Year: 1887

page_text: Date of Application, 13th Apr., 1887.
Complete Left, 7th Sept., 1887.
Complete Accepted, 11th Oct., 1887
H. GARDNER,
166, Fleet Street, London,
Agent for the said A. E. Scott.

page_text: An Improved Construction of Bars for Furnaces, Close and Open
Ranges, and Fire Places generally.
I, ARCHIBALD EDWARD SCOTT, of Glendale, Wanstead, Essex, Civil 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:-
The object of my invention, is to construct bars for furnaces, open and close ranges,
and fire places generally, of very thin metal, cast or otherwise, each bar tapering
preferably, to a chopper edge and is of considerable depth to ensure coolness and
draught.
By the thinness of the bar the top edge is not liable to be burnt or injured by
the fuel the bars have also a less affinity for the fuel to clinker or coke upon them.
My bar is narrow at top, say, only to inch thick and tapers either to a true
taper, a concave or a convex at the side or both sides to a chopper or other shaped edge
at bottom.
The annexed drawings show my invention, Figure 1 is a perspective view of a
furnace bar, the top edge A of which is from a finch to inch in thickness and
tapering down to a chopper shaped edge at bottom B, the depth of the web C being
say 12 inches and reaching far down into the ash pit so that the incoming air becomes
rarified while progressing upwards between two adjoining bars, see Figure 2, said
rarification increasing during such upward travel by the check it receives due to
expansion and the reduced space at the top of the bars until the air is converted into
a combustible gas, ready for consumption with the fuel and where by its combination
with the products from the fuel an intense heat is produced by the formation of fresh
gases which are consumed resulting in a reduction or total absence of smoke with a
comparatively slow draught.
I make the feather of taper form as at Figures 1 and 2 or parallel as at Figure 3 so
that the inflowing air of the ash pit may be divided into the pocket formed by the
feathers.
Figure 4 represents in section a couple of bars according to my invention for a
close range or an open range or open fire place, each of said bars being, say, of an
inch thick at top and about 6 inches deep in the web this tapering to a knife edge or
nearly so.
The very thin, yet deep bars may be of rolled metal or they may be cast (malleable)
if desired but I prefer them rolled for locomotive steam ship, or other furnaces where
a strong draught is found, because when so made are not so liable to be burnt at the
top as thick ordinary bars are and from the rush of highly heated air into the fuel and
its quick passage through it, there is less affinity for the fuel to clinker or coke
and consequently requires less attention. From the great depth of web, the lower
part is comparatively cold which tends to preserve the bars to their proper shape and
prevents buckling.

page_text: 1 am aware that furnace and grate bars have been made in almost every conceivable
degree of substance at the top and that such bars have been made with the lower
portions of a reduced thickness to allow the dust and small particles of fuel, consumed
and unconsumed, to fall through to obviate clogging, therefore I do not claim any
invention in a different thickness between the top and the bottom portions of a furnace
bar or of a bottom grate bar of close or an open range, or fire places generally but I
declare that what I do claim is :-
Making and using bars for furnaces and bottom bars for fire grates very thin at the
top edge with a deep web of taper form provided with feathers as and for the purposes
described and substantially as shown in the annexed drawings.
Y
1
Jade T
2001.
H. GARDNER,
166, Fleet Street, London,
Agent for the said Archibald Edward Scott