Improvements in Furnaces, chiefly designed for Steam Boilers.
Year: 1896

page_text: Date of Application, 8th Oct., 1896-Accepted, 14th Nov., 1896
[Communicated from abroad by MARY FENIMORE ELLIOT, of 106 West
83rd Street, New York, United States of America, Amanuensis.]
* Improvements in Furnaces, chiefly designed for Steam Boilers.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., -Patent
Agents, 45 Southampton Buildings, in the County of Middlesex, 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:-
The invention relates to improvements in furnaces and consists in the novel
construction, arrangement and combinations of parts hereinafter described whereby
there is secured great economy, intense heat, the maximum. evaporation, the
greatest possible perfection of combustion and an absence of noxious gases.
The invention will be fully understood from the detailed description hereinafter
given, reference being had to the accompanying drawing, in which :-
Figure 1 is a central, vertical, longitudinal section of a furnace. constructed in.
accordance with and embodying the invention;
Figure 2 is an enlarged horizontal section of a portion of same on the dotted
line 2-2 of Figure 1, and
Figure 3 is an enlarged, vertical, transverse section of a portion of same on the.
dotted line 3-3 of Figure 2.
In the drawing, A designates the main masonry within which is properly
supported the boiler B'having a steam dome C, and a pipe D leading downward
therefrom and used for the purpose hereinafter described. In the forward portion
of the furnace and below the boiler B, is provided the furnace proper E, having
the grate bars F. and a rear wall G-containing an opening H leading from the ash
pit I to a chamber J, located in the rear of the furnace proper E. The rear.
wall K of the chamber J is provided with an opening L and door M, and said
wall K.extends upward.on a higher..elevation than the wall G and is connected,at
its upper end with the upper end.of said wall G by the arch or floor N. The arch
or floor N is provided with a suitable number of apertures within which are placed
the pipes O, as shown more clearly in Figure 3, the said pipes having the lateral
flanges at their upper ends fitting within conforming recesses formed in said
arch or floor N; whereby the said pipes are securely suspended in position. The.
pipes O extend downward within the chamber J, as illustrated and permit the
passage upward through the same of air.from said chamber. Below.the pipes O
is provided the series of pipes Phaving the upwardly extending nozzles Qand:
connected with the heading or pipe R, as illustrated more clearly in Figure 2,
which pipe R is directly connected with the lower end of the pipe D passing
downward from the steam dome C. The nozzles Q.extend upward from the said.
pipes P and enter the lower sends of certain of the pipes O.as.illustrated more
clearly in Figure 3 in which position they are enabled to direct the steam. passing
downward from the steam dome C upward through the said pipes. O. It is
unnecessary to provide nozzles: Qfor each of the pipes O and thence.the.nozzles Q
are limited in number and are distributed over the transverse area of the chamber J.
in order that steam in only the requisite quantities may be discharged through.the
pipes receiving the ends of said nozzles Q. Above the series of pipes. Pis
provided the rectangular frame S held and adapted to: have a vertical movement
upon the guides T and provided-upon its edges. and transverse bars V with the

page_text: vertical pins W, which are so disposed with respect to the pipes O that they pass
upward within all of those pipes whose lower ends do not receive the nozzles Q.
The frame S is connected by a hanger a with the pivotally supported lever b whose
handle c is adjacent to the door d formed in the side wall of the chamber J as
indicated more clearly in Figures 2 and 3. The lever b is adapted to be operated
by hand and its object is to enable the attendant to elevate the frame S for the
purpose of driving the pins W upward within the pipes O for the purpose of
freeing the same of any obstruction which may have lodged therein. The pins W
are small in diameter so as not to obstruct the upward passage of air through
the pipes O, but are sufficiently rigid to clear said pipes when driven upward by
means of the lever b. The upward movement of the pins W and frame S will be
effected by the lever while their own specific gravity will return them to their
downward position. The frame S and pins W may be operated as frequently as
desired and will effectually dislodge any clinker or other obstruction which may
have entered the upper end of the pipes O. Those pipes O which at their lower
ends receive the nozzles Q will be kept constantly clean by reason of the force
of steam issuing upward from said nozzles and if all of the pipes contained
nozzles the frame S and pins W would be unnecessary. Economy in the use
of the steam, however, renders the pins W and frame S desirable since by means
of my invention I attain the proper combustion with but a limited number of the
nozzles Q.
In the rear wall of the main masonry A, is provided the door Z through which
a man may enter to open the door M in the wall K and remove any ashes or other
matter which may gather upon the floor of the chamber J.
The fire having been started upon the grate bars F, air will pass upward from
the chamber. J through the pipes O and mingle with the flames and gases above
the floor or arch N, thereby promoting combustion which is accelerated, intensified
and rendered more perfect by the admission of steam upward through the nozzles Q
into the pipes O. The steam and air will meet the flames and gases after having
passed from the grate bars. F and ensure the continuance of the combustion
along the bottom and sides of the boiler B and through the tubes thereof
to the upper side of said boiler as indicated by the arrows in Figure 1. The
cinders, gases and smoke passing rearward over the arch or floor N become
ignited and consumed and hence the fuel is able to do its full duty without waste.
If desired, in some instances air under pressure in lieu of steam may be used for
the nozzles Q.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me
by my foreign correspondent, I declare that what I claim is
1. The furnace having the fire-box and boiler, combined with the wall K, the
arch or floor N, connecting said wall with the rear wall G of the fire-box, the
tubes O passing downward through said floor or arch and into the chamber J, an
opening admitting air to said chamber, and a series of nozzles.connected with a
source of air or steam supply, under pressure and leading, upward into the lower
ends of said pipes; substantially as set forth.
2. The furnace having the fire-box and boiler, combined with the wall K, the
arch or floor N connecting said wall with the rear wall G. of the fire-box, the series
of pipes O extending downward through said arch or floor into the chamber J
formed between said walls, the frame S having pins W extending upward within
said tubes, and means substantially as described for imparting to said frame and
pins a vertical reciprocating movement for the purpose of clearing the tubes;
substantially. as set forth.
i
3. The furnace having the fire-box and boiler, combined with the rear wall K,
the arch or floor N connecting said wall with the rear wall G of the fire-box, the
series of pipes; or tubes extending downward through said arch or floor into the
chamber formed beneath the same, the series of nozzles entering a portion of

page_text: said pipes O and connected by piping with the steam chamber of said boiler, and
means substantially as described for clearing those of said pipes O which are not
provided with the said nozzles; substantially as set forth.
4. The furnace having the fire-box and boiler, combined with the rear wall K,
the arch or floor connecting said wall with the rear wall G of the fire-box, the
series of pipes O extending downward through said arch or floor into the chamber J
formed beneath the same, the series of pipes P connected with the heading or
pipe R and provided with the nozzles Q entering the lower ends of said pipes O,
and the pipe D passing downward from the steam dome of the boiler to the said
pipe R; substantially as set forth.
5. The furnace having the boiler and fire-box, combined with the series of tubes
below the boiler and in rear of the fire-box, and the series of steam or air
nozzles leading into said tubes; substantially as set forth.
6. The furnace having the boiler and fire-box, combined with the series of tubes
open to receive air, and the series of steam nozzles leading into said tubes;
substantially as set forth.
Dated this 8th day of October 1896.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, W.C., Agents for the Applicant.