MENTS IN FIRE-BARS
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by the said Christopher James at the
. Office of the Commissioners of Patents on the 20th February 1878.
CHRISTOPHER JAMES, of No. 4, Alexandra Road, Clifton, near Bristol.
MENTS IN FIRE-BARS."
" IMPROVE-
This Invention has for its object improvements in fire-bars.
I build up fire-bars in wrought iron in the following manner :- -The two sides or
outer cheeks of the fire-bar I form of two thin but broad bars rolled either parallel
or taper; these are connected the one to the other by bolts or rivets several inches
in length, and on the bolts or rivets several narrower bars are threaded with washers
between the bars to preserve spaces for the passage of air to the fuel; these inter-
mediate bars should be of a taper section. In this arrangement the side bars or
cheeks afford all the stiffness requisite, and very light bars will suffice for the
intermediates. The side bars or cheeks are bevilled off on the under side towards
either end where metal may be removed without lessening the strength.
As a modification the bolts or rivets may be made to project through the cheeks
to carry one of the lighter bars on the outer side.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Christopher James in the Great Seal Patent Office on the 19th August
1878.
CHRISTOPHER JAMES, of No. 4, Alexandra Road, Clifton, near Bristol. "IMPROVE-
MENTS IN FIRE-BARS."
This Invention has for its object improvements in fire-bars.
I build up fire-bars in wrought iron in the following manner:-The two sides or
outer cheeks of the fire-bar I form of two thin but broad bars rolled, either parallel
or taper; these are connected the one to the other by bolts or rivets several inches
in length, and on the bolts or rivets several narrower bars are threaded with washers
between the bars to preserve spaces for the passage of air to the fuel; these inter-
mediate bars should be of a taper section. In this arrangement the side bars or
cheeks afford all the stiffness requisite, and very light bars will suffice for the
intermediates. The side bars or cheeks are bevilled off on the under side towards
either end where metal may be removed without lessening the strength.
As a modification the bolts or rivets may be made to project through the cheeks
to carry one of the lighter bars on the outer side.
In order that my said Invention may be most fully understood and readily
carried into effect, I will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a longitudinal section, and Figure 2 is a transverse section of a
compound fire-bar, constructed and built up in accordance with my Invention.
A, A, are the two sides or cheeks of the fire-bar; B, B, are bolts or rivets passing
through the cheeks A, A, and also through the intermediate narrower and lighter
bars C, C, which are of a taper section. The bars C, C, are kept at suitable distances
apart by the washers D, D, which have a taper corresponding to that of the bars C, C.
The bolts or rivets B pass also through the washers D and serve to hold all the parts
firmly and rigidly together.
Figures 3 and 4 are transverse sections of other fire-bars, in which a larger
number of intermediate bars C and washers D is employed.
Figure 5 is a transverse section of a fire-bar, in which one of the lighter bars C
is carried upon the bolts or rivets B on the outer side of each of the cheeks A.
These bars are economical in construction. By admitting air more freely to the
under side of the fire, they burn the fuel more effectually and thereby greatly
diminish, and in most cases quite prevent the formation of smoke, being especially
advantageous in burning bituminous coal; they greatly diminish the formation of
clinker; they are durable, being kept cooler from allowing a larger volume of air
to pass by them, and are only about one-third the weight of ordinary cast-iron bars.
Having great lateral stiffness they are not liable to twist or get out of position.
The washers may be rolled on to side and intermediate bars, but the use of
separate washers is more convenient.
Having thus described the nature of my said Invention and the manner of
performing the same, I would have it understood that I claim, the construction of
fire-bars, substantially as described and represented in the annexed Drawings.
In witness whereof, I, the said Christopher James, have hereunto set my
hand and seal, this Fifteenth day of August, in the year of our Lord One
thousand eight hundred and seventy-eight.
CHRISTOPHER JAMES. (LS.)