Improvements in the Method of and Apparatus for the Consumption of Smoke in the Furnaces of Steam Boilers and the like.
Year: 1893

page_text: Date of Application, 24th Mar., 1893
Complete Specification Left, 27th Dec., 1893-Accepted, 10th Mar., 1894
PROVISIONAL 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 Mill, Morley
in the County of York, do hereby declare the nature of this invention to be as
follows:-
This invention has for its object the consumption of smoke in the furnaces of
steam boilers and the like in a simple and efficient manner.
We accomplish our object in the following manner: Behind the bridge at the
back of the fire bars, we form an arch or other projection of the contour of the
combustion chamber or space behind the said bridge.
The arch or projection is hollow, and provided with a number of small holes
communicating therewith, and with one or more large holes connected by tubes to
the outside atmosphere. Steam is allowed to flow into each tube as long as may
be required after charging the fire with fuel for the purpose of supplying the
combustion chamber with the necessary amount of air, which is heated on passing
through the hollow arch or the like, and distributed by the small openings into the
combustion chamber, where it amalgamates with the products of combustion and
more effectually consumes the smoke.
In combination with the hollow arch or the like, a solid arch may be built some
distance in front thereof, against which the products of combustion on leaving the
fire impinge.
Dated this 22nd day of March 1802
JOHN WAUGH,
Agent.
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 Mill, 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 combination with the furnaces of steam
boilers and the like, of an arrangement by which smoke from the said furnace is
consumed in a simple and effective manner.
In describing our invention in detail, reference is made to the accompanying
drawings in which
Fig. 1 represents a portion of the front elevation of a boiler fitted with our
apparatus and
Fig. 2 is a longitudinal sectional elevation of a furnace arranged according to
our invention.
The furnace tubes of the boiler are indicated by the letter A, and behind the
bridge B, at the back end of the fire bars F, we form an arch or other projection C
following the contour of what is commonly called the combustion chamber, that is,
the space behind the bridge B.

page_text: The arch or projection C is hollow and provided with a number of small
holes D, communicating with the combustion chamber and with one or more large
holes, the latter connected by a tube E, to the outside atmosphere, the outer end
of each tube being fitted with a door G.
The furnace doors H and H' are each provided with a series of slotted openings
and a sliding plate J having similar openings J' through the same.
The hinge
pins of both furnace doors are in two parts and the sliding plate J of each door is
connected by a rod L, to a short lever L' secured to the bottom portion K of the
respective hinge pins which are mounted free in the doors.
When the door H or H' is opened, the plate J mounted therein, is caused to
slide into the position for the slotted openings J' in the plate to correspond with
the slotted openings through the door, for the purpose of admitting cold air for a
time to the front of the furnace after the door is closed.
The top portion K₁ of a hinge pin fitted in either door, is secured to the door
and connected by a lever M and rod M¹ to a bar N. by which the steam supply
through pipes P and P¹, P is regulated in a manner as described in our
Specification No. 13793 of 1892.
To the bottom portion K of each hinge pin is secured a lever S, coupled by the
respective rods T to a piston in cach cylinder R. On admitting steam into the
cylinders by the sliding of bar N operating lever U on steam tap U', the pistons in
said cylinders are forced by the steam pressure in the direction towards the
respective doors beyond the opening of pipes P' into the said cylinders, thus
allowing steam to flow through pipes P and inject air into tubes E.
The pistons in cylinders R on moving in the direction described, operate the
levers S secured to the bottom portion K of hinge pins and thereby the short
levers L secured thereto, and through them the sliding plates J are moved such a
distance that, the before mentioned slotted openings in plates are opposite those in
the doors, where they will remain whilst steam is flowing through pipes P¹ P¹ into
tubes E. E.
So long as steam is allowed to flow through the pipes P' air is forced through
tubes E into the hollow arch or projection C connected therewith, where it is
heated, and distributed by the small holes D into the combustion chamber for
amalgamation with the products of combustion and effecting a more perfect
.combustion of smoke.
When the supply of steam is stopped in the manner as described in the before
mentioned Specification, pressure is removed from the pistons in cylinders R they
are then forced back to their normal position by the contraction of spiral springs Q
attached to levers S, expanded on admitting steam into the cylinders. By the
contraction of said springs, the levers S, hinge pius K and levers L' are operated
in the direction for causing the plates J to slide back to the position for the slotted
holes through the doors to be covered, and at the same time the doors G coupled
to the levers S by rods S¹ close, thus stopping the supply of air entering the
tubes E. E. also.
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 combination with a furnace of a hollow perforated arch or projection C
supplied by air through tube E for the purpose as herein before described.
2. A hollow perforated arch or projection C fitted behind the bridge B or the
like and combined with a tube E, door G, and steam pipe P, arranged and
operated substantially in the manner and for the purpose as herein before set forth.
Dated this 22nd December 1802
JOHN WAUGH,
Agent..