Improvements in or connected with Apparatus for Consuming Smoke in Steam Boiler and other Furnaces.
Year: 1897

page_text: Date of Application, 16th Mar., 1897-4ccepted, 29th May, 1897
Improvements in or connected with Apparatus for Consuming
Smoke in Steam Boiler and other Furnaces.
We, JOHAN EMIL OLSSON, of 41 Plevna Street, Millwall, in the County of
Middlesex, Engineer, and ABEL HENRY BAYLEY, of Bayley Mills, Stalybridge,
in the County of Lancaster, Cotton-spinner and Manufacturer, 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 improvements which are more especially applicable to
smoke-consuming apparatus of the kind for which Letters Patent were granted to
R. Byrom and T. Bayley bearing date the 9th day of September 1890 No. 14198;
..but they are also applicable to certain other kinds of smoke-consuming apparatus.
In the apparatus described in.the, specification of the aforesaid patent is described
a hollow fire-bridge of fire-clay, to which air is admitted through an air-valve
which is opened automatically.by certain mechanism connected with the furnace
door, when the latter is opened, and is closed again after a certain time by hand.or
by automatic means. Now the object of our invention is to provide improved means
whereby the air valve is closed automatically within a certain time after the
fire-door has been closed.
:
And, in order. that the said invention may be fully understood we will proceed
to describe the same with the aid of the accompanying sheet of drawings in
D.which
4
Figure 1 is a longitudinal section through the furnace part of the tube of
a Cornish boiler showing our improvements applied thereto, Figure 2 is a front
elevation of the same boiler,
…¿ …. Figure 3 a transverse section taken on-line X-X of Figure 1,
5
and
Figure 4 an underside view of the firebridge and grate bars of the furnace,
Figures 5 and 6 vertical sections of our automatic air-valve closing apparatus,
Figure 7 a horizontal section taken on the line Y-Y of Figure 5.
A is the hollow bridge to which air is admitted through a valve box B containing
0 a throttle valve C mounted on a spindle or axis D. On this spindle is fixed an
arm E to which is pin-jointed one end of a rod F which extends to the front of the
furnace where it is provided with a slot F. On the lower end of the hinge pin G
of the furnace door is secured an arm G', a pin in the end of which takes into the
slot F of the rod F in such position that when the said door is opened the said pin
5 comes against the outer end of the slot F¹ and draws the rod F forward, thereby
opening the valve C so as to admit air to the hollow bridge. The spindle D of the
valve C has fixed on one or both ends a tumbling lever weight or weights F² which
tends or tend to close the valve when the pin quits the outer end of the slot F1 as
the furnace door is closed; but in order to hold the air valve C open a certain
0 length of time after the furnace door is closed, and then to close the said valve
automatically at the end of that time, we employ the apparatus shown in Figures 1,
2, 4, 5 and 6, and which we will now describe.
H is a water-tight vessel preferably of cylindrical shape open at the top or
covered with a light cover to keep out dirt. I is a watertight vessel open at the
5. top fitting more or less accurately into the vessel H, but free to slide up and down

page_text: therein without undue friction. J J¹are tubes fixed watertight to the bottom of
the vessel H and extending up through tubes K fixed watertight to the bottom of
the inner vessel I. L is a valve covering a hole in the bottom of the vessel I and
opening upwards, and L' is a valve covering another hole in the bottom of the
vessel I but opening downwards. M is a crossbar secured to the vessel I near the
top thereof and two chains N and N¹ are connected thereto by means of a ring N³.
The chain N passes up over guide pulley O rotating on a pin fixed to the
crossbar P secured to the upper part of the vessel H, down through the tube J
under a guide pulley O¹ and has its end attached to an arm 02 secured on the hinge
pin G of the furnace door. The chain. N¹ passes up over a guide pulley 0³
rotating on another pin fixed to the crossbar P, down through the tube J' and has
its end attached to the end of a lever Q pivotted at Q and having its other end
located under the outer end of the rod F.
It will now be understood that when the furnace door is opened the arm Gi
draws the rod F forward and opens the air valve C. At same time the arm 0³
pulls the chain N and raises the vessel I from the position shown in Figure 5 int
the position shown in Figure 6, and slackens the chain N¹ allowing the longer arm
of the lever Q to fall and the shorter arm to rise behind the pin Q thereby latching
the air valve C in its open position for the time being. Normally the vessels H
and I contain water, oil, or other suitable liquid up to about the level shown at R
in Figure 5; but when the inner vessel I is raised the valve L' opens downwards
and allows the water to pass out of the vessel I and to remain at the bottom of the
vessel H while the valve L is closed by the weight of water above it. When,
therefore, the vessel I has been raised into the position shown in Figure 6 it is
nearly or quite empty of liquid, the valve L closed, the valve L' open, and the
weight of the said vessel pulling on the chain N; aid matters will remain in that
condition so long as the furnace door is open. When, however, the furnace door is
closed the chain N is slackened and the vessel I begins to descend and the liquid in
the vessel H re-cuters the vessel I through the valve L which opens by reason of
the upward pressure of the liquid below it, the valve L closing for the same reason.
The speed at which the liquid re-enters the vessel I is of course dependent upon
the opening of the valve L and this can be regulated according to the time the
air-valve C is to be kept open after the furnace door is closed. The descent of the
vessel I tightens the chain N¹ and this raises the longer arm of the lever Q,
depressing the shorter arm and unlocking the pin Q2, the weights F2 then come into
action and close the air valve, drawing the rod F inwards in readiness for the next
time the furnace door is opened.
The air valve C can be opened or closed by hand independently of the automatic
apparatus by means of the knob or handle S at the end of the rod F.
We have described our automatic apparatus as applied to the closing of an air
valve used in connection with a hollow fire bridge; but it is obvious that such
apparatus may be applied for the purpose of closing automatically an air valve used
in connection with any other kind of smoke consuming apparatus.
It is also obvious that the automatic apparatus may be used without connecting
it to the furnace door, the inner vessel I being in that case raised to any required
extent by pulling the chain N by hand or otherwise.
Having now particularly described and ascertained the nature of the said inven
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
First. Apparatus for closing automatically the air valve used in connection with
smoke consuming apparatus which consists of an outer vessel containing a liquid, an
inner vessel adapted to move up and down in the outer vessel and provided with an
inlet and an outlet valve through which the said liquid passes into and out of the
inner vessel as the same rises and falls, the said inner vessel being connected on the
one hand with the furnace door so as to be raised thereby when the said door is
opened, and on the other hand with a latch lever which latches or locks the air

page_text: valve in its open position as the said inner vessel is raised, and unlatches or unlocks
the air valve, and allows it to close, as the said inner vessel descends, substantially
as described.
Second. Automatic apparatus for closing the air valve of a smoke-consuming
apparatus, constructed and operating, substantially as described.
Dated this 8th day of February 1897.
J. E. OLSSON,
A. H. BAYLEY,
Per W. H. Beck,
115 Cannon Street, London, E.C., Agent.