Year: 1897

page_text: Date of Application, 17th June, 1897
+
Complete Specification Left, 17th Mar., 1898-Accepted, 20th May, 1898
I, CLEMENT JAMES GRIFFITHS, of 2, Rockstone Place, Southampton, in the County
of Hants, Major-General (Retired), do hereby declare the nature of this inven-
tion to be as follows:-
:
11.
1:
My invention relates to stoves of the kind in which a supply of fuel is con-
tained in a shaft or chamber above a fire box (hereinafter called the combustion
chamber) at the rear of which is a space or chamber (hereinafter called the rear
chamber), that is in free communication with the combustion chamber and from
the top or upper part of which the smoke flue or chimney extends so that the
stove, after being lighted, will continue to burn in a reliable manner for several
hours and without liability of the lower end of the smoke flue or chimney becoming
choked. Constructions of stoves of this kind are described in the Specification of
former Letters Patent granted to me No. 732 of 1892. Now according to my
present invention in order to increase the heating surface of such a stove when it
is to be employed in connection with hot water pipes for use in a greenhouse or
other place I provide concentrically within the fire box of the stove a water heat-
ing device consisting of a series of vertical pipes arranged in a circular or other
shaped row and connected at their ends to upper and lower horizontal pipes or
conduits that are common to the vertical pipes and are adapted to be suitably con-
nected to the water jacket of the stove the arrangement being such that when
the water heating device is in position within the fire box of the stove, the vertical
tubes at the rear of the device serve as a grate to separate the fire box from the
rear space or chamber in lieu of the vertical removable bars used in my former
constructions of stoves, whilst sufficient space is left between some of the tubes at
the front to admit of stirring or clearing the fuel within the centre of the said
device.
In one construction the combustion chamber and rear chamber are each of
partly circular shape in plan and joined together with a free opening between
them as in Figs. 3 and 4 of my former specification and are formed by a water
jacket or casing that may be of cast or wrought metal and is formed at the front
with a fire door opening and at the rear with an upper vertical outlet branch and
a lower horizontal inlet branch for connection with hot water pipes. This water
jacket at its lower end fits within a suitable metal stand by which it is carried and
which forms the sides of the ash pit and lower part of the rear chamber. The
tubular water heating device consists of an annular row of vertical pipes connected
to a lower slotted or part ring and an upper complete ring that is of larger cross
section than the lower one, the slotted or open portion of the latter ring being
arranged opposite the fire door opening. The rear portions of the two rings are
provided with screwed bosses that are suitably connected as by screw threaded tubes,
sleeves and tightening nuts, to corresponding bosses at the top and bottom of the
rear portion of the water jacket so that water will flow simultaneously through
the jacket and the water heating device, the water dividing near the inlet opening
into two streams that combine together near the outlet opening. The water heat-
י

page_text: ing device, which may be a casting or built up of wrought metal, is suitably sup-
ported within the combustion chamber, as for example upon cross bearers carried
by the stand and the rear one of which reaches to the floor level so as to form a
closed rear wall to the ash pit and separate the same from the rear chamber. The
grate at the bottom of the combustion chamber may be arranged to be inserted
in place and removed through the tubular water heating device or may be carried
by a suitable support independent of such device.
The opening in the removable top plate of the combustion and rear chambers
through which smoke escapes, is made of slot or elongated form to admit of ready
access being gained to the tubular connections between the water jacket and
tubular water heating device, the lower end of the removable smoke flue or chimney
being suitably enlarged to suit such opening and the edge of the top plate being
formed with a downwardly extending flange to fit the water jacket the outlet from
which extends through such plate.
To simplify and cheapen the cost of construction and erection of stoves of the
kind hereinabove referred to, more particularly those of small size, I dispense with
the top plate heretofore used for carrying the fuel chamber and smoke flue, and
construct the top of the casting that constitutes the water-jacket of the combustion
and rear chambers with an inner recess formed by an outer fillet or ridge.
The recessed part of the casting around the top of the rear chamber is fitted
with a plate that is cut away to fit the vertical water outlet branch from the water
jacket and has cast in one therewith the lower part of a smoke flue or chimney
having a horizontal guide way fitted with a sliding damper, the said plate being
formed with vertical holes to receive the vertical removable bars that serve to
separate the combustion chamber from the rear chamber. The recessed part of
the casting around the top of the combustion chamber is fitted with a ring or
flange that is cast in one with the removable conical fuel chamber and is made
with a raised rear part recessed at the underside so as to fit and overlap the adjacent
part of the plate that covers the rear chamber and form a practically smoke tight
joint therewith. The raised rear part of the ring or flange may be recessed or cut
away to accommodate the heads of the vertical removable bars hereinbefore referred
to. By the construction just described, I obviate the use of the bolts, nuts and
packing heretofore necessary for securing the top plate upon the water jacket, and
provide for gaining immediate access to all parts of the stove for cleaning or inspect-
ing the same and also for brushing out the flue or chimney.
Dated this 17th day of June 1897.
I, CLEMENT JAMES GRIFFITHS, of 2, Rockstone Place, Southampton, in the County
of Hants, Major-General (Retired), do hereby declare the nature of this inven-
tion and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement:-
My invention relates to stoves of the kind in which a supply of fuel is con-
tained in a shaft or chamber above a fire box (hereinafter called the combustion
chamber) at the rear of which is a space or chamber (hereinafter called the rear
chamber) that is in free communication with the combustion chamber and from
the top or upper part of which the smoke flue or chimney extends so that the

