Improvements in the Construction of Boilers.
Year: 1890

page_text: Date of Application, 4th Feb., 1890
Complete Specification Left, 17th Oct., 1890-Accepted, 6th Dec., 1890
PROVISIONAL SPECIFICATION.
Improvements in the Construction of Boilers.
We CHARLES ARNOLD of Peter Street Sheffield, Boiler Smith and HALEY ARNOLD
of Low Moor Blacksmith both in the County of York, do hereby declare the nature of
this invention to be as follows
-
The object of our invention is to dispense with a great portion of the rivetting in the
outer shells of boilers, at the same time giving strength and durability, to form the
angle off the solid plate with a perfectly square face for shells and flues, and in means
of securing or joining lengths of the shells together so that inside they leave an
even round surface. We roll the outer shells in one piece the size required for the
circumference of the boiler, upon the outside we form oval or other rings of metal as
strengthening pieces at the required intervals apart, for joining these shells together.
We preferably employ a hoop having internally a projecting rim the thickness of
the shell, the two edges of the shell fit up to this projection and when the hoop is
rivetted the internal surface is perfectly even and round.
We roll upon the inside of the boiler plates a strengthening V ring or piece the
required distance from the edge of the plate, the edge is then turned up by hand or
machinery and forms a square angle rounded in the corners of the angle, this is
applicable to flues, shells, and all boiler plates where angles are required such boilers
may be made of iron or steel.
Dated this Third day of Fabra 1800
JOHN E. WALSH,
Swan Arcade, Bradford, Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in the Construction of Boilers.
We, CHARLES ARNOLD, of 16 Peter Street, Sheffield, Boiler Smith, and HALEY
ARNOLD, of Low Moor, Blacksmith, both in the County of York, 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 :-
The object of this invention is to dispense with a great portion of the rivetting
in the outer shells of boilers, at the same time giving strength and durability.
To form the angle off the solid plate with a perfectly square face; and in means of
securing or joining lengths of the shells together, so that inside they leave an even
and level surface.
DESCRIPTION OF DRAWINGS.
Fig. 1, shows a perspective view of a steam boiler with our improvements
applied.
Fig. 2, shows a sectional view of boiler plate or shell with strengthening V piece
near the edge of the plate.
Fig. 3, shows sectional view of boiler plate or shell with edge turned up, and method
of securing the plates together.
Fig. 4, is a view of our improved boiler shell as applied to a locomotive steam
boiler.
We roll the outer shells A in one piece the size required for the circumference of
the boiler; upon the outside we form oval or other shapes B rolled solid on the plates
as strengthening pieces at the required intervals apart.
For joining these shells together we preferably employ a projecting rim C, the
[Price 6d.

page_text: thickness of the shell, the two edges of the shells fit up to this projection C and when
the hoop is rivetted the internal surface is perfectly even and round.
We also roll upon the inside of the boiler plates a strengthening V ring or piece D.
the required distance from the edge of the plate, see Fig. 2; the edge E is then turned
up by hand or machinery and forms a square angle, rounded in the corners of the angle
see Fig. 3.
This is applicable to flues shells, and all boiler plates where angles are required, such
boilers may be iron or steel.
By the above arrangement it will be seen that a great portion of the rivetting in the
outer shells of boilers is dispensed with, besides giving greater strength, and durability
to the same.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. The construction of the outer shells of boilers with oval or other section
strengthening rings rolled or formed thereon in the manner and for the purposes
such as shown and described.
2. The construction of boiler plates with a strengthening piece near the outer
edge of such plates in the manner and for the purposes such as shown and
described.
3. The use and employment of rims C having a projection for obtaining an
even and level joint in the manner and for the purposes such as,, shown and
described.
..Dated this Sixteenth.day of October; 1890.
JOHN E. WALSH,
Agent for the Applicants.