An Improved Smoke-consuming Appliance for Steam Generator Furnaces and the like.
Year: 1893

page_text: Date of Application, 14th June, 1893
Complete Specification Left, 14:h Mar., 1894-Accepted, 28th Apr., 1894
PROVISIONAL SPECIFICATION.
An Improved Smoke-consuming Appliance for Steam Generator
Furnaces and the like.
We, HENRY HUMPHRIES CRIBB, of Boar Lane, Leeds in the County of York,
Furniture Manufacturer, and HENRY JOSEPH HOOKE, of Basinghall Street,
Leeds aforesaid, Cabinet Maker, do hereby declare the nature of this invention
to be as follows:-
This invention has reference to that class of appliance known as a
apparatus.
"blast'
"
The object of the invention is to provide a simple and inexpensive apparatus,
applicable with a minimum amount of trouble and alteration to existing furnaces.
by which air, by means of a steam jet, may be gathered in a chamber and forced
into the interior of a furnace, the whole being for the most part a self contained
instrument requiring only a steam valve and piping to complete it, with all more or
less in full view of the attendant.
We carry out our object as follows:-
Taking a furnace of an ordinary Lancashire boiler as as example-At a suitable
distance (say one or two inches) below the centre of the crown of the furnace, I
introduce the end of my apparatus, or a pipe leading therefrom. Through this
pipe a strong current of air, which should be taken from as warm and dry a source
as possible, is impelled by a steam jet. The outer part of the apparatus consists of
a steam pipe with a suitable delivery nozzle arranged in the centre of an air
gathering chamber, which latter terminates in the delivery-end before mentioned.
When fresh fuel is added, and for a short time afterwards, steam is turned on
fully, but at other times little or none is needed.
of the steam is required when once fixed.
No further regulation than that
In order to allow the apparatus to be adjusted to different steam pressures (when
first fixed) for the purpose of obtaining the best results, simple means of adjusting
the steam nozzle, further in or out of the air chamber, are provided.
The delivery end may be elongated to suit the width of the furnace so as to
spread the current of air all over the burning fuel.
The steam in the "blast " is not only no detriment to the burning fuel but
rather an addition, nevertheless only the driest steam obtainable should be used.
A baffle plate or tube may when required be fitted inside the furnace to act as a
heat reservoir, for the purpose of further heating the incoming air before it reaches
the fuel.
Dated this 13th day of June 1893.

page_text: An Improved Smoke-consuming Appliance for Steam Generator
Furnaces and the like.
We, HENRY HUMPHRIES CRIBB, of Boar Lane, Leeds, in the County of York,
Furniture Manufacturer, and HENRY JOSEPH HOOKE, of Basinghall Street,
Leeds aforesaid, Cabinet Maker, 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 reference to that class of appliance known as a
apparatus..
"blast"
The object of the invention is to provide a simple and inexpensive apparatus,
applicable with a minimum amount of trouble and alteration to existing furnaces,
by which air, by means of a steam jet, may be gathered in a chamber and forced
into the interior of a furnace, the whole being for the most part a self-contained
instrument requiring only a steam valve and piping to complete it, with all more or
less in full view of the attendant.
In order to fully explain ourselves we have annexed two drawings which show
modifications of the appliance and its applications. Fig. 1 shows, in sectional
elevation, a mode of applying it to an ordinary Lancashire boiler; whilst Fig. 2
deals with the locomotive type. This latter arrangement would also suit a vertical
boiler furnace. In both these cases the steam nozzle is shown held in a vertical
position in the gathering chamber, with a bent pipe delivering the mingled air and
steam into the furnace in a line more or less horizontal. In Fig. 1 the instru-
ment is shown with an air tube leading to the gathering chamber so that the
air supply may be quietly drawn from above or near the boiler top, and with
the steam pipe entering the said chamber at one side. In Fig. 2 an air tube
is again shown, whilst the steam pipe (for the sake of an example, in a modifi-
These tubes, more
cation where space is valuable) is led down its centre.
especially if sufficiently bell-mouthed, subdue the noise of the inrushing air.
e
Fig. 3 shows, in sectional elevation, an approximately horizontal arrangement of
gathering chamber and the necessary steam and receiving nozzles, arranged outside
the front plate of the furnace door frame, the whole being here shown fixed by a
central screwed delivery-pipe end. Fig. 4 is a very similar arrangement, except
that the gathering chamber is inside the furnace door frame; and Fig. 5 shows the
said chamber partly through the said plate.
