IMPROVEMENTS IN STEAM GENERATORS to be as follows :—
Year: 1884

page_text: I JAMES BLAKE of the Britannia Works, Newton Heath, Manchester in the
County of Lancaster, Boiler Maker, do hereby declare the nature of the said
invention for "IMPROVEMENTS IN STEAM GENERATORS to be as follows :—
"
_
My Invention consists of improvements in a former invention and has for it's
object to simplify and cheapen the construction of certain forms of steam generators
and at the same time to retain or increase their strength and efficiency. In a
former invention for which Letters Patent numbered 3848 of the year 1881 have
been granted to me a vertical boiler was provided with a conical fire box which
was connected with a combustion chamber whence horizontal tubes extended into an
exterior smoke box. I now form the fire box and the combustion chamber in one
cylindrically moulded shell. The lower part of this shell is a complete cylinder
but from this lower part the shell appears as cut away at an angle from the outside
to about the central line or beyond the same this angular cut joining a vertical cut
which extends to the top of the shell. The shell is completed by riveting a flat
bent plate to the inclined and vertical edges and a semi-domed or curved crown to
the top. In some cases I may use a plate pressed or moulded into a curved or
dished form or I may curve the lower part of the plate into an arched form and
suitably cut or form the shell for the attachment thereto of the said plate. In the
inclined part of the shell an opening is cut and an oval, round or suitably shaped
tube connects the shell with the outer boiler shell and serves the double purpose of
a fire door opening and of a stay to the flat plate. The fire tubes net as stays for
the upper vertical part of the said plate. In a modification I retain the full
cylindrical form at the upper part of the shell and insert water tubes in the front
portion of this part. The term cylinder as used is not intended to exclude
tapering formations as in practice I should prefer to give an amount of taper to
the inner shell,
'

page_text: I JAMES BLAKE of the Britannia Works, Newton Heath, Manchester in the
County of Lancaster Boiler Maker do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN STEAM GENERATORS" and in what manner the
same is to be performed to be particularly described and ascertained in and by the
following statement and accompanying drawings:-
My Invention consists of improvements on former inventions and has for its
object to simplify and cheapen the construction of certain forms of steam generators
and at the same time to retain or increase their strength and efficiency. In a
former invention for which Letters Patent numbered 3848' of the year 1881 have
been granted to me a vertical boiler was provided with a conical fire box which
was connected with a combustion chamber whence horizontal tubes extended into
an exterior smoke box. I now form the fire box and the combustion chamber in
one cylindrically moulded shell. The lower part of this shell is a complete cylinder
or ring but from this lower part the shell appears as cut away at an angle from the
outside to about the central line or beyond the same this angular cut joining a.
vertical cut which extends to the top of the shell. The shell is completed by
riveting a flat bent plate to the inclined and vertical edges and a semi-domed or
curved crown to the top. In the inclined part of the shell an opening is cut and
an oval round or suitably shaped tube connects the shell with the outer boiler shell
and serves the double purpose of a fire door opening and of a stay to the flat plate.
The fire tubes act as stays for the upper vertical part of the said plate. In a
modification I retain the full cylindrical form at the upper part of the shell and
insert water tubes in the front portion of this part. The term cylinder as used is
not intended to exclude tapering formations as in practice I should prefer to give
an amount of taper to the inner shell.
In order that my Invention may be fully understood I will describe the same
with reference to the accompanying sheet of drawings which are made to a scale
of about one and a half inches to the foot. In the said drawings Fig: 1 represents
a vertical section of a steam generator constructed in accordance with my Invention.
In the said Fig: a is the outer shell which may be of any suitable form and pro-
portions B is the fire box and C. is the combustion chamber. The shells of the
tire box and of the combustion chamber are composed of three plates. The
principal shell b. is in the form of a tapering cylinder having its lower end flanged
out to unite with the outer shell and having in appearance nearly the whole of one
side cut away. I will suppose for convenience of description that the 'shell is made
as a complete tapering cylinder. From such a cylinder a portion is removed by an
The part
inclined cut on a plane from d. to e. and by a vertical cut from f. to c.
BO cut away or left as is the case in practice is made up by means of the flat
plate d. e. f. which is bent to fit the angle d. c. f. and is suitably flanged at its edges
to unite with the shell b. The part of this plate from e. to f. forms the tube plate
and tubes g. extend to the outer tube plate a. The third plate h. is moulded into an
arched form or is dished or curved and is flanged to unite with the shell b. One
edge of this plate is straight and is united with the flauged top e. of the plate e. f. d.
In practice I weld the meeting edges of the plate forming the shell b, at the point d.
>

page_text: so as to form a complete jointless ring especially in the cases of small or medium
sized generators. An oval round or suitably shaped tube i is riveted to or united
with the plate de and with the outer shell and constitutes the firing opening
suitably shaped holes being cut in the said plate and shell. I prefer to weld
the meeting edges of the plate from which this tube is formed. This tube also acts
as a stay as herein before mentioned. I do not confine myself to the use of a
separate crown plate h as this part might be in one piece with the plate def, but
this would render more difficult the formation of this plate.
Fig 2 illustrates one of the modifications which I make in the form of the
generator. In this example the shell b is made of a tapering cylindrical form as in
the previous example but the portion left out may be said to be removed by an
inclined cut from a to e and by a horizontal cut from k to l. The part dek in the
example is formed by one plate bent and moulded to unite with the shell b but if
found to be more convenient in any case it may be formed of more than one plate.
The part from c to k forms a tube plate from which water tubes extend to the
crown plate m. A tube n connects the upper end of the shell 6 with the outer
shell a and serves as a passage for the products of combustion to the uptake or
funnel. I may vary the formation in the manner indicated by the diagram Fig. 3
wherein the combustion chamber and the water tubes are inclined the products of
combustion being conveyed through the crown of the outer shell into the funnel o.
In some cases or if preferred in any case two or more tubes may take the place of
the tube n in Fig 2. I may curve the plate from d to e in either of the examples
as indicated by the dotted lines in Fig 1 the shell b being cut to correspond or the
shell may be cut straight as in the examples and the part de be pressed or moulded
into a dished form. Although I prefer to make the part d of in one piece I do not
confine myself to this.
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. The steam generators formed and constructed substantially as set forth and
indicated herein before and in and by the accompanying drawings.
2. In a steam generator the internal fire-box and combustion chamber of the
formation herein set forth consisting of the shell b united with the plate def and
provided with a crown h either in a separate piece or in one piece with the said
plate, the said plate being stayed by means of the firing tube i substantially as set
forth and indicated with reference to Fig 1 of the drawings.
3. In a steam generator the internal fire-box and combustion chamber of the
formation herein set forth consisting of the shell 6 united with the plate de'k and
with the crown m the said plate being stayed by means of the firing tube i
substantially as set forth and indicated with reference to Figs 2 and 3 of the
drawings.