Improvements in Fire Bars.
Year: 1892

page_text: Date of Application, 8th July, 1892
Complete Specification Left, 8th May, 1893-Accepted, 1st July, 1893
PROVISIONAL DIUITIVATION
Improvements in Fire Bars.
We, CHARLES JONES of Holywell. Flintshire, Ironfounder and ROBERT
THOMAS of Bryn Offa, Holywell, Flintshire, Estate Agent and Scrivener do
hereby declare the nature of this invention to be as follows:-
This invention relates to an improved construction of fire bars, and has for its
object to provide a bar which will not be liable to become bent or crooked or to be
burnt and which will prevent the formation of clinker, and produce more perfect
combustion than the fire bars now in use.
This bar consists of two main parts, one somewhat after the usual form of fire
bars, the other a protector placed on top of the first. The fire bar proper consists
of two sections, fastened together with bolts, screws or rivets or in any other
suitable manner, each part channelled throughout its length on the inner side, so
that when fixed together a passage extends throughout the bar, and the two sides
not meeting closely a fissure is formed from top to bottom. At the front end of the
fire bar the passage is enlarged and of a circular form, which serves for the reception
when desired of a nozzle from a blower or other blast creating machine. This
passage or fissure causes a current of cool air to traverse the bar and rise vertically
upwards into the furnace. This current of air by constantly traversing the bar
keeps it from getting overheated.
The protector consists of a round rod or tube of wrought iron of about the same
length as the bar and fixed loosely thercon, either by means of bolts at each end, or
by stops cast on the ends of the bar, preventing it slipping forwards or backwards.
When bolts are used a slot or slots should be provided at one or both ends through
which the bolts should pass, allowing for the expansion of the metal.
Each section of the bar may, if desired, have holes at intervals throughout its
entire length to assist the draught, and the protector, if hollow, may be provided
with holes at equal intervals so that a portion of the air rising through the bar may
Bars constructed
circulate in the protector, and thus help to keep it cool.
according to this invention will be inexpensive as the parts are of simple con-
struction and the bar is much lighter than those ordinarily used, requiring less
metal. The protector can be made of any rough scrap iron, solid or tubular. The
bar is kept thoroughly cool by reason of the current of air continually passing
throughout its length thus keeping it straight, instead of as in the ordinary form,
bending by reason of the great heat on top and the draught of cold air at the lower
side. The burning that usually obtains will also be obviated as the heat never
attains the same degree.
The current of air passing upwards into the furnace between the bar and
protector is heated before it enters the fuel, and thus keeps the matter which
usually forms clinkers in a liquid state, allowing it to drop into the ash-pit. The
air thus supplied also ensures more complete combustion, as there is a constant
supply along the whole length of the bar. This bar is especially applicable for use
with a blower in crucible furnaces of all kinds, instead of employing tall chimneys
as at present. To render them suitable for blast furnaces, the space below the
nozzle hole and whole of the lower side of the permanent fire bar should be filled
with fire clay or other fire proof cement, the nozzle of the blower being inserted in
the hole at the end above described and fixed-with clay or cement.
Should the protector become bent it can be taken out, straightened and replaced
in a few minutes.
n
11
1
T. 1000

