IMPROVED APPLIANCES FOR THE CONSUMPTION OF SMOKE AND THE ECONOMIZING OF FUEL IN STEAM BOILER AND OTHER FURNACES
Year: 1868

page_text: LETTERS PATENT to Joseph Roberts Stoney, of Leeds, in the County
of York, Engineer, for the Invention of "IMPROVED APPLIANCES
FOR THE CONSUMPTION OF SMOKE AND THE ECONOMIZING OF FUEL IN STEAM
BOILER AND OTHER FURNACES."
Sealed the 7th August 1868, and dated the 11th February 1868.
PROVISIONAL SPECIFICATION left by the said Joseph Roberts Stoney
at the Office of the Commissioners of Patents, with his Petition,
on the 11th February 1868.
I, JOSEPH ROBERTS STONEY, of Leeds, in the County of York,
Engineer, do hereby declare the nature of the said Invention for
"IMPROVED APPLIANCES FOR THE CONSUMPTION OF SMOKE, AND THE ECONOMIZING
OF FUEL IN STEAM BOILER AND OTHER FURNACES," to be as follows:-
The object of my Invention are the more perfect combustion of
smoke and the greater economizing of fuel in furnaces, more especially
in steam boiler furnaces. Taking, for example, an ordinary internal
flued boiler, I use a double bridge, a moderate space, say of eighteen
or twenty-for inches intervening, and I admit air to such space by
means of ordinary trap doors in the front bridge. Over the two bridges
I mount a "saddle" of baked clay or fire-brick (made for convenience

page_text: in halves) causing the upper portion to fit the flue at the ends, but
being hollowed out in the centre and communicating at the sides with
the air space between the two bridges. Throughout the length also
of the "saddle" runs an internal flue in the form of a quadrant at the
ends, but having internally a serpentine or saddle formation. From
this flue downwards to the bottom of the "saddle" are air commu-
nications with the space between the bridges, and also from it are air
communications upwards with the centre hollow before referred to.
The operation of this arrangement is that the flame passing from the
fire through the saddle flue mingles with air received from the down-
ward communications with the space between the bridges as well as
with air from the same space which passes between the external centre
of the saddle and the fluc, and descends the upward communication.
The smoke is thus better consumed and fuel economized.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Joseph Roberts Stoney in the Great Seal Patent
Office on the 11th August 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
ROBERTS STONEY, of Leeds, in the County of York, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eleventh day of February, in the year of
our Lord One thousand eight hundred and sixty-eight, in the thirty-first
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Joseph Roberts Stoney, Her special licence
that I, the said Joseph Roberts Stoncy, my executors, administrators,
and assigns, or such others as I, the said Joseph Roberts Stoney, my
executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVED APPLIANCES
FOR THE CONSUMPTION OF SMOKE, AND THE ECONOMIZING OP FUEL IN STEAM
BOILER AND OTHER FURNACES," upon the condition (amongst others) that
I, the said Joseph Roberts Stoney, my executors or administrators, by

page_text: an instrument in writing under my, or their, or one of their hands
and seals, should particularly describe and ascertain the nature of the
said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Joseph Roberts Stoney, do hereby.
declare the nature of the said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained
in and by the following statement thereof, that is to say :-
The objects of my Invention are the more perfect combustion of
smoke and the greater economizing of fuel in furnaces, more especially
in steam boiler furnaces. Taking, for example, an ordinary internal
flued boiler, I use a double bridge, a moderate space, say, of eighteen
or twenty-four inches more or less intervening, and I admit air to such
space by means of an ordinary trapdoor or doors in the front bridge.
Over the two bridges I mount a saddle of "baked" clay or fire-brick
(made for convenience in halves) causing the upper portion to fit the
flue at the ends (allowance being made for expansion), but being
hollowed out in the centre and communicating at the sides with the
air space between the two bridges. Throughout the length also of the
"saddle" runs an internal fluc in the form of a quadrant at the ends,
but having internally a serpentine or saddle formation. From this flue
downwards to the bottom of the "saddle" are air communications with
the space between the bridges, and also from it are air communications
upwards with the centre hollow before referred to. The operation of
this arrangement is that the flame passing from the fire through the
"saddle" flue mingles with air received from the downward commu-
nications with the space between the bridges as well as with air from
the same space which passes between the external centre of the saddle
and the flue and descends the upward communication. An alternative
arrangement consists in placing the "saddle upon a double bridge
placed at a suitable distance behind the ordinary bridge, and thus
creating another vertical air passage. in addition to those previously
obtained. A trapdoor in the front bridge for the admission of air is
also used. I generally prefer however to admit the air by means of a
swing box door (operated upon by an arrangement afterwards explained)
by means of which the air supply is graduated.
"

