A FURNACE BAR & SMOKE CONSUMING FURNACE
Year: 1887

page_text: Date of Application, 18th Jan., 188
Complete Left, 12th Mar., 1887.
Complete Accepted, 15th Apr., 1887.
GEORGE DOUGLAS HUGHES and DOUGLAS HUGHES, Queens Foundry & Engineery
Works, London Road Nottingham Engineers. We do hereby declare the nature
of our invention for A FURNACE BAR & SMOKE CONSUMING FURNACE to be as
follows:-
The casting of a furnace bar of Hematite, Mallable or other tough cast iron
around a tube of Bessemer, Siemens or other tough Steel.
upon &
The construction of a furnace by means of these furnace Bars supported upon
adjustable bar bearers in such a manner that the furnace bar ends may be perfectly
free to expand or contract as may be required.
For the passing a regulated stream of air through the bars to keep them cool and to
cause the consumption of smoke by the intermixture of this air with the gasses from
the fuel at the Bridge.
GEORGE DOUGLAS HUGHES.
DOUGLAS HUGHES.

page_text: DAR AND
FURNACE and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
The casting of a furnace bar made from Hematite, Malleable or other tough cast
iron.
The metal is cast on or around a tube of Bessemer Siemens or other Malleable
Steel tube or Tubes.
The furnace bars may be made either straight Intervolute, or corrugated, serrated or
dogtoothed as shown in Figs. 1. 2 & 3.
The steel tube may be round, oval, rectangular or any other suitable shape or
form.
Fig. 3 shows the furnace bar of the serrated form in elevation Plan &
Section a. b. c. having the steel tube in the centre the tube in this case being oval.
We construct an adjustable bar bearer Fig 4. to suit any size of furnace or flue.
Fig. 5. represents a Longitudinal, Vertical section of a flue showing the furnace
complete the furnace bars are supported by means of the adjustable bearers, d. d.
which are so arranged that the furnace bars do not rest upon their ends but are left
perfectly free to expand and contract.
We construct a ventilating or respirator box e. attached to the front of the
furnace this box is provided with a hit & miss slide or with moveable shutters or doors
for the purpose of regulating the admission of air to the bars.
The slide or doors should be opened imediately after fresh fuel has been put on
the fire and closed when the fire has burnt up and the smoke & gasses have been
consumed.
The apparatus may be either under the control of the stoker as shown at e. Fig. 5,
or may he regulated by steam power, clock work, time metre or other suitable
power.
Fig. 7. shows the apparatus regulated by a time metre .c.
The bridge is constructed as shown at f. Fig. 5. the ends of the bars pass through
a cast iron box 9, and convey the air into the chamber the air is conducted by
means of the bridge . and the conductor plate K, so as to mix with the fuel gasses
and cause the consumption of the smoke and gasses.
Where the furnace is of such a length as to require Two or More lengths of bars we
construct an air box Fig. 6. at the junction of the bars for the purpose of passing the
air to the next length of bars and from thence to the bridge.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is
1st. The casting of furnace bars from Hematite Malleable or other tough cast irons
upon or around a hollow tube or Tubes made from Bessemer, Siemens, or other
Malleable Steel imparting great strength to the furnace bar by the internal Steel tube
and the strong tough cast iron.
2nd. The construction of adjustable bar bearers arranged so as to carry the furnace
bars independent of resting upon their ends and by this means allowing the furnace
bars to be perfectly free to expand and contract.
3rd. The construction of a ventilating or respirator box attached to the front of the
furnace for the purpose of regulating the admission of air to the bars together with an
air box at the junction of the bars when they are required to be of more than one
length.
4th. Finally we claim for the foregoing the construction of a furnace bar of great
strength toughness and durability also the construction of a Furnace fitted with these
hars and arranged as herein described and illustrated in the in the drawings insuring
the more perfect combustion of the coal or other fuel and the consumption of the
smoke & gasses therefrom and applicable to the furnaces of Steam Boilers or for any
other purpose for which a furnace may be required.
GEORGE DOUGLAS HUGHES.
DOUGLAS HUGHES.