Improvements in Furnaces.
Year: 1890

page_text: Date of Application, 2nd June, 1890
Complete Specification Left, 27th Feb., 1891-Accepted, 11th Apr., 1891
PROVISIONAL SPECIFICATION.
Improvements in Furnaces.
I, EDWIN FAULKNER PADDON, of 36, Walbrook, in the City of London, Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
My present invention relates more especially to further improvements in my
invention for which applied for Letters Patent dated March 6th, A.D. 1890,
numbered 3591, for "Improvements in Furnaces."
In the Specification and drawing accompanying the same of my said former
Letters Patent, I described and shewed a plate upon which the fuel is supplied
through the fire door, such plate having through the front or inner part of it,
which is preferably made to incline slightly down towards the firebars, a number
of holes or perforations through which air is admitted from below. At or near
the front or inner edge of such perforated part of the plate an angled plate or
feather is made inclining down and outward toward the front of the furnace.
By my present invention, instead of a number of holes or perforations as described
in my said former Letters Patent, I use a transverse opening or air space extending
across and through the front of the deadplate. I do not make such opening or air
space straight but I make its two opposite edges notched, the projecting parts
between the notches in the front edge fitting in the notches in the back edge, and
nice sersa, but leaving a narrow continuous air space between their ends and sides,
and I make the projecting parts tapering at their lower ends so as to leave freer.
space below for the admission of air.
The opening made as described through the dead plate resembles in shape and
character the space between two of the moveable firebars described and shewn in
the Specification of Letters Patent granted to James George Galley, dated
August 23rd, A.D. 1881, and numbered 3663, and instead of making the opening
or air space through the dead plate as described, a separate bar made as described
in the Specification of James George Galley may be arranged and fixed by bolts
or other convenient means to the front edge of the dead plate the projections and
recesses in the bar and in the plate fitting into one another as already described.
The inner edge of the bar may be without projections and notches.
Behind the continuous notched opening described, and at a sufficient distance
from the latter, a second similar opening may be made in the same way through
the dead plate, or instead of two, three or any desired number of such openings
may be made.
On the inner side in front of each such transverse opening through the dead
plate, an angled plate or feather is formed or fixed inclining down and outward
towards the front of the furnace, as described and shewn in the Specification of my
Letters Patent No. 3591 A.D. 1890, already referred to.
I prefer however that instead of inclining at once outward as therein shewn,
the plate or feather shall first descend for a short distance vertically so as to
resemble in section the firebars described and shewn in the Specification of James
George Galley. Or the inclined plate or feather may be curved instead of angled.
The improved dead plate which forms the subject of any present invention may
be used with longitudinal firebars of any of the ordinary kinds, or with transverse
rocking or other firebars of the kind described in the Specification of the said
James George Galley, or of other kinds, and it may be made in one piece or in
two or more parts as may be convenient.
Across the front or inner edge of the deadplate I make a continuous transverse
shallow rib triangular in cross section the apex being uppermost and projecting for
a short distance above the level of the deadplate. This shallow rib serves as a

page_text: guide to the attendant in supplying fuel, as it is necessary that the latter should
be pushed forward beyond the rib in order to prevent the possibility of the air
openings or passages being stopped. At the same time the shallow triangular
section of the rib prevents it from catching or preventing the free movement of the
implements used in firing.
Instead of being continuous the rib described may have angular or other notches
or spaces formed in its length.
The projections or notches which form the transverse openings or passages for
air through the dead plate as described instead of being made angular, may be
rounded at their corners so that the shape of the opening is more or less undulating
or waving in plan. Or other shapes may be adopted.
The depth of the inclined angled plates may be varied, those near the front or
door of the furnace being of less depth than those at the inner end of the dead
plate.
The outer edges of the transverse air openings may be provided with inclined
shields or plates projecting inwards which serve to direct the currents of air
inward, and to lessen the liability of pieces of coal getting into the openings.
Inclined guides may be fixed at a sufficient distance apart to the front edge
of these shields so as to prevent the firing implements from catching in them when
being withdrawn.
The number and shape of the openings, and the shape, proportions, and method
of arrangement of the several parts, may be varied more or less as may be found
convenient, to suit different circumstances.
My present invention may be applied to furnaces of all kinds, and more especially
to the furnaces of steam boilers, and by its use perfect combustion of the coal or
other fuel is promoted, and the production of smoke prevented.
Datad this 2nd day of Jawe 1990
EDWARDS & Co.,
35, Southampton Buildings, Chancery Lane, London,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Furnaces.
I, EDWIN FAULKNER PADDON, of 36, Walbrook, in the City of London, Civil
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 and accompanying drawing, that is to say :-
My present invention relates more especially to further improvements in my
invention for which obtained Letters Patent dated March 6th A.D. 1890, and
mumbered 3591, for "Improvements in Furnaces."
In the Specification and drawing accompanying the same of my said former
Letters Patent, I described and shewed a plate upon which the fuel is supplied
through the fire door, such plate having through the front or inner part of it, which
is preferably made to incline slightly down towards the fire bars, a number of holes
or perforations through which air is admitted from below. At or near the front or
inner edge of such perforated part of the plate an angled plate or feather is made
inclining down and outward toward the front of the furnace.
By my present invention, instead of a number of holes or perforations as described
in my said former Letters Patent, I use a transverse opening or air space extending
across and through the front of the dead plate. I do not make such opening or
air space straight but I make its two opposite edges notched, the projecting parts
between the notches in the front edge fitting into the notches in the back edge, and
vice versa, but leaving a narrow continuous air space between their ends and sides,
and I make the projecting parts tapering at their lower ends so as to leave freer
space below for the admission of air.