Fig. 6 shows a manner of regulating the distance of the receiving nozzle
away from that of the steam when the latter has been left non-adjusting by
preference.
We carry out our object as follows:-
Taking a furnace of an ordinary Lancashire boiler as an example. At a suitable
distance (say one or two inches) below the centre of the crown of the furnace I
introduce the end of my apparatus, or a pipe leading therefrom. Through this
pipe a strong current of air, which should be taken from as warm and dry a source
as possible, is impelled by a steam jet. The outer part of the apparatus
consists of a steam pipe with a suitable delivery nozzle arranged in the centre
of an air gathering chamber, which latter terminates in the delivery-end before
mentioned.
In the whole of the figs. the same parts, or their equivalents, are lettered as
follows:
A is the steam-jet delivery nozzle ;
A', & A, the steam-pipe, and valve, respectively;
B, the gathering chamber, and B' the steam-pipe-fixing;
Cand C. the receiving nozzle, and delivery-pipe, respectively;

page_text: D, & trumpet-mouthed air-gathering tube ;
E, a baffle plate or tube.
When fresh fuel is added, and for a short time afterwards, steam is turned
on fully, but at other times little or none is required. In most cases however,
especially where the draught is sluggish, it is preferable to keep the steam con-
tinually on. No further regulation than that of the steam is required when once
fixed.
In order to allow the apparatus to be adjusted to suit different steam pressures
(when first fixed) for the purpose of obtaining the best results, simple means of
adjusting the steam nozzle further in or out of the air chamber are provided.
Either the steam nozzle may be fitted with a screw a and lock nut b, see Fig. 3;
or the position of the pipe and its nozzle may be varied, in or out, as shown
in dotted lines in Fig. 3; or again the pipe may be screwed for adjustment by
nuts b, b, as in Figs. 2, 4 and 5. Where the steam pipe is itself moved care
must be taken to arrange for the requisite elasticity in that direction. Again,
where the steam nozzle is preferably left non-adjustable, the receiving nozzle
may be screwed for adjustment, as already referred to in Fig. 6. When the
appliance is wanted in considerable numbers for the same boilers, and for the
same steam pressures, one experiment would settle the nozzle distances, after
which all nozzles could be made fixed.
A suitable size of steam nozzle, for 50 lbs. per square inch pressure, may be taken
as a of an inch in diameter, delivering into a receiving nozzle of an inch in
diameter, for feeding a Lancashire boiler furnace with a grate 2 ft., 6 ins., wide, and
5 ft., 6 ins., long.
The delivery-pipe end may be elongated in cross-section into an oval to
suit the width of the furnace so as to spread the mingled current over the
burning fuel.
The steam in the "blast" is not only no detriment to the burning fuel, but rather
an addition, nevertheless only the driest steam obtainable should be used.
A baffle plate or tube may when required be fitted inside the furnace to act as a
heat reservoir for the purpose of further heating the incoming current before it
reaches the fuel. Such a heat reservoir is to be had by carrying the delivery
nozzle, plate, or tube, (as the case may be) forward into the furnace, say as shown
in dots in Fig. 1; or by prolonging the plate E in Fig. 4; or the tube E in Fig. 5;
which latter would then have to stant down at a less angle than that shown.
A simple baffle plate for deflecting, spreading, or directing the mingled current
is shown in Fig. 3; and in Fig. 2 the delivery end C¹ of the pipe is cut off at a
slant for the saine purpose.
