Improvements in the Method of and Apparatus for the Consumption of Smoke in the Furnaces of Steam Boilers and the like.
Year: 1892

page_text: Date of Application, 29th July, 1892-Accepted, 3rd Sept., 1892
COMPLETE SPECIFICATION.
Improvements in the Method of and Apparatus for the Consumption
of Smoke in the Furnaces of Steam Boilers and the like.
We, HENRY GOWAN HUDSON, Manufacturer, WILLIAM MILNE RENNIE,
Mill Manager, and JESSE GRAHAM, Engineer, all of Springfield Mills, Morley in
the County of York, 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 has for its object, the more effectual consumption of smoke by
combining with the fire box or furnace an apparatus so constructed that, after
supplying the fire with fuel in the ordinary manner the necessary volumn of air is
admitted to the furnace for a predetermined time, for the consumption of the
smoke emitted from the fuel, and at the required time for the volumn of air
admitted to the fire to be reduced by the automatic action of the apparatus.
In describing our invention in detail reference is made to the accompanying
drawings in which
Fig. 1. represents the front view of a portion of a boiler fitted with our
improvement.
Fig. 2. is a plan of Fig. 1.
Fig. 3. is a detail of that part of the apparatus which automatically governs the
closing of the supplementary doors.
Fig. 4. a longitudinal section through a furnace or fire box.
Fig 5. a transverse section through a furnace or fire box on line a. b. and
Fig. 6. a transverse section through a furnace door.
The apparatus is shown as applied to a two flued boiler the furnace doors A.
and A have each an opening through the centre which are covered at a pre-
determined time after supplying the fire with fuel by supplementary doors B.
and B closed automatically.
The hinge pin C. of the door A. extends about half way down the door and is
secured to the door so that when opened or closed, the hinge piu C. is operated, the
supplementary door B. is attached to the bottom portion of hinge pin and is
unaffected on the closing of the door A.
Behind the bridge D. of each furnace is formed by preference, an arch E. of
brick or other refractory material supported by a plate F. upon which are laid a
number of tubes G. also of refractory material the tubes G. filling the space
between the said plate and brick arch lining E. or the furnace plate H. as the case
may be.
Steam is admitted into the space between the bridge D and tubes G. by
pipes J. in the manner as hereinafter described and by which an induced draught
is created, which may be augmented by steam jets in front of the fire.
To the hinge pin C. is secured a lever K. to which is connected a rod L.
supported in a suitable manner so that the rod may slide to and fro.
On opening the door A. the hinge pin C. and lever K. are operated thereby
causing the rod L. to slide some distance in the direction of arrow and a projecting
pin M. fixed to the said sliding rod to come in contact with the arm N. so that the
said arm and the vessels O and O' attached to the arm N¹ all supported by the
pin P. are tilted into the position shown by dotted lines.
By the rod L. sliding in the direction described, another pin Q. secured to the
said rod comes in contact with the lever R. attached to the plug of a tap in steam
pipe J' thereby operating the lever and opening the tap, by which steam is allowed
to flow through the cylinders S. pipes J. and through jets into the lower tubes G.

page_text: behind the bridge D. thus creating an induced draught. The lever R. is held in
the position for keeping the tap open, by the end of said lever engaging with a
catch bar T. supported on a fulcrum pin or bar I.. On opening or closing the
doors A and B the sliding rod L. is unaffected, but on closing the door A. the
sliding rod L. is moved in the opposite direction to that before described, when a
support Q. on the said bar sliding under the arm N¹ raises the vessels to the
position shown by detail Fig. 3. the supplementary doors B. and B¹ remaining open
until automatically closed in the manner as hereinafter described.
A
The arms N and N₁ are attached to a pipe U. provided with a regulating tap V.
and at each end of the said pipe is secured a vessel, O at one end and Oat the
other, which are also connected by another pipe W. in the manner shown.
quantity of oil, mercury or other suitable fluid is placed in one of the vessels which
flows from one vessel to the other on the operation of the arms N and N¹ by the
motion of the sliding rod L.
When the doors are closed as shown by Fig. 1. the oil or other fluid is in the
vessel O' but on opening the doors A and B. the vessels and pipes are tipped in
the opposite direction as shown by dotted lines in Fig. 1. thus bringing the
vessel O. lower than O' by which means the fluid in the former runs into the latter
through the pipe W. thus making the end at O. heavier.
On closing the door A. the supplementary door B. remains open but the sliding
rod L. will be operated in the opposite direction to that shown by the arrow, and
the vessels and O' moved into the position shown by Fig. 3 by means of the
support Qsliding under the arm N' thus raising the vessels. The liquid in the
vessel O. will then flow back into O' through pipe U. and regulating tap V. and
when the surface of the liquid in the two vessels is about level, the end at O' which
is slightly heavier will cause the apparatus to tipple into the position shown by
Fig. 1. and in its descent a projection from the pipe U. will strike the catch bar T.
and thereby release the lever R. which is then moved in the direction for closing
the tap by the contraction of the spiral spring X. thus stopping the supply of
steam flowing through pipes J.
So long as steam is Howing through the pipes J. the pistons in the respective
cylinders S. are kept at the outer end of the cylinders S. but immediately the
supply of steam is stopped, the tension of the spiral springs Y attached to the
respective levers Z. and connecting rods and the latter to pins beneath the grate
bars, will cause the pistons to move towards each other, thus causing the supple-
mentary doors B and B to close, thereby stopping the supply of air through the
door opening to the respective fires; the air then required for consumption passes
through the grate openings in the usual manner.
To the inside of each door A and A¹ we attach an adjustable plate P¹ by which
the air entering the furnace through the door opening, is deflected on to the fire,
which in conjunction with the refractory arch E and tubes G. causes the gases as
they leave the fuel to be ignited and thereby prevent the formation of smoke.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what
we claim is :-
1. The general arrangement and combination of parts constituting the complete
apparatus for preventing the formation of smoke, arranged and operated sub-
stantially in the manner shown and as herein before described.
2. Furnaces provided with double doors combined with a sliding rod L. vessels O
and O cylinders S and pipes J. all arranged substantially in the manner shown and
as hereinbefore set forth.
3. The combination with a furnace of the steam supply through pipes J. and the
tubes G. with refractory arch E. behind the bridge D. substantially in the manner
shown and hereinbefore described.
4. The combination with a furnace of the pipes U and W. vessels O and O¹

page_text: arms N and N sliding rod, L. with the lever R secured on steam tap, substantially
in the manner shown and for the purpose as hereinbefore set forth.
Dated this 27th day of July 1892.
JOHN WAUGH,
Agent.