IMPROVEMENTS IN AND CONNECTED WITH TRANSVERSE WATER TUBES FOR STEAM BOILERS
Year: 1884

page_text: I, EDWARD JOSEPH CURTIN of the City and County of Bristol, Managing"
Engineer do hereby declare the nature of the said invention for "IMPROVEMENTS IN
AND CONNECTED WITH TRANSVERSE WATER TUBES FOR STEAM BOILERS" to be as
follows:-
"
My invention relates to that description of steam. boilers in which water tubes
are employed for connecting one water space of the boiler with another. In such
boilers, more particularly those where conical tubos are employed, these have
heretofore been constructed with flanges at the ends which have been rivetted to
the flue of the boiler.
According to my present invention I construct such tubes without flanges,
making them by preference as thin drawn weldloss tubos of steel, iron or other
metal and I fix thom in the boiler flue by forming flanges round the holes through
which they are passed, and rivetting the tubes to such flanges, which project iuto.
the water spaces of the boiler, so that the rivet hoads are not exposed to the fire..
Or instead of forming the flanges on the boiler flue they may be formed as separate
rings and rivetted thereto.
In some cases, I combine either two, three or four of such beforo described
flangeless conical tubes with their small ends fixed in a hollow centre piece,
establishing a communication between all the tubes, the larger ends of which are
fixed in corresponding holes in the boiler flue in the way above described.
The ends of the flangeless conical tubes, after fixing in the boiler flue, may be.
expanded in such manner as to increase the tightness of the fit.
The above
described conical tubos may be either plain or formed with longitudinal circular or
helical corrugations and the parts of the tube between the two ends may also be
made with parallel sides, or cylindrical instead of conical.
T
1004
ABEL & IMRAY,
Agents for the Applicaut,
28, Southampton Buildings,
London, W.C.

page_text: COMPLETE SPECIFICATION.
I, EDWARD JOSEPH CURTIN, of the City and County of Bristol, Managing
Engineer, do hereby declare the nature of my said invention for "IMPROVEMENTS
IN AND CONNECTED WITH TRANSVERSE WATER TUBES FOR STEAM BOILERS," 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 that description of steam boilers in which water tubes
are employed for connecting one water space of the boiler with another. In such
boilers, more particularly those where conical tubes are employed, these have
heretoforo been constructed with flunges at the ends which have been rivetted to
or welded in the flue or flues of the boiler.
According to iny present invention I construct such tubes without flanges,
making them by preference as thin drawn woldless tubes of steel iron or other
metal and I fix them in the boiler flue by forming flanges round the holes through
which they are passed, and rivetting the tubes to such flanges, which project into
the water spaces of the boiler, so that the rivet heads are not exposed to the fire.
Or instead of forming the flanges on the boiler flue they may be formed as separate
rings and rivetted thereto..
In some cases, I combine either two three or four such before described flange-
loss conical tubes with their small ends fixed in a hollow centre piece, establishing
a communication between all the tubes, the larger ends of which are fixed in
corresponding holes in the boiler flue in the way above described.
The ends of the flangeless conical tubes, after fixing in the boiler flue may bo
expanded in such manner as to increase the tightness of the fit. The above
described tubes may be cylindrical instead of conical and be fixed in the Boiler
flues in any of the ways above described and they may be either plain or formed
with longitudinal, circular or helical corrugations.
Fig. 1 of the drawings shows a vertical section of a conical water tube A fixed
in the boiler flue B by turning up the metal round the holes so as to form flanges b b
to which the tubes aro rivetted; fig 2 shews the same mode of fixing applied to a
cylindrical tube A¹; fig. 3 shews a combination of four conical tubes A² having
their larger ends fixed in the same manner to the boiler flue B while their smaller
ends are all fixed in the hollow centre piece C.
Fig. 4 shews a modification in which the flanges b'b' are formed as separato
rings that are rivetted to the boiler fluo B and to the tube A..
Although I prefer to make the water tubes as drawn weldless steel tubes as
before stated yet it will be evident that my invention is equally applicable to rolled,
brazed, rivetted or welded tubes, or to tubes of cast metal.
Ba
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 :-
•
1, Fixing water tubes in boiler flues by forming flanges round the holes of the
flues through which they are passed and rivetting the tubes to such flanges,
substantially as herein described with reference to figs 1, 2 and 3 of the drawings.
2, The use for fixing water tubes in boiler flues of annular flanges fixed round
the holes in the flue through which the tube is passed and rivetted to the tube
substantially as herein described with reference to fig. 4 of the drawings.

page_text: 3, The combination of two or more water tubes having their one end fixed to
flanges formed round the hole in the boiler flue through which they are passed,
while the other ends are fixed to a common hollow centre piece substantially as
herein described with reference to fig. 3 of the drawings.
Dated this 29th day of December 1884