Improvements in Steam Jet Blowers.
Year: 1894

page_text: Date of Application, 23rd July, 1894
Complete Specification Left, 15th Sept., 1894-Accepted, 3rd Nov., 1894
PROVISIONAL SPECIFICATION.
Improvements in Steam Jet Blowers.
I WILLIAM HUMPHREY WHEATLEY of 40 Chancery Lane in the County of
London, Patent Agent, do hereby declare the nature of this invention, a com-
munication from Alonzo Franklin Carman of the City, County and State of New
York, Lawyer, to be as follows:-
My invention relates to improvements in steam jet blowers for boilers, and has
for its object to provide a novel jet blower, which will be adapted for an attachment
upon the door of the ash pit below the fire chamber of a boiler or other steam
generator, and below the fire, and by the novel means for connecting the steam
supply thereto, permit a free swinging movement of the ash pit door, to open or
close it.
A further object is to provide the jet blower with a flap valve to seal the draft
aperture which is formed in the blower casing, and also afford means to graduate
the influx of air thereto.
To these ends my invention consists in the construction and combination of parts,
as is hereinafter described.
The improvement may be applied to any steam generator having a fire chamber
and an enclosed ash pit below said chamber. The improved steam jet blower is
placed in connection with the front wall of the fire chamber of a horizontal boiler,
at the lower portion of the said wall, under the doors of the fire chamber, and in
the door of the ash pit.
The improved jet blower device is provided with a rectangular metal casing,
which is inserted in a laterally elongated aperture made to receive it in the door,
the casing projecting at each side of the door, the main portion being located on
the side of the door that is outermost when the latter is closed.
Preferably the casing is tapered from the outer edge inwardly so as to enclose
the end walls and side walls toward a common center point an equal degree, this
convergence being designed to diminish the opening in the casing at its inner side.
The casing is held in connection with the door, by angle pieces, that are secured
to the door and casing to seal the joint between said parts, or an integral flange
may be formed on the casing for the purpose of attaching it to the door.
The steam jet producer consists of a set of three tubes that are proportioned in
length to permit their free introduction at a proper point within the casing, said
tubes being held in a parallel plane at a suitable distance from each other by ell
fittings, four-way fittings, and nipples, these parts when assembled producing an
elongated tubular structure of rectangular form.
In the fitting, two long nipples are screwed, so as to project from these points in
the same plane, said nipples being engaged with opposite perforations formed in
the side walls of the casing, through which they project, one nipple having a solid
piece of reduced diameter, which passes through the casing and is thereby secured
by a nut on its projecting terminal.
The other nipple extended from the side wall of the casing toward the side
edge of the door, and is connected with a steam supply pipe by the flexing joint
that is composed of two ell fittings and a short nipple, the location of this joint
being at a point that will adapt it to swing freely when the door is moved on its
hinges.
The steam supply pipe is secured in position on the front wall of the fire chamber
and is extended from the steam generator, a valve being introduced, for controlling
the flow of steam to the jet producer that is adapted for the discharge of numerous

page_text: small jets of steam, by perforations, that are formed in the tubes, nipples and
fittings on their inner side at proper intervals.
On the front or outer edge of the casing a sealing gate is pendently secured by
its hinges, that are located at the upper edge of said casing, so that the gate may
be folded upwardly and rearwardly to expose the fire opening of the casing, or be
entirely closed. A latching bar that is pivoted on one side of the casing is serially
notched for a hooked engagement with a stud on the edge of the gate, whereby the
latter may be secured in a partly open condition at different angles, and thus control
the influx of air to the casing, as may be desired.
The gate being adjusted by the specified means to admit a proper amount of air,
steam is introduced to the jet producer by the adjustment of the valve, which will
cause a forcible escape of steam in numerous jets from the perforations, thereby
producing a partial vacuum in the casing that will induce a forcible flow of air
within said casing, and thence project it into the ash pit and upwardly through the
fire bed, producing a forcible combined steam and air blast, that permeates the mass
of ignited coal in the fire chamber and causes its intense combustion.
The peculiar formation of the casing and jet producer within it, affords a wide,
thin injected sheet of air and steam that is very effective in operation, speedily
blowing the fire uniformly throughout its area, and giving much better results than
circular jet blowers.
The simple swinging joints provided, permit the door to be freely opened and
closed when this is needed, and the pendent gate enables the operator to completely
seal the fire chamber when the fire is to be banked and the use of the steam
generator is to be temporarily suspended, thereby effecting a saving of fuel, and
maintenance of the fire without replenishment, for a considerable period of time,
ready for subsequent service.
Dated this 12th day of July 1894.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in Steam Jet Blowers.
I, WILLIAM HUMPHREY WHEATLEY, of 40 Chancery Lane, in the County of
London, Patent Agent, 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:-
My invention relates to improvements in steam jet blowers for boilers, and has
for its object to provide a novel jet blower, which will be adapted for an attachment
upon the door of the ash pit below the fire chamber of a boiler or other steam
generator, and below the fire, and by the novel means for connecting the steam
supply thereto, permit a free swinging movement of the ash pit door, to open or
close it.
A further object is to provide the jet blower with a flap valve to seal the draft
aperture which is formed in the blower casing, and also afford means to graduate
the influx of air thereto.
To these ends my invention consists in the construction and combination of parts,
as is hereinafter described and claimed.
Reference is to be had to the accompanying drawings, forming a part of this
Specification, in which similar letters of reference indicate corresponding parts in
all the figures.
Figure 1 is a front view of the improvement, in place on a boiler front shown
in part;
Figure 2 is an enlarged sectional plan view on the line 2-2 in Figure 1 ;
Figure 3 is a transverse sectional view, on the line 3-3 in Figures 1 and 2 ;

