Improvements in or relating to Furnaces.
Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c. Act, 1883) as allowed by
the decision of the Comptroller General of the 21st day of December, 1897.
Date of Application, 4th Jan., 1897-Accepted, 27th Mar., 1897
Improvements in or relating to Furnaces.
I, WILLIAM LOUIS GILDER of 14 Private Road Hill Top, Attercliffe,
Sheffield, in the County of York, 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 improvements in furnaces, applicable with particular
advantage to the furnaces of steam-generators, its object being to construct them so
that proper combustion of the fuel is brought about by regulating in the manner
hereinafter described the air and steam, or other gases admitted to it.
In the accompanying drawings
Fig. 1 is an elevation of the front of a steam boiler fitted with improvements
according to this invention;
Fig. 2 being a vertical section of the same passing through the centre of one of
the two furnaces;
Fig. 3 is a sectional part plan of the same boiler the section passing through the
flues above the grate level.
Like letters indicate like parts throughout the drawings.
A is the front plate of the boiler B. C is a pipe provided with suitable valves
or cocks C¹ C³, and extending down the front plate from the steam space and
branching at the bottom to communicate with the tubes D in the ash-pit; these
tubes pass through the bridges E of the furnaces into the chamber F which opens,
by openings placed at a suitable angle to the flues G, the openings being
preferably directed away from the bridges so that the current from the openings
mingles with the gases at the backs of the bridges.
Each furnace has a front dead-plate H in which are apertures H' for conveying
air to the front ends of the grates. Beneath each plate H is a sliding frame or
grid H for the regulation of the passage of air through the apertures H¹ to the
front part of the fires. Beneath each grid is a lever K movable in a horizontal
frame and having its fulcrum K in the lower side of the dead-plate; each of these
levers engage with a pin H3 attached to the corresponding sliding frame or grid H³.
The levers K are connected by a bar K2 to which is attached a small plate K³
slotted to engage the handle C³ of the valve C³. At the front of the boiler, in the
plate A are formed openings L for the purpose of enabling the ashes to be with-
drawn from the ash-pit and air to be admitted thereto; from each dead-plate H
depends a baffle plate H across each ash-pit so that air rushing in the openings L
is partly intercepted by the baffle plates some of it going to the under side of the
bar H and some of it passing up the apertures H₁ to the front of the fire. After
the furnaces are fired, steam is admitted from the pipe C to the tubes D and carries
with it a quantity of air into chambers F from which having been heated in its

page_text: passage through the tubes and the chamber is delivered at the backs of the bridges
through the openings F1; whilst the steam and air are thus passing through the
tubes D and the bridges, air is admitted through the openings L of the
apertures H to the front of the fire and also to the under side of the bars H5 thus
the steam, air and other gases are mingled at the back of the bridges E and perfect
combustion ensues in the flues. After a time the grids H2 and the steam supply
pipe C are gradually closed either by hand or automatically, say by cataract-gear;
when the steam and air are out off at the front of the fire as described, the furnaces
citain natural draught through the apertures L by way of the ash-pit and also
from the tubes D to the backs of the bridges.
This invention is not limited to the arrangement herein before described by way
of example; for instance, the number of tubes D in the furnaces can be varied or
they may be carried above the fires passing down into the bridges.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
-
1. In a furnace of the kind described regulating the admission of air to the front
cf the fire and of steam and air or other fluid to the back of the bridge, substantially
as and for the purpose described.
2. In a furnace of the kind described, the combination with a dead-plate such
as H. having suitable apertures of a sliding frame such as H with or without the
baffies substantially as and for the purpose described.
3. In a furnace of the kind described, the combination with air valves in the
dead-plate of a steam supply nozzle having a cock operatively connected with
the valve in the dead-plate and adapted to be controlled manually or mechanically
for the purpose described.
4. The combination and arrangement of parts constituting the complete steam-
generator furnaces substantially as described and illustrated in the accompanying
drawings.
Dated this 2nd day of La
100%
WILLIAM LOUIS GILDER.
Boult & Wade,
Agents for the Applicant.