Improvements in or relating to Water Heating Apparatus.
Year: 1899

page_text: Improvements in or relating to Water Heating Apparatus.
I, JOHN THOMAS MAZEY, of 43, Foleshill Road, Coventry, Warwickshire,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to water heating apparatus and consists, firstly, of a slow-
combustion stove or boiler and, secondly, in an improved form of pipe which may
be used in connection with such stove or in other water heating apparatus.
The
In constructing a stove according to my invention I take two cast iron, oval,
taper shells of equal length but unequal diameters. The smaller shell is arranged
within the larger and they are secured in position by top and bottom plates, the
whole being held together by longitudinal bolts. The upper plate is formed with
two oval grooves on its under side, the larger groove being adapted to receive
the top of the larger shell and the smaller groove being adapted to receive the
top of the smaller shell. The centre of the plate is carried upwards a short
distance in hollow cylindrical, form and is covered by a removable lid.
smoke pipe leads out from this cylindrical projection. The base or the lower
plate has two oval grooves on its upper surface corresponding to those on the
lower surface of the upper plate, and the lower ends of the shells are adapted to
fit into the said grooves on the base. The centre portion of the base is fitted
with firebars, preferably at a short distance above the ground. An ash tray may
be fitted under the firebars. A sliding door may be fitted on the outer shell at.
the lower part so as to give access to the firebars and ash tray, if any.
A
suitable number of tie bolts, say six, connect the top plate with the base, passing
through. the space between the shells, and are tightened by nuts at one or both
ends thereof. Tightening the bolts secures the shells firmly within the grooves
and holds the shells, top plate, and base together. Red lead or the like is
employed to secure water tight joints between the plates and shells and bolts.
Water is admitted to the annular space between the shells through an orifice in
the outer shell at or near the bottom thereof. The water is heated by the com-
bustion of coke or other suitable material or materials within the inner shell and
the water, when heated, issues from the annular space through an orifice at or
near the top of the outer shell below the smoke pipe.
According to one modification, I divide the firebars along the major axis and
support the same on a rod passing across the base under the said firebars; so
that by withdrawing the rod the halves of the firebars are able to fall downward
and release any clinker or the like which may have accumulated in the bottom
of the stove. In this case the firebars are set at a suitable height to allow of
their falling and the stove may be set on a square or other stand for this purpose.
According to a further modification, I provide the inner shell with downwardly
directed flanges at the top and bottom, and I provide the outer shell with out-
wardly directed flanges on the bottom and inwardly directed flanges on the top.
The outer shell is placed on the inner shell so that the respective flanges overlap

page_text: and such overlapping flanges are suitably bolted together. The top plate, with
smoke pipe and the like, is secured to the shells at the same time.
The above mentioned stoves are specially suitable for heating greenhouses and
for similar purposes and in conjunction therewith I prefer to employ hot water
pipes of concavo-convex section. Such pipes may be employed singly, or two or
more may be arranged one above the other. In addition to the water passing
through the pipes further water may be poured into the channel formed by the
concave side of the tube, which is arranged uppermost, and this water will be
vapourised by the heat of the pipe. These pipes may be connected to the stoves
by suitably joints; and such pipes may be used for economisers and in con-
junction with water heating apparatus generally.
Dated this 18th day of September 1899
DOUGLAS LEECHMAN,
Fellow of the Chartered Institute of Patent Agents,
18, Hertford Street, Coventry,
9, Exchange Chambers, New! Street, Birmingham, and
Chancery Lane, London, W.C., Patent Agent for the Applicant
I, JOHN THOMAS MAZEY, of 43, Foleshill Road, Coventry, Warwickshire,
Engineer, 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 relates to water heating apparatus and consists, firstly, of a slow
combustion stove or boiler and, secondly, of an improved form of pipe which may
be used in connection with such stove or in other water heating apparatus.
And in order that my invention may be properly understood I will describe
the same with the aid of the accompanying drawings, wherein
Figures I and II are side and front elevations, respectively, of a stove or boiler
constructed according to my invention.
Figure III is a vertical transverse section of the same on the line I-I in
Figure I.
Figure IV is a plan on the line II-II in Figures I and II.
Figures and VI are an inverted plan and front elevation respectively showing
a modified arrangement of firegrate.
Figures VII and VIII are an elevation and a transverse section respectively.
of a pipe constructed according to my invention.
The same numerals refer to like parts throughout the drawings.
In constructing a stove according to my invention, I take two cast-iron, oval,
taper shells 2, 3 of equal length but unequal diameters. The smaller shell 3 is
arranged within the larger 2 and the two are held in position by top and bottom
plates 4, 5, the whole being held together by longitudinal bolts. It is convenient
to make the two shells of such relative dimensions that the large end of the
inner shell may be passed through the small end of the outer
shell in fitting up the stove. The upper plate 4 is formed with two oval
grooves 7, 9 on its under side, the larger groove being adapted to receive the
top of the larger shell 2 and the smaller groove 9 being adapted to receive the top
of the smaller shell 3. The centre of the plate 4 is carried upwards in the shape
of a hollow cylinder to form a hopper 11, which is covered by a removable lid 12.

