatus for using forced draught constructed according to this
invention.
Fig. 2 is section of same showing furnace fitted with ordinary fire-bars.
Fig. 3 is section of flue showing hollow rocking fire-bars.
Fig. 4 is plan of a portion of the fire-bars.
Fig. 5 is section of furnace fitted with hollow fire-bars.
The same letters denote the same parts in all the figs.
a is the boiler. b. the smoke-box. c. the uptake. d. d. d. the furnace doors and
the furnace.
Each furnace is fitted with fire-bars A. which may be the ordinary bars as shewn
in Fig. 2 or the hollow rocking bars shewn at Figs. 3 and 4, these fire-bars rest on
a hollow perforated dead plate I which also forms an air chamber and on the
hollow bridge or bearer E.
V. is an inverted bridge formed of refractory material having perforations therein
to allow of the passage of air from the blast pipe B. B. The pipe B. has an
orifice therein at B' to allow of the discharge of a portion of the blast into the
bridge E. from whence leads an air pipe H. to the dead plate I. It will be seen
by the arrows that the air current from the fan N. passes from the air trunk C.
along the pipe B. till it reaches the orifice B' where the current divides one
portion passing along the pipe H. through the dead plate I. and over the top of
the fire, another portion passes through the orifices in the bridge E. and a third
portion along the pipe B. and through the perforated inverted bridge V. into the
combustion chamber J.
Another current of air is drawn by the action of the fire through the cowls and
pipes F. from above the deck into the wind trunks G. thence down the pipes S.
inside the smoke-box where it is warmed into the air box Q communicating with
the lower row of tubes P., and thence through the said tubes into the combustion
chamber J., the arrows showing the direction of the current. D. are the doors to
close the ash-pits. R. are perforations in the furnace fronts for admitting heated
air into furnaces above the grates.
In Fig. 3 are shewn tubular rocking fire-bars which take the place of the
pipes H. shewn in Fig. 2, f. is the flue or furnace, B. the blast pipe, h. are tubes
having pieces k. k. formed thereon or attached thereto, l. l. are levers for rocking
the fire-bars. When the tubes h. h. are oscillated the pieces k. k. break up the
clinkers and stir the fire thus obviating the use of prickers and opening the furnace
doors for the purpose of cleaning the fires.
By this arrangement of air passages I am enabled to ensure much more perfect
combustion than has hitherto been attainable. My invention may be readily applied
to existing Cornish and Lancashire boilers by affixing new dead plates and bridges
to the existing grates.
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 1
claim is :-
1. In steam boiler furnaces the use of tubular rocking fire-bars substantially as
described and shewn at Figs. 3 and 4 of the accompanying drawings, and for the
purposes stated.
2. In steam boiler furnaces the hollow perforated dead plate I. in combination
with tubular fire-bars or blast pipes forming a communication between the said
dead plate and hollow-bridge substantially as specified.
3. In steam boiler furnaces the hollow perforated bridges E. and V. in com-
bination with a blast or air pipe or pipes B. substantially as described and shewn
in Fig. 2 of the accompanying drawings.
4. In steam boiler furnaces the combination of air-boxes Q. Q. Q. communicating

page_text: with the lowest row of tubes with air pipes S and air trunks G. situated in the
smoke-box and tubes F. terminating in cowls substantially as described.
5. The improvements in and relating to the furnaces of steam boilers for
consuming smoke substantially as described and shewn by the accompanying
drawings and operating in the manner specified.
Dated this 16th day of January 1893.
BROWNE & Co.,
9, Warwick Court, W.C., Agents for the Applicant.