Improvements in or Additions to Steam-boller and other Furnaces.
Year: 1891

page_text: Date of Application, 27th Aug., 1891
Complete Specification Left, 27th May, 1882-Accepted, 2nd July, 1892
PROVISIONAL SPECIFICATION.
Improvements in or Additions to Steam-boller and other Furnaces.
We LOUISA WALKER of 8 Villa Road Handsworth in the County of Stafford
and HENRY WALKER of the above named address Combustion Engineer do heraby
declare the nature of this invention to be as follows :-
This invention relates to means for promoting combustion in steam boilers and
other furnaces, and is in part an improvement upon Letters Patent granted to
Thomas Walker, one of the present applicants and bearing date the 26th day of
May 1887 and Nod 7628.
'
This invention relates primarily, to the construction and formation of the doors
of steam boiler and other furnaces, including locomotive. Secondly, to the arrange-
ment of a combined baffle and regenerative smoke-burner, or combustion promoter.
Thirdly, in means for supplying air for promoting combustion to the said regenerative
smoke-burner.
The principle object of my said invention in the first place is to heat the air
supplied to the burning fuel, prior to its introduction to the furnace; in the second
place to properly distribute and utilize the whole of the air supplied, hence the
production of carbonic-oxide, and thereby the suppression of smoke, and efficient
combustion of solid fuel
In carrying out one form of my invention of the first part, I make the door
hollow, or of the form of a shallow box, or enclosed tray, with a partition located
up its middle, and coming within a short distance of the inside of an enclosed top.
The lower part of the partition, has a forwardly directed flauge, which encloses
the lower front part, or front space part, of the hollow door, wherethrough air as
hereinafter described circuitously circulates, while the front and back lower parts
of the outer walls of the shell of the door is open, the former to the outside of the
furnace, and wherethrough air inwardly passes and takes a circuitous course in a
winding manner, first up the outer passage then over the top of the septum or
partition plate, then down the inner passage and from thence to the fire place over
the dead plate, by an outlet preferably mouthed or expanded or provided with a
bell shaped outlet, so as to properly distribute the air heated by the passing of it
through the door as aforesaid.
-
By employing doors of a circulating construction as described the air supplied to
a furnace becomes highly heated on entering the game, lience perfect combustion of
the solid fuel, by the formation of carbonic-oxide, by the proper supply and
distribution of heated air; the said arrangement also prevents the formation of
smoke, and carbonic acid.
The door can be hung from the top in a swinging manner or may be hung hinge-
wise upon the side; and further the lower front part of the shell of the door is
preferably pierced with holes instead of having an opening for the ingress of air.
My invention of the second part, consists in arranging obliquely upwards from
the back of the furnace, or from the tube-plate of the fire box of a locomotive
boiler, a burner, consisting essentially of a perforated and partitioned off slab, with
truncated or other air outlets which latter are directed forwardly and supply heated
air to the products of combustion passing or issuing over the front of the slab
which acts as a baffle as well as a heat regenerator.
The baffle part of the appliance is hollow and alike unto a double arch enclosed
at its ends and having an air space between the inner and outside parts, and upon
this hollow structure which is a receiving chamber for the air the combustion burner
or burners come.
My invention of the third part, consists in making the inlet to the combined.