page_text: The opening made as described through the dead plate resembles in shape and ·
character the space between two of the moveable firebars described and shewn in
the Specification of Letters Patent granted to James George Galley, dated
August 23rd A.D. 1881, and numbered 3663, and instead of making the opening
or air space through the dead plate as described, a separate bar made as described
in the said Specification of James George Galley, may be arranged and fixed by
bolts or other convenient means to the front edge of the dead plate the projections.
and recesses in the bar and in the plate fitting into one another as already
described. Allowance may be made for expansion by heat.
The inner edge of the bar may be without projections and notches.
Behind the continuous notched opening described, and at a sufficient distance
from the latter, a second similar opening may be made in the same way through
the dead plate, or instead of two, three or any desired number of such openings
may be made.
The accompanying drawing is in illustration of my present invention.
Figure 1 is a longitudinal section through the dead plate shewing firebars of the
ordinary kind.
Figure 2 is a plan of the same and
Figure 3 is a section upon a larger scale.
a, a', are the transverse notched or serrated openings across the dead plate b.
On the inner side in front of each transverse opening a a' through the dead plate
an angled plate or feather ce is formed or fixed inclining downward and outward
towards the front of the furnace, as described and shewn in the Specification of
ny Letters Patent No. 3591 A.D. 1890 already referred to. I prefer however
that instead of making at once inclining as therein shewn the plate or feather
shall first descend for a short distance vertically as shewn so as to resemble in
section the firebars described and shewn in the Specification of James George
Galley. Or the inclined plate or feather may be curved instead of angled.
In Figure 1 the angled plates c c' are shewn forming an integral part of the dead
plate, whilst in Figure 3 they are shewn separate and may be attached to the
bottom of the dead plate by flanges and screws or bolts.
The improved dead plate which forms the subject of my present invention may
be used with longitudinal firebars of any of the ordinary kinds as shewn in the
drawing, or with transverse rocking or other firebars of the kind described in the
said Specification of James George Galley, or of other kinds, and it may be made
in one piece or in two or more parts as may be convenient.
Across the front or inner edge of the dead plate I make a continuous transverse
shallow rib e triangular in cross section the apex being uppermost and projecting for
a short distance above the level of the dead plate b. This shallow rib serves as a
guide to the attendant in supplying fuel, as it is necessary that the latter should be
pushed forward beyond the rib e in order to prevent the possibility of the air
openings or passages a a' being stopped. At the same time the shallow triangular
section of the rib e prevents it from catching or preventing the free movement of
the implements used in firing. Instead of being continuous the rib described may
have angular or other notches or spaces formed in its length.
The projections and notches which form the transverse openings or passages a a¹
for air through the dead plate as described and shewn instead of being made
angular, may be rounded at their corners so that the shape of the opening is more
or less undulating or waving in plan. Or other shapes may be adopted.
C
The
depth of the inclined angled plates cc' may be varied, those c' near the front or
door of the furnace being of less depth than those c at the inner end of the dead
plate.
The inclined plates may turn upon pivots at their ends, and be connected to a
bar or handle, so that their angle may be varied, or they may be raised sufficiently
to close the openings in the dead plate altogether.
The outer edges or those nearest to the door of the furnace, of the transverse
air openings a a' may be provided with inclined shields or plates projecting

page_text: inwards, which serve to direct the current of air inward, and to lessen the liability
of pieces of coal getting into the openings.
Inclined guides may he fixed at a sufficient distance apart to the front edge of
these shields so as to prevent the firing implements from catching in them when
being withdrawn.
The number and shape of the openings a a¹ and the shape, proportions, and
method of arrangement of the several parts may be varied more or less as may be
found convenient, to suit different circumstances.
My present invention may be applied to furnaces of all kinds, and more
especially to the furnaces of steam boilers, and by its use perfect combustion of the
coal or other fuel is promoted, and the production of smoke prevented, whilst the
apparatus is simple, cheap, and not likely to get out of order.
Having now particularly described and ascertained the nature of my said inven-
tion, and the manner in which the same is to be performed, I declare that what I
claim is:-
1. The air spaces or channels a a', having their sides notched or serrated to
receive corresponding projections upon their opposite sides, the air space being
left between them, substantially as described and shewn.
2. The air spaces or channels through the dead plate of a furnace, having their
opposite sides curved or undulating, substantially as described.
3. In combination with the notched or undulating air spaces or channels a a',
the angled or curved plates e c', substantially as described and shewn.
4. In combination with the air spaces or channels a a', the triangular rib or
bar e, substantially as and for the purpose described and shewn.
5. In combination with the air spaces or channels a a', inclined shields or plates
at their outer edges, substantially as and for the purpose described.
Dated this 26th day of February 1891.
EDWARDS & Co.,
35, Southampton Buildings, London, Agents for the Applicant.