Improvements in Steam Boilers.
Year: 1890

page_text: Date of Application, 5th Apr., 1890
Complete Specification Left, 2nd Jan., 1891-Accepted, 7th Feb., 1891
PROVISIONAL SPECIFICATION.
Improvements in Steam Boilers.
I, JOHN KIRKALDY, of 40 West India Dock Road, in the County of
Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
I make a steam boiler of a vertical cylindrical form with dome top and furnished
at the bottom with an inner cylindrical fire box-the top of this inner fire box I
make of a dome form with an outlet passage extending sidewise from it and
carried to an opening formed through the cylindrical shell of the boiler. Above
this opening another large opening is formed through the shell and a corresponding
large opening on the opposite side. Outside each of these large openings is secured
a flat tube plate-each tube plate is flanged and shaped around its edges in such
manner that it may be secured to the exterior of the boiler shell. Numerous
tubes are passed across the interior of the boiler from one tube plate to the
other.
The products of combustion from the fire are led from the side outlet from the
fire box to one end of the tubes by a sheet metal casing secured to the exterior of
the cylindrical shell, and similarly at the opposite end of the tubes there is
another sheet metal casing on the exterior of the shell and having a chimney rising
from it.
The cylindrical shell of the boiler is made in three or more horizontal sections
secured one above the other. The two tube plates and the outlet orifice from
the combustion chamber are in one of these horizontal sections and it can
readily be removed from the other parts of the boiler and another put in its
place if necessary.
L 1
A
1 1000
JNO. KIRKALDY.
COMPLETE SPECIFICATION.
Improvements in Steam Boilers.
I, JOHN KIRKALDY, of 40 West. India Dock Road, in the County of Middlesex,
Engineer, 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 :-
I make a steam boiler of a vertical cylindrical form with dome top and furnished
at the bottom with an inner cylindrical fire box, the top of this inner fire box I
make of a dome form with outlet passages extending sidewise from it and carried
to openings formed through the cylindrical shell of the boiler. Above these
openings another large opening is formed through the shell and a corresponding
large opening on the opposite side. Outside each of these large openings is
secured a flat tube plate-each tube plate is flanged and shaped around its
edges in such manner that it may be secured to the exterior of the boiler shell.
Numerous tubes are passed across the interior of the boiler from one tube plate to
the other.
The products of combustion from the fire are led from the side outlets from the
fire box to one end of the tubes by a sheet metal casing secured to the exterior of
the cylindrical shell, and similarly at the opposite end of the tubes there is
another sheet metal casing on the exterior of the shell and having a chimney rising
from it.

page_text: The cylindrical shell of the boiler is made in three or more horizontal sections
secured one above the other. The two tube plates and the outlet orifices from the
combustion chamber are in one of these horizontal sections and it can readily
be removed from the other parts of the boiler and another put in its place if
necessary.
Figure 1 of the drawings hereunto annexed is a vertical section of a steam boiler
constructed as above described.
Figure 2 is a vertical section of the lower part of the same taken through one
of the tubular flues which passes off from the upper part of the inner dome.
Figure 3 is a side elevation with part in section and
Figure 4 a plan.
Figure 5 is a horizontal section taken at the level of some of the tubes and
Figure 6 a horizontal section taken through the fire door opening.
A is the outer cylindrical shell, B the inner fire box with dome top and tubular
flues B¹ passing off from it to openings B' formed through the outer shell A.
CC are tubes passing across the interior of the outer shell above the dome top of
the fire box at their ends they are carried by flat tube plates D which are wholly
on the exterior of the outer shell and are at their sides made to extend inwarde to
meet the shell and are shaped to be secured to it as shewn in Figure 5.
E is a
sheet metal casing around that part of the outer shell A through which the flue
openings B are formed and around the part to which one of the tube plates is
secured. F is another casing around the exterior of the other tube plate and Ga
chimney passing off from it." The portion of the outer cylindrical shell to which
the tube plates are secured and through which the openings B are formed is as
above stated made in a separate piece from the portions of the outer shell above
and below it as shewn at Figures 1 and 2.
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:-
1. The construction of steam. boilers substantially as hereinbefore described and
illustrated in the drawing annexed.
2. The combination of the outer straight sided cylindrical shell, holes formed
through it on two opposite sides-flat tube plates outside these holes which at their
sides are made to extend inwards to meet and be secured to the shell and tubes
passing across from one to the other, outside casings surrounding the exterior of
the tube plates and flues from the upper part of the fire box passing into one casing
and an outlet chimney passing off from the other.
Dated this 23rd day of December 1890.