Improvements in Steam Generators, especially applicable to Stationary, Locomotive, and Marine Steam Engines in which a High Initial Pressure is used.
Year: 1890

page_text: Date of Application, 25th Oct., 1890
Complete Specification Left, 25th July, 1891-Accepted, 29th Aug., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Generators, especially applicable to
Stationary, Locomotive, and Marine Steam Engines in which
a High Initial Pressure is used.
We, EDWIN CHARLES URRY, Engineer, and GUILLERMO ANTONIO FARINI,
Gentleman, both of 232 Goswell Road, in the County of Middlesex, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to an improved tubulous steam generator, especially
applicable to cases in which a high initial steam pressure is required, and the
space available for such generator is limited. The objects sought to be attained
are, firstly; an arrangement of parts by means of which a larger area of heating
and steam producing surface is exposed to, and acted upon by the heat produced by
the combustion of fuel, than is obtainable with other boilers of similar type as
hitherto made or used. Secondly, the method of construction adopted by us
admits of perfectly free access to the tubes and interior of the shell, when this is
necessary for cleaning or repairing purposes; thirdly, by the arrangement of the
tubes, water and steam spaces, according to our said invention we are enabled to
utilise the convection of the heated fluid to the best advantage, and to maintain a
comparatively equal temperature throughout the interior of the generator. Thus
we are enabled to construct a steam generator which is quickly heated, economi-
cally maintained as regards the fuel used, is easily taken apart when necessary,
and is not liable to deterioration through unequal expansion or contraction whilst
in use.
In carrying our invention into effect we employ a cylindrical, or other curvilinear
casing of iron or other suitable metal. Said casing is divided into three sections
longitudinally, the upper and lower of which are flanged so as to be removeable if
necessary. The lower portion is furnished with an inner chamber, hereinafter
termed the combustion chamber, which is preferably conical or tapering internally,
and is covered by a flat tube plate, with a flanged joint to allow of removal when
necessary. The upper portion of the casing above referred to is provided with a
similar tube plate and vertical, or approximately vertical tubes are fixed between
the two plates. The lower ends of the tubes are preferably beaded, or coned, and
the upper ends provided with adjustable ferrules, nuts, or the like thus affording a
number of stays or ties between the flat surfaces of the boiler which are exposed
to the pressure of steam, each of which is readily replaced in case of need. The
outer casing, with flanged joints as already described, is fitted upon a hollow
casting or other metallic structure which acts as a furnace, and contains the burning
fuel, receives the ashes and waste solids, and may be arranged so as to regulate the
supply of oxygen to the fuel within a definite and predetermined degree relatively
to the fluid evaporated. An external casing, preferably of metal, surrounds the
tubulous generator hereinbefore described, and sufficient space is provided between
the two casings to allow of the circulation of heated air, forming an efficient
lagging, or non-radiating appliance. The upper part of this external casing may
be domèd or chambered to receive the products of combustion, and be connected
to the funnel or chimney.
We are thus enabled to produce a boiler or steam generator of large heating
surface, and consequently rapid evaporation of fluid with a reduced consumption of
fuel, and at the same time to render the structure capable of resisting great
internal pressures. And, in addition to the fact that the whole of the direct heat
from the burning fuel is used for evaporation, we provide means for preventing
radiation, and consequent loss; and further, we are enabled to construct a steam

