Improved Gas Valve for Blast Furnace Regenerative Stoves, applicable also to. Gas-fired Boilers.
Year: 1892

page_text: Date of Application, 14th Apr., 1892
Complete Specification Left, 14th Jan., 1893-Accepted, 18th Feb., 1893
PROVISIONAL SPECIFICATION,
Improved Gas Valve for Blast Furnace Regenerative Stoves,
applicable also to. Gas-fired Boilers.
JENKIN LEWIS 32 Stacey Road Roath Cardiff in the County of Glamorgan,
Engineer, do hereby declare the nature of this invention to be as follows:
--
My invention consists in a gas valve of improved construction for use chiefly in
connection with the regenerative stoves of blast furnaces; the valve in opening and
closing, respectively unites and severs the connection with the opening thro' which
the gas is conducted to the combustion flue; and in providing a valve with the
said object that shall combine fewness of parts, simplicity and cheapness of
construction with easy and expeditious means of being worked.
To attain the above advantages the valve is formed with a trunk and is arranged
to be moved backwards and forwards in a suitable casing or chamber. The end of
the trunk which emerges from the chamber is open, whereas the other end which is
at all times within the chamber, is closed or blind, and furnished with a proper beat,
so that when it is drawn against its corresponding seat in the chamber, the gas is
shut off. The chamber, in which the trunked valve has its movement, is made
proportionately larger than the trunk so as to admit of a suitable space all round
the trunk, to receive the gas from the end box which under all ordinary circum-
stances is in direct communication with the main supply. From the space referred
to, in the trunk chamber the gas passes thro' ports or perforations in the trunk,
into the interior of the trunk, afterwards passing thro' the open end of the trunk,
into the opening which communicates with the combustion chamber of the stove
or boiler.
It should be here explained that when the valve is drawn against its seat to shut
off the gas, the trunk which as before stated forms part of the valve, is, by the
same operation, withdrawn from the aperture which the valve has to feed and thus
severs the connection during the time the valve is closed, whereas the opening of
the valve causes the trunk, in its travel forward, to unite the valve with the aperture
to be fed, the connection thus remaining while the valve is open and the gas
turned on.
Modified forms of the valve may be made whereby the trunk may be worked
by a backward and forward movement for disconnecting and connecting purposes
only, and the gas may be turned on and cut off or regulated, by a turning movement
of the trunk, suitable faces, in this case, being cast or otherwise formed inside the
trunk chamber to correspond with the ports or perforations in the trunk.
When the valve is used for regenerative stoves, a separate valve must be added
5 for closing the aperture on the stove to keep in the blast when the blast is
turned on and the gas valve disconnected. For this purpose, the additional valve
may be of any of the sluice or sliding type, but preferably a valve with an oscillating
disc or slide as it admits of being opened and closed more expeditiously than the
ordinary sliding type.
Where circumstances render it necessary the disconnecting trunk gas valve may
be arranged to work vertically or at any required angle.
For cleaning or other contingent purposes such as renewing trunk or valve
casing, a sliding plate may be inserted as a shutter in the end box or in any con-
venient place between the trunked valve seat and the gas flue, so as to admit of
such work being performed with as little inconvenience as possible.
Dated this 13th day of April 1892.

page_text: COMPLETE SPECIFICATION.
Improved Gas Valve for Blast Furnace Regenerative Stoves,
applicable also to Gas-fired Boilers.
I, JENKIN LEWIS of 32 Stacey Road Roath Cardiff in the County of Glamorgan,
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 consists in a gas valve of improved construction for use chiefly
in connection with the regenerative stoves of blast furnaces, the said valve being
adapted in its opening and closing to respectively unite and sever the connection
with the opening through which the gas is conducted to the combustion flue, and
the purpose of the improvements is to provide a valve with the said object that
shall combine fewness of parts, and simplicity and cheapness of construction with
easy and expeditious means of being worked.
To attain these advantages the valve is formed with a trunk adapted to be moved
backwards and forwards in the line of its axis within a suitable casing or chamber
so as to displace or respectively replace the one end of the trunk, which forms the
valve proper, with regard to the seat therefor which surrounds the passage way
communicating with an end chamber which under ordinary circumstances is in
direct communication with the main gas supply. The movement of the end of the
trunk which forms the valve is perpendicular to the plane of the valve seat or
valve opening and in the trunk of the valve are ports or openings through which
the gas passes into the interior of the trunk when the valve is parted or opened:
from its seat. The chamber in which the trunked valve has its movement is, for
the rear part about the said ports, made proportionately larger than the trunk and
valve so as to admit of a suitable space all round the trunk and valve to permit
of the passage of the gas from the end box around the valve when the latter is
open and into the ports aforesaid into the trunk whence it issues at the open end
thereof.
The valve with its casing is alligned with an opening in the combustion flue and
the distance is such that when the valve is drawn against its seat to shut off the gas
the trunk which as before stated forms part of the valve is by the same operation
withdrawn from the opening in the combustion flue which the valve has to feed 3
and this severs the connection during the time the valve is closed, whereas the
opening of the valve causes the trunk in its travel forward to unite the valve' with
the opening to be fed, the connection thus remaining while the valve is open and
the gas turned on.
"Although I prefer to employ a valve of the type described which closes by 3
motion perpendicular to the plane of the seat or opening which the valve is intended
to close as such gives a more secure method of closure, a modified form of 'the
valve may be made whereby the trunk may be worked by a backward and forward
movement for disconnecting purposes only, and the gas may be turned on and out
off or regulated by a turning movement of the trunk, suitable faces being cast or 4
otherwise formed inside the trunk chamber to correspond with the ports or
perforations in the trunk.
"When the valvė is used for regenerative stoves, a separate valve must be added
for closing the aperture in the stove to keep in the blast when the blast is turned
on and the gas valve disconnected. The additional valve for this purpose may be 4
of any of the sluice 'or sliding kind but preferably a valve with an oscillating
disk or slide moving on a pivotal centre may be used as its admits of being opened
and closed more expeditiously than the ordinary sliding type.
The disconnecting trunk gas valve is usually placed to work horizontally but
where circumstances render it necessary it may be arranged to work vertically or 50

