IMPROVEMENTS IN THE CONSTRUCTION OF STEAM BOILERS
Year: 1884

page_text: I, WILLIAM BRUCE THOMPSON, of Dundee, 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:
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This Invention, which relates to improvements in the construction of steam
boilers, consists in casting the plates, of which such boilers are composed, in steel,
and with flanges or ribs thereon. The said flanges or ribs are or may be cast
continuously round or upon the lengths or widths of the plates, or the boilers may
be composed of sections or lengths of the barrels, or flues, or other parts, of such
boilers with the necessary flanges, or increased thicknesses, at the parts required for
joining the sections together, and which sections may be so joined either by riveting,
bolting, or welding, them together. Besides end flanges, or increased thicknesses,
for making the joints, the parts of the plates or sections between the ends may be
cast with flanges or thickened portions, or the end flanges may be produced by
re-heating the plates and flanging them after the manner of ordinary boiler plates.
Or such plates formed or cast in the manner hereinbefore described may be united,
when necessary, by bars of angle or bent iron or steel riveted, bolted, or welded
together with them.

page_text: 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 casting the plates, of which such boilers are composed, in steel,
and with flanges or ribs thereon.-The said flanges or ribs are or may be cast
continuously round or upon the lengths or widths of the plates, or the boilers may be
composed of sections or lengths of the barrels, or flues, or other parts of such boilers
with the necessary flanges, or increased thicknesses, at the parts required for joining
the sections together, and which sections may be so joined either by riveting,
bolting, or welding, them together.-Besides end flanges, or increased thicknesses,
for making the joints, the parts of the plates or sections between the ends may be
cast with flanges or thickened portions, or the end flanges may be produced by
re-heating the plates and flanging them after the manner of ordinary boiler plates.―
Or such plates formed or cast in the manner hereinbefore described may be united,
when necessary, by bars of angle or bent iron or steel riveted, bolted, or welded
together with them.
In order that my 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 cast the plates a, of which
the boilers are composed, in steel and with flanges or ribs b, thereon.-These flanges
or ribs b, are or may be cast continuously round or upon the lengths or widths of
the plates a, or the boilers may be composed of sections or lengths of the
barrels, or flues, or other parts of such boilers, with the flanges c, or increased
thicknesses at their ends necessary for joining the sections together.-These joints
may be made by rivets or bolts passing through the two adjacent flanges c, of any
two such sections, under which construction of joint I prefer to use the ring d, for
rendering the same a tight joint; or the ring d, may be dispensed with, or the said
sections may be united by welding. Besides the end flanges c, or increased thick-
nesses for making the joints, the parts of the plates a, or sections within or between
the end flanges c, may be cast with one, two or more of the flanges or ribs b, herein-
before described, or with thickened portions. The end flanges c, may be produced
by reheating the plates and flanging them after the manner of flanging ordinary
boiler plates. Or the plates a, or sections formed or cast in the manner herein before
described may be united, when necessary, by bars of angle or bent iron or steel
riveted, bolted or welded together with them.
It will be readily understood, from the construction of boiler plates or sections,
in the manner herein before described, that a boiler constructed of such plates or
sections, may with great facility be disjointed or taken into parts, thereby admitting
of its easy transportation and that such a boiler may be re-constructed and made
steam tight in a comparatively short space of time.

page_text: 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 cast
in steel with ribs, flanges or increased thicknesses substantially as and for the
purposes hereinbefore set forth with reference to the annexed Figure of drawing.
Dated this twenty second day of December 1884.
J. H. JOHNSON, DAY & JOHNSON,
Applicant's Agents.