IMPROVEMENTS IN STOVES OR AIR-HEATING APPARATUS
Year: 1884

page_text: I SAMUEL CLELAND DAVIDSON of Belfast, in the County of Antrim, Ireland,
Merchant, do hereby declare the nature of my invention for "IMPROVEMENTS IN
STOVES OR AIR-HEATING APPARATUS," to be as follows:-
My invention relates to the stoves and apparatus described in the Specifications
of several previous Letters Patent granted to me and dated respectively 9th June
1883, N° 2886, and 14th September 1881 N° 3972.
In the stove described in the Specification of my Patent of 1883 the tiles forming
the lining of the sides of the fire-place are held upright in position by means of an
angle-bar laid along their top edges and carried at the ends in slots in the front
and back tiles or "false" sides.
In practice however this angle-bar is found to warp and twist from the effects of
the intense heat of the fire and in consequence, after a time becomes useless for
retaining the tiles in position. I therefore employ, according to my present
invention, instead of the angle-bar, a form of hook which catches into slots in
the cast-iron ribs of the "smoke chambers" described in my said previous
Specification.
These hooks project from the ribs of the smoke-flues over the top-ends of the
tiles and being held firmly at one end only i.e. where they drop into the slots in the
smoke-flue ribs, and being free at the other end and short, the fire has very little
offect upon them as regards twisting them out of shape. As a further assistance
towards holding the tiles upright I so make their bases that when set in the "tile-
bearer"
as described in my said previous Specification they incline to lean back
against the side of the fire-place and the part of the tile which is carried in the trough
of the "bearer so fits therein that it would have to break off before the tile could
fall forward into the fire and this fixture of the tiles into the tile-bearer is of itself
capable of holding them upright without the books hereinbefore described but the
hooks make them more secure and less liable to breakage.
"
The above described improvements facilitate the employment of fire-clay tiles
not only at the sides but at the front and back ends of the fire-place instead of the
iron "false sides" described in my said previous specification for, when the said
tiles are held firmly in position without having to depend on the end tiles they do
not require to extend fully to the ends of the fire place and grooves are thus left at
each end of the side tiles into which grooves the end tiles fit so as not to require

page_text: .
any other fastening, and as fire clay tiles form a more durable lining to the sides of
the fire-place than the cast iron "false sides" referred to in my said previous
specification I now preferably employ fireclay tiles or blocks for lining the fireplace
at front and back as well as at sides.
My invention comprises a modification of the stove, described in the Specification
of my said Patent of 14th September 1881 whereby it can be conveniently
constructed with brickwork instead of, the iron casing therein described and also in
certain modifications of the flame baffle-plate over top of fire whereby its tendency
to "sagging" down and twisting with the great heat of the fire is entirely
prevented.
This latter modification consists in rivetting the angle and Tee iron stiffening-
bars on top of the baffle-plate with a washer between these bars and the plate so
that a layer of air separates the bars from the plate and keeps the former from
becoming red-hot, consequently it maintains its rigidity and holds the baffle-plate up
firmly even when same is entirely at a red heat.

page_text: COMPLETE SPECIFICATION.
F
at 7"
I SAMUEL CLELAND DAVIDSON, of Belfast, in the County of Antrim, Ireland
Merchant do hereby declare the nature of my invention for "IMPROVEMENTS IN
STOVES OR AIR HEATING APPARATUS" and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
CO2
T
My invention relates to the stoves and apparatus described in the Specifications
of previous Letters Patent granted to me and dated respectively 9th June
1883,
No 2886, and 14th September 1881 N° 3972.
ཐ In the stove described in the Specification of my said patent of 1883 the tiles
forming the lining of the sides of the fire-place are held upright in position by
means of an'angle-bar laid along their top edges and carried at the ends in slots 'in
the front and back tiles " or ""false sides.""
144
• #'
In practice however this angle-bar is found to warp and twist from the effects of
the intense heat of the fire and in" consequence after a time becomes useless for
retaining the tiles in position. I therefore employ according to my present
invention, instead of the angle bar, a form of hook which catches into slots in
the cast iron ribs of the smoke-chambers described in my said previous Specification
of 1883.
:
with
These hooks project from the ribs of the smoke flues over the top ends of the
tiles and being held firmly at one end only ie where they drop into the slots in
the smoke flue ribs, and being free at the other end, and short, the fire has very
little effect upon them as regards twisting them out of shape. As a further
assistance towards holding the tiles upright their bases are so made that when set
in the "tile bearer" they incline or lean back against the side of the fire-place, and
the part of the tile which is carried in the trough of the "bearer" so fits therein
that it would have to break off before the tile could fall forward into the fire and
this fixture of the tiles into the tile bearer is of itself capable of holding them
upright without the hooks hereinbefore described but the hooks make them more
secure and less liable to breakage.
As the side tiles are thus held firmly in position without having to depend on
the end tiles they do not require to extend fully to the ends of the fire-place and
grooves are thus left at each end of the side tiles into which grooves the end tiles
fit so as not to require any other fastening.
The part of my invention which is above described is represented in Figures 1
and 2 of the accompanying drawings which are vertical sections taken at right
angles to each other of a stove or air heating apparatus.
a, a are the fireclay tiles forming the "false sides" at the right and left sides of
the fire-place. b, b are the trough shaped rests or tile bearers in which the lower
ends of the tiles a, a are set. c, c are the hooks which attach the tile-bearers b, b
to ribs at the side of the fireplace. d, d are the hooks which hold the upper ends
of the tiles. e, e are the slots in the ribs of the smoke chambers into which the
hooks d, d catch. f is the fireclay tile (or tiles) at the back of the fireplace and
g the fireclay tile (or tiles) at the front of the fire place. These tiles ƒ and g simply

page_text: fit into grooves or spaces h, h at each end of the side tiles a, a and do not require
any other fastening.
The invention further comprises a modification of the Stove described in the
Specification of my said Patent of 14th September 1881, N° 3972, whereby the
tendency of the flame baffle-plate over top of fire to "sagging" down and twisting
with the great heat of the fire is entirely prevented.
This modification of the flame baffle-plate is illustrated in Figures 3 and 4 (which
are drawn on a smaller scale than Figures 1 and 2) and consists in rivetting the
angle and tee iron stiffening bars i, i on top of the baffle-plate k with washers 1, l
between these bars and the plate so that a layer of air separates the bars from the
plate and keeps the former from becoming red-hot; consequently it maintains its
rigidity and holds the baffle-plate up firmly even when same is entirely at a red
heat. m, m are openings for the supply of cold air to mix with the products of
combustion in the chamber n. .o is the base of a drying chamber placed on top of
the air heating apparatus and supplied with heated air from same.
This stove can be conveniently constructed of brickwork as illustrated in the
figures, instead of the iron casing described in my previous Specification N° 3972
of 1881.
:
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, in respect of stoves or air heating apparatus, is
1. The combination with the fireclay tiles, lining the sides of the fireplace, of
retaining hooks at their upper ends, said hooks catching into slots in the cast
iron ribs of the smoke chambers, and of a trough shaped rest for their lower ends
substantially as herein before described and represented in Figures 1 and 2 of the
accompanying drawings.
.
2. The combination of parts forming an improved stove or air heating apparatus
substantially as described and represented in Figures 1 and 2.
3. In stoves of the kind referred to in the Specification of my Patent, N° 3972;
of 1881, I claim the insertion of washers between the baffle plate and its stiffening
bars as and for the purpose described and as shown in Figures 3 and 4.
2
:
Dated this 24th day of April 180x