page_text: Figure 1 is a vertical section of my first-named arrangement, and
Figure 2 of the alternative plan, Figure 3 being an enlarged plan
view of the swing air door arrangement.
Letter A (Figure 1) shews the saddle in section with air pas-
sages a, a, a letter 6 indicates the serpentine passage through it;
letter a¹ shews the hollow referred to in the centre of but outside the
saddle, and which passing round the same communicates with the air
space B between the two bridges C, C, upon which the saddle A rests;
letter c denotes the space allowed for the expansion of the saddle;
letter d is one of the bearings of the swing door (more particularly
referred to in the description of Figure 2), and e is a door placed at
the back of the second bridge to facilitate flue cleaning. The arrows
indicate the direction of the air draught, the smoke from the furnace
mingling on its passage through the saddle with the upcast and
downcast shafts or air passages a, a, a, fed from the intermediate
chamber B, it in turn receiving its air supply through the door which
swings on the bearings d. Figure 2 shews my alternative plan in which
it will be seen that the double bridge A, A, is placed behind the ordinary
bridge B with an air space C intervening. The shape of the saddle D
is somewhat different to that of the one previously shown, having no
external centre air passage, and being made wider in the mouth so as
more effectually to catch the flame and smoke. Letter E denotes the
swing box door referred to fitted at one end with two angular feathers
e, e, at opposite points. This box is divided horizontally at the centre
into two compartments communicating with each other, and it is partially
filled with sand; F is a slotted rod, one end of which is borne by a
bracket in the bridge support, whilst a stud from the fire-hole
door catches the other end (not shown). Within the slot a notched
lever g (see Figure 3) is free to play upon a stud 9. Upon the rod F
being drawn out a certain distance by the opening of the fire-door and
the consequent action of the stud affixed thereto upon the outer end of
the rod F, the lever is simultaneously drawn back and tbrown slightly
inwards by the angularity of the inside of the bearing bracket h. This

page_text: motion throws the notch part of the lever g opposite the feather e, and.
when the fire-door is closed it presses against it and throws the box
into the position shown in dotted line (Figure 2). The swing door E
is now wide open and the sand begins to percolate from that which was
the lower compartment to that which now is, and so gradually to close
and cut off the air supply. In this as in the previous case the arrows.
indicate the direction of the air currents, showing where they mingle with
the flame and smoke.. In other respects the arrangements are similar..
Having now fully described the nature of my Invention, and in
what manner the same may be performed, I wish it to be understood
that what I claim is,-
Firstly. The use of baked clay or fire-brick saddles for the more
effectual combustion of smoke, constructed substantially as shown and
described, without confining myself to the precise details shewn..
Secondly. The arrangement of such saddles in furnaces on a doublo
bridge, or placed behind the ordinary bridge, as shown and described.
Thirdly. The swing sand box door arrangement for the admission of
air, substantially as shewn and described.
And, lastly. The whole combined arrangement, as shewn and described,
for the purposes named in my title..
In witness whereof, I, the said Joseph Roberts Stoney, have
hereunto set my hand and seal, this Tenth day of August, in
the year of our Lord One thousand eight hundred and sixty-
eight.
Witness,
PHILIP H. SHARP,
Patent Agent,
Leeds.
JOSEPH ROBERTS STONEY. (L.S.)