Improvements in Fire-bars and Furnace-grates.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Fire-bars and Furnace-grates.
I DAVID JOHN MORGAN M.I. Mech. E. and M.I.N.A. of Fitzbamon Embankment
Cardiff in the County of Glamorgan 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:—
This invention relates to those kind of fire bars and furnace grates which have
been described and illustrated by me in my former Specification numbered 3344 and
dated the 3rd day of March 1890 and the object of my present invention is to improve
upon the means therein described with reference to the arrangement for the final
locking of the fire bars and also to improve the forms or shapes of said bars so that
they are made stronger without it being necessary to add to their weight.
In order that my present improvements may be fully understood and readily
carried into effect I will proceed to describe the same and refer in so doing to the
accompanying drawings which are to be taken as part of this Specification and read
therewith.
Fig. 1 is a longitudinal sectional elevation of my improved fire bars and furnace
grate illustrating the final locking arrangement applied to the fore set of bars and
Fig. 2 is a front elevation of the same.
Fig. 3 is a longitudinal sectional elevation of my improved bars and furnace grate
showing the final locking arrangement applied to the aft set of fire bars.
Fig. 4 is a longitudinal sectional elevation of my improved furnace grate composed
of one set of fire-bars only and the final locking arrangement applied to the front end
thereof and
Figs. 5 and 6 are longitudinal sectional elevations of modifications of the system
illustrated at Fig. 4.
Figs. 7 and 8 are plans of my improved bars illustrating how the same may be cast
or made in twos threes or more together as desired.
Fig. 9 is a longitudinal sectional elevation of my improved furnace grate showing
the means of finally locking the bars arranged under the middle bearer.
Figs. 10 and 11 are longitudinal sectional elevations of my improved furnace grate
illustrating the fire bars constructed or formed to the special improved shape in
accordance with my present invention.
Fig. 12 is a longitudinal sectional elevation of my improved furnace grate
illustrating a means which may be employed for locking two or more bars together at
their ends and
Fig. 13 is a cross sectional elevation taken on line 2. z. of Fig. 12.
Fig. 14 is a longitudinal sectional elevation of portion of aft part of my improved
furnace grate illustrating a modified means of locking the fire bars at the bridge end
thereof.
Like letters of reference denote corresponding parts in each view.
Referring to Figs. 1 and 2 the bar A is made at its front end with a groove or
mortice a and a locking plate C slides underneath the dead plate D and is supported
upon suitable slides or projections d¹ which are made with or fixed to the sides E of
the furnace grate.
In Fig. 3 the bars A are finally locked under the aft or bridge end of the furnace
grate by means of the locking plate C which has one or more eye bolts c¹ secured to
it so that a rod may be applied under the grate from the front of the furnace in order
to remove the said plate C when required or to force or pull it into the locking
position shown.
With reference to Fig. 4 the furnace grate is composed of one set of furnace
bars A only and the fore ands thereof
ara looked he means of the plate

page_text: In Fig. 5 two locking plates C are employed one entering the fore ends and the
other the aft ends of the bars A and in Fig. 6 the bars A are locked by means of the
plate at the aft or bridge end only.
Referring to Figs. 7 and 8 the bars A are cast in twos threes or more together so
that by this means they are not so likely to be lifted up when the stoker pricks
between the same in order to break or remove the clinker and when such bars are
locked at the aft or bridge end as shown for instance at Fig. 4 they will not generally
require finally locking by the plate C at the fore ends thereof also.
'
In Fig. 9 I arrange the middle bearer e² so as to receive and support two locking
plates in order that the aft ends of the fore set of bars may be locked by one'
said plate C and the fore ends of the aft set of bars may be locked with the other
plate C as shown.
In order to strengthen my improved bar A without adding to its weight I either
make it in the arched form shown at Fig. 10 that is to say convex upon its face a
and concave at its underside a³ or I make it as shown at Fig. 11 that is to say convex
upon its face a³ and convex at its underside a³. It will be obvious that by making
the bars A in: the special forms shown at Figs. 10 and 11 they are considerably
stronger than bars of the ordinary form and of similar thickness and when placed. or.
fitted into the furnace grate they give a larger great area or surface within the same
limits than if the bars were of the ordinary flat face pattern.
Referring to Figs. 12 and 13 I form the dead plate D with a flange d¹ which
receives the fore ends of the bars A and whereon the said ends rest and in this
arrangement each bar A has a slot a' formed in its end in order to receive an iron or
steel bar H preferably square in cross section which is made any convenient length
so as to couple together two or more of the front ends of the bars A as shown at
Fig. 13 and I would have it understood that this arrangement may be applied to
either end of the bars A as shown at Fig. 12.
Referring to Fig. 14 the bridge plate d² is made with a flange d³ for the aft ends of
the bars A to, rest upon and the said ends of the bars A have slots or grooves a³ to
fit loosely upon the projections de which latter are either made with or fixed to the
bridge plate d².
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. In furnace grates the arrangement of finally locking the bars A by means
of the sliding locking plate C carried under the dead plate D upon the slides or
projections d substantially as described and illustrated at Figs. 1 and 2 of the
accompanying drawings.
2. In a furnace grate the use of a sliding locking bars C carried under the bridge
bearer d² in combination with the bars A substantially as described and shown at
Fig. 3 of the drawings hereunto attached..
3. In furnace grates the use of sliding locking bars C supported respectively under
the dead plate D and bridge bearer d² in combination with bars A made with mortices
grooves or slots a substantially as described and illustrated at Fig. 5 of the drawings
annexed.
4. In a furnace grate the use of sliding locking bars C supported under the middle
bearer d³ in combination with bars A having grooves a substantially as described and
illustrated at Fig. 9 of the drawings accompanying this Specification.
5. In furnace grates the use of furnace bars constructed in any of the forms shown
at Figs. 1. 3. 4. 5. 6. 9. 10 and 11 and cast together in twos threes and more
substantially as described and shown at Figs. 7 and 8 of the drawings attached
hereto.
6. Furnace bars A made with their upper surfaces or faces a² convex substantially
as described and illustrated at Figs. 10 and 11 of the accompanying drawings.
7. Furnace bars A made with their faces a² convex and their undersides a concave
substantially as described and shown at Fig. 11.

page_text: 8. In a furnace grate the use of furnace bars A made with slots or grooves a³ at
their ends in combination with the wrought iron or steel bar H and Hanged dead
plate or bearer D substantially as described and shown at Figs. 12 and 13 of the
annexed drawings.
9. In a furnace grate the use of fire bars A arranged with grooves a³ in combination
with a bridge plate d² having a projection d and under flange de substantially as
described and illustrated at Fig. 14 of the accompanying drawings.
Dated thie 17th day of September 1890.
H. F. BOUGHTON, M.I. Mech. E.,
Barnsley and Sheffield, Agent.