An Improved Steam Generator Furnace.
Year: 1895

page_text: Date of Application, 8th Mar., 1895
Complete Specification Left, 7th Dec., 1895-4ccepted, 11th Jan., 1896
PROVISIONAL SPECIFICATION.
An Improved Steam Generator Furnace.
I, WILLIAM STEWART, of 39 Arnold Street, Liverpool, in the County of
Lancaster, Engineer, do hereby declare the nature of this invention to be as.
follows:-
This invention has reference to cylindrical furnaces of steam generators of the
kind or type where the fuel is burned within them, and water surrounds them.
externally; as for instance, furnaces of steam generators of the marine or Scotch
type, Cornish and Lancashire boilers, and other like or equivalent steam generators;
and it has for its object, chiefly, to provide a construction for use in connection
with steam generators where high pressure steam is employed, by which great
strength is afforded.
According to this invention, a cylindrical furnace, or sections of a furnace flue,
of a steam generator of the kind referred to, consists of a series or plurality of
rings, and annular arched portions extending between such ringe. The rings
consist of annular concave corrugations (as viewed from within), i.e. they are
outwardly corrugated, and are turned outwards in either direction at the bottom
of such corrugations; while the annular arched (outward) portions are continuations
of these turned out parts, the width of the ribs being comparatively narrow, and
the arched portion long. Thus the section of a furnace, at the upper part, presents
comparatively narrow corrugations or rings, having the lower edges turned round
and outwards, and annular arches, i.e. simple arches, extending between same.
The narrow rings or corrugations serve, as it were, as strong supports to the arches.
or arched parts which spring from them, the arches themselves also providing great
strength.
1
1
1005
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15 Water Street, Liverpool, Applicant's Patent Agents.
COMPLETE SPECIFICATION.
An Improved Steam Generator Furnace.
I, WILLIAM STEWART, of 39 Arnold Street, Liverpool, in the County of
Lancaster, 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 :-
This invention has reference to cylindrical furnaces of steam generators of the
kind or type where the fuel is burned within them, and water surrounds them
externally as for instance, furnaces of steam generators of the marine or Scotch
type, Cornish and Lancashire boilers, and other like or equivalent steam generators;
and it bas for its object, chiefly, to provide a construction for use in connection
with steam generators where high pressure steam is employed, by which great
strength is afforded.
According to this invention, a cylindrical furnace, or sections of a furnace flue,
of a steam generator, of the kind referred to, consists of a series or plurality of

page_text: rings, and annular arched portions extending between such rings. The rings consist
of annular concave corrugations (as viewed from within), i.e. they are outwardly
corrugated, and are turned outwards in either direction at the bottom of such
corrugations; while the annular arched (outward) portions are continuations of
these turned out parts, the width of the rings being comparatively narrow, and the
arched portion long. Thus the section of a furnace, at the upper part, presents
comparatively narrow corrugations or rings, having the lower edges turned round
and outwards, and annular arches, i.e. simple arches, extending between same.
The narrow rings or corrugations serve, as it were, as strong supports to the arches
or arched parts which spring from them, the arches themselves also producing
great strength.
In the drawings annexed hereto, Figure 1 is a sectional elevation, and Figure 2,
a cross section at A A Figure 1 of a furnace according to the invention above
described.
Referring to these drawings, a are the annular concave corrugations (viewed
from within the furnace) of the rings above referred to, whilst bare the lower or
inner parts of such rings, which are turned and extend outwards and form abutments
to the annular arched portions between the rings, such arched portions being
designated c. The width of the rings, as will be seen in the drawings, are narrow
compared with the length of the annular arched portions c: the relative proportions
of the different parts, and their lengths or sizes, shewn in the drawings, are
convenient and serviceable, and may be used with advantage, the furnace shewn
being of ordinary size, say three feet in diameter.
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 :-
The herein described improved steam generator furnace, namely, a steel or iron
cylindrical furnace comprising a plurality of rings of annular concave corrugations
as set forth, and intervening annular outwardly arched portions, springing and
extending from outwardly turned parts at the bottom or inner portions of said
rings; substantially as set forth and as shewn in the drawings hereto annexed.
Dated this 6th day of December 1895.
CHEESBROUGH & ROYSTON,
15 Water Street, Liverpool, Applicant's Patent Agents.