Improvements in the Construction of the Joints of Steam Generator Flues.
Year: 1891

page_text: Date of Application, 2nd Nov., 1891
Complete Specification Left, 2nd Sept., 1892-Accepted, 8th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Construction of the Joints of Steam
Generator Flues.
I GEORGE DENTON of Hope Street Barnsley in the County of York Boiler
Maker do hereby declare the nature of this invention to be as follows:-
This invention relates to the construction of the circumferential joints of steam
generator flues the object thereof being to arrange simple and efficient joints
which will allow the necessary freedom for longitudinal expansion to attain which
I either employ as a connection between each flue ring an angle-iron or steel
expansion hoop of any suitable channel form in cross section and the end of each
flue ring I bell out to an angle corresponding with the angle of the said
connecting hoop and the belled out flue ring ends may either be rivetted to the
upper or lower sides of said angle connecting hoops.
Or 1 dispense with the angle hoops aforesaid and connect the flue rings
together by belling out the end of one ring in the manner before described and
forming the end of the next flue ring to the cross sectional form of an angle bar
channel or corrugation and I rivet the ends so formed together either with the
channel formed end over or under the belled out end.
Dated this 27th day of October 1891.
H. F. BOUGHTON, M.I. Mech. E.,
London, Sheffield, and Barnsley, Agent.
COMPLETE SPECIFICATION.
Improvements in the Construction of the Joints of Steam
Generator Flues.
I GEORGE DENTON of Hope Street Barnsley in the County of York Boiler
Maker 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 :-
This invention relates to the construction of the circumferential joints of steam
generator flues the object thereof being to arrange simple and efficient joints which
will allow the necessary freedom for longitudinal expansion to attain which I either
employ as a connection between each flue ring an angle-iron or steel expansion
hoop of any suitable channel form in cross section and the end of each flue ring I
bell out to an angle corresponding with the angle of the said connecting hoop and the
belled out flue ring ends may either be rivetted to the upper or lower sides of said
angle connecting hoops.
Or I dispense with the angle hoops aforesaid and connect the flue rings together
by belling out the end of one ring in the manner before described and forming the
end of the next flue ring to the cross sectional form of an angle bar channel or
corrugation and I rivet the ends so formed together either with the channel formed
end over or under the belled out end.
In order that my said invention may be fully understood and readily carried into
effect I hereunto attach a sheet of drawings and will further describe my invention
by their aid.
Fig. 1 is a longitudinal sectional elevation of my improved flue joints and
Fig. 2 a sectional elevation of ring or hoop for said joints and
Figs. 3, 4 and 5 are longitudinal sections of modified joints.
Similar letters of reference denote corresponding parts in each view.

page_text: As a connection between each flue ring A. I employ an expansion ring or hoop B
of channel form in cross section and the ends a' of each flue ring A I bell out to
an angle corresponding with the angle of the said connecting hoop B and the said
belled out flue ring ends a¹ may either be rivetted to the upper sides of the angle
or channel connecting hoops B as shown at Fig. 1 or at the lower sides as shown
at Fig. 3.
Or referring to Figs. 4 and 5, I dispense with the angle hoops B aforesaid and
connect the flue rings A together by belling out the end a¹ of one ring A. in the
manner before described and the end a² of the next flue ring A to the cross sectional
form of an angle bar channel or corrugation and I rivet the ends so formed together
either with the channel formed end a² over the belled out end a' as shown at Fig. 5
or under as shown at Fig. 4.
I would have it understood that the form of channel ring or hoop B shown should
not be considered as a final shape but merely typical of my invention as it will be
obvious the form of channel can be varied or modified without departing from the
invention.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed, I declare that what I
claim is:
1. In the construction of the joints of steam generator flues the combination of
a channel form expansion hoop B with the belled out ends of the flue rings A and
rivetted over or under substantially as described.
2. In the construction of the joints of steam generator flues the combination of
a belled out channel formed end a with a belled out end at the end a rivetted over
or under the eid a' substantially as described.
Dated this 1st day of September 1892.
H. F. BOUGHTON, M.I. Mech. E.,
Commercial Street, Sheffield, Agent.