Improvements in Steam Boiler Furnaces or Flues.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler Furnaces or Flues.
I, ERNEST GEARING, of Penshurst, Clarence Drive, Harrogate, in the County
of York, Engineer, do hereby declare the nature of this invention to be as
follows:
A steam boiler furnace or flue according to this invention is formed with a
series of annular arch-like corrugations projecting outwardly into the water space
of the boiler connected by intervening corrugations of a less curvature, and also
of a less thickness, which project inwardly into the fire space of the furnace or
flue, the parts thereof which have the largest diameter being of the greatest
thickness and those parts which have the smallest diameter being of the least
thickness, the variation in thickness being symmetrical or proportional to the
variation in diameter.
improvements in Steam Boller Furnaces or Flues.
I, ERNEST GEARING, of Penshurst, Clarence Drive, Harrogate, in the County
of York, 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 :
-
A steam boiler furnace or flue according to this invention is formed with a
series of annular arch-like corrugations projecting outwardly into the water space
of the boiler connected by intervening corrugations of a less curvature, and also
of a less thickness, which project inwardly into the fire space of the furnace or
flue, the parts thereof which have the largest diameter being of the greatest
thickness and those parts which have the smallest diameter being of the least
thickness, the variation in thickness being symmetrical or proportional to the
variation in diameter.
The accompanying drawing shows in longitudinal section a portion of the
wall of a furnace or flue constructed according to this invention.
a, a are annular arch-like corrugations projecting outwardly into the water
space of the boiler, connected by intervening corrugations & (whereof one is
[Price 8d1

page_text: shewn) of a less curvature, which project inwardly into the fire space of the
furnace or flue.
The thickness of plate varies in proportion to the variation in diameter, the
greatest thickness being in the transverse planes c where the diameter is largest
whence the thickness gradually decreases to d where the diameter is the smallest.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
I claim is:-
A steam boiler furnace or flue forined with annular arch-like corrugations
projecting outwardly into the water space of the boiler, connected by intervening
corrugations of a less curvature and also of a less thickness which project inwardly
into the fire space of the furnace or flue, the parts thereof which have the largest
diameter being of the greatest thickness, those parts which have the smallest
diameter being of the least thickness and the variation in thickness being sym-
metrical or proportional to the variation in diameter, substantially as described
and illustrated,
and illustrated,
Dated this 18th day of December 1899.
For the Applicant,
t
W. LLOYD WISE,
46, Lincoln's Inn Fields, London, W.C.,
Chartered Patent Agent.