page_text: COMPLETE SPECIFICATION.
Improvements in Fire Bars.
We, CHARLES JONES of Holywell, Flintshire Iron Founder, and ROBERT
THOMAS of Bryn Offa, Holywell, Flintshire, Estate Agent and Scrivener, 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 relates to an improved construction of fire bars, and has for its
object to provide a bar which will not be liable to become bent or crooked or to
be burnt, and which will prevent the formation of clinker and produce more perfect
combustion than the fire bars now in use. This bar consists of two main parts, one
somewhat after the usual form of fire bars, the other a protector placed on top of
the first. The fire bar proper is formed of two sections fastened together by bolts,
screws or rivets or in any suitable manner, each part channelled throughout its
length on the inner side, so that when fixed together a passage extends through the
bar, as hereinafter more particularly described.
In order that the invention may be more clearly understood, reference is had to
the accompanying sheet of drawings, in which
Fig. 1 is a side elevation of the complete fire bar, Fig. 2 a plan and Fig. 3 a
sectional plan of the same, Fig. 4 a side view of one half of the bar, Fig. 5 a
vertical section and Fig. 6, 7, & 8 cross sections, showing different forms of
protector.
A, A are the two parts or sections of the permanent fire bar, fastened together
by the bolt a, a fissure being allowed to be formed between the faces of the sections
from top to bottom and extending through the whole or the greater part of its
length. Each part is formed with a channel b on its inner face, forming, when the
parts are connected, a passage B through the bar, for the purpose of allowing a
current of air to traverse the bar and escape into the furnace, through the fissure
above mentioned. The current of air by constantly traversing the bar keeps it
from getting overheated. In suitable cases air may be supplied to one end of this
passage, which may be slightly enlarged, through a nozzle C of a blower or air
supplying apparatus, or when tubular protectors are used, the nozzle may be
inserted in the protector, as shown in dotted lines in Fig. 5, the latter being
furnished with holes on the upper surface along their entire length, to permit
access of the blast to the furnace. This arrangement of blower is particularly
applicable to marine boilers. The protector D consists of a rod or tube of iron, of
any suitable form, but preferably cylindrical, fixed or supported loosely on top of
the fire bar. The latter is furnished with lugs E at each end and in some cases
small stops e which serve to hold or retain the protector in position without firmly
fixing it. A method of attaching the protector in which bolts are employed is
shown in Fig. 5. A slot d is formed at each end and the bolts d' are passed
through the same, and through the bar being fastened loosely by a nut at the
bottom. The slots d allow of the expansion of the protector in a different ratio to
that of the bar. Fig. 8 shows the protector of tubular form, Fig. 7 as a solid rod,
and Fig. 8 of square form with central passage. A number of grooves b¹ may be
furnished in the inner face of each section, forming small passages leading from
the central passage B, in order to assist the draught.
The protector, if tubular, may also be furnished with corresponding holes d
allowing a portion of the current of air to pass through the protector and help to
keep it cool.
Bars constructed according to this invention will be inexpensive, as the parts are
of simple construction and the bar is much lighter than those ordinarily used,
requiring less metal. The protector can be made of any rough scrap metal. The
bar is kept thoroughly cool by reason of the current of air continually passing

page_text: through, thus keeping it straight instead of as in the ordinary form allowing it to
bend, by reason of the great heat on top and the draught of cold air at the lower
side. The burning that usually obtains will also be obviated as the heat never
attains the same degree.
The current of air passing upwards into the furnace between the bar and
protector, is heated before it enters the fuel, and thus keeps the matter which
usually forms clinkers in a liquid state, allowing it to drop into the ash pit. The
air thus supplied also ensures more complete combustion as there is a constant
supply along the whole length of the bar. This bar is especially applicable for
use with a blower in crucible furnaces of all kinds, instead of employing tail
chimneys as at present. To render them suitable for blast furnaces, the space
below the nozzle hole, and whole of the lower side of the permanent fire bar (if the
nozzle is fitted to the latter) should be filled with fire clay or other fire proof
cement, the nozzle of the blower being inserted in the hole at the end above
described, and fixed with clay or cement. If the nozzle is fitted to the protector,
the filling up of the lower side of permanent bar will not be required. Should
the protector become bent it can be taken out, straightened and replaced in a
few minutes.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
(1) A fire bar formed in two parts, bolted or otherwise fixed together face to
face, a vertical fissure being allowed between them, each part having a channel on
its inner face, forming, when connected, a longitudinal passage through which a
current of air is passed, escaping through the fissure, substantially as described and
for the purposes specified.
(2) A fire bar formed in two parts fixed together having a passage and fissure
formed between them, the bar carrying on top a loosely held protector, formed by a
rod or tubular piece of iron, the passage and fissure allowing a current of air to
pass around or through the protector, substantially as and for the purposes
specified.
(3) A fire bar formed in two parts fixed together and having a passage and
fissure formed between them, carrying on top a protector formed of an iron tube
loosely connected by a bolt passing through the bar and fastened from the bottom,
slots being formed in the tube to allow of expansion, substantially as and for the
purposes specified.
(4) A fire bar formed in two parts A, fixed together and having a passage B
and fissure formed between them, and small holes 61, carrying a protector D loosely
fixed by bolts d' and furnished with holes d² corresponding to the holes 6 in bar,
ensuring a current of air passing to the required parts, the passage B having the
nozzle of the blower fitted to it, substantially as described and shown, and for the
purposes specified.
Dated this 8th day of May 1893.
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.