page_text: stove, after being lighted, will continue to burn in a reliable manner for several
hours and without liability of the lower end of the smoke flue or chimney becoming
choked. Constructions of stoves of this kind are described in the Specification of
former Letters Patent granted to me No. 732 of 1892. Now according to my
present invention in order to increase the heating surface of such a stove when it
is to be employed in connection with hot water pipes for use in a greenhouse or
other place, I provide concentrically within the fire box of the stove a water heat-
ing device consisting of a series of vertical pipes arranged in a circular or other
shaped row and connected at their ends to upper and lower horizontal pipes or
conduits that are common to the vertical pipes and are adapted to be suitably con-
nected to the water jacket of the stove, the arrangement being such that when
the water heating device is in position within the fire box of the stove, the vertical
tubes at the rear of the device serve as a grate to separate the fire box from the
rear space or chamber in lieu of the vertical removable bars used in my former
constructions of stoves, whilst sufficient space is left between some of the tubes at
the front to admit of stirring or clearing the fuel within the centre of the said
device.
Figs. 1, 2 and 3 of the accompanying illustrative drawings show one construc-
tion of stove with water heating device according to this invention, Fig. 1 being
a vertical transverse section, Fig. 2 a horizontal section on the line A B of Fig. 1,
and Fig. 3 a plan.
In this arrangement the combustion chamber 1 and rear chamber 2 are each
of partly circular shape in plan and joined together with a free opening between
them as in Figs. 3 and 4 of my said former specification and are formed by a water
jacket or casing 3 that may be of cast metal (as shown and as preferred) or of
wrought metal and is formed at the front with a fire door opening 4 closed by a
door 4 and at the rear with an upper vertical outlet branch 5 and a lower hori-
zontal inlet branch 6 for connection with hot water pipes. The water jacket 3 at
its lower end fits within a suitable metal stand 7 by which it is carried and which
forms the sides of the ash pit 8 and lower part 2 of the rear chamber 2. The
tubular water heating device consists of an annular row of vertical pipes 9 con-
nected to a lower slotted or part ring 10 and an upper complete ring 11 that is of
larger cross section than the lower one, the slotted or open portion 10" of the part
ring 10 being arranged opposite the fire door opening 4. The rear portions of
the two rings are provided with screwed bosses 12, that are suitably connected, as
by screw threaded tubes 13, 13" sleeves 14 and tightening nuts 15, to corresponding
bosses 16 at the top and bottom of the rear portion of the water jacket 3 so that
water will flow simultaneously through the jacket and the water heating device,
the water dividing near the inlet opening 6 into two streams that combine together
near the outlet opening 5. The water heating device may be a casting or built
up of wrought iron.
In the example shown, the pipes 9 and rings 10 and 11 comprising such device
are made separate from each other as iron castings, the ends of the pipes being
formed as spigots (Fig. 1) arranged to enter sockets in the rings and bear upon
packing rings 9 of suitable material for example asbestos, and the whole being
held together by through bolts 9b. The water heating device, is suitably supported
within the combustion chamber 1, as for example upon cross bearers 17, 18
carried by the stand 7 and the rear one (18) of which reaches to the floor level
so as to form a closed rear wall to the asǹ pit 8 and separate the same from the
rear chamber 2, 2ª. The grate 1ª at the bottom of the combustion chamber 1 may
be arranged to be inserted in place and removed through the tubular water heat-
ing device as shown and be carried by a suitable support 1b independent of such
device.
19 is a removable top plate over the top of the water jacket 3 and the com-
bustion and rear chambers 1 and 2 respectively. The opening 19 in this remov-
able top plate through which smoke escapes, is made of slot or elongated form

