Improvements in and relating to Valves.
Year: 1897

page_text: Date of Application, 7th Dec., 1897-Accepted, 15th Jan., 1898
COMPLETE SPECIFICATION.
Improvements in and relating to Valves.
I, JEREMIAH O'MEARA, a citizen of the United States of America, of No. 1,
West 21st Street the City and County of New York, in the State of New York,
United States of America, 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:—
Heretofore, in the manufacture of globe, angle and similar valves, it has been
customary to construct a disk with a packed face in such a manner that when the
packing is worn away by use, it is most economical to replace the entire disk. The
disks are packed with material adapted to withstand certain predetermined pres-
sures. Vulcanized rubber, vulcanized asbestos, vulcanized fibre, metallic alloys
and other substances and materials have been used in connection with such disks
in accordance with the service to which the valves are to be applied. It has been
proposed to prolong the life of a disk by providing it with two faces, either of
which may be used by reversