Improvements in Steam Boiler Furnaces and Flues.
Year: 1896

page_text: Date of Application, 13th Jan., 1896
Complete Specification Left, 21st Sept., 1896-Accepted, 24th Oct., 1896
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler Furnaces and Flues.
We, JOHN BROWN & COMPANY LIMITED, of Atlas Works, Sheffield, in the
County of York, and JOSEPH NODDER of the same place, Iron Works Manager,
do hereby declare the nature of this invention to be as follows:-
This invention has for its object to provide boiler furnaces and flues which have
a high degree of resistance against collapse.
The furnaces or flues are made of or from plates of equal thickness throughout
and corrugations are formed therein at preferably equal intervals curved into an
arched form and joining the main body of the plate by reversely curved portions
the convexity of the corrugations being on the water side and the concavity on the
fire side and the said corrugations being arranged diagonally to the axis of the
furnace, or flue, or parallel therewith, and there are also formed in the said plate,
other corrugations which may be of similar form to the first named corrugations
but arranged so as to cross the said first named corrugations at right or other
angles so as to constitute a furnace or flue with flat portions bounded by the
corrugations.
Dated this 13th day of January 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.
We, JOHN BROWN & COMPANY, LIMITED of Atlas Works, Sheffield in the
County of York and JOSEPH NODDER of the same place Iron Works Manager
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 has for its object to provide boiler furnaces and flues which have
a high degree of resistance against collapse.
The furnaces, or flues, are made of, or from plates of equal thickness throughout,
and corrugations are formed therein at, preferably, equal intervals, curved into an
arched form, and joining the main body of the plate by reversely curved portions
the convexity of the corrugations being on the water side and the concavity on
the fire side, and the said corrugations being arranged diagonally to the axis of the
furnace, or flue, or parallel therewith, and there are also formed in the said plate,
other corrugations, which may be of similar form to the first named corrugations,
but arranged so as to cross the said first named corrugations at right, or other,
angles, so as to constitute à furnace, or flue, with flat portions bounded by the
corrugations.
The accompanying drawings shew sufficient of a furnace, or flue-plate, to
illustrate this invention. Figure 1 is a plan Figure 2 is a section on the line 1-2
Figure 1 and Figures 3 and 4 are sections on the lines 3. 4 and 5-6 Figure 1.

page_text: In the plate, corrugations a. b. are formed they being of arched form and joining
the main body of the plate by reversely curved portions a² 62 the convexities a³ ³
(see Figures 3 and 4) of the corrugations being on the water side and the
concavities at being on the fire side of the furnace or flue. The corrugations a
and b cross each other as shewn so as to leave flat portions at c which are bounded
by the corrugations a and b.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A steam boiler furnace; or flue, formed with corrugations which cross each
other; substantially as hereinbefore explained.
2. A steam boiler furnace, or flue, formed with corrugations, as hereinbefore
described and illustrated in the accompanying drawings.
Dated this 21st day of September 1896.
JOHNSONS & WILLCOX,
47 Lincoln's Inn Fields, London, W.C., Agents.