Year: 1887

page_text: Date of Application, 25th Feb., 1887
Complete Left, 25th Nov., 1887
Complete Accepted, 27th Dec., 1887
1 JOHN ARMYTAGE BATLEY of 1 Elvaston Place, Queen's Gate, in the County of
Middlesex, Barrister-at-Law, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in that class of Boilers in which steam is
rapidly generated by passing the feed water through coils which are exposed to the
direct action of a furnace fire.-Hitherto it has been found, in this class of boiler, that
although steam is rapidly generated, the supply is as rapidly exhausted, and con-
sequently the power generated by such boilers is liable to become intermittent, and
not, therefore, available for the propulsion of vessels, or in fact for any duty where a
constant force is required to be exerted.
Again, it has been impossible for the attendant to know the condition of the water
supply, and to guard against the explosion due to the burning or overheating of the
coils.
To remedy the defects in such boilers is the object of the present invention.-To
this end I provide a steam chamber or receiver, equal, say, in capacity to that of all
the coils of pipe contained in the boiler. This receiver will take, preferably, a
cylindrical forn, and will stand up at the side of the boiler casing, so as to present a
steam guage which it carries to the view of the attendant when standing near the
furnace door. In a corresponding position, I fit a vertical cylindrical water chamber
carrying a water gauge in view of the attendant.
The boiler, as I propose to construct it, will be a vertical cylinder, and contain say
three concentric vertical coils, the second of which will contract at its upper end to a
diameter somewhat smaller than that of the innermost coil.
Immediately above the coils is situated a cover formed with a central opening to
receive a damper.-This cover is somewhat smaller in diameter than the case of the
boiler, and an annular space is thus formed between them for the escape
of the gases
of combustion, when they are not allowed to pass through the central opening in the
cover.
Pendent from this cover is a circular curtain which extends down some five or six

page_text: turns of the outermost coil, surrounding the same, and serving to direct the flame and
gases (when the damper is closed) through the outermost coil to the annular space
before mentioned, whence the gases will escape to the chimney.-The chimney rises
from the centre of the top of the boiler, which is coned to correspond somewhat with
the sectional form of the above mentioned cover.-The casing of the boiler is fitted at
bottom with a cylindrical casting which carries the fire grate.-This casting supports,
or may be formed with, an annular plate on which the coils rest, and the whole
surface of this casting exposed to the direct action of the fire is protected by fire
brick.
The several coils connect at bottom with the bottom of the water chamber, and they
also connect at top with the upper part of the water chamber.-This chamber is
brought into communication with the steam receiver near its top by means of a
transverse pipe, and from a central pipe in the steam receiver cover the steam is led
off to the engine to be worked.-Water is supplied to the water chamber by a force
pump, and the water entering the bottom of the coils will rise through the coils, and
be discharged either as hot water, or in the form of steam, into the water chamber.-
By means of the lateral pipe, the steam will be led off to the receiver, and accumu-
lating therein, it will constitute a reserve for the supply of the engine. The hot
water discharged into the top of the water chamber will be returned to the coils, and
thus a thorough circulation will be secured.-Suitable discharge cocks are provided
in the steam and water chambers for drawing off water therefrom. The central
damper in the cover is used to control the draught, the gases of combustion escaping
through the cover directly to the chimney when a quick draught is required, or when
the generation of steam is desired to be retarded. When the damper is closed, the
gases of combustion pass through the coils and turn under the curtain to the chimney,
thus retarding the combustion and economising the heat.
Datad this with day at Fahun 1207

