Year: 1896

page_text: Date of Application, 30th Apr., 1896
Complete Specification Left, 29th Jan., 1897-Accepted, 24th Apr., 1897
I JOHN ROBERT ROBSON Boiler Maker 87 Oak Road New Wortley Leeds
do hereby declare the nature of this invention to be as follows:-
An improvement in the construction of vertical steam boilers. The construction
of solid or built up vertical or upright annular fire box or combustion chamber
the top part of which is formed in spherical shape the vertical sides or cylindrical
portion of which is either corrugated or plain or of other formation and the
construction of one or more parts of the cylindrical portion being constructed or
formed with a flat side or sides. This said flat or flats to form and act as a tube
plate or plates into which the horizontal tubes are fitted and fixed into.
Also the formation of the bottom part of the above named flats or flat surface in
a semi circular spherical shape to enable it to resist collapsing by steam or other
fluid pressure.
Also the formation of the bottom portion of such cylindrical fire box or
combustion chamber, the top part of which is spherical in form and the vertical
cylindrical portion of which is formed into one or more flats to form a tube plate
or plates, being formed with a flange formed to allow the usual water space and to
fit the bottom part of the outer shell of boiler to which it is rivetted.
Also the construction of the shell of a vertical or locomotive boiler in such
manner that the portion of the outer cylindrical shell plate opposite to the tube
plate or flats or flat portion or portions of the fire box or combustion chambers
being formed with a solid flange, the vertical portion of which forms part of the
vertical shell and the horizontal or flanged portion which is formed also cylindrical
in shape to be of such a size as to enable the tubes to pass through with such
clearance as may be chosen as best and most suitable.
This horizontal flauge portion to be formed to suit either a cylindrical tube plate
being rivetted thereto or horizontal intermediate plates being rivetted thereto to
form the body of a locomotive boiler at the outer end of which a circular or other
shaped tube plate is attached or connected.
The inner end of the tubes to be connected fitted and fixed to and in the flat sides
or side of the tube plate or plates formed in the vertical fire box or combustion
chamber and the opposite end of the tubes connected fitted and fixed into the
circular or other shaped tube plate that is fixed and rivetted to that portion thai.
forms a part of the body or shell of a locomotive boiler or the horizontal flange
that forms a solid portion or part of a vertical shell or outside shell of boiler either
vertical or otherwise.
The improvement that I wish to claim is the construction of a spherical top
fire box the vertical cylindrical portion of which is formed into a flat or flats
solid with that part the cylindrical vertical portion so has to form a tube plate or
plates.
And the construction of a vertical cylindrical shell a portion of which is formed
into a horizontal circular or cylindrical flange to enable same to be rivetted to a
tube plate direct or to horizontal cylindrical shell plates or plate as may be desired.
And the construction of a vertical fire box or combustion chamber with