In the locomotive type of boiler the delivery pipe C₁, instead of being introduced
at the fire door as shown, may be taken through one or more hollow stays
introduced for that purpose.
The gathering chambers, such as those in Figs. 4 and 5, require brackets & for
receiving fixing bolts, and for these there is ample room at the sides; they may be
inside or outside the furnace door plate, see d, d, in Fig. 4.
In cases in which there is little room for the introduction of the delivery-pipe end
between the crown of the flue and the fire-door top, (Fig. 1 class of arrangement)
the delivery tube could be flattened to suit the space; or two pipes, from one, or
two, gathering chambers, may be introduced a little way down on each side.
In fixing the appliance it must be remembered that it is not a mere draught
producer only, since to get the best results the steam and air should be directed so
as to impinge as far as practicable on the burning fuel in the hottest part of the
furnace, as shown, for instance, in the arrangement in Fig. 2, where the current is not
directed straight to the tubes, but somewhat downwards to the fuel. It must also
be understood that the instrument may be placed in any convenient position and
the current therefrom led as most convenient into the interior of the furnace above
the firebars and amongst the burning fuel. The aim in a Lancashire boiler should
be to deliver the current against the fuel at the end of the fire nearest the

page_text: "1
'bridge," in order that the steam should be decomposed, and in re-combining
prevent (together with the accompanying air) the formation of smoke.
The furnace door plate or frame in Figs. 1, 3, 4, 5 and 6 is represented by the
letter e.
The position of the appliance in Fig. 2 for a locomotive boiler is to be taken as
explanatory only, since little space can be found on such a boiler front, but, as
before explained, the gathering chamber may be put in any convenient corner or
position, with steam laid on, in true line, at any angle; a pipe C₁ leading the
mingled current (which must be kept hot) to the most desirable opening or openings
in the firebox.
In referring to the best results to be had by altering the steam nozzle further in
or out of the air chamber it must be understood that the maximum amount of air
should be forced into the furnace with the minimum amount of steam; heuce with
higher boiler pressures the steam nozzle may be taken further away from the
receiving nozzle, and in extra high pressures, such as in locomotives, a smaller
diam. of nozzle, in proportion to the receiving nozzle than that herein set out as an
approximate guide, may be resorted to.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. In a smoke-consuming appliance forcing a mingled jet of air and steam into
the interior of a steam generator furnace above the fire, the combination of (1) a
steam nozzle A, (2) a gathering chamber B, and (3) a receiving nozzle C,
substantially as described and shown.
2. The combination of (1) a steam nozzle A, (2) a gathering chamber B
arranged with an adjunct for allowing the steam pipe to be held in position, and
(3) a receiving nozzle C, substantially as described and shown, with the object and
for the purpose set forth.
3. The combination of (1) a steam nozzle A, (2) a gathering chamber B with
and without an adjunct for holding a steam-pipe, and (3) a receiving nozzle C, with
fittings for adjusting one or other nozzle, substantially as described and shown,
with the object and for the purpose set forth.
4. The combinations as in the first, second, and third claims, respectively, together
with (4) a delivery-pipe C³, substantially as described and shown, with the object
and for the purpose set forth.
5. The combinations as in the first, second, and third claims, respectively, together
with (4) an air-gathering tube D, substantially as described and shown, with the
object and for the purpose set forth.
6. The combination as in the first, second, and third claims, respectively, together
with (4) a spreading, deflecting, or directing plate or tube E whether sufficiently
long or bulky to act as a heat reservoir or not, substantially as described and shown,
with the object and for the purpose set forth.
7. The arrangements, applications, and combinations of the appliance as shown
in Figures 1 to 6, substantially as described and shown, with the object and for the
purpose set forth.
Dated this 19th dex of March 1901
WM.
SNOWDON,
9, Old Bank Chambers, Leeds, Yorks, Agent for the Applicants.