more Pieces.
Year: 1886

page_text: more Pieces.
I, THOMAS SELLARS of Weekday Cross in the town of Nottingham, Accountant,
do hereby declare the nature of this invention to be as follows:-
To make a built up hollow fire bar with outlets for the distribution of the blast
to the superposed fuel in such a manner that when the several pieces forming one
bar are put together, the bar will be complete in itself and a clear space from end
to end of the bar left for ash to drop into the ashpit.
To effect this, I place the projections required to form the blast apertures on the
inner side of the hollow bars instead of on the outside as has been done heretofore,
I also allow the blast to enter at a sharp angle upwards direct from the bar without
being directed through nozzles formed in the space between the two bara.
When the bars are made of cast iron I arrange that the pattern shall leave its
own.cores. When the bars are made of wrot iron or rolled steel, or wrot iron
and cast iron combined I either form a groove on the outside of the rolled bar and
drill the blast apertures, this groove will greatly facilitate the drilling operation, or
I form notches on the sides of the two parts of the bar which when placed together
give an upward tendency to the blast as before described.
By the foregoing method of construction I am enabled to make each bar com-
plete in itself so that it can be removed and replaced without.materially affecting
the working of the furnace.
THOMAS SELLARS,
12, Weekday Cross, Nottingham,
Accountant.

page_text: I, THOMAS SELLARS of Weekday Cross in the town of Nottingham Accountant
do hereby declare the nature of my invention for IMPROVEMENTS IN THE METHOD
OF FORMING THE OUTLET PASSAGES FOR BLAST IN HOLLOW FIRE BARS WHICH ARE
BUILT UP OF TWO OR MORE PIECES and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement:
My said Invention has for its object the making of built up hollow fire bars
with outlets for the distribution of the blast to the superposed fuel, in such a
manner that when the several pieces, which form one bar are put together the bar
will be complete in itself and not depending on the adjoining bar for the proper
formation of the blast outlets; the bars will thus be easily removed and replaced
singly, without disturbing those adjoining and a clear space will be formed between
the bars for ash to drop into the ashpit.
0
To effect this I place the projections required to form the blast apertures on the
inner side of the hollow bar, instead of on the outside as has been done heretofore,
I also allow the blast to enter the furnace at a sharp angle upwards, direct from
the bar without being directed through nozzles formed in the space between
the bars.
When the bars are made of cast iron I make the pattern of such a form that it
will leave its own cores.
When the bars are made of wrot iron or of rolled steel or of wrot iron and
cast iron combined I either form a groove on the outside of the rolled bar, and
drill the blast apertures, this groove greatly facilitating the drilling operation, or
I form notches on the sides of the two parts of the bar which when placed together
give an upward tendency to the blast as before described.
I am aware that bars of this description have been made with side nozzles and
also hollow bars cast in one piece with posts somewhat similar to those described
in this specification and I do not claim these as any part of my invention.
In order that this invention may be better understood I will now proceed to
describe it with reference to one sheet of Drawings which I have hereunto annexed
and the manner I carry the same into effect.
Figure 1 represents a cross section of a vertically jointed hollow fire bar formed
in two pieces having projections A cast on either half alternately with corre-
sponding recesses in the opposite halves into which these projections fit, thereby
forming the passages B through which the blast passes to the fuel in the direction
of the arrows The part marked B¹ can either be cast or rolled the whole length
of the bar or may be made a series of notches at suitable intervals where the blast
apertures are required. The cavities into which the projections A fit and the
passage marked B are formed by cores left by the pattern in the mould in which
the half bars are cast. When rolled iron or steel is used the part marked B' is

page_text: formed by the rolls and the passages marked B drilled at suitable intervals the
two halves of the bar in this case would not require to have projections, and the
top part would be jointed in the same manner as the bottom shown at A¹. Or, a
plain joint may be used in one or both.
Figure 2. represents a cross section of a hollow fire bar, the two parts being
joined horizontally the passages B being formed either in the upper or the lower
half of the bar or partly in both, the blast as in figure 1 taking the direction of
the arrows.
Figure 3 represents a cross section of a hollow fire bar jointed diagonally the
passage B being formed in a similar manner to that described in figure 1 but in
place of a projection being cast on the opposite half of the bar to fit the cavity, a
separate piece C which is shewn in elevation corresponding to the width of the
blast aperture is inserted and may be fixed rigid or may be partially loose and
luted, the object being to make the passage B of proper form. The passage shown
dotted and marked D is formed in the opposite half of the bar by taking out the
part marked D & D¹ with a core left in the mould by the pattern and the part D¹
is inserted as above described with reference to the separate piece C. The blast as
in figs. 1 and 2 takes the direction shewn by the arrows.
-
Figure 4 is a cross section of a hollow fire bar jointed horizontally, the part E, E,
is formed of thin strips bent as shewn. The notches B, B, for the blast apertures
being formed during the bending operation, or the top part of the bar may be of
cast steel or cast iron and these notches would be formed in the mould as described
in the other figures.
In forming the notches on the top part of the bar, as last described I would
prefer to continue the inner line of the top section as shown by the dotted lines F F,
and a section of the shape shewn may be rolled of wrot iron or steel and the
notches formed in a machine or by hand.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed I declare that what
I claim is
The method of forming the outlet passages for blast in hollow fire bars which
are built up in two or more pieces substantially in the manner described and
delineated.
And the method of constructing the various sections of a built up hollow fire
bar, substantially in the manner described and delineated.
DAL: ONL 1
1000