An Improved Warming Stove.
Year: 1892

page_text: An Improved Warming Stove.
I, WILLIAM HENRY MUNNS, of 106, 107, and 108 Victoria Chambers, Chancery
Lane, in the County of London, Patent Agent, do hereby declare the nature of
this invention (a communication to me from abroad by William Forbes, of
Plainwell, Michigan, U.S.A. Gentleman,) and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:
This invention relates to an improvement in heating-stoves which use either coal,
coke, or wood as a fuel, and has for its objects to provide a simple and convenient
stove which will afford a large area of heating-surface that has direct contact
with the incandescent mass of fuel and the air surrounding the stove, whereby the
air will be quickly and uniformly heated.
A further object is to furnish a heating-stove the grate of which forms the fire-
pot, which is adapted to receive a rocking movement or be completely rotated
within the stove.
•
A further object is to provide a heating-stove with a revoluble fire-pot which is
comprised of hollow bars or tubes that have communication with air outside of the
stove, and also to adapt said fire-pot to be readily removed from the walls of the
stove for repairs.
To these ends my invention consists in certain features of construction and com-
bination of parts, as hereinafter described, and pointed out in the claims.
Reference is to be made to the accompanying drawings, forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in
all the figures.
Figure 1 is a side elevation in section of the stove, taken on the line 11 in
Fig. 2, viewed in the direction of the arrows in said figure.
Fig. 2 is a front elevation in section, taken on the line 2 2 in Fig. 1, other parts
being also shown which are represented in Fig. 3.
Fig. 3 is a perspective view of the device, showing its front side and one end.
Fig. 4 is an enlarged detached view of an essential detail broken, and Fig. 5 is
a broken sectional view of one end of the stove-cylinder adapted to burn wood as
fuel.
The casing of the store is composed of metal plates or walls, there being two
parallel side walls A, that are perpendicular, which wall-plates are surmounted by a
hot-air chamber B, of smaller dimensions than the compartment below it wherein
the cylinder is located, said hot-air chamber having a laterally-extended base-
plate a, that is furnished with a depending edge and rests upon the side plates A,
to which the base-plate is joined in any suitable manner.
A series of flues a' are introduced within the chamber B, and are connected at
their ends with the front and rear vertical walls of said chamber, which they
perforate, thus affording conduits for the transmission of heat, which their walls
receive from the fire below, and on the top of the chamber B is a thimble b, that
opens into the chamber and affords a connection for a draught-pipe. (Not shown.)
The front edges of the side-plates A are inclined outwardly to a point c¹, where
a cross-bar c joins the two side-plates at the front of the stove, the front plate d
being held in place transversely below the cross-bar c, joins the side plates near
their edges, and is inclined outwardly in a plane parallel to said edges, as shown in
Fig. 1. At a proper distance from the lower edge of the plate d said front plate
is bent to throw it into a vertical portion d' of the front plate a transverse sliding
gate or damper e is secured upon the lower portion of the inclined walls of the
front plate, that is slotted at this point for the introduction of air, which the
Price 8d l

page_text: damper will control. Above the cross-bar c a door is jointed to the side plates A.
at its lower edge and inclines inwardly to allow its upper edge to fit closely against
a portion of the front plate, which is located above the door and joins the
sides A, and base-plate of the hot-air chamber B, a handle g', that is secured to
the front face of the door, affording means to manipulate it, which door, when
lowered, as shown by dotted lines (broken) in Fig. 1, will admit the entrance of
material through the opening thus afforded.
"
The rear plate h of the stove is formed below the point a similar to the shape of
the front plate d below the cross-bar c, being inclined inwardly to a point opposite
the lower edge of the damper e, and thence carried vertically downward to be
joined by a bottom plate i, that is also secured to the lower edge of the portion d¹
on the front plate, the side plates A having feet ¹ formed or secured to their
lower edges. Above the point a the rear plate or wall of the stove is extended
vertically to engage the lower surface of the base-plate a near its margin, thereby
completing a walled compartment wherein the cylindrical fire-pot C is placed, which
will be described.