page_text: The smoke pipe 13 preferably leads out from the hopper 11 but may project
directly from the top plate, as shown in dotted lines in Figure 1. The base.or
lower plate 5 has two oval grooves 8, 10 on its upper surface corresponding to
those on the lower surface of the upper plate 4, and the lower edges of the
shells 2, 3 are adapted to enter the said grooves 8, 10 respectively as shown.
Washers 6 of asbestos or other suitable packing material are preferably laid in
the beds of all the grooves. The centre portion of the base is fitted with a fire-
grate 14, preferably at a short distance above the ground. An ash tray 15 may
be fitted under the firegrate. A sliding door 16 may be fitted on the lower part
of the outer shell 2, or preferably on the skirting 23 of the bottom plate 5, as
shown; or other suitable means may be provided for giving access to the fire-
grate and ash tray, if any. A suitable number of tie bolts 17, say six, connect
the top plate 4 with the base 5, passing through the space between the shells and
are tightened by nuts 18 at one or both ends thereof. Tightening the nuts secures
the shells 2, 3 firmly within the grooves 7, 8, 9, 10, and grips the said shells,
top plate 4, and base 5 together. In addition to the above mentioned packing,
red lead, or the like 24 is employed, or other suitable means may be adopted to
secure water tight joints between the plates and shells and bolts. Water 21 is
admitted to the annular space between the shells through an orifice 19 in the
outer shell at or near the bottom thereof. The water is heated by the combustion
of coke or other suitable material or materials 22 within the inner shell, and the
water, when heated, issues from the annular space through an orifice 20 at or
near the top of the outer shell below the smoke pipe. I sometimes divide the
firegrate 14 along the major axis and adapt the outer edges thereof to hook (25)
on to the bottom plate 5. The firegrate is normally supported on a rod 26 passing
across the base under the said firegrate; so that by withdrawing the rod the halves
of the firegrate are able to turn downwards and release any clinker or the like
which may have accumulated in the bottom of the stove.
Or, as shown, in Figures V and VI, the said firegrate may remain in one piece
and be hinged (28) by its rear end to the bottom plate and normally held up by
bar buttons 31. When the outer ends of the buttons are drawn together the
front end of the firegrate falls (Figure VI) and allows of the ready removal of the
clinker. as before. In either case the firegrate is set at a suitable height to allow
of its falling, and the stove proper is preferably raised by the skirting 23 or
otherwise for this purpose.
The above mentioned stoves are specially suitable for heating greenhouses and
for similar purposes, and in conjunction therewith I prefer to employ hot water
pipes 35 of the concavo-convex section shown in Figures VII and VIII. Such
pipes may be employed singly, or two or more may be arranged one above the
other. In addition to the water passing through the pipes, further water may be
poured into the channel 36 formed by the concave side of the pipe, which is
arranged uppermost, and this water will be vaporised by the heat of the pipe.
These pipes may be connected to the stoves by suitable joints; and are preferably
provided with cylindrical ends 37 for this purpose. Such pipes may be used for
economisers and in conjunction with water heating apparatus generally.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is:
-
1. Water heating apparatus constructed, arranged and adapted to operate sub-
stantially as herein set forth, and as illustrated in the accompanying drawings.
2. A slow combustion stove or boiler constructed, arranged and adapted to
operate substantially as herein set forth, and as illustrated in the accompanying
drawings.
3. Piping for water heating apparatus constructed, arranged and adapted to
operate substantially as herein set forth, and as illustrated in the accompanying
drawings.

page_text: 4. A stove or boiler comprising two oval, taper shells of unequal diameters, top
and bottom plates grooved to receive the edges of the said shells which are
arranged one within the other, and tie bolts passing through the space between
the shells and connecting the top and bottom plates so as to hold the two shells
and the said plates firmly together, substantially as set forth.
5. A stove or boiler, of the kind referred to in Claim 4 having a central
cylindrical hopper on the top plate, substantially as and for the purpose set forth.
6. A stove or boiler of the kind referred to in Claim 4, having a water admission
orifice near the bottom of the outer shell and a water exit orifice near the top
of the said outer shell, substantially as and for the purpose set forth.
7. A stove or boiler, of the kind referred to in Claim 4, having a falling fire-
grate, substantially as and for the purpose set forth.
8. A pipe for water heating apparatus of concavo-convex transverse section
adapted to be arranged with the channel uppermost, substantially as and for the
purpose set forth.
DOUGLAS LEECHMAN,
Fellow of the Chartered Institute of Patent Agents,
18, Hertford Street, Coventry,
9, Exchange Chambers, New Street, Birmingham, and
75, Chancery Lane, London, W.C., Patent Agent for the Applicant.