Improvements in the Manufacture of Hollow Fire-bars.
Year: 1888

page_text: Date of Application, 28th May, 1888
Complete. Specification Left, 28th Feb., 1889
Complete Specification Accepted, 30th Mar., 1889
Improvements in the Manufacture of Hollow Fire-bars.
We WILLIAM NEEDHAM FRANK NEEDHAM CHARLES NEEDHAM HARRY NEEDHAM
of the Borough Foundry Barnsley in the county of York, Iron Founders, and
CHARLES WOMACK, of 74 Milnrow Road Rochdale in the county of Lancashire
Innkeeper do hereby declare the nature of said invention for IMPROVEMENTS IN THE
MANUFACTURE OF HOLLOW FIRE-BARS, to be as follows:-
Our invention relates to the manufacture of hollow fire-bars where such bars are
composed of cast-iron, cast steel or other similar cast material, and the object of our
present invention is to manufacture the said bars in such a manner that they become
more refractory and durable than fire-bars manufactured in the ordinary way, to
attain this we cast the said fire-bars face downwards (the face meaning the upper part
of the bar whereon the incandescent fuel or fire is placed) upon a chill plate composed
of cast-iron or other suitable material.
.
Our process of manufacturing or casting the said hollow fire-bars is as follows:
The model used for the purpose of forming the mould wherein is to be cast the
hollow fire-bar is first placed in a suitable position with its face upon the hereinbefore
described chill plate, after which the mould box is placed in a suitable manner over
the said model, then suitable moulding sand is used and rammed up in the usual way.
The mould box having the model therein is then lifted by any suitable means from the
chill-plate and where preferred turned over. A suitable core for forming the hollow
space within the bar is then fixed on suitable core seats within the mould, and the
mould box is again turned over and placed or fixed in its original position upon the
chill-plate. After which operation it is cramped together in the usual way. The
mould is then made ready for receiving the molten metal which is poured therein in
the ordinary manner or in any other suitable way. It will be well understood that
the essential part of our present invention consists in chilling the faces of cast hollow
fire-bars by which means the same become more refractory and are therefore more
durable than those heretofore in use.
1
1000

page_text: Improvements in the Manufacture of Hollow Fire-bars.
We FRANK NEEDHAM, CHARLES NEEDHAM, WILLIAM NEEDHAM and HARRY
NEEDHAM of the Borough Foundry Barnsley in the County of York Iron-founders,
and CHARLES WOMACк of 74 Milnrow Road Rochdale in the county of Lancashire
Innkeeper 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 the manufacture of hollow fire-bars which are more
especially used in steam generator furnaces but may be adapted for other furnaces a
desired and which bars are composed of cast-iron cast-steel or other similar-cast.metal.
and the object of this invention is to render the said fire-bars more refractory or
capable of resisting a greater amount of heat than is the case with hollow fire-bars
manufactured in the ordinary manner. To attain this we employ the process hereinafter
fully described and-illustrated by means of the drawings annexed.
Fig. 1 is a longitudinal elevation of a model for a hollow-fire-bar and fig. 2 is a
cross sectional elevation of the same.
Fig. 3 is a cross sectional elevation of a chill-plate with a model of a bar placed
thereon.
Fig. 4 is a cross sectional elevation of a chill-plate with a model and a mould box
placed thereon and showing moulding sand rammed or pressed therein.
Fig. 5 is a cross sectional elevation of chill-plate mould box with sand showing the
whole inverted the model removed and a core resting in suitable position within the
mould.
Fig. 6 is a cross sectional elevation same as fig. 5 only brought back to original
position and clamped or bolted again to chill-plate and illustrates the mould receiving
molten metal from an ordinary ladle.
Fig. 7 is a longitudinal elevation of a hollow fire-bar when cast and fig. 8 'is a cross
sectional elevation of the same. Like letters designate similar parts in each figure.
The model A figs. 1 and 2 used for the purpose of forming the mould A¹ fig. 6
wherein is cast the bollow fire-bar B figs. 7 and 8 is first placed in a suitable position
with its face a upon the chill-plate fig. 3 which is made with a beading a for
forming a groove in face of bar as herein after described after which the mould box D
fig. 4 is placed or arranged in a suitable manner over the model A the plate C and
box D are then clamped together with bolts after which suitable sand or other.
moulding material E is placed within the box D and over the model A and rammed
or pressed down or compressed in the usual manner. The mould-box D having the
model therein is lifted by any suitable means and removed from the chill-plate C the
bolts g being released previously for the purpose and then when preferred the said
mould box D is turned over or inverted to position shown at fig. 5 after which the
model A is removed therefrom and a suitable core a for forming the hollow space
within the bar is fixed or rested on suitable core pins or core seats within the
mould A' then the mould box D is again turned over that is back to its original
position upon the chill-plate C-see fig. 6: After the said operation the mould-box D.

page_text: and chill-plate Care again clamped together by means of the bolts g g or in any
other way. The mould A¹ fig. 6 is now ready for receiving the molten metal h which
is poured therein by means of an ordinary ladle J or in any other manner.
After the said hollow bar B has been cast or moulded in the manner before
described it may be removed from the mould box in the usual way after it has become
sufficiently cool for the purpose and then fettled or. trimmed as required. By means
of casting the face of the hollow bar B upon or against a chill-plate C in the manner
described the said face becomes harder as will be well understood and is found thereby
to consist of a more refractory nature and therefore to last longer when exposed to
fire or great heat than the face of a bar which has been manufactured in the manner
hitherto generallyemployed.
We find however that the faces and parts of hollow fire-bars which are exposed to
fire or flame may be still somewhat further improved in refractoriness by means of
chilling the top of inside of hollow portion of bar.
In this case we are aware that the inside of the hollow portion of bar is being at
present chilled by means of an iron core which becomes fixed therein and is therefore
practically a part or portion of said bar but in our case we prefer only to chill the top
part of the inside of hollow portion thereof and we perform this by means of placing
a chill-plate upon the core a when in position fig. 5 but which comes under the
core a when in position fig. 6 and essentially forms a portion of said core and which
is removed with said core after the hollow bar has been cast as will be well understood.
By this means the outside face of hollow fire-bar B is chilled by means of the chill-
plate Cas herein before described and the inside portion of bar which is situated
directly below said face is chilled simultaneously therewith by means of the chill-
plate not shown resting against the core so that the bar if not made too thick from
the face to the hollow part this portion thereof absolutely becomes chilled through.
We prefer to manufacture the bars B with a groove at formed on the face a Figs. 7
and 8.
By means of manufacturing hollow fire-bars in manner hereinbefore described the
same become more refractory and are therefore more durable when used for the
purpose required.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is:
1. In the manufacture of hollow fire-bars the use of a chill-plate C in the manner
substantially as described and for the purpose specified.
2. In the manufacture of hollow fire-bars the combined process substantially as
described and set forth in the drawings annexed.
3. The chilling of the faces of hollow fire-bars during the manufacture thereof in
the manner substantially as described and for the purpose specified.
4. The chilling of the faces of hollow fire-bars simultaneously with the chilling of a
portion of the hollow part thereof in manner substantially as described and for the
purpose hereinbefore set forth.
Dated this 25th day of February 1889.
H. F. BOUGHTON, M.I.M.E
Barnsley,
Patent Agent.