IMPROVEMENTS IN for the Invention of STEAM BOILERS
Year: 1878

page_text: LETTERS PATENT to Joseph Sheldon Stubbs, of No. 12, Tiverton Street,
"IMPROVEMENTS IN
Ardwick, Manchester, Engineer, for the Invention of
STEAM BOILERS.”
Sealed the 25th October 1878, and dated the 8th May 1878.
PROVISIONAL SPECIFICATION left by the said Joseph Sheldon Stubbs at
the Office of the Commissioners of Patents on the 8th May 1878.
JOSEPH SHELDON STUBBS, of No. 12, Tiverton Street, Ardwick, Manchester,
Engineer. "IMPROVEMENTS IN STEAM BOILERS."
This Invention has mainly for its object to promote the circulation of the water
in steam boilers, to effect the consumption of smoke, and to economize the con-
sumption of fuel.
For these purposes the steam boiler is constructed in such a manner that the
draught shall pass downward through the fire, and between the fire-bars. The fire-
bars are wrought-iron tubes passing across from one water space of the boiler to
another; the ends of all the tubes are thus in direct communication with the water'
in the boiler, and the circulation of the water is thereby greatly increased. The.
back of the fire-place is closed in by one of these, or by a separate water space
forming a hanging partition descending to or below the level of the fire-bars. The
front of the ash-pit is closed in air-tight, and the draught passes from the ash-pit
into the flues and tubes of the boiler.
The Invention is applicable to all kinds of steam boilers.
For a Cornish boiler the tubes forming the fire-bars enter at their back end into
a narrow water space, which passes across the upper half or more of the inner.
tubular flue or flues, whilst their front ends enter a narrow water space, which
passes across the lower part of the tubular flue. An opening is left between the
bottom of this water space and the bottom of the tubular flue to give access to the
ash-pit below the bars. This opening is ordinarily closed by a door; the draught,

page_text: from the fire passes downwards through the bars, and from the back of the ash-pit
into the tubular flue.
For a portable boiler, or other boiler of the locomotive type, the tubes forming
the fire-bars pass from a water space forming the front of the fire-box to a water
space which forms the back of the box, and at a suitable height above the fire-
bars another water space is led horizontally from the front water space, and then
curved downwards to the bars, so as to form an enclosed fire-place.
The draft passes downwards between the bars into the ash-pit, and again rises
between the bars at their back end, and passes upwards behind the water space
which forms the back of the fire-place, and so passes to the ordinary horizontal
tubes of the boiler.
In order that a supply of clean boiling water may be obtained whenever required
from a steam boiler, I place within the upper part of the steam space of the boiler
a wrought-iron pipe bent backwards and forwards to and fro; the ends of the pipe
are led out from the boiler, and one of them is connected to a water supply, whilst
the other is furnished with a cock by which the heated water may be drawn off
whenever required.
A valve may also be provided to control the entrance of water to the heating
pipe.
SPECIFICATION in pursuance of the conditions of the Letters Patent and of an
Order of the Lord Chancellor filed by the said Joseph Sheldon Stubbs in the
Great Seal Patent Office on the 18th November 1878.
JOSEPH SHELDON STUBBS, of No. 12, Tiverton Street, Ardwick, Manchester,
Engineer. "IMPROVEMENTS IN STEAM BOILERS."
This Invention has máinly for its object to promote the circulation of the water
in steam boilers, to effect the consumption of smoke, and to economize the con-
sumption of fuel.
For these purposes the steam boiler is constructed in such a manner that the
draught shall pass downward through the fire and between the fire-bars. The fire-
bars are wrought iron or other metal tubes passing across from one water space of
the boiler to another longitudinally or transversely. The ends of all the tubes are
thus in direct communication with the water in the boiler, and the circulation of
the water is thereby greatly increased. The back of the fire-place is closed in by
one of these or by a separate water space forming a hanging partition descending
to or below the level of the fire-bars. The front of the ash-pit is closed in air-tight,
and the draught passes-from the ash-pit into the flues and tubes of the boiler.
The Invention is applicable to all kinds of steam boilers.
For a Cornish boiler the tubes forming the fire-bars enter at their back end into
a narrow water space which passes across the upper half or more of the inner
tubular flue or flues, whilst their front ends enter a narrow water space, which