page_text: corrugated parts in which that portion that forms the tube plate or plates is solid.
with the vertical portion.
Dated this 27th day of Auril 1896.
COBIT TIME DI MOITICATION.
Improvements in Vertical and other Steam Boilers.
I, JOHN ROBERT ROBSON, of 87 Oak Road, New Wortley, Leeds, in the
County of York, Boiler Maker, 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 has reference to improvements in vertical and other steam boilers
as I shall now proceed to explain with reference to the accompanying drawings
wherein Fig. 1 is a central vertical cross section, Fig. 2 a rear elevation, and
Fig. 3 a sectional plan on the line A B of Fig. 1, showing one construction of
vertical steam generator according to this invention.
It comprises a vertical or upright fire-box or combustion chamber 1 (hereinafter
called the fire-box) made from one piece of metal. This fire-box is made with a
convex or partly spherical top 1" and with a flattened portion 2 to serve as a tube
plate the bottom part of which is connected to the lower cylindrical portion 4 of
the fire-box by a part 3 that is made of convex or partly spherical shape to enable
it to effectually resist collapsing under the fluid pressure to which it will be
subjected when the boiler is in use. The lower end of the fire-box is provided
with an annular flanged portion 6 adapted to fit the interior of the built up boiler
shell 7 to which it is secured by rivetting or otherwise so as to form the usual
annular water space between the fire-box and boiler shell. The cylindrical
portion 4 of the fire-box is provided with a fire door opening 5 which may
conveniently be formed in an outwardly extending boss like part 5ª of the fire-box
which is secured to the boiler shell around the fire-door opening 7 thereon. The
part. 5 may however be replaced by a distance piece of circular, oval or other
desired shape suitably secured in place between the fire box and boiler shell around
the openings 5 and 7 therein.
The boiler shell 7 is of cylindrical shape and the portion thereof directly opposite
to the flattened part or tube plate 2 of the fire-box is provided with a short
horizontal cylindrical portion 9, of flange like shape in section, carried by a
vertical flanged portion or plate 10 that is secured to the adjacent portions of the
boiler shell around an opening 7 therein so as t form part of the boiler shell.
8 is a circular tube plate carried at the outer end of the horizontal cylindrical
portion 9 with which it may be formed in one piece, as shown, or it may be made
as a separate plate and be rivetted to the flanged outer end of the portion 9 as may
be desired. 11 are fire tubes extending horizontally through the water space
between the fire box and boiler shell, and having their inner ends secured in any
suitable way to the flattened part 2 of the fire box and their outer ends to the
tube plate 8, so that the tubes communicate at one end with the fire box aud at
the other end with a chimney (not shown) but which may be adapted to fit the
cylindrical portion 8. 13 is a tubular stay connecting the top 1 of the fire box
with the top 12 of the boiler shell 7.
In the example shown in Fig. 1 the fire box is made from a flat plate of the
requisite length, breadth and thickness which is bent to a cylindrical shape, and
has its adjacent edges welded or otherwise secured together to form a plane
cylindrical tube one end of which is worked or closed over to form the convex

page_text: dome 1 and then flattened at one side to form the tube plate 2. When the fire-box
is required to withstand great pressures its curved or cylindrical portions may be
corrugated as shown in Figs. 5, 6, 7 and 8 whereof Fig. 5 is a vertical section,
Figs. 6 and 7 rear and front elevations, and Fig. 8 a plan of such a fire box.
will be obvious, the upper part of the fire box may be made with two or more
flattened parts like 2 to serve as tube plates, for carrying the inner ends of two or
more groups of fire tubes like 11, the outer ends of each group being carried in the
manner herein before explained.
Fig. 9 is a longitudinal vertical section and Fig. 10 a plan showing a steam boiler of
locomotive or portable type constructed according to this invention. The fire box 1
is constructed in the manner hereinbefore described and enclosed in a shell 7
provided with a horizontal cylindrical portion 9 to which one end of the horizontal
cylindrical body portion 15 of locomotive type is secured, the other end of this
portion carrying the tube plate 16 to which the outer ends of the horizontal
tubes 11 are fixed.
By the use of a fire-box constructed and arranged as described I am enabled to
construct a vertical steam generator with horizontal fire-tubes, instead of with
vertical ones as heretofore usual and in a steam generator of locomotive or portable
type I am able to dispense with the use of stays between the fire box and the shell
containing it and the usual stays for the crown of the fire box.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. In a vertical or other steam boiler, the hereinabove described improved
construction of fire box with one or more flattened parts to serve as a tube plate or
plates and circular connecting part or parts between the lower part of such flattened
part or parts and the adjacent lower cylindrical portion of the fire box, substantially
as described and shown, whether or not the wall of the fire box be plain or
corrugated.
2. A vertical steam boiler constructed substantially as hereinbefore described
with reference to and shown in Figs. 1 to 4 inclusive or modified according to
Figs. 5 to 8 inclusive of the drawings annexed.
3. A steam boiler of locomotive type constructed substantially as hereinbefore
described with reference to and shown in Figs. 9 and 10 of the drawings annexed,
whether the fire box be plain or corrugated.
Dated this 29th day of January 1897
JOHN ROBERT ROBSON.
R. E. P. Craven,
Registered Patent Agent,
22 Victoria Chambers, South Parade, Leeds, Agent for the Applicant.