Improvements relating to Gas-regenerative Furnaces.
Year: 1896

page_text: Date of Application, 14th Mar., 1896
0016
Ma
+008
02-1
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PROVISIONAL SPECIFICATION.
Improvements relating to Gas-regenerative Furnaces.
We, EDWARD JOHNSON, Foreman Bricklayer, of Newburn Cottage, Lemington
on Tyne, and JOHN THOMPSON, Millwright, of No. 7 Store Street, Lemington
on Tyne, do hereby declare the nature of this invention to be as follows:-
The novelty of this invention consists in the method of applying a watersealed
valve for changing the direction of the current of the gas or air, when entering
into the separate flues.
For this purpose we use a valve or lid which covers only a part-preferably one
half of a chamber, divided by a partition into two compartments, each one
whereof is connected with a separate set of flues. This chamber and the partition
is provided along its upper edge with a trough holding water. The valve has a
projection which can be lowered into the watertrough and then closes the upper
opening of one compartment against gas or air entering.
When the valve is lifted and rotated into its other position and then is lowered,
the other compartment will be closed at the top, while the former compartment
will be open.
We make our compartment in plan either circular, oval, or of a polygonal or
irregular or oblong shape.
EDWARD JOHNSON.
JOHN THOMPSON.
Improvements relating to Gas-regenerative Furnaces.
We, EDWARD JOHNSON, Foreman Bricklayer, of Newburn Cottage Lemington
on Tyne, and JOHN THOMPSON, Millwright, of No. 7 Store Street, Lemington
on Tyne, 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 novelty of this invention consists in the method of applying a watersealed
valve for changing the direction of the current of the gas or air when entering
into separate flues:
In carrying this invention into effect we use a valve or lid which covers only
a part, preferably one half of a chamber divided by a partition into two
compartments, each one whereof is connected with a separate set of flues.
This chamber and the partition are provided along their upper edge with a
trough holding water, which provides the waterseal for the valve."
In order that our said invention may be readily understood and easily carried
into effect, we will proceed to describe the same with reference to the accompanying
explanatory drawing, which shows one form of application.

page_text: Figure 1 is a sectional elevation along the centre line.
Figure 2 is a sectional plan through EH V W.
Instead of a disc or throttle valve-sometimes called butterfly-valve, which can
be swung around a spindle, or instead of a sliding or a stepping valve, we prefer
to use a watersealed valve or lid, which can be made to rotate around a vertical
centreline, and which covers only a part-preferably one half-of a chamber divided
by the partition A into two compartments B and C, open at the top,-whereof B is
connected with the separate set of flues H, E, F leading to the furnace, and the
valve O acting as a damper upon the branch G of the chimney flue K. The com-
partment C is similarly and symmetrically connected with flues leading to the other
end of the furnace, and also with K through the branch flue I entering from the
side opposite to G.
The two compartments B and C and the partition A. separating them are
provided along their upper edge with a trough J bolding water. The valve P has
in plan the shape of the letter D, covers the compartment C, and by the
continuous D shaped projection L at its underside when dipping below M the
level of water in trough J, by means of a substantial waterseal it prevents any
leakage of gas or air between the space above P and the compartment covered
by it.
In order to effect the reversal, the valve P is lifted up until that portion of the
projection L which is above the partition A is quite clear above the top edges of
the watertrough J, and then the valve P is rotated through about 180 degrees, and
then is lowered upon J.
The formerly open compartment B is now covered in at the top, and the
compartment C is now open. To complete the reversal of the current of gas or
air through the flues and the furnace, the valve O should also at this time be
opened, and the valve at the C side corresponding to O should be closed. The gas
or air above P now enters through C and after having passed through the furnace
it comes through flue F and E and descending through G finds its way into the
chimney flue K.
On rotating the valve P as just described, but back into the position shown on
drawing, closing O, and opening the corresponding valve at C side, the gas or air
enters through B E and F into flue and furnace, and finally finds its way through
I into the chimney flue K.
To prevent the one sided valve P leaving its central position and its spindle its
vertical direction we use a steady pin fastened in the centre of trough J, and high
enough to guide the valve in its ordinary rotations; we also make the outline of
valve P with its projection L circular as shown in plan at N N, so as to cover the
water in trough J, leaving an opening corresponding in area to that of the fluc G ;
we also make use of the part for balancing the heavy D shaped part of P.
To facilitate removal of soot and dirt out of the watertrough, openings are
provided at S, to which from the outside of the case enclosing the valve small
removable troughs T may be attached, which also permit the waterlevel M being
kept at a constant height.
Figure 2 shows the trough to be circular with a portion across the centre, but
we do not restrict the application of our invention to the circular form, but
in certain circumstances we may make the trough J and corresponding to it
the outline of the valve P with its projection L either polygonal, oblong or
irregular.
We do not restrict the application of this system of watersealed valve to the
changing the direction of the current of gas or air entering into or emerging
from the flues leading to a gas-regenerative furnace, but may use it for reversing
the direction of the flow of steam or other gaseous products of metallurgical or
chemical processes.
The object of this invention is to provide an arrangement whereby leakage and
waste of gas or chimney draught may be prevented and overheating and injury
resulting therefrom may be lessened.

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:
1. A watersealed valve or cover with its trough, which in one position leaves
one compartment below it uncovered, while the top of the other compartment is
covered, and which valve when lifted and rotated into its other position and then
lowered into its waterseal, leaves the previously open compartment covered, whilst
opening the previously covered compartment,-substantially as and for the purpose
hereinbefore described and illustrated in the accompanying drawing.
2. The general arrangement construction and combination of the watersealed
valve and trough with its compartments partitioned and adapted for a gas-
regenerative furnace or other similar purpose.
Dated this 25th 1 of Nomemben 1906
EDWARD JOHNSON.
JOHN THOMPSON.