page_text: generator according to our invention which may be taken apart and refitted without
derangement or loss of time.
We may or may not use a superheating feed appliance or apparatus in con-
junction with our invention, and while the principle of arrangement and disposition
of parts is maintained, we do not confine ourselves to any special configuration,
externally or internally but may vary this to meet the requirements of any par-
ticular case of application.
Dated this 23rd day of October 1890.
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Steam Generators, especially applicable to
Stationary, Locomotive, and Marine Steam Engines in which
a High Initial Pressure is used.
We, EDWIN CHARLES URRY, Engineer and GUILLERMO ANTONIO FARINI
Gentleman both of 232 Goswell Road, Islington in the County of Middlesex 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:-
Our invention relates to improvements in tubulous steam generators, and is
especially applicable to cases in which a high initial pressure is required, and the
space available for such generator is limited.
The objects sought to be attained are, firstly, an arrangement of parts whereby
a larger area of heating surface is obtained, and a method of construction in which
the steam producing surface is capable of perfect radiation, and is acted upon by
the heat produced by the combustion of fuel in a more effective manner than is the
case with high pressure steam generators as hitherto made and used. Secondly,
the method of construction adopted by us admits of free access to the tubes and to
the interior of the shell when this is necessary for cleaning or repairing purposes.
Thirdly, by the arrangement of the tubes, water and steam spaces, according to
our invention, we are enabled to utilise the convection of the heated fluid to
the best advantage and to maintain a comparatively equal temperature throughout
the interior of the generator or heating apparatus, as the case may be. Thus we
are enabled to construct a generator or boiler in which a high pressure, or a perfect
circulation is rapidly obtained with economy in the fuel used, and can easily be
taken apart when necessary.
In order that our invention may be the better understood, we have appended the
accompanying two sheets of drawings, in which
Figure 1 Sheet 1 is a sectional elevation of a steam pressure generator, and
Figure 2 is a plan view thereof, partly in section.
Figure 3 Sheet 2 is.a sectional elevation of a steam generator of modified con-
struction, and
Figure 4 is a plan view thereof shewn partly in section.
Similar letters of reference denote corresponding parts in the several views.
In carrying our invention into effect, we employ a cylindrical or other curvilinear
shaped casing A of iron, cast steel or other suitable metal. Said casing A is
divided into three or more sections a be which are flanged and suitably jointed by
rivetting as at e or by means of bolts nuts or studs as at f where it is desirable
that the casing should be readily disconnected for any purpose, a suitable method
of and means for securing a pressure tight joint being adopted. The lower flange g
is jointed to a chamber B which may or may not be divided into two parts at h,
Figure 1. Said chamber B is shaped so as to form a combustion chamber C with
an annular water space m surrounding it. The chamber B, and the interior portion
of it forming said combustion chamber C may be cast, rolled, welded, rivetted or

page_text: otherwise made of metal with plain surfaces, or the outer and inner surfaces or
either of them may be formed with angular, vertical, annular or spiral volutes
or corrugations for the purpose of increasing the heating surface, and also to
strengthen the structure. The combustion chamber C is covered by a tube plate T
with a flanged joint i to allow of removal when necessary. The upper part of the
casing A is provided with a similar tube plate D, attached thereto by the flanged
joint d. Vertical, or approximately vertical tubes are fixed between the two
plates T and D. The lower ends of said tubes t are preferably beaded and coned
where they fit into the plate D, but the upper ends are provided with screw
threads as at or adjustable ferrules as at j for retaining them in position or any
equivalent means therefor. Said tubes t may also be formed with volutes or
corrugations vertically arranged, or they may be plain. When said tubes are fixed
in position they serve to stay the two tube plates T and D, acting as ties, and
resisting the action of the internal pressure upon the two flat surfaces and any
such tube may be readily replaced when necessary;
The whole structure, consisting of the outer casing A, tube plates T and D, with
the tubes and the chamber B is fitted upon a hollow casting or other metallic
structure H by the flanged joint 1, which being suitably lined with fireclay or
other refractory material J, acts as a furnace, and contains the burning fuel in the
space E upon the firebars F. The space K below said bars forms the ashpit, and
we adapt a suitable shield or shutter to the air orifice of K for the purpose of
regulating the supply of oxygen to the fuel at a rate corresponding to the fuel
evaporated. An external casing G, preferably of metal surrounds the structure
hereinbefore described so that an annular space L is left between them, which
may be filled with any non-conducting material as shewn by Figure 1, or may be
open as in Figure 3, so that the heated air may circulate therein, in both cases
forming an efficient lagging and preventing loss of heat by radiation. The upper
part of the outer casing G may be domed or chambered to receive the products of
combustion as these pass from the tubes t, and is attached to a chimney flue or
funnel at 1.
The modified construction shewn by Figures 3 and 4 Sheet 2 illustrates the
method adopted when a generator according to our invention is made of ordinary
boiler plate, with angle iron flanges rivetted thereto for attachment as hereinbefore
described. As the various parts are lettered to correspond with Figure 1, a detailed
explanation is not necessary.
We do not confine ourselves to the exact shape and construction of a generator
as described and shewn by the drawings, but may, under certain circumstances vary
the details without departing from the essential features of our said invention.
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
First. In a steam generator or boiler the combination of a jointed shell or
casing A with a chamber B, combustion chamber C, tubes and tube plates, con-
tained within a casing G and upon a hollow casting H substantially as herein
described and shewn by the appended drawings.
Second. In a steam generator or boiler as referred to in the preceding claim the
use or employment of corrugated or voluted surfaces, substantially as described
with reference to the drawings.
Third. In a steam generator or boiler the method of, and means for disconnecting,
removing and replacing the parts thereof, substantially as herein described and
shewn by the drawings.
FREDK. WALKER,
11, Furnival Street, Holborn, London, E.C., Agent for the Applicants.