page_text: baffle and regenerative-air-burner, through the sides of the furnace, or through both
the sides of furnace and boiler.
The said entrances are simple passages which lead to the two opposite sides of
the perforated slab as aforesaid, and hence the supplying of air to be heated which
after circulating is delivered through the truncated or other parts of the regenera-
tive burner as aforesaid.
יוגי.
ocal 1
2
1001
LOUISA
WALKER and
HENRY WALKER,
By Henry Skerrett,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in or Additions to Steam-boiler and other Furnaces.
We, LOUISA WALKER of 8 Villa Road Handsworth, in the County of Stafford,
and HENRY WALKER of the above named address, Combustion 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:
This invention relates to means, for promoting combustion in steam boiler and
other furnaces,, and is in part an improvement upon Letters Patent granted to me
and bearing date the 26th day of May 1887 and Nod 7628.
This invention relates primarily, to the construction, and formation of the doors
of steam boiler and other furnaces, including locomotives. Secondly, to the arrange-
ment of a combined baffle, and regenerative smoke burner, or combustion promoter,
Thirdly, in means for supplying air for promoting combustion to the said regenera-
tive smoke burner.
The principal object of my said invention in the first place, is to heat the air
supplied to the burning fuel, prior to its introduction into the furnace; in the
second place, to properly distribute, and utilize the whole of the air supplied,
hence the production of carbonic-oxide, and thereby the suppression of smoke, and
efficient combustion of solid fuel.
In carrying out one form of my invention of the first part, I make the door
hollow, or of the form of a shallow box or enclosed tray, with a partition located
up its middle, and coming within a short distance of the inside of an enclosed top.
The lower part of the partition, has a forwardly directed flange, which encloses
the lower front part, or front space part, of the hollow door, wherethrough air
as hereinafter described, circuitously circulates, while the front and back lower
parts of the outer walls of the shell of the door, is open, the former to the outside
of the furnace, and wherethrough air inwardly passes, and takes a circuitous course,
in a winding manner, first up the outer passage, then over the top of the septum
or partition plate, then down the inner passage, and from thence to the fire place
over the dead plate, by an outlet preferably mouthed or expanded, or otherwise
provided with a bell shaped outlet, so as to properly distribute the air heated,
by the passing of it through the door, as aforesaid.
By employing doors of a circulating construction as described, the air supplied
to a furnace becomes highly heated on entering the same, hence perfect combustion
of the solid fuel, by the formation of carbonic oxide by the proper supply, and
distribution of heated air; the said arrangement also prevents the formation of
smoke, and carbonic acid.
The door can be hung from the top in a swinging manner, or may be hung binge
wise upon the side; and further, the lower front part of the shell of the door is
preferably pierced with holes, instead of having an opening for the ingress of air.
My invention of the second part, consists in arranging obliquely upwards from
the back of the furuace, or from the tube plate of the fire box of a locomotive

page_text: boiler, a burner, consisting essentially of a perforated and partitioned-off slab, with
air flues or air inlets. and outlets, adapted to supply air to the products of com-
bustion passing or issuing over the front of the said slab, which acts as a baffle, as
well as a heat regenerator.
My invention of the third part, consists in making the inlet to the combined
baffle and regenerative air burner through the sides of the furnace, or through both
the sides of furnace and boiler.
The said entrances, are simply passages which lead to the two opposite sides of
the perforated slab as aforesaid and hence the supplying of air to be heated, which
after circulating is delivered through the truncated or other parts of the regenerative
burner as aforesaid.
Figure 1 of the accompanying drawings represents in front elevation, a furnace
door, constructed, arranged and provided according to one part of my invention.
Figure 2 represents a transverse vertical section of the same, upon the dotted
lines A. B. Figure 1, showing how air which is supplied to the furnace, is compelled
to make a circuitous course, through flue-like passages, which renders the said door
hollow or semi-enclosed.
Figure 3 represents a cross section on the dotted lines C. D. Figure 1, showing
the flue or hollow character of the said door.
Figure 4 represents a steam boiler furnace, provided with a hollow and air
circulating door, constructed according to my invention.
Figure 4 represents a modification of a door, with inlets of ascending passage
made through the bottom of the said passage and through the dead plate, instead of
through the bottom of the outer wall, so that when the door is closed, the holes in
the bottom of the ascending passage, are coincident with the holes or openings in
the dead plate.
In Figures 1 to 4^, a is a furnace door, comprehending a hollow interior,
separated up its middle, to near the upper inside part, by a partition wall b, running
Dearly the whole length of the interior of the said hollow part of the door. c is an
outside wall, pierced at its lower part with holes c³, and connected at its lower
part to the lower extremnity of the partition b, whilst the upper end of the said
front is connected to a back wall, by a top e', whilst the said outside walls, are
connected by ends c³, c. The air space between the outside wall, and the middle
partition is marked e, and preferably tapers inwardly towards the upper cud, and
with the lower part of the said air passage, open to the atmosphere through. the
holes or piercings c³.
fis an inward air passage, with a mouthed outlet f, and a communicating
passage, leading from channel e, to channel f, and over the top and middle
partition as a bridge.
Thus air supplied to the furnace g, first passes through the outside air holes or
piercings, then ascends up the air passage e, over the partition b, and then descends
down the passage f, and makes its exit through the truncated and mouthed outlet f³,
to the burning fuel.
By employing doors of a circulating construction as described,' air supplied to
the furnace becomes highly heated, as the same has to pass' principally through the
door, for promoting the necessary combustion.
It is understood that the said door becomes highly heated by contact with the
fire.
The said hollow or air circulating door, can be hung upon a pivot h, or may be
hung, supported, or connected in any desired way.
The door may be provided if necessary with transverse tie rods or stays, to keep.
the parts in their respective positions.
It is understood that my new or improved air circulating door can be applied to
all furnaces for the combustion of fuel..
- f
Figure 6 represents a locomotive boiler furnace, arranged and provided with
improvements, made in accordance with the second part of my invention, by means.

