Improvements in Apparatus to be applied to Steam Boiler or other Furnaces for the Consumption and Prevention of Smoke.
Year: 1892

page_text: Date of Application, 21st Oct., 1892
Complete Specification Left, 21st July, 1893-Accepted, 26th Aug., 1893
PROVISIONAL SPECIFICATION.
Improvements in Apparatus to be applied to Steam Boiler or other
Furnaces for the Consumption and Prevention of Smoke.
I JOHN SANDERS of No. 69 Milton Street Sheffield in the County of York
Engine Tenter do hereby declare the nature of this invention to be as follows:-
My invention relates to and consists in providing and applying simple and
effective apparatus or means for accomplishing the more complete consumption
and prevention of smoke in connection with steam boiler or other furnaces,-in a
better manner than has hitherto been done.
At the front of the furnace end of a steam boiler for example I affix in connection
with the fire door, or doors, two steel or other rods having suitable levers attached
thereto, which rods are employed to automatically open and shut the air door when
required, such air door being situated in the front bridge beneath the fire bars of
the furnace, the connection between the rods and the air door being made by a rod
or chain passing therefrom underneath the fire bars and attached to the air door.
Owing to the automatic action of this apparatus when the air door is open the
fire doors are always closed and when the fire doors are open the air door is
closed which will prevent cold air from being drawn into the air chamber during
the time of firing or when cleaning or slagging the fires and so none of the cold
air will get in to cool the boiler.
The rods are suitably supported and attached to the framework of the furnace
fire door or doors. One of the two levers attached to the rods is made longer than
the other one and is so arranged and connected, and fitted to or in a suitable
bucket or cylinder, conveniently placed, containing water or oil so as to effect its
filling in order to regulate the automatic closing of the air door at the time the fire
doors are open, and the other rod with a shorter lever attached which has on it a
needle or other suitable device which will catch onto the fire door to actuate it is
operated by means of the closing of the fire door, or doors, so that when either of
the fire doors is opened the air door is necessarily closed.
A suitable balance weight is attached to or connected with the longer of the
two levers to aid in regulating the closing of the fire doors and the opening of the
air door.
Dated this 20th day of October 1892.
BRISTOW HUNT, R.P.A.,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Apparatus to be applied to Steam Boiler or other
Furnaces for the Consumption and Prevention of Smoke.
I, JOHN SANDERS of Milton Street, Sheffield in the County of York, 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 a simple and effective apparatus for accomplishing the
more complete consumption and prevention of smoke in connection with steam
boiler or other furnaces in a better manner than hitherto.
The apparatus is illustrated in the annexed sheets of drawings, in which like
letters of reference indicate like parts in any of the figures.
Fig. 1, a front elevation of steam boiler with the apparatus attached.
Fig. 2, side view of levers when valve is closed.

page_text: Fig. 3, side view of levers when valve is opened.
Fig. 4, side elevation of boiler (in section) showing the apparatus.
At the front of the furnace end of a steam boiler B, such as shown in Fig. 1, i
affix in connection with the fire door (or doors) A, two brackets C, carrying a
horizontal shaft D, upon which is fixed a depending arm E, preferably provided
with a slot E', or holes for adjusting purposes, the outer end of the shaft D, carries
a weighted lever in connection with a cylinder F, for retarding the gravitating
action of the weight W, but I make no claim to such cylinder as its use for such
a purpose is well known. To the underside of the dead plate or other convenient
and adjacent part, 1 fix supports carrying another short horizontal shaft G, upon
which is fixed a depending arm H, see Figs. 2 and 3, connected with the
corresponding arm E, by a short bar I.
A vertical arm J, also carried by the shaft G, is provided with a catch K,
pivotted to its upper end, and passing through a slotted plate L, fixed to the
. door A.
"
A long rod M, is hooked upon or otherwise connected with the arm H, and
extends forward under the furnace bars to a door or air-valve N, which is arranged
to open and close an aperture P, through the bridge Q, seen in Fig. 4, communi-
cating with an air chamber R.
The normal position of the apparatus is closed, that is, the valve N, is shut and
the levers are in the position shown in Fig. 2. When fuel is to be added to the fire,
the door A, is opened by the stoker, and the slotted plate L, attached to it is
drawn over the end of the catch K, which it raises during the movement and no
action of the apparatus itself takes place, except that the said catch drops back to
its former position.
When the stoking is done the door is closed, and in the act of closing the
plate L, comes in contact with the flat end of the catch K, which having dropped a
short distance is not high enough to be exactly opposite and to enter the slot
through which it must eventually pass.
The further closing movement of the door pushes back the catch, and the arm J,
to which it is attached, turning the shaft G, and arm. H, drawing back the rod M,
opening the valve N, and admitting air into the chamber R, of the divided
bridge Q. At the same time the movement of the arm H, is communicated to the
arm E, shaft D, and the weight W, is raised, the plunger of the cylinder being
lowered.
As the catch K, is pushed back it describes an arc of which the shaft G, is the
centre point, and consequently the end is gradually raised until eventually it enters
the slot in the plate L; the automatic closing action now commences, thetraised'
weight W, begins to exert its pressure upon the shaft D, but being retarded by the
action of the liquid in the cylinder it gradually brings the levers to the position
shown in Fig. 2, and closes the valve N.
The amount of opening given to the valve can be regulated by adjusting the
parts H, E, and I, and the speed of closing can be regulated by the position of the
weight W, and the action of the cylinder.
7
The apparatus can be thrown out of gear at any time by unhooking the rod M.
Thus it will be seen that when the firing door is thrown open, the air valve N,
remains closed, and there is no admission of cold air through the bridge, until the
firing door is being closed, when the valve is immediately opened, and admits air to
meet and mix with the unburnt gases passing over the bridge, and these 'becoming
ignited perfect combustion results.
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 combination and arrangement of the various parts specified constituting
an apparatus for the better consumption of smoke in furnaces substantially as
Laminations d
1

page_text: 2. In an apparatus, or arrangement of mechanism for the better consumption of
smoke in steam boiler furnaces, and other like furnaces, the catch K, passing
through a slotted plate L, or its equivalent, attached to the door A, in combination
with an arrangement of levers or rods connected with and operating an air valve N,
substantially as herein before described and with reference to the drawings.
3. An apparatus for the more perfect consumption of smoke, in which the valve
to admit air is opened only when the furnace door is closed and closes automatically
in the manner substantially as hereinbefore described.
Dated the 19th day of July 1893.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.