Improvements in Galloway Boilers.
Year: 1894

page_text: The decision of the Comptroller-General, of the 14th day of January 1895,
allowed, under Section 18 of the Patents, &c. Act, 1883, an Amendment
of this Specification.
Date of Application, 10th July, 1894-Accepted, 11th Aug.. 1894
COMPLETE SPECIFICATION (AMENDED).
Improvements in Galloway Boilers.
I, CHARLES JOHN GALLOWAY, of Knott Mill Iron Works, Manchester,
Engineer, 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:-
My invention relates to a construction of the flue and tubes of a Galloway boiler
in such a manner that the flue is greatly strengthened and has its heating surface
increased, that the tubes are made of a strong and simple form and all of the same
shape and size so as to be interchangeable as I will describe referring to the
accompanying drawings.
Fig. 1 is a plan of part of a flue with cross tubes according to my invention.
Figs. 2, 3 and 4 are sections on the lines X X, Y Y, and Z Z of Fig. 1
respectively.
The flue consists of two side parts AA which are by preference corrugated
except at their edges but which may also be left plain, and of an upper
part B and a lower part C both of which are undulated except at their
edges, which are rivetted to the edges of the side parts A.
Each tube D
is made, as usual, tapering to an increased diameter at its upper end and
has its ends coned outwards to fit the undulating surface of the parts B and C to
which they are rivetted. The parts B and C are made in lengths having their
ends preferably flanged outwards, and the flange of each length is rivetted to that
of the next as shewn in the small scale view of several lengths fixed together at
Fig. 5, these flanges constituting as it were transverse girders which greatly
strengthen the flue. If desired, a caulking or strengthening plate E may be
introduced between the flanges of the contiguous lengths as shewn.
Although I prefer to construct the lengths B and C with flanges as described,
yet in some cases they may be made without them and the contiguous ends be
rivetted together with lap joints.
It will be seen that by the above described conical enlargement of the ends of
the tubes D, the advantage is gained that the flanges are bent at an obtuse angle
to the tube, instead of being bent approximately to a right angle as in the ordinary
Galloway tubes and thus a much stiffer form of support is obtained to resist the
heavy strain on the flue.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
--
1. A Galloway boiler flue baving its upper and lower parts undulated, and its
tubes coned at the ends to fit the undulations, substantially as
transverse
described

page_text: 2. In a Galloway boiler flue constructed as set forth in the first claim, constructing
the sections of the undulated upper and lower parts with flanges at the ends for
securing them together, substantially as described.
3. Construoting Galloway boiler tubes with their ends coned outwards-so-that
an obtuse angle is formed between the tube-and the flange whereby the strength of
the tube to resist the strain on the boiler flno is increased.
Dated this 9th day of July 1894
ABEL & IMRAY,
Agents for the Applicant.