Improvements in or relating to Furnaces.
Year: 1894

page_text: Date of Application, 22nd Feb., 1894
Complete Specification Left, 13th Nov., 1894-Accepted, 22nd Feb.. 1895
Improvements in or relating to Furnaces.
1 FREDERICK CHARLES CLARKE of Forest Road, in the Borough of
Nottingham, Furnace Bar Manufacturer, do hereby declare the nature of this
invention to be as follows:-
-
This invention relates to the improvements in fire bars for steam boiler and other
furnaces.
The upper surface of the fire bars is formed with alternate projectious and
recesses, the projections on each bar fitting into the recesses in the bars on each
side of it, sufficient space being left for the passage of air to the fuel. The
projections if preferred may also be formed with air passages extending from the
lower part to the upper face of the bars; the upper face of the bar may also be
chilled to increase its durability.
Each bar is formed with a longitudinal air passage extending throughout its
length and in furnaces of such a length as to require the bars to be divided into
two or more sections, the sections may be coupled together by independent couplings
or by forming the ends of the bars of one section to fit into the ends of the bars in
the next section.
The longitudinal air passage may be of any convenient shape in section, and the
fore end of each bar is preferably formed with an iuclined opening immediately
beyond the edge of the dead plate to admit air to the longitudinal air passage.
At the rear end the air passages are carried through the bridge or into a
hollow bridge in order to deliver the air at this point for the consumption of
smoke.
Below the dead plate is a lip plate extending from the front of the furnace to a
point beyond the openings in the fire bars, this is to assist the delivery of air to the
air passages in the bars. The opening in the front is preferably fitted with a door
so that the air may be shut off from the air passages in the bars when the fire has
burnt up and is making no smoke.
This door may be adapted to be automatically opened when the furnace door is
opened and closed again by an automatic arrangement, such as a piston in a cylinder
from which the air or fluid is allowed to escape gradually or a float in a tank, or
other arrangement for closing the door in a given period of time.
Dated this 22nd day of February 1894.
'
W. P. THOMPSON & BOULT,
Of London, Nottingham, Liverpool, and Manchester,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or relating to Furnaces.
FREDERICK CHARLES CLARKE, Russell Street Mills Forest Road Nottingham,
Engineer, do hereby declare the nature of this invention and in what manner the
0 same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This invention relates to improvements in fire bars for steam boilers, and other

page_text: G. Steam jet, or nozzle.
Fig. 2 shows plan of bars as fixed in. furnace, with angular tubes fitted to each
bar, as shewn by arrows, and marked in same manner as Fig. 1.
The special form and arrangement of fire bars shown on Sheet 2 of the
drawings is only given by way of illustration, and does not per se form part of the
invention.
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 angular tube as fitted with steam jet, or nozzle at back of bridge.
Dated this Eighth day of November One thousand eight hundred and
ninety-four
FREDERICK CHARLES CLARKE.