page_text: .
K
of which, air, before entering a furnace, becomes highly heated, by entering tho
said furnace, through the medium of heated flues or passages.
h, is a baffle, composed of brickwork, and directed obliquely upwards from the
back of the furnace, or from the back of the tube plate of the fire box, of a
locomotive furnace, as represented.
This baffle part, is of an arch figure, aud with the upper part formed into a hollow
structure, and constituting the burner, from which heated air is supplied for
promoting combustion in the furnace. This said burner part is marked i, and
consists of hollow pinacles, having side piercings, and middle (and cross)
partitions, and with passages i, coming upon the two opposite sides of the said
partitions, and with the said passages directed, or leading from, main trunk inlets j,
to which air entors from the outside by vertical air flues k, having truncated ends
at
Thus, the products of combustion, passing or issuing over the front of the said
slab or baffle, are supplied with highly heated air, hence perfect combustion.
The said combined baffle and regenerator is applicable to the promotion of
combustion in fuel burning furnaces generally.
In the adaption to the locomotive furnace Figure 5, l'is the boiler, m the fire
box, n the fire bars, and o the ash pit.
Figure 6 represents another form of furnace constructed according to the third
part of my invention, and which, said furnace, is adapted to the heating of muffles
or annealing pots.
m is the furunce grate, the fire bars, and the ash pit; p a well or chamber
above the furnace grate, enclosed at top by a slab p', and having near the said slab,
through the walls p, a flue outlet is an annealing pot, supported upon a
brick floor g, made archwise over the fire place.
The said pot is surrounded by an annular space p³, whilst p², are passages,
whereupon products of combustion from the fire place pass, and are from thence
conveyed to combustion chambers supplied with heated air from the burners,
leading from air passages or channels, having entrances 10, from the ash pit,
below the fire bars.
The entrances to the passages p, are expanded at ", so as to collect the uncon-
sumed products of combustion from the fire place, and convey the same into the
combustion chambers, and as the same intermingles with the air supplied to the
combustion chambers, the mixture thus brought together bursts into flame.
This construction of furnace is applicable to the generation of steam, to the
heating of metals, and for other purposes.
Figure 7 is a horizontal section upon the dotted lines E F. Figure 6, whilst
Figure 8 is a front view of the combustion chamber, and one of the burners at the
back of it, upon an enlarged scale.
In the working of the furnaces jets or blasts of air may be employed to promote
more fierce combustion, or I employ injects of steam, or instead of jets of air 'or
steam, I may employ the aforesaid combined.
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 :-
First: A hollow and air circulating furnace door, whereby air required to be
supplied to the furnace, becomes highly heated, by the same taking a circuitous
course through the passages thereof.
Secondly-In a hollow door, consisting of a flat box-like shell, with a partition
up its middle, coming within a short distance of its 'top, and with the outlet of the
descending passage made truncated, and with the inlet of the ascending passage
provided with holes and piercings, as described and set forth in Figures 1 to 4^.
ThirdlyTn a 'coinbined baffle and heat regenerator, substantially as 'set forth
-in Figure 5.

page_text: Fourthly In a fire place for promoting and increasing combustion, the general
construction and arrangement of the parts as described and set forth in Figure 5.
Fifthly-In fire places or furnaces, the general construction and arrangement
of the air and products of combustion passage or passages, with a burner or burners,
and a combustion chamber or chambers as set forth in Figure 6.
Dioon 2
1000ר
LOUISA WALKER,
HENRY WALKER,
By Henry Skerrett,
6, Livery Street, Birmingham, Agent for Applicants.