Each side wall A has a circular aperture of the same diameter formed in it
oppositely. Said apertures have their centres nearly in the same horizontal plane
with the cross-bar, and are of proper dimensions to receive the cylinder-heads k,
that loosely fit within the marginal edge of the apertures. Upon the cylinder-
heads the centrally-located tubular hubs are formed or affixed, which project
laterally on each side of the heads and have their bores of the same diameter. At
equal radial distances from the centres of the cylinder-heads & equally-spaced
perforations are formed in the heads at a point near the periphery of each head,
which perforations are designed to receive a series of hollow grate-bars m, that
are of equal length and cylindrical form, the end-portions of said tubular grate.
bars fitting closely into the perforations of the heads when inserted therein.
Upon the outer faces of the cylinder-heads the segmental clamping-plates are
retained in place by a series of spacing-bolts o, the reduced ends of which bolts
pass through aligning perforations in the heads and plates formed at proper
intervals therein, the bolts being adapted to hold the plates and heads in pairs
together and the cylinder-heads properly spaced apart, as shown in Fig. 2, the
plates being perforated at points opposite the hollow bars m, the diameter of said
holes being equal to the caliber of the bars. Each set of segmental clamping
plates together form an annular disc of such a relative diameter to the cylinder-
head it is secured upon that an overlapping flange is afforded on the outer edge
of each clamping-plate, which flanges engage loosely the outer surfaces of the side
plates A of the stove, and thus prevent a longitudinal displacement of the cylindrical
fire-pot C, revoluble movement of the same being permitted..
As the stove is intended for the use of coal or wood as a fuel, when the first-
named material is to be utilized as a source of heat by its combustion there is an
elongated centre tube p inserted in the hollow hubs k, which tube or pipe when in
place corresponds in length with the distance between the outer ends of the
projecting hubs and in diameter closely fits the bores of the hubs. The ends of
the centre tube and the outer ends of the hollow hubs are transversely
channelled for the reception of the end portions of the handle-bars D, which
when seated in the channels mentioned are embraced on opposite edges by the
shoulders of the channels, or lugs on the handle-bars having a close contact
with the outer surface of the cylindrical hubs k' to coact with the channel-shoulders
and form an interlocking engagement between the end portions of the handle-bars
and the other parts named.
As shown in Fig. 2, the handle-bars D, hubs A, and centre tube p are secured
together by a long bolt p', which latter passes through aligning perforations made
laterally in the handle-bars at points which will correspond with the centre of the
tube p, the bolt being held by a nut at each end, whereby the handle-bars are
attached to the cylindrical fire-pot C and adapted to rock the latter when the bars
are vibrated.

page_text: The frictional contact of the cylinder-heads k with the side plates A would be
objectionable if the entire weight of the fire-pot C and its contents was allowed to
rest on the side plates. To obviate this and reduce friction, so that the fire-pot
may be readily agitated by a vibration of the handle-bars D, two similar bracket-
frames E are provided, which frames each consist of a pair of parallel bars centrally
joined by a transverse web s, the latter having their upper edges cut away in
circular form to receive the exterior surfaces of each of the outwardly-projecting
portions of the hubs &', the ends of the bars being secured to the base-plate a of
the heating-chamber above and the sides of the stove below the webs, spacing-
blocks t being inserted between the ends of the bars and the sides A to hold the
lower ends of the bracket-frames at a proper distance from said sides, as shown in
Fig. 2.
"
The hollow grate-bars m do not form a complete chamber or fire-pot, there being
an opening afforded by omitting two bars, as shown in Fig. 1, thus providing an
inlet for the introduction of coal or other fuel, and in order to close this opening
when the fire-pot is replenished with fuel a rocking-grate-frame F is introduced
within the fire-pot. The grate-frame F is composed of two end plates u,
that are
held spaced apart and parallel by the grate-bars u', the length of the frame being
proportioned to allow it to enter freely between the cylinder-heads & and rest upon
the inner projecting portions of the hollow hubs 1, the end-plates u having their
lower edges deeply scalloped to allow them to engage the hub ends peripherally
and retain the grate-frame thereon free to rock laterally. The fire-pot C should
for convenience normally rest on its supports with the grate-frame F opposite the
door 9 and the adjustment of the handle-bars D should be such relatively that they
will lie in a vertical plane when the grate-frame is in the position mentioned.