page_text: and vertical section; Figure 2A SOCI
and Figure 3 is an end view partly in section of a steam boiler of a locomotive type
having my improvements appliod.
a and b are the front and back water spaces of the combustion chamber, and c, c,
are water tubes connecting these spaces, and serving also as fire-bars.
To admit of the insertion of these tubes, and the renewal of them from time to
time, there are openings at a¹ and b¹ in the walls of the water spaces a and b, and
these are provided with covers similar to those with which man-holes are usually
fitted. is a water space forming the bottom and sides of the ash-pit beneath the
fire-bars; it is put into connection with the other parts of the interior of the boiler
by the coupling pipes e, e; f is a waten space connected with the water spaces at
the front and sides of the combustion chamber; it serves to form the roof and back
of the fire-box. There is a doorway in the front of the boiler over the water space
f for giving access to the main tubes of the boiler, but the door is kept closed when
the boiler is at work, except it be opened for the purpose of checking the fire; g is
the opening for the fire-door, and in the fire-door with which this opening is fitted
there is a grating or regulator by which more or less air can be admitted to the
fire resting upon the water tube fire-bars c, c. The ash-pit being closed, the
draft takes a downward direction between the fire-bars, passes beneath the
lower end of the water space f, and again between the tubular bars c into the part
of the combustion chamber above the water space f. The main tubes h of the
boiler connect the combustion chamber with the smoke box and chimney.
Figure 4 is a longitudinal and vertical section, and Figure 5 is an horizontal
section of a cylindrical boiler to which my improvements are applied.
k is the internal flue of the boiler, and land m are water spaces formed through
it; they are connected by water tubes n, n, which serve also for fire-bars; o, o, are
ordinary fire-bars occupying the space between the water space and the front of
the boiler. The front of the ash-pit beneath the bars o is in this arrangement
open for the admission of air when the boiler is at work, as in the boilers of the
usual construction; the fire-door is for the most part kept closed. The back of the

page_text: ash-pit, however, is closed by a block or door beneath the water space 7, and is only
opened for the removal of ashes. Air for the supply of the fire thus passes upwards
between the bars o, o, and amongst the fuel, and the flame and products of com-
bustion then descend through the fuel at the back of the fire, and between the
water bars n, n. The products of combustion pass from the internal flue by
external flues, which are formed as is usual in setting the boiler and so to the
chimney.
¹ and m¹ are screw plugs to facilitate the insertion and removal when necessary
of the water fire-bars n, n.
The fire-bars, instead of each being connected to the boiler, may consist of one
continuous tube bent backwards and forwards.
Another part of my Invention relates to means for obtaining a supply of clean
hot or boiling water from a steam boiler. There are many manufactures in which
a supply of hot or boiling water is required, and at present it is usual to provide
separate means for heating this water, even where boilers for working steain
engines are also in use.
I render the steam boiler available for the supply of boiling water by fixing
within it a zig-zag or coiled pipe, preferably of wrought iron, which I connect by
one end to the source of supply; and from the other end of the pipe I draw off the
hot water when required by a cock or valve of ordinary construction.
The size of the pipe and the amount of surface which it is made to expose within
the boiler will be varied according to the quantity of water which it is desired to
draw at one time, and the temperature to which it is required to be raised.
The ordinary knowledge of an engineer will enable him to adjust these dimensions
to meet his requirements in each case.
Having thus described the nature of my said Invention, and the manner of per-
forming the same, I would have it understood that I claim,-
First. The construction of steam boilers with water tubes serving as fire-bars,
and with the draft of the fire made to pass downwards between the bars, sub-
stantially as described.
Second. The construction of steam boilers with water tubes serving as fire-bars,
and with the draft made to pass first in a downward direction between them,
and then to repass them in an upward direction, substantially as described.
Third. The construction of steam boilers, substantially as described in respect to
Figures 1, 2, and 3 of the annexed Drawings.
Fourth. The construction of steam boilers, substantially as described in respect to
Figures 4 and 5 of the annexed Drawings.
Fifth. The means for obtaining a supply of boiling or hot water from a stoam
boiler, substantially as described.
In witness whereof, I, the said John Sheldon Stubbs, have hereunto set my
land and seal, this 14th day of November, in the year of our Lord One.
thousand eight hundred and seventy-eight.
-הזדמם