page_text: (see Fig. 2) to admit of ready access being gained to the tubular con-
nections between the water jacket and tubular water heating device,
the lower end of the removable smoke flue or chimney 20 being suitably
enlarged to correspond to such opening and the edge of the top plate being formed
with a downwardly extending flange 19b to fit the water jacket the outlet 5 from
which extends through such plate. The conical fuel feeder or chamber 21 may 'be
connected to the top plate at one side by means of a hinge pin 3° to enable it to be
tilted over when desired, the fuel feeder or chamber being held down at the opposite
side by a cross pin a¹ that bears against the flanged lower end of the said feeder
or chamber and has its ends engaged with eye bolts a² screwed into the top plate 19
(see Fig. 3).
Fig. 4 is a part plan, Fig. 5 a part vertical section, and Fig. 6 a detail view,
showing a modified arrangement designed to simplify and cheapen the cost of
construction and erection of stoves of the kind hereinabove referred to, more par-
ticularly those of small size. In this arrangement I dispense with the top plate 19
heretofore used for carrying the fuel chamber 21 and smoke flue 20 (Figs. 1 and 3),
and construct the top of the casting that constitutes the water-jacket 3 of the com-
bustion and rear chambers with an inner recess 22 formed by an outer fillet or
ridge 23. The recessed part of the casting around the top of the rear chamber 2
is fitted with a plate 24 that is cut away as at 25 to fit the vertical water outlet
branch 5 from the water jacket and has cast in one therewith the lower part 26 of
a smoke flue or chimney having, if desired, a horizontal guide way fitted with a
sliding damper, the said plate being formed with vertical holes 27 to receive the
vertical removable bars 27" that serve to separate the combustion chamber 1 from
the rear chamber 2 (see Fig 4). The recessed part of the casting around the top
of the combustion chamber 1 is fitted with a ring or flange 21" that is cast in one
with the removable conical fuel chamber 21 (Fig. 5) and is made with a raised
rear part 21b recessed at the underside so as to fit and overlap the adjacent part
of the plate 24 that covers the rear chamber 2 and form a practically smoke tight
joint therewith. The raised rear part 21b of the ring or flange may be recessed
or cut away to accommodate the heads of the vertical removable bars 27" herein-
before referred to.
In some cases the recess 22 formed by the rib 23 is extended only sufficiently
far around the casting that constitutes the water jacket 3, to receive the plate 24,
as shown in Fig. 7 in which case the flange of the fuel chamber rests upon the
flat upper surface of the water jacket. Or instead of forming the recess 22 in the
top of the water jacket, a separate top plate or bar 19 may be fitted to the closed
top of the casting forming the water jacket so as to form therewith a recess into
which the back plate 24 fits, as shown in cross section in Fig. 8, and also it may
be the flanged lower end of the conical fuel chamber. By either of the construc-
tions just described, I obviate the use of the bolts, nuts and packing heretofore
necessary for securing the top plate or plates upon and to the side walls of the
water jacket, and provide for gaining immediate access to all parts of the stove for
cleaning or inspecting the same and also for brushing out the flue or chimney.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
--
1. In a stove of the kind herein referred to provided with a water jacket, a water
heating device arranged within the fire box or combustion chamber of the stove
and comprising a series of vertical pipes arranged in a circular or other shaped row
and connected at their ends to upper and lower horizontal pipes or conduits that
are common to the vertical pipes and are suitably connected to the water jacket
of the stove near the top and bottom thereof, the arrangement being such that
when the water heating device is in position within the fire box of the stove, the
vertical tubes at the rear of the device serve as a grate to separate the firebox
from the rear space or chamber of the stove whilst space is left between tubes at
7

page_text: the front to admit of stirring or clearing the fuel within the centre of the said
device, substantially as described.
2. My improved stove constructed, arranged and operating substantially as
hereinbefore described with reference to and shown in Figs. 1, 2 and 3 of the
drawings annexed.
3. The improved construction of stove of the kind herein referred to wherein
the top of the casting forming the water jacket is formed or provided with an
inner recessed part fitted with a removable plate that forms the top of the rear
chamber of the stove, carries the lower part of the smoke flue or chimney, and is
formed with holes to receive the removable vertical bars serving to separate the
combustion chamber from the rear chamber, the lower flanged end of the fuel
chamber being also carried by the said recessed part and arranged to overlap the
said removable plate as hereinbefore described with reference to and shown in
Figs. 4, 5, and 6, or modified according to Fig. 7, or according to Fig. 8 of the
drawings annexed for the purposes set forth.
Dated this 17th day of March 1898.
For the Applicant,
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.