IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES
Year: 1884

page_text: I, WILLIAM GOODE, of 20 Red Lion Street, in the town and county of the
town of Nottingham, Engineer, do hereby declare the nature of my invention for
"IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES to be as follows:-
I construct each furnace of the following parts:-The furnace door towards the
top at the front is provided with a valve plate nearly the width of the door this
plate is hinged to the door in such a way that its weight alone will hold it either
open or closed as placed by the attendant, when closed it covers a horizontal slit in
the front of the door which is hollow, and has a slit in the back plate opposite the
front one, the two being separated by a central plate which projects from the
interior of the hollow door nearly to the bottom, so that when the valve plate is
open, air passes through the front slot, down between the front plate and central
plate under the bottom of the central plate then up between it and the back plate,
and through the slot in the back plate, being delivered up to the crown of the flue.
The bottom of the furnace door slides close on the top of the front dead plate,
which is hollow, the front of it lies close to the back of the furnace front, the back
of the dead plate forms a flange provided with vertical slots from end to end, the
right and left front corners of the top of the dead plate are perforated, and beyond
the perforations is an angular flange which is secured to the front of the furnace,
and meets the sides and crown of the flue, the angular flange has three or more
slots at equal distances, through which air passes to the sides and crown of the flue,
being admitted through a slot in the lower side of the dead plate, into the hollow
portion and out through the right and left corner perforations in the top of the
dead plate. Instead of the three or more slots in the angular flange before named
I may employ an angular flange without slots in which case I admit air to the
furnace through holes in the front of the furnace onto the non-slotted angular
flange down through the right and left corners of the top of the dead plate into the
hollow part and out through a slot near the back of the top of the dead plate which
is capable of being closed or opened by the attendant, in such case the slot in the
lower side of the dead plate is not employed. The slots in the flange at the back
of the dead plate are for the purpose of allowing dust and refuse to pass into the
ash pit, so as to always keep the front ends of the fire bars clear. The back dead
plate carrying the fire bridge has a horizontal plate the same height as the front
dead plate, and two plates on its lower side one at the back edge, and the other at

page_text: the front edge, each of which reach to the sides and bottom of the flue, thus forming
a chamber between them, the front plate near the top forms a flange provided with
vertical slots from end to end, which keep the back ends of the fire bars clear from
ash and refuse. Below the fire bars the front plate is provided with a door which
can be opened or closed by the attendant by means of a rod hinged to it, which
projects beyond the front of the furnace, the horizontal plate has two perforations
close to the back plate, between these perforations a double flanged arched bridge
is placed, the two flanges and arch enclosing three sides of the perforations, the
fourth side being formed by the sides of the flue, both flanges close on the sides
and top of the flue, but the front flange has horizontal perforations which face the
front of the furnace, in front of the arched bridge, on the dead plate, is a right
angled plate, the vertical side of which touches the sides of the flue, but leaves &
clear space between its top edge and the crown of the flue, through this space over
the plate, and down to and through the arch of the bridge, the products of com-
bustion pass to the flue,, which mixing with any air passing through the door in
the back dead plate, through the chamber and through the perforations in the front
flange of the bridge, bursts into flame, and entirely consumes any smoke that may
be formed. The fire bars which have their ends resting on the vertical slotted
flanges of the dead plates, are of a form not heretofore employed. Each bar
consisting of a vertical web thicker at the top than the bottom edge, which forms.
an alternately reversed curved line, from shoulder to shoulder, the thick top edge
is corrugated on each side reversely, each projection besides being formed gradually
narrower downwards, until it dies in the vertical-flange, it is'curved, towards the
front of the furnace, both at the top and bottom, such forms catch the air under the
bars and cause it to curl round so as to be projected towards the front of the furnace
as it passes, between the particles of fuel, each bar is provided with a projecting
stud on each shoulder on one side, being vertically grooved on the opposite side, the
web of each bar also carries studs, two, or more on each side according to, the length
of the bar, which serve, to keep them the proper distance apart, but does not prevent
a rake being passed from end to end of the bars on the upper edge to clear them of
clinkers or other refuse..
By such means I am enabled to construct a furnace which ensures perfect
combustion of all the gases produced by the consumption of the fuel and conse-
quently effects a saving in the cost, both of fuel and renewal of fire bars.
Dated this nineteenth day of July 1884:

page_text: "IMPROVEMENTS IN STEAM BOILER AND OTHER FURNACES," and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
DESCRIPTION OF THE DRAWINGS.
J
Figure 1 shows a plan of the front end of a steam boiler flue, without the front
plate and fire door with my improvements applied thereto.
Figure 2 a front view, and Figure 3 a longitudinal vertical section of the same.
Figures 4 and 5 are respectively a side view and plan of the improved fire bar
I employ in the furnace.
Like letters indicate corresponding parts throughout the Drawings.
I construct each furnace in the following manner.
The bottom of the furnace door which is of the usual construction, slides close on
the top of a front dead plate A which is hollow, the front of it lies close to the
back of the furnace front, the back of the dead plate forms a flange provided with
vertical slots A¹ from end to end, the right and left front corners of the hollow
dead plate have angular perforations, and beyond these perforations is an angular
flange B which is secured to the front of the furnace by screw bolts passed through
the front plate, and into the three tabs shown at Figures 1 and 2, the back edge of
the flange B meets the sides and crown of the flue, the flange has three or more
slots B¹ three only are shown in the drawings at equal distances through which air
passes to the sides and crown of the flue, being admitted through the angular
perforations in the hollow dead plate.
The slots A¹ in the flange at the back of the dead plate are for the purpose of
allowing dust and refuse to pass into the ash pit so as to always keep the front
ends of the fire bars, which rest upon it, clear; the front of the back dead plate
which carries the fire bridge, is also provided with a flange having vertical slots
like the front dead plate, (the back dead plate is not shown in the Drawings,)
upon which the back ends of the fire bars rest.
The fire bars are of a form not heretofore employed, one such fire bar is shown
in side view and plan at Figures 4 and 5.
Each bar consists of a vertical web C thicker at the top than the bottom edge,
which forms an alternately reversed curved line, shown by dotted lines at Figure 5,
from shoulder to shoulder, the thick top edge is reticulated on each side reversely,
each projection C¹ besides being formed gradually narrower downwards until it
dies in the vertical flange, is curved towards the front of the furnace both at the
top and bottom, such forms catch the air under the bars and cause it to curl round
so as to be projected towards the front of the furnace, as it passes between the
particles of fuel, each bar is provided with two or more projecting studs 0% on each
side according to the length of the bar, these studs serve to keep the bars the
proper distance apart, but does not prevent a rake being passed from end to end of

page_text: the bars, on the upper edge to clear them of clinkers, or other purpose, each bar is
also provided with a projecting recessed stud C³ on each shoulder on one side, and
is either vertically grooved on the opposite side or has a projecting stud C which
fits into the recessed stud C³ of the next adjacent bar..
By such means I am enabled to construct a furnace which ensures perfect
combustion of all the gases produced by the consumption of the fuel and con-
sequently effect a saving in the cost both of fuel and renewal of fire bars.
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
First. The hollow perforated dead plate with a slotted flange, substantially as
and for the purpose set forth.
Second. The angular slotted flange B substantially as and for the purpose set
forth.
-
Third. The curved, reticulated, and studded fire bars, substantially as and for
the purpose set forth and illustrated in the Drawings annexed..
.