IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS
Year: 1884

page_text: I, WILLIAM BRUCE THOMPSON, of Dundec, in the County of Forfar, North
Britain, Engineer and Shipbuilder do hereby declare the nature of the said.
invention for "IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS" to be
as follows:-
This Invention which relates to improvements in the construction of Steam
boilers consists in rolling the plates of which such boilers are composed with
flanges or ribs thereon the said flanges or ribs may be rolled with one or more such
ribs or flanges between the ends or sides of each plate and the end flanges may be
rolled or the ends may be flanged by reheating the plates according to either of the
methods commonly used for flanging boiler plates and such plates are or may be
put together by rivetted joints or in cases which admit of it they may be rolled
into rings which are joined together at the ends by rivets or bolts.-Or in place of
rivetting the said plates they may be welded.
J. H. JOHNSON, DAY & JOHNSON,
Petitioner's Agents,
115, St. Vincent, Street, Glasgow.

page_text: COMPLETE SPECIFICATION.
I, WILLIAM BRUCE THOMPSON, of Dundee, in the County of Forfar, North
Britain, Engineer and Shipbuilder do hereby declare the nature of my invention
for IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS and in what manner
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
This Invention, which relates to improvements in the construction of Steam
Boilers, consists in rolling the plates of which such boilers are composed, with
flanges or ribs at the ends thereof, and with or without a rib or flange between
such end flanges, or the plates may be rolled with a rib at or near the centre and
otherwise left flat in which case they can be joined together by flat, overlap, or
butt joints, or the said ends may be flanged by ordinary flanging operations when
it is desired to unite the plates by flange joints, and such plates aro, or may be put
together by rivetted joints, or in cases which admit of it they may be rolled into
rings which are joined together at the ends by rivets or bolts.-Or in place of
rivetting the said plates, they may be welded.
In order that iny said Invention may be most fully understood and readily
carried into effect, I will proceed to describe the Drawing hereunto annexed.
This figure of drawing is a longitudinal section through part of a boiler flue or
-shell-constructed-according-to-and-constituting-my-present Invention.
In carrying my present Improvements into practice I roll the plates a, of which
the boilers are composed with flanges or ribs b.-The end flanges c, of the plates a,
may be flanged by reheating the plates u, according to either of the methods
commonly used for flanging boiler plates and such plates are or may be put together
by rivetted joints or in cases which admit of it, they may be rolled in the form
represented upon the annexed drawing, that is to say, in rings.-These rings, so
constructed, may be united at their ends by means of rivets or bolts passing
through the adjacent end flanges c, of any two such plates or rings in both of
which forms I prefer to use the ring d, for ensuring a tight joint, or this ring may
be dispensed with. In place of rivetting together the plates a, or rings constructed
in the manner hereinbefore described, they may be welded together at their joints.
In place of rolling the plates or rings a, with the flanges or ribs b, at or near their
centre and in other respects flat, that is to say, without end flanges, they may be
rolled without the flanges or ribs b, at or near the centre, and with end flanges c.
It will be readily understood, from the construction of boiler plates or rings in
the manner herein before described that a boiler constructed of such plates or rings
may be disjointed or taken into parts with great facility, thereby admitting of its
easy transportation, and that such a boiler may be reconstructed and made steam
tight in a comparatively small space of time.
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:
Improvements in the construction of steam boilers consisting of plates rolled with
ribs or flanges, substantially as and for the purposes herein before set forth with
reference to the annexed Figure of Drawing.
Dated this twentysecond day of December 1884
J. H. JOHNSON, DAY & JOHNSON,
Applicant's Agents.