Year: 1887

page_text: Date of Application, 19th Sept., 1887
Complete Left, 19th June, 1888
Complete Accepted, 20th July, 1888
I, DENNIS MELLOR, of 92 Radford Boulevard, Nottingham, Engineer do hereby
declare the nature of this invention to be as follows :-
My improved furnace bar is made of iron or steel or other material suitable to be
employed for that purpose, and is constructed saddle shaped, thus forming a channel
open at the lower edge of the bar to convey air to or through the bridge. A wrought
iron or other plate may be attached to the lower edges of the bar, or the bar may be
inverted and pieces of iron or other material of suitable shape and size may be placed
upon the edges of the sides, which will make the top of the inverted bar resemble the
top of the original bar. The bars may be perforated with holes of any desired shape
at or near the top edge.
The bar may be constructed corrugated, reticulated, serrated, grooved, or toothed.
Any suitable air regulator may be employed at the bridge, or an arrangement
resembling Venetian blinds to regulate the amount of air passing under the furnace
may be attached to or if desired may be placed a little distance in front of these or
other bars. Jets of steam may be employed to better force air through the bars to
the rear of the furnace to aid the combustion of the gases.
At or near the centre of the furnace a bar of larger dimensions may be carried up
towards the top of the furnace. This may be made in one or more parts and be
perforated in any way found useful.
Dated this 19th day of September 1887
W. H. MUNNS,
Agent for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Furnaces and Furnace Bars.
I DENNIS MELLOR of 92 Radford Boulevard Nottingham 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 and by the following
statement-
My improved Furnace Bar is made of cast iron or steel or other material suitable
for that purpose and is constructed saddle shaped, thus forming a channel open at the
lower edge of the bar to convey air to or through the bridge. A wrought iron or
other plate may be attached to the lower edges of the bar, or the bar may be inverted
and pieces of iron or other material of suitable shape and size may be placed upon the
edges of the sides which will make the top of the inverted bar resemble the top of the
original bar. The bars may be perforated with holes of any desired shape at or near
the top edge.
The bars may be constructed corrugated reticulated serrated grooved or toothed.
Any suitable air regulator may be employed at the bridge, or an arrangement
resembling venetian blinds to regulate the amount of air passing under the furnace
may be attached to or, if desired may be placed a little distance in front of these or
other bars. Jets of steam may be employed to better force the air through the bars
to the rear of the furnace to aid the Combustion of the gases.
At or near the centre of the furnace a bar or bars of larger dimensions may be
carried up towards the top of the furnace this may be made in one or more parts;
and be perforated in any way found useful.
And in order that my invention may be more fully understood and carried into
practice I will now proceed to describe the same with reference to the accompanying
drawings in which my invention is illustrated. Similar letters of reference indicate
corresponding parts throughout.
Figure 1 is a longitudinal section of a fire box.
Fig. 2 is a front elevation slewing the air regulating device.
Fig. 3 is a plan of two reticulated bars.
Fig. 4 is a transverse section of a bar.
Figs. 5 and 6 are modifications of Fig. 4.
Fig. 7 is a side elevation of an enlarged furnace bar to be placed at or near the
centre of the furnace.
Fig. 8 is a transverse section of the same.
The furnace bar A is constructed with a channel B and forked ends C as shewn in
Figs. 3 to 6. The channel B may be either open as in Fig. 4 or closed by means of
a wrought iron or other metal bottom plate D suitably attached thereto as shewn in
Figure 5 or the furnace bar A may be inverted and a plate or plates of iron or other
material of suitable shape and size E may be placed thereon and affixed thereto in
any convenient manner as shewn in Fig. 6.

page_text: The furnace is provided with one or more enlarged furnace bars G as shewn in
Figs. 7 and 8 provided with a channel B. and if desired with a bottom plate D, or
inverted and provided with a top plate E similarly to the bars illustrated in Figures 5
and 6. The Channel B is for the purpose of conveying air through the furnace bars
to the back of the furnace where the same is discharged through the forked end C in
front of the bridge F as indicated by the arrows in Fig. 1 or the ends of the furnace
bars may open into a suitable channel built in the bridge and the air discharged
therethrough and ejected at the back of the said bridge if it is found convenient.
Any or all of the furnace bars may be perforated in any upper part thereof either
vertically horizontally or slantwise for the purpose of allowing air to mix with the
incandescent fuel and aid the combustion thereof. The enlarged bar G being similarly
perforated in any upper part thereof for the purpose of discharging air at the top of
the incandescent fuel.
The air regulating arrangement H consists of transverse metal plates pivotted at
their ends Jand provided with a chain or other suitable device for elevating at the
other extremity K for the purpose of regulating the quantity of air to be passed
through the chamber B in the furnace bars as follows:-When air is admitted into
the front of the furnace L and the regulator H closed the whole of the air is forced
through M, and made to pass through the chamber B of the furnace bars. If however
the regulator is slightly opened, part only of the air will pass through M and the other
part will pass through the opening of the regulator.
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
First. The construction of a furnace fitted with a regulator H, for regulating the
quantity of air to be passed through hollow furnace bars, the air being discharged in
front of the bridge F through the forked ends C of the Furnace bars or carried by a
suitably built channel through the bridge and discharged at the back of the said bridge
substantially as described and illustrated.
Second. The construction of a furnace with hollow bars A and enlarged hollow
bars G substantially as hereinbefore set forth and illustrated in the drawings.
Third. The construction of a regulator H for regulating the quantity of air to pass
through hollow furnace bars substantially as described and illustrated with reference
to Figs. 1 & 2.
Fourth. The construction of a cast metal furnace bar A with an open or closed
chamber B provided with forked ends C and perforated if desired substantially as and
for the purpose hereinbefore set forth and illustrated in Figs. 3 to 6.
Fifth. The construction of an enlarged furnace bar G provided with an open or
closed chamber B and perforated if desired substantially as and for the purpose herein-
before set forth and illustrated in Figs. 7 and 8.