page_text: I JOHN ARMYTAGE BATLEY of 1, Elvaston Place, Queen's Gate, in the County of
Middlesex, Barrister-at-Law, 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 in that class of Boilers in which steam is
rapidly generated by passing the feed water through coils which are exposed to the
direct action of a furnace fire.
Hitherto it has been found in this class of boiler, that altho' steam is rapidly
generated, the supply is irregular, and therefore frequently exhausted, and consequently
the power generated by such boilers is liable to become intermittent, and therefore
unsuited for the propulsion of vessels, or for duty where a constant force is required
to be exerted.
Again, it has been impossible for the attendant to know the condition of the water
supply, and to guard against the explosion due to the burning or overheating of the
coils.
To remedy the defects in such boilers, is the object of the present invention.
In the accompanying drawing, I have shown in several views my invention as
applied to a steam boiler of the above named class.
Fig. 1 is a vertical section of the improved boiler, and
Fig. 2 is a back elevation of the same.
This boiler may be described as consisting of a cylindrical furnace A, partially
covered by an annular plate B, and carrying a cylindrical casing C, which is coned at
top, and terminates in a central flue D.-Set up upon the plate B, are three cylindrical
concentric coils E E' E2, which connect at bottom with a water chamber or receiver F,
and also at top with the same receiver.-G is a steam chamber or receiver connected
by a pipe with the water receiver F, and fitted with a delivery pipe g for conducting
steam to the motive power engine.
H is a curtain situate above the coils, and carrying a damper h, which closes a
central opening in the curtain, coincident with the central flue D.
The water chamber or receiver F, I make by preference exceed in area double the
combined areas of the coils of pipe contained in the boiler. This receiver takes
preferably a cylindrical form, as shown at Fig. 2, and stands up at the side of the
boiler casing, so as to present a water gauge f³, which it carries, to the view of the
attendant when standing near the furnace door a.-In a corresponding position to
this receiver, is situate the cylindrical steam receiver, which is made of about the same
capacity, and carries a gauge g¹ (shewn also in Fig. 2) in view of the attendant.
The cylindrical portion of the casing C of the boiler, consists of two thicknesses of
sheet metal, interposed between which is a lining of silicate cotton, or equivalent non-
conducting material. This casing encloses the three concentric vertical coils E E' E²,
but a less or larger number may be used if thought desirable. The second coil E
contracts at its upper end to a diameter somewhat smaller than that of the innermost
coil E, and thereby presents the steam which it contains to an intense heat
immediately before its passage out of the boiler.
.
Above the coils, the curtain H is situated, it being supported by bolts pendent from
the coned portion of the casing. This curtain is formed of a slightly dished annular
plate with a lip or flange h pendent from its periphery. It is made somewhat
smaller in diameter than the case of the boiler, and there is thus formed an annular

page_text: space between the curtain and the case C, for the escape of the gases of
combustion.
The flange or lip ' (formed of sheet metal) extends down to some five or six turns
of the outermost coil, and serves to direct the flame and gases (when the damper is
closed) through the outermost coil E2 to the annular space h2, whence the gases will
escape to the chimney.
The furnace A consists of a cylindrical casting, which rests upon a bed plate A'.-
Upon this bed plate, the fire bars a¹ are carried, an annular rebate being made around
a central opening in the plate to receive the bars. Below this bed plate is situated
the ash pit A2. The casting A supports the plate B on which the coils rest. This
plate may, however, be formed with the cylindrical casting A, if thought desirable.
The surface of the casting exposed to the direct action of the fire is protected by fire-
brick, and so is also the underside of the plate B.
The sectional plan view Fig. 3 shows the mode of connecting the several coils with
the bottom of the water receiver F, and the sectional plan view Fig. 4 shows the
mode of connecting the upper ends of the coils with the upper part of the same
chamber.
To facilitate the connecting of the several coils E E E with the receiver F, and
also to break up the lateral draught of the gases of combustion, the outermost and
innermost coils take the form of say a right handed helix, while the intermediate coil
is laid in the reverse direction, or to the left.
Water is supplied to the receiver F by a force pump, and finding its way into the
several coils, it will rise through the coils, and be returned either as hot water, or in
the form of steam, into the receiver F.-By means of the lateral pipe f, which
connects the water and steam receivers together, the steam, as it is delivered from the
coils, will be led off to the receiver G, and accumulating therein, it will constitute the
desired reserve for the supply of the engine. The hot water discharged into the top
of the water chamber will be returned to the coils, and thus a thorough circulation
will be secured. Suitable discharge cocks are provided in the steam and water
chambers G and F. for drawing off water therefrom, and a gauge g² is.provided to
show the level of the water of condensation in the steam receiver.
The spindle of the damper h in the curtain H is extended through the case C, and
fitted with a handle for working it. Its use is to control the draught, allowing, when
it is open, the gases of combustion to escape directly to the chimney, when a quick
draught is required, or when the generation of steam is desired to be retarded. When
the damper is closed, the gases of combustion pass laterally through the coils, and
turn under the curtain to reach the chimney.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
1. In steam boilers in which the heating water space consists of coils of pipes, the
arrangement of parts for maintaining the supply of steam to the engine to be served.
as described with reference to the drawing.
2. Adapting to boilers in which the heating water space consists of coils of pipe, a
water receiver and a steam receiver fitted with sight gauges, such receivers serving
the one to ensure a proper circulation of the water, and the other to retain a reserve
of steam, as and for the purpose above set forth.