Such a proportionate length is given to the end plates u at their shortest points
that the grate-frame bars and said end plates will travel closely to the inner
surface of the hollow grate-bars m and bolts m', that are located near the grate-
bars which form the side boundaries of the fuel-stoking aperture, and to limit the
rocking movement of the grate-frame in either direction the studs v are inserted
in the cylinder-heads on their inner faces at such points as will allow the grate-
frame to be moved to completely open or close the aperture in the fire-pot, the
latter-named position of the grate-frame being indicated by dotted lines in Fig. 1.
Below the cylindrical fire-pot C the rectangular chamber w, which is formed by
the junction of the side walls A. with the front and rear walls, as before explained,
is utilized as an ash-pit, and through a proper sized opening formed in one side
wall the ash-receiving drawer G is introduced. Said drawer, having its inner end
open and the side walls cut rounding on the upper corners at this end, is adapted
to scoop up any droppings that fall into the ash-pit.
A cross-bar w¹ is secured on the upper edges of the side walls of the ash-drawer G
to stiffen them, and a handle w is attached to the front wall of the drawer to
permit it to be handled.
If wood is to be used as a fuel in the stove, the tube p is preferably withdrawn,
so as to afford more room within the fire-pot C, and the ends of the hollow hubs k¹
closed by cap-plates k², short bolts taking the place of the long bolt used with
the tube Ps this modified form of construction being shown as applied to one hollow
hub in Fig. 5.
In operation the hollow grate-bars m form a series of open passages through the
stove, through which air in the room circulates, and as the exterior surface of the
bars has direct contact with the burning fuel in the fire-pot C it is evident that
the air will be rapidly heated thereby. The hot-air currents produced near to the
floor of the room in which the stove is located by the parallel tubular bars render
the room comfortable in short time and will maintain a regular heat with the con-
sumption of a comparatively small quantity of fuel.
The peculiar construction of the fire-pot and its manner of support enable an
operator to change the position of the contents of the fire-pot, so as to bring
clinkers that are in the bottom of the fire to the upper surface for easy removal

page_text: through the door and also to agitate the mass of coal and thereby remove ashes
from the entire fire-bed in an expeditious manner. It is also of advantage to be
enabled to carry a fresh increment of coal below the major portion of fuel in the
fire-pot which has been partly burned, as the upward passage of the carbon gas
evolved from the fresh coal will cause it to be consumed as it filters through the
incandescent mass of coal above it, and thus save the valuable heat-producing
gaseous product that is wasted in ordinary stoves to a large degree.
Having now particularly described and ascertained the nature of this my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
1. In a stove, the combination, with stove-plates, forming a compartment and a
door therein, of a revolubly supported fire-pol within that has tubular open-end
grate-bars which extend toward and through opposite walls of the stove-compart-
ment, and a device whereby the fire-pot may be revolved, substantially as set
fortb.
2. In a heating-stove, the combination, with a walled compartment composed of
plates, a door therein at the front, and an air-damper below the door, of a revolubly-
supported transversely-located cylindrical fire-pot having tubular grate-bars that
extend through the sides of the walled compartment, and a device by which the
cylindrical fire-pot may be rotated, substantially as set forth.
3. In a heating-stove, the combination, with a compartment composed of plates,
a door thereon, an air-damper below the door, a hot-air chamber above on the
compartment, an ash-pit below therein, and a removable ash-drawer, of a revolubly-
supported transversely-located cylindrical fire-pot having hollow grate-bars which
are open at the ends and extending through the sides of the stove-compartment,
and handle-bars that are connected to the fire-pot, substantially as set forth.
4. In a heating-stove, a revoluble fire-pot comprised of cylinder-heads that have
hollow hubs that are seated on bracket-frames attached to the sides of the stoves,
cylindrically-arranged spaced tubular grate-bars that extend between the cylinder-
heads, and a grate-frame which is adapted to rock on the hollow hubs within the
fire-pot and close or open a fuel-stoking hole formed between the grate-bars, sub-
stantially as set forth."
Dated this 21st dox of July 1800
W. H. MUNNS,
Applicant.