Improvements in Steam Generator Furnaces.
Year: 1892

page_text: Date of Application, 13th Aug., 1892
Complete Specification Left, 10th May, 1893-Accepted, 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in Steam Generator Furnaces.
I, GILES HOLDING Mechanic 24 Ingleby Street, Brownroyd Bradford Yorkshire,
do hereby declare the nature of this invention to be as follows:-
The furnace bar nearest the front dead plate, is a channelled bar, with an air
course the whole length of the bar, to admit cool air coming through holes in the
dead plate; also from the ash-pit, therefore it has a large area of cooling surface;
the bar is crooked, and has an aperture in the inclined portion, to admit air to the
underside of the fuel. Thereby heated air is supplied to the fuel from inside the
bar, in addition to the supply on either side as usual.
The second furnace bar is tubular, with an air space throughout the whole length
of the bar, it also has a branch or opening in the underside, to admit air from the
ash-pit, in addition to air received from end of the first bar. The end of second bar
can terminate either straight, or bent upward.
1st. If bent upward, it extends under the bridge, and face of bar, is in a line with
front of bridge, one side of bar is shorter than the opposite side, thereby there is a
space for heated air to escape from inside the bar, to fuel on surface of bars, at the
back end of furnace.
2nd. If the second bar is straight, it terminates in front of bridge, delivering
heated air into the ash-box.
Above the ash-box is a cellular metal box, bolted to the dead plate which supports
the bridge through spaces in this box, heated air rises from ash-box, to fuel at
back end of furnace, causing a white flame, and consumes all the gases arising from
fuel in the furnace.
Fig. 1 is a longitudinal section of furnace bars, bridge, and arch.
Fig. 2, is a plan of furnace bars A and C.
Fig. 3, is elevation of furnace bars A and C.
Fig. 4, is end elevation of furnace bent bar C.
Fig. 5, is section of straight bar C, and cellular metal box. K.
Fig. 6, is sectional plan of part of cellular box K, and dead plate M.
A is a crooked channelled bar, with an opening or aperture B through the
surface. Tubular bent bar C is open at ends D, D¹; and a branch or opening at E
for a supply of air from ash-pit F. At the end D', one side is shorter than the
opposite side as shewn at G, for escape of heated air to fuel on surface of bars.
his a circular bracket to sustain bridge j.
The bar c instead of being bent, can be straight and open as shewn at H, delivering
heated air into ash-box I, which rises through spaces in the cellular metal box K,
into the fuel on surface of furnace bars.
Dated this 12th day of August 1892.
GILES HOLDING,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Generator Furnaces.
I, GILES HOLDING, Mechanic, 24, Ingleby Street, Brownroyd, Bradford,
Yorkshire, 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 consists in a new construction and arrangement of fire-bars, fire-
bridge, and accessory parts, for increasing the heat by promoting the consumption
of the fuel products generated during combustion in steam generator furnaces.

page_text: Fig. 1 is a longitudinal section of a furnace constructed according to my invention,
and Fig. 2 is a sectional plan of same.
Fig. 3 is a front view of the front dead-plate.
Fig. 4 is a plan of one each of the furnace bars, Fig. 5 a longitudinal elevation,
and Fig. 6 an end view of same.
Fig. 7 shows, in sectional elevation, Fig. 8 in plan, partly in section on the
line x, y, and Fig. 9 in detail view, a modification of the invention.
I employ two sets of furnace bars, each set differing in construction. The furnace
bars A nearest the front dead-plate B are channelled, being so fashioned to provide
an air course for the whole of their length. The cool air admitted through two or
more holes a* in the dead-plate and also from the open front of the ash-pit tranverses
the channels of the bars A. The said bars A are inclined downwards, a short
distance, from the dead-plate B, and are each provided with an aperture a through|
which air passes to the fuel above, in addition to the air which passes in between
the bars. The furnace bars C are made hollow or tubular, with an air space
traversing their whole length, and an opening at each end; and each contains an
orifice D, in the underside of same, to admit air from the ash-pit, in addition to the
air which traverses through each such bar C from each bar A. The ends of these
bars C nearest the fire-bridge E are curved, and terminate under the top part of
such fire-bridge, and the lower portion of these ends at the curved part is open to
allow the heated air to escape and pass along at the back of the furnace between
the bars to the fuel on such bars, as indicated by the arrows in Fig. 1. The fire-
bridge E is partly supported by the curved metal bracket F, which latter, together
with the dead-plate H (which supports one end of the bars C) is made fast, by
partly embedding same in the fire-brick m. Figs. 4, 5, and 6 show in plan,
elevation, and end view respectively, one each of the bars A and C detached.
M is an arch of fire brick built up on the fire bricks m for the purpose of deflecting
the smoke so as to cause it to mix with the flames and become consumed thereby.
J is a swing door arranged below the back ends of the fire-bars C so as to form a
chamber into which the air from such bars C may enter and become hotter before
passing up between the ends of said bars C and the fire-bridge E. A long rod K
is pivotted to this swing door J and has a handle in front to open such swing door
when it is desired to remove the ashes.
As a modification the ends of the bars C nearest the bridge E may, as shown in
Figs. 7 and 8, be fashioned straight and terminate in front of the bridge, in
which case I prefer to add a perforated metal box L, bolted to the dead-plate H
(see also front view Fig. 9) through the perforations 7 of which the hot air from the
bars C passes and rises up between the bracket F and the fire-bridge E, mixing with
the smoke and flames from the burning fuel at the back end of the furnace, causing
a white flame, and consuming the products of combustion.
In furnaces constructed according to my invention the fire-bars last much
longer than usual, and clinkering is reduced; the air reaches the fuel at the
points where it is most needed, and greater heat is produced from a given quantity
rf fuel than hitherto. As the flames rise higher than usual, I am enabled to place
the fire-bars proportionately lower in the fire-way and thereby gain a greater area
of heating surface.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1. The construction of the channelled fire-bars A having the air openings a
for the purposes described and substantially as specified and shown on the
drawings.
2. The construction of the hollow or tubular fire-bars C whether employed in
conjunction with the perforated metal box L or not for the purposes described and
substantially as specified and shown on the drawings.

page_text: 3. The construction of the perforated metal box L for the purposes specified and
substantially as described and shown.
4. The curved bracket F in combination with the fire-bridge E the arch M the
dead-plate H and the swinging door J for the purposes specified.
Dated this 9th day of May 1893.
GILES
HOLDING,
24, Ingleby Street, Brownroyd, Bradford, Applicant.