Year: 1898

page_text: Date of Application, 7th Apr., 1898-Accepted, 2nd July, 1898
I, FRANK J. GOULD, a Citizen of the United States, residing at Marion, Grant
County, Indiana, Manufacturer, 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:-
My invention has for its object the constant suppression of the combustion of
the fuel so that none of it will be wasted. This is effected chiefly by making the
shell of the stove air tight between the grate at the bottom and a false top or
diaphragm above the fuel, in which an opening is provided whose size can be
regulated. This opening should always exist and, during the process of combus-
tion below, it should preferably be small in comparison with the grate surface..
The size of this opening should, however, be regulated.
Another object of my invention is to so construct the part of the stove above
the false top or diaphragm that the fuel may be readily introduced into the com-
bustion chamber, and that whatever gases pass through the opening in the false
top or diaphragm, from the combustion chamber, will be caused to pass out of
the exit pipe and prevent it from escaping into the room. Therefore, it is ob-
served that my stove consists of two chambers, a lower one air tight, excepting
as above specified, and an upper one that need not necessarily be air tight.
By reason of these features and others that will hereafter be shown, it is ob-
served that I provide a heating stove or furnace which is comparatively inexpen-
sive to construct, is simple and easily controlled, is clean, is extremely economical
of fuel, and has great heating capacity. The full nature of my invention will
appear from the accompanying drawings and the description and claims following.
In the drawings, Fig. 1 is a central vertical section of my stove from front
Fig. 2 is a front elevation of the stove. Fig. 3 is a side elevation of
the false top or diaphragm and the damper in connection therewith. Fig. 4 is
a plan view of the same. Fig. 5 is a sectional view of the lower portion of the
swinging top, showing the check damper therein. Fig. 6 is a section of the stove
immediately above such damper, giving a plan view of the latter.
to rear.
In detail, 1 is the base of a stove with draft dampers 2 in the front portion
thereof. Above the base I mount a shell 3 that is air tight excepting the openings
through the grate 4 at the bottom and an opening 5 through the false top or
diaphragm 6 near the upper end thereof. The joint between this false top or
diaphragm and the shell is air tight or as nearly so as possible. The opening
therein is preferably central and is large enough to admit the fuel. This
opening 5 is closed almost entirely by a sliding damper 7 that moves in the
guideway 8 on the upper side of the false top or diaphragm 6 and is actuated
by the rod 9 that extends through the shell of the stove, as shown.
This damper 7 is cut out preferably on one side to form a small opening 10
through it when it is closed.
By this arrangement it is observed that the opening through the diaphragm 6
is never wholly closed and, after fuel has been introduced and the damper 7
closed, the size of the opening therethrough remains constant but it can be

page_text: enlarged, if the needs of the stove at any particular time require it, by pulling
the damper out a little. By having a small outlet at the top, as shown in this
opening 10, in comparison with the grate openings at the bottom, the combus-
tion of the fuel can be suppressed and yet maintained so that one charge of fuel
will last a long time. For example, with this stove I have maintained a
constant fire for seven days on fifty-eight pounds of common soft coal. During
this time the combustion, as well as the amount of heat given off, remained
constant and even. I have also found that the combustion by this means was
as nearly complete and the heat as completely economized as would seem to be
possible. For that reason, I have found that the amount of heat and the length
of time required for its combustion is practically the same per pound for all
kinds of fuel whether it be hard coal, soft coal or coke.
In order to effect this constant suppression and slow but even consumption,
it is necessary that the stove be air tight not only to prevent the escape of gases
that may form therein but to prevent the inlet of any air excepting through the
grate. In actual use the oxygen, since it enters only through the grate, will
maintain the combustion only near the grate and the fuel will feed down from
above as it is thus consumed. The amount of air or oxygen passing through
a given surface of the grate will depend upon the relative size of the opening
in the diaphragm above the fuel.
Turning now to the upper portion of the stove I provide in the main portion 12
of the top a funnel 13 whose lower end tapers toward and rather closely. ap-
proaches and registers with the opening 5 in the diaphragm 6. This is primarily
for the admission of fuel. This funnel 13 is open at its upper end when the
fuel is being introduced and is closed by a swinging top 14 which has in it a
damper 15, which is shown herein, especially in Figs. 5 and 6, as a register
damper. The swinging top has openings in it and is preferably made with open
work. When the register damper 15 is open, the air passes through the top 14,
such damper and the funnel 13 into the upper chamber of the stove and out
through the outlet pipe 16. The gases that arise from the combustion chamber,
through the diaphragm, mingle with such air when the damper 15 is open and
pass out with it through the outlet pipe 16. In this manner the gases are
prevented from escaping in the room and are carried off through the stove pipe.
Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed, I declare that what I claim
is:―
1. A heating stove comprising a shell for containing fuel divided into two
chambers by a false top or diaphragm having an opening, a damper for regu-
lating the size of such opening, a grate extending across the lower end of the
shell, the shell being imperforate between the diaphragm and grate, means for
introducing fuel through such diaphragm, and means for permitting the intro-
duction of air beneath the grate and into the upper chamber, substantially as
described.
2. A heating stove comprising a shell for containing fuel divided into two
chambers by a false top or diaphragm having an opening, a damper that can
partially but never completely close such opening, a grate extending under
the lower end of the shell, the shell being imperforate between the diaphragm
and grate, means for introducing the fuel through such diaphragm, and means
for permitting the introduction of air beneath the grate and into the upper
chamber.
3. A heating stove comprising a shell for containing fuel divided into two
chambers by a false top or diaphragm having an opening, a damper for regu-
lating the size of such opening, a grate extending across the lower end of the
shell, the shell being imperforate between the diaphragm and grate, means for
introducing fuel through such diaphragm, means for permitting the introduc-

page_text: tion of air beneath the grate, and an outlet pipe from the upper chamber, sub-
stantially as described.
4. In a stove or furnace, a shell for containing the fuel, a diaphragm that
divides the shell into an upper and a lower chamber, said diaphragm having an
opening through it, a damper to regulate said opening and which cannot be.
completely closed, a funnel above and registering with the opening in the
diaphragm, a check damper above the funnel, an outlet pipe from the upper
chamber, and a grate at the lower end of the stove through which air is admitted,
said shell being imperforate between the grate and diaphragm.