Improvements in Furnace Bars and other Fire Bars.
Year: 1893

page_text: Date of Application, 9th Mar., 1893-Accepted, 22nd Apr., 1893
COMPLETE SPECIFICATION.
Improvements in Furnace Bars and other Fire Bars.
I, JOSEPH WILLIAM GOODREDS, of Upper Church Lane Foundry, Tipton,
Staffordshire, Ironfounder, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This invention consists of the herein described improved construction of furnace
bars and other fire bars whereby I obtain a more perfect combustion enabling much
cheaper slack to be used than is possible with ordinary fire bars.
I will describe my invention by referring to the accompanying drawing on
which
Fig. 1 is a plan of three fire bars constructed according to this invention;
Fig. 2 is a cross sectional elevation of the same on line X X of Fig. 1 ;
Fig. 3 is a side elevation of one of the said bars and
Fig. 4 is a plan of the same three bars arranged slightly differently to those
shewn by Fig. 1.
The same letters of reference indicate the same or corresponding parts in all the
figures.
A fire bar constructed according to my invention has cast in its top face a series
of V-shaped air inlet slots, marked a at short distances apart pointing away from
the fire door. The fire door would be at the left hand end of the bars shewn upon
ny drawing. Each of these V-shaped slots a forms the top of two inclined air
passages at the sides of the bar. These inclined air passages on one side of the bar
are marked and those on the other side thereof are marked 2. By an examina-
tion of my drawing it will be seen that the air passages b¹² gradually increase in
size towards the sides of the bar and they incline downwardly and backwardly at
both sides of the bar towards the fire door end. When the fire bars above
described are in use and the fuel is burning thereon the currents of air in rushing
up from under the bars through the air inlets and V-shaped slots a meet at the
points of the V-shaped slots and thus cause a thorough combustion of fuel on the
bars themselves (on which the fuel is usually dead) so that the fuel is properly
consumed over the whole area of the furnace and smoke prevented.
I find that if the V-shaped slots a are arranged about one and a quarter inches
apart this gives very good results in practice but it is to be understood that I do
not limit myself to any particular number or proportions of the said V-shaped
slots a and side passages bb.
I prefer to so arrange the bars in the furnace that the air inlets 662 in every
alternate bar come opposite the solid spaces between the air inlets 6' 6² in the
adjacent bars thus forming a uniform distribution of the air inlets in the furnaces,
but as an alternative arrangement the bars may be arranged as shewn in Fig. 4 so
that the air inlets 16 in every bar come opposite to the air inlets in the adjacent
bars.
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 :-
The manufacture and use of furnace bars and other fire bars each having a series
of V-shaped air slots across its upper surface communicating with inclined air inlet
passages in each side of the bar, arranged substantially as hereindescribed and
shewn upon the accompanying drawing, so as to cause currents of air to rush up
through the slots in each bar and to be inclined towards each other and meet on

page_text: the top of the bar and thus effectually consume the fuel thereon, as hereinbefore
set forth.
Dated this 8th day of March 1893.
CHARLES BOSWORTH KETLEY,
Agent for the Applicant.