Improvements in Firebars or Furnace Bars, and in Foundry Devices for Use in Casting the same.
Year: 1894

page_text: Date of Application, 30th Jan., 1894
Complete Specification Left, 30th Oct., 1894-Accepted, 1st D:c., 1894
PROVISIONAL SPECIFICATION.
Improvements in Firebars or Furnace Bars, and in Foundry Devices
for Use in Casting the same.
I, JOSEPH MATTHEWS of 91 and 93 Northumberland Street, in the City of
Liverpool, Mechanical Engineer do hereby declare the nature of this invention to
be as follows:-
Fire bars at the present time are chiefly made of very hard metal. This is of
decided advantage as far as regards the top surface of the bar but is a disadvantage
of every other part, and where the bar is suddenly reduced in size near one end as
in some mechanical stoker bars, it is impracticable to make the bar at all of this
cheap metal, but soft metal has to be used which has the disadvantage of being
soft at the wearing surface.
Now my invention is designed to produce a fire bar which shall be intensely hard
on the top or wearing surface but of soft iron in the remaining parts, and one
therefore which is not liable to snap at a sudden lessening of its cross sectional
area such as exists with many mechanical stoker-bars
The invention mainly consists in casting the bars of good soft cast iron in the
usual manner, but in place of the top flask or box I use a flat tray of iron. This
flat tray has ribs above crossing it to strengthen it and is in open box form so as to⚫
hold water; it has two handles or holes for podgers at each end. The mode of
casting the bars is as follows:-A series of lower boxes or moulds in the sand are
formed, the parting being level with the top of the pattern bar. Two or more of
these trays are then placed over a similar number of these lower boxes and as each
set of bars in succession is cast and somewhat cooled, the tray is taken off that one
and carried to the next uncovered bars, and so on until the entire row has been
Some bars however which have rounded ends cannot be done easily in this
To obviate this, I form the pattern bar with a square projecting piece on
each side of the rounded part. Into the hole left by these projecting pieces, I
place the core hollowed out to form the actual shape of the bar required; the tray
can now rest over the entire length of the bar and the core.
cast.
manner.
Dated the 29th day of January 1894.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Patent Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Firebars or Furnace Bars, and in Foundry Devices
for Use in Casting the same.
1, JOSEPH MATTHEWS of 91 and 93, Northumberland Street, in the City of
Liverpool, Mechanical 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:-
Fire bars are chiefly made of very hard metal. This is of decided advantage as
far as regards the top surface of the bar, but is a decided disadvantage in every
other part, and in any place where the bar is suddenly reduced in size, such as near
one end in some mechanical stoker bars, it is impracticable to make the bar at all
of this cheap metal, but soft metal has to be used, which has the disadvantage of
being soft on the wearing surface.

page_text: Now my invention is designed to produce a fire bar which shall be intensely
hard on the top or wearing surface, but of soft iron in the remaining part, and one
therefore which is not liable to snap at a sudden lessening of its cross sectional area,
such as exists with many mechanical stoker bars.
The invention is best described by aid of the accompanying drawings, illustrative
of a bar such as used in the Vicars stoker.
In these,
Figure 1 is a side elevation ;
Figure 2, a plan; and
Figures 3, 4, 5, and 6, sections through A A, B B, CC, and DD, respectively.
In these E is a chill of cast iron flat at the bottom, and formed with ribs round
and across it so as to form vessels in which water can stand, F fire bar, G small
projections cast on the fire bar as spacing knobs, H cores placed in the side of the
mould so as to mould the knobs G. I, a core arranged so as to be able to mould
the projections J used for drawing in and out the bar in the Vicars stoker,
K another core used to enable the curved end of the bar to be cast.
The mode of casting the bars is as follows:-
A series of lower boxes or moulds in the sand are formed, the parting being level
with the top of the pattern. Two or more of the chills are then placed over a
similar number of these lower boxes and as each set of bars in succession is cast and
somewhat cooled, the chill is taken off that one and carried to the next set of
uncovered bars, and these are then cast, and so on until the entire row has been
cast. The chill E has holes cast in it, not shown in the drawings, (for podger bars)
at each end so as to more easily be lifted.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improved fire bar formed with side projections and other projecting parts
and webs of soft cast iron and top surface.chilled substantially as described.
2. In foundry devices for use in casting fire bars, the combination of the chill E
with or without holes for water and cores such as H, I, and K, whereby the bars
with projecting side or end pieces, or both, can be cast in the vertical form with a
chill chilling their upper surfaces.
Dated this 29th day of October 1894.
WM. P. THOMPSON & Co.,
Of Liverpool, Manchester, Birmingham, Nottingham, and London,
Patent Agents.