IMPROVEMENTS IN STOVES OR HEATERS FOR APARTMENTS."
Year: 1881

page_text: LETTERS PATENT to James Dunnachie, of Glenboig Star Fire Clay Works, in
the County of Lanark, North Britain, for an Invention of "IMPROVEMENTS
IN STOVES OR HEATERS FOR APARTMENTS."
PROVISIONAL SPECIFICATION left by the said James Dunnachie at the
Office of the Commissioners of Patents on the 2nd November 1881.
JAMES DUNNACHIE, of Glenboig Star Fire Clay Works, in the County of Lanark,
North Britain. "IMPROVEMENTS IN STOVES OR HEATERS FOR APARTMENTS."
This Invention has for it object to improve the construction and action of stoves
or heaters for apartments, whilst at the same time giving them an ornamental
and pleasing external appearance.
The improved stoves which are constructed for burning coal or other fuel may
be made in various forms; but in one simple and convenient modification the stove
is in the form of a square pedestal, and its side walls consist mainly of fireclay slabs
or pieces, the fireclay being by preference of the kind known as Glenboig Star
fireclay. The fireclay slabs are held in position by a light iron framework,
consisting principally of vertical corner pieces fixed on a base, and connected
together at the top, these corner pieces covering the corner joints of the fireclay
slabs. The horizontal joints of the fireclay slabs are made sufficiently close by the
edges being half-checked or made to overlap each other. The top is closed by an
ornamental iron cover with or without a fireclay lining. At the sides the fireclay
slabs may be left uncovered between the corner frame pieces, or they may be more
or less covered by iron fretwork or other ornamentation. The stove is made with
a fire door near the bottom of the front, and internally there is at the lower part a
grate or other receptacle for the fuel. Above the fuel space the interior is divided
by a mid feather or partition made of fireclay slabs, which extends from the lower
part of the back upwards in an inclined direction towards the front, but so as to
leave a space between its upper edge and the front; and the fire gases or gaseous
products of combustion have to pass up on the front side of this partition, and then
Pasins Cir

page_text: return downwards between it and the back of the stove to the flue pipe leading to
the chimney, the communication with this flue pipe being behind the partiton and
at the lower part of the back.
Amongst the advantages of this improved stove may be mentioned its
non-liability to fracture from extreine changes of temperature secured by the
simple forms of the fireclay slabs, and by the mode of combining them; also the
imparting of the heat by the fireclay to the air without the unpleasant smell often
given off by iron stoves; and also the retention by the fireclay of a store of heat
after the fuel may be exhausted, which heat is gradully given off. The stove is
essentially a fireclay stove having all the advantages of that material, and the iron
being used simply for combining the parts together and for ornamentation.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said James Dunnachie in the Great Seal Patent Office on the 1st May
1882.
James DunnachIE, of Glenboig Star Fire Clay Works, in the County of Lanark,
North Britain. "IMPROVEMENTS IN STOVES OR HEATERS FOR APARTMENTS."
My said Invention has for its object to improve the construction and action of
stoves or heaters for apartments, whilst at the same time giving them an
ornamental and pleasing external appearance.
My improved stoves which are constructed for burning coal or other fuel may be
made in various forms; but one simple and convenient modification is represented
upon a Sheet of explanatory Drawings which is hereunto appended, Figure 1 being
a front elevation; Figure 2, a vertical section as at right angles to Figure 1; and
Figure 3, a horizontal section. In these Figures the same reference numerals are
used to mark the same or like parts wherever they are repeated.
The stove which is placed upon an ornamental hearth plate 4 is in the form of a
square pedestal, and its side walls consist mainly of fireclay slabs or pieces 5, 6, 7, 8,
the fireclay being by preference of the kind known as Glenboig Star fireclay. The
fireclay slabs 5, 6, 7, 8, are held in position by a light iron framework, consisting
principally of vertical corner pieces 9 fixed on a base 10, and connected together by
plates 11 at the top, these corner pieces 9 covering the corner joints of the fireclay
slabs 5, 6, 7, 8. The horizontal joints of the fireclay slabs are made sufficiently
close by the edges being half-checked or made to overlap each other, as shown in
Figure 2. The top is closed by an ornamental iron cover 12, which may be with
or without a fireclay lining 13. At the sides the fireclay slabs 5, 6, 7, 8, may be
left uncovered between the corner frame pieces 9, or they may be more or less
covered by iron fretwork or other ornamentation.
The stove is made with a fire door 14 at the front, and below this door there is
a grating or perforated plate with a movable "register" valve 15 for regulating
the amount of air admitted directly to the fuel which is in a grate or basket 16.
A sliding ashes pan 17 is fitted beneath the fire grate, and has a small air-inlet
valve at the front of it. Above the fuel space the interior of the stove is divided
by a mid-feather or partition 18, which extends from the lower part of the back
upwards in an inclined direction towards the front, but so as to leave a space 19
between its upper edge and the front; and the fire gases or gaseous products of
combustion have to pass up on the front side of this partition 18, and then return
downwards between it and the back of the stove to the flue pipe or outlet 20
leading to the chimney. The partition 18 is made of fireclay slabs which are held
in shallow grooves formed for them in the sides 6, 8; and just below the outlet 20
there is a horizontal slab 21 which encloses a space between the lower part of the
partition 18 and the back 7 of the stove. Air enters this space by holes 22 and
proceeds from it by holes 23 in the partition 18 into the fire space; and this air
becoming heated in its passage contributes to the combustion of the fuel and
prevention of smoke. The air entering at the back is regulated by a valve 24,
passing up thence between the iron plate and the fireclay lining to the holes 22.
Amongst the advantages of my improved stove may be mentioned its non-
liability to fracture from extreme changes of temperature secured by the simple
forms of the fireclay slabs, and by the mode of combining them; also the imparting
of the heat by the fireclay to the air without the unpleasant smell often given off
by iron stoves; and also the retention by the fireclay of a store of heat after the
fuel may be exhausted, which heat is gradually given off. My improved stove is

page_text: essentially a fireclay stove having all the advantages of that material, and the iron
being used simply for combining the parts together and for ornamentation.
Having thus particularly described my said Invention, and the manner of
performing the same, I have to state that I do not restrict myself to the precise
details herein described or delineated, but that what I believe to be novel and
original, and claim as the Invention secured to me by and in terms of the herein-
before in part recited Letters Patent is,-
1. The arranging or combining together of the parts of fireclay iron-framed
stoves or heaters, substantially in the improved manner herein before described.
2. The constructing of the interior of the stove with the inclined fireclay
partition, and with an outlet from the lower part of the space at the back of
the partition, substantially as herein before described.
In witness whereof, I, the snid James Dunnachie, have hereunto set my hand
and seal, this Twenty-eighth day of April, in the year of our Lord One
thousand eight hundred and eighty-two.
JAMES DUNNACHIE. (L.S.)