Improvements in Fire Bars.
Year: 1899

page_text: Improvements in Fire Bars.
I, BENJAMIN DRAPER, of Knowsley Grove, Liverpool, in the County of Lan-
caster, Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object to provide improvements in connection with
fire bars, by which the length of life of the fire bars in furnaces, and more
especially in those subjected to very high temperatures, shall be prolonged or
extended, and at the same time to effect an economy in the fuel burned; and
also to provide a bar which, when in action, will produce less clinker, and will
not burn, and furthermore can be readily cleaned if clinker does form.
A fire bar according to this invention presents in section a headed or bulbous
bar, with the upper portion of the head rounded off at each side (and preferably
being flat in the centre), and a web comparatively narrow and deep, and of
tapering form.
Such a bar according to this invention is illustrated in the annexed drawing:
which illustrates in side elevation in Figure 1, and in cross section in Figure 2,
the form above specified, and other characteristics of the bar.
The bar illustrated in Figure 1 is one of about 2ft. 8 inches long, and is shewn
to the scale given in connection with it; while its section-shewn in Figure 2-
is to the scale shewn in connection with it. In different lengths of bars, the
proportions of parts will vary somewhat; and the sizes and distances apart of
the bars when used for large coal and small coal, will differ; the spaces between
them in the latter case, being less than in the former.
Referring to the drawing, a represents the bulbous portion or head of the bars,
and are the thin or narrow webs. The upper corners of the head a, as shewn,
are rounded off, and the part at which the web merges into the head, is also
rounded off or curved gradually. By these constructions the air for burning the
fuel on the grate in passing up between the webs will flow without eddying or
impediment through the spaces between the bars, and when past the largest
portion of the heads a-that is the restricted space between these heads-it will
freely pass to the fuel above, and will spread over the rounded upper angles and
be well distributed throughout the fuel on the bars as a whole. And the webs
being thin and deep, they will easily be kept cool by the air, and so the tem-
perature of the head portion will be prevented from becoming overheated.
In the centre of the bar, on the head portion a, are distance pieces c, the upper
surfaces of which are below the level of the upper surface of the bar, and also
rounded off, thereby enabling the slicer or cleaning tool to be more readily run
along the bars between them, without obstruction, and so rendering the opera-
tion of cleaning the grate easy and quickly performed. The sides of these
distance pieces are also preferably tapered downwards, as shewn.

page_text: By the constructions and combinations of bars as specified, the objects and
effects above referred to are accomplished.
Dated this 28th day of September 1899.
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents 15, Water Street, Liverpool.
improvements in Fire bars.
I, BENJAMIN DRAPER, of Knowsley Grove, Liverpool, in the County of Lan-
caster, Engineer, do hereby declare the nature of this invention, and in what
manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention has for its object to provide improvements in connection with fire-
bars, by which the length of life of the fire bars in furnaces, and more especially
in those subjected to very high temperatures, shall be prolonged or extended,
and at the same time to effect an economy in the fuel burned; and also to
provide a bar which, when in action, will produce less clinker, and will not
burn, and furthermore can be readily cleaned if clinker does form.
A fire bar according to this invention presents in section a headed or bulbous
bar, with the upper portion of the head rounded off at each side (and preferably
being flat in the centre), and a web comparatively narrow and deep, and of
tapering form.
The bar according to this invention is illustrated in the drawing accompanying
my Provisional Specification, which illustrates in side elevation in Figure 1, and
in cross section in Figure 2, the form above specified, and other characteristics
of the bar.
The bar illustrated in Figure 1 is one of about 2ft. 8 inches long, and is shewn
to the scale given in connection with it; while its section-shewn in Figure 2-
is to the scale shewn in connection with it. In different lengths of bars, the
proportions of parts will vary somewhat; and the sizes and distances apart of
the bars when used for large coal and small coal, will differ, the spaces between
them in the latter case, being less than in the former.
Referring to the drawing, a represents the bulbous portion or head of the bars,
and are the thin or narrow webs. The upper corners of the head a, as shewn,
are rounded off, and the part at which the web merges into the head, is also
rounded off or curved gradually. By these constructions the air for burning the
fuel on the grate in passing up between the webs will flow without eddying or
impediment through the spaces between the bars, and when past the largest
portion of the heads a-that is the restricted space between these heads-it will
freely pass to the fuel above, and will spread over the rounded upper angles and
be well distributed throughout the fuel on the bars as a whole.. And the webs
being thin and deep, they will easily be kept cool by the air, and so the tem-
perature of the head portion will be prevented from becoming overheated.
In the centre of the bar, on the head portion a, are distance pieces c, the upper
surfaces of which are slightly below the level of the upper surface of the bar, and
also rounded off, thereby enabling the slicer or cleaning tool to be more readily run
along the bars between them, without obstruction, and so rendering the opera-
tion of cleaning the grate easy and quickly performed. The sides of these
distance pieces c, shewn in the drawings, are tapered downwards, but they may
be of circular or any other suitable form, and considerably larger than those
shewn.

page_text: By the constructions and combinations of bars as specified, the objects and
effects above referred to are accomplished.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed, I declare that what I claim is :-
1. The fire bar of the form and construction substantially as set forth and
as shewn in the drawings.
2. The fire bar comprising the bulbous part or head a, the web b, and the pro-
jecting parts c, disposed below the level of the head; all constructed and arranged
particularly as herein set forth with reference to and shewn in the drawings.
Dated this 28th day of June 1900.
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents 15, Water Street, Liverpool.
CHEESBROUGH & ROYSTON,
Applicant's Patent Agents 15, Water Street, Liverpool.