IMPROVEMENTS IN OR RELATING TO THE MANUFACTURE OF STEAM BOILERS
Year: 1883

page_text: LETTERS PATENT to John Burlinson of Sunderland, in the County of Durham
for an Invention of "IMPROVEMENTS IN OR RELATING TO THE MANUFACTURE
OF STEAM BOILERS"
PROVISIONAL SPECIFICATION left by the said John Burlinson at the
Office of the Commissioners of Patents on the 12th July 1883.
JOHN BURLINSON, of Sunderland, in the County of Durham.
IN OR RELATING TO THE MANUFACTURE OF STEAM BOILERS".
"IMPROVEMENTS
This Invention has reference to certain improvements in or relating to the
manufacture of steam boilers.
The Invention is applicable to cylinder boilers, flue boilers, locomotive boilers,
multilubular boilers, and to various other known forms or varieties of marine and
other steam boilers; and it has especial reference to improvements in the construction
or manufacture of the front or back ends or tube or flue plates or other analogous
parts of boilers in which a number of holes or openings have to be made; and the
especial object of the improvements is to materially reduce the cost of manufacture
of such parts of steam boilers.
The above mentioned and other analogous parts of marine and other steam
boilers have hitherto been formed of wrought iron, and the various manholes, bolt
holes, doorways, and other openings for the flues and tubes, and other parts, have
had to be cut or punched out therefrom or drilled therein, and whatever projecting
parts there may have been such as flanges around the rim or round about any of
the said holes or openings have had to be turned up from the flat part of the plate ;
these operations involve an immense amount of labor, and are consequently
exceedingly costly, and moreover they considerably reduce the strength of the
plate. It is the especial object of this Invention to dispense with the whole
amount of this labor, and to make the said front and back ends and other analogous
plates or parts of steam boilers entire with what holes or openings and with what
flanges or other projecting parts there may be required, at one operation, so as not
to require the subsequent labor hitherto necessary for their formation to be expended,
thus, while attaining every advantage hitherto attained, being enabled to construct
רז

page_text: such parts of steam boilers in some cases at about one-half of the cost of the
system in use hitherto.
To effect the object of the Invention, the said parts, are, according to the present
improvements, manufactured of cast steel or other homogeneous metal in one or
more pieces, instead of of wrought iron plates in several sections as hitherto, and
the moulds being prepared of the particular formation of the parts required, the
said parts are cast complete, together with all the flanges, and flue, rivet and bolt
holes and other required projecting parts and openings, ready to receive the shell
plates, flues, tubes, doors, rivets, and other parts.
This improved system is moreover greatly advantageous in that it permits of the
parts of the plates adjacent to the tubes or other holes or openings having small
bosses or thickened rims cast round about them to strengthen the parts where the
holes or openings occur and to give a more extended bearing to each tube end or
other part. And it is further advantageous in that it permits of small ribs being
cast between the rivet holes to strengthen such parts and support the flanges;-
and of other interior and outer vertical horizontal or inclined ribs being cast on
the plates between any of the larger openings, or over any part of its surface; for
the purpose of strengthening the plate, and allowing of a boiler constructed there-
with working safely at a higher pressure than would be safe under existing
systems of construction.
Thus, the various flanges required for the smoke box, and for the flues, and
about the other openings, and the formation of which under the existing system
of construction is a source of weakness to the whole plate, are, under the improved
system of construction, caused to act as stays and to strengthen the whole plate.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Burlinson in the Patent Office on the 12th January 1884.
.
JOHN BURLINSON of Sunderland in the County of Durham "IMPROVEMENTS
IN OR RELATING TO THE MANUFACTURE OF STEAM BOILERS
ور
This Invention has reference to certain improvements in or relating to the
manufacture of steam boilers.
1
The Invention is applicable to cylinder boilers, flue boilers, locomotive boilers,'
multitubular boilers; and to various other known forms or varieties of marine and
other steam boilers; and it has especial reference to improvements in the construction
or manufacture of the front or back ends or tube or flue plates or other analogous
parts of boilers in which a number of holes or openings are required or have to be.
made; and the especial object of the improvements is to materially reduce the cost.
of manufacture of such parts of steam boilers, and which parts for conciseness of
description' are hereinafter termed and referred to as "end plates."
The end plates of marine and other steam boilers have hitherto been formed of
wrought iron, and the various manholes, bolt holes, doorways, and other openings
for the flues and tubes, and other parts or uses have had to be cut or punched out
therefrom or drilled therein, and whatever projecting parts there may have been
such as flanges around the rim or round about any of the said holes or openings.
have had to be turned up from the flat part of the plate; these operations involve
an immense amount of labor, and are consequently exceedingly costly, and more-
over they considerably reduce the strength of the plate. It is the especial object
of this Invention to dispense with this labor and yet to attain every advantage
hitherto attained, and to make the said end plates entire, with what holes or
openings and with what flanges or other projecting parts there may be required, at
one operation, so as not to require the subsequent labor hitherto necessary for their
formation to be expended, and at a cost very considerably less than that of any
system in use hitherto
To effect the object of the Invention, the end plates are, according to the present
improvements, manufactured of cast steel or other homogeneous metal instead of as
hitherto of wrought iron plates in several sections, and for this purpose suitable
moulds are prepared in a usual manner of the particular formation of the end
plates required to be made, and the end plates. are cast complete in such moulds
together with all the flanges, and flue, rivet and bolt holes and other required
projecting parts and openings, thereon and therein ready to receive the shell plates,
flues, tubes, doors, staybolts, rivets, and other parts. In some shaped end plates
it may be necessary to cast them in more pieces than one, but each such piece
would be cast complete with all its required projecting parts flanges and openings.
This improved system of manufacture is moreover greatly advantageous in that
it permits of the parts of the end plates adjacent to the tube or other holes or
openings, having small bosses or thickened rims 1, cast round about them as
represented in Figs 1 and 2 on the accompanying drawings to strengthen the parts
where the holes or openings occur and to give a more extended bearing to each
stay bolt, tube end, or other part. And it is further advantageous in that it
permits of small ribs 2 being cast between the rivet holes to strengthen such parts
and support the flanges; and of other interior and outer vertical horizontal or
inclined ribs or flanges 3, being cast on the plates between any of the larger
openings, or over any parts of the plates; for the purpose of strengthening the
plates, and allowing of a boiler constructed therewith working safely at a higher
pressure than would be safe with a corresponding boiler made according to any
previously existing system of construction.

page_text: Thus the various flanges required for the smoke box, and for the flues, and about
the other openings, and the formation of which according to previously existing
systems of construction was a source of weakness to the whole plate, are, according
to the improved system of construction, caused to act, as stays and to strengthen
the whole plate.
Having thus particularly described and ascertained the nature and objects of
my said Invention and in what manner the same is to be or may be performed or
carried into practical effect I would remark in conclusion that what I consider to
be novel and original and therefore claim as constituting the Invention secured to
me by the hereinbefore in part recited Letters Patent is:-
The improved manufacture substantially as herein before described of the front
or back ends or tube or flue plates or other analogous parts of boilers in which a
number of holes or openings are required or have to be made, by casting them in
steel or other homogeneous metal in one or, more parts complete or each part
complete with all their or its required projecting parts flanges and openings.
In Witness whereof, I, the said John Burlinson, have hereunto set my hand and
Seal, this 10th day of January, in the year of our Lord, One thousand eight
hundred and eighty four.
JOHN BUKLINSON (L.S.)