page_text: Figure 4 is an enlarged inside view of a detail of construction of the
improvement, taken opposite the arrow 4 in Figure 2;
Figure 5 is a side view taken opposite the arrow 5 in Figure 2 ;
Figure 6 is a sectional side view of the pipe connection for the jet blower, taken
opposite the arrow G in Figure 4, and
Figure 7 is a transverse sectional view of a part of the jet producing device, on
the line 7-7 in Figure 4.
The improvement may be applied to any steam generator having a fire chamber
and an enclosed ash pit below said chamber. For the purpose of illustrating the
application of the improved steam jet blower it is shown in connection with the
front wall of the fire chamber of a horizontal boiler, A representing the lower
portion of the said wall, B B doors of the fire chamber, and C the door of the
ash pit.
The improved jet blower device is provided with a rectangular metal casing D,
which is inserted in a laterally elongated aperture made to receive it in the door C,
the casing D projecting at each side of the door, as shown in Figures 2 and 3, the
main portion being located on the side of the door that is outermost when the
latter is closed.
Preferably the casing D is tapered from the outer edge inwardly so as to enclose
the end walls and side walls toward a common centre point an equal degree, this
convergence being designed to diminish the opening in the casing at its inner
side.
The casing is held in connection with the door, by angle pieces a, that are
secured to the door and casing to seal the joint between said parts, or an integral
flange may be formed on the casing for the purpose of attaching it to the door."
The steam jet producer consists of a set of three tubes b that are proportioned
in length to permit their free introduction at a proper point within the casing D,
said tubes being held in a parallel plane at a suitable distance from each other by
the ell fittings c, four-way fittings d, and nipples e, these parts when assembled
producing an elongated tubular structure of rectangular form.
In the fittings d, two long nipples d' are screwed, so as to project from these
points in the same plane, said nipples being engaged with opposite perforations
formed in the side walls of the casing D, through which they project, one nipple
having a solid piece of reduced diameter, which passes through the casing and
is thereby secured by a nut on its projecting terminal, as shown at d², in Figures -
and 2.
The other nipple d' is extended from the side wall of the casing B toward the
side edge of the door C, and is connected with a steam supply pipe g by the flexing
joint that is composed of two ell fittings and a short nipple fl, as shown clearly
in Figure 6, the location of this joint being at a point that will adapt it to swing
freely when the door is moved on its hinges.
The steam supply pipe g is secured in position on the front wall A of the fire
chamber and is extended from the steam generator, a valve à being introduced, for
controlling the flow of steam to the jet producer that is adapted for the discharge
of numerous small jets of steam, by the perforations i, that are formed in the
tubes, nipples and fittings on their inner side at proper intervals, as indicated in
Figure 4.
On the front or outer edge of the casing D a sealing gate m is pendently
secured by its hinges n, that are located at the upper edge of said casing, so that
the gate may be folded upwardly and rearwardly to expose the fire opening of the
casing, or be entirely closed. A latching bar o that is pivoted on one side of the
casing is serially notched for a hooked engagement with a stud o¹ on the edge
of the gate, whereby the latter may be secured in a partly open condition at
different angles, and thus control the influx of air to the casing, as may be
desired.
The gate m being adjusted by the specified means to admit a proper amount
of air, steam is introduced to the jet producer by the adjustment of the valve h,

page_text: which will cause a forcible escape of steam in numerous jets from the perforations i,
thereby producing a partial vacuum in the casing D, that will induce a forcible
flow of air within said casing, and thence project it into the ash pit and upwardly
through the fire bed, producing a forcible combined steam and air blast, that
permeates the mass of ignited coal in the fire chamber and causes its intense
combustion.
The peculiar formation of the casing D and jet producer within it, affords a wide,
thin injected sheet of air and steam that is very effective in operation, speedily
blowing the fire uniformly throughont its area, and giving much better results than
circular jet blowers.
The simple swinging joints provided, permits the door C to be freely opened and
closed when this is needed, and the pendent gate m enables the operator to com-
pletely seal the fire chamber when the fire is to be banked and the use of the steam
generator is to be temporarily suspended, thereby effecting a saving of fuel, and
maintenance of the fire without replenishment, for a considerable period of time,
ready for subsequent service.
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 :
In a steam jet blower, the combination with a rectangular apertured door hinged
to swing on the front of a boiler fire chamber, a rectangular inwardly converged
casing secured in the aperture of the door, and a pendent hinged and adjustable
gate at the front of the casing, of a rectangular tubular jet producer located
transversely within the casing, a steam supply pipe extending through the side of
the casing, a swinging joint in said pipe between the door hinges and adapted to
align therewith, and a valve in the steam pipe, substantially as described.
Dated this 15th September. 1894.
W. H. WHEATLEY,
40, Chancery Lane, London, W.C.