page_text: For cleaning or other purposes such as a renewal of the trunk or valve casing
a sliding plate may be inserted as a shutter in the end box or in any convenient
place between the trunked valve seat and the gas supply flue. so as to admit of
such work being performed with as little inconvenience as possible.
The accompanying drawings illustrate the improved trunked disconnecting valvo
with the opening to be fed thereby and a pivoted disk valve for the latter,
Fig. 1 being a, longitudinal section and Fig. 2 on the right half a front elevation
and on the left half a cross section on the line 2. 2. Fig. 1.
A is the trunk open at a at one end but formed with the mushroom valve head a
at the other end, a² are the ports therein and a³ the spindle by which the valve is
moved. B is the mouthpiece or guide for the movement of the trunk. C is the
casing with the base chamber e communicating with the end chamber c¹ which
latter is divided from the valve chamber c by a partition with passage way c
surrounded by the valve seat c. The upper half of the casing is removable for
repairs cleaning or other purpose. D is a small roller for supporting the trunk
and relieving the mouthpiece B of friction. E are annular teeth in the spindle a³
with which the toothed wheel or segment e meshes. e is a handle for revolving
the segment e. is the squared end of the spindle a³ for reception of a suitable
key by means of which the trunk may be revolved from time to time, to compensate
for unequal wear or to clean the meeting faces of the valve and seat. F are screw
bolts usually eight in number distributed round the sides and ends of the box to
provide means for any fine adjustments which may be required from time to time
so as to ensure that the trunk A shall work accurately when entering the orifice G.
I are clips, of which there are usually two each side, for securing the cap of the
valve casing. J is the sliding plate by means of which the communication between
the base chamber and end chamber may be cut off when occasion requires.
His the flange on the regenerator stove to which the casing His fixed within
which the pivoted oscillating disk valve K is mounted for closing the orifice G
after the trunk A has been withdrawn.
There will usually be an air admission valve for the combustion flue of the
regenerator stove, but if desired this improved valve may be made with a longer
trunk with air admission ports to also supply air in place of having a separate
air valve; or the spindle a³ may be made hollow and prolonged within the trunk
to, or beyond, the open end thereof to supply air after the manner of an Argand
burner the spindle being made of proportionate size for this purpose. A valve so
modified to supply air also is specially suitable for use for heating gas fired
boilers.
"
The valve may be constructed of cast iron, wrought iron or steel or any portion
thereof from either of these metals, where necessary brass or any suitable non-
corrosive material may be employed for the frictional parts and brick or other
suitable refractory material may be employed for constructing or for lining the
parts which may be subjected to much heat.
Where necessary or preferable by reason of local circumstances the valve may
be arranged to receive the gas from overhead into the end box, instead of
from underneath as shown in the drawing thus rendering the base chamber
unnecessary.
For convenience of construction or any other purpose the trunk or casing may
be made of any number of pieces.
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. A gas valve for blast furnace regenerative stoves or gas fired boilers, in
which a valve with parting faces is prolonged to form a trunk open at the end
remote from the valve and provided with lateral ports the said valve being adapted
to operate as described.
2. An improved gas valve adapted to operate in the manner specified, comprising

page_text: a casing having an end chamber a partition dividing the same from the valve
chamber, a passage through said partition and a seating surrounding said passage,
a valve proper movable perpendicularly to the plane of the valve seating or opening
and prolonged rearward to form a hollow trunk whose axis corresponds with the
*xis of movement of the valve, with lateral ports in the said trunk.
3. An improved gas valve adapted to operate in the manner specified, having a
trunk movable back and forth in the line of its axis, the said trunk being closed at
one end and open at the other and provided with lateral ports adapted by rotation
of the trunk to be brought into or out of coincidence with fixed gas supply ports in
the casing of the valve.
DALL
1
1000
R. HADDAN,
Herbert Haddan & Co.,
18, Buckingham Street, Strand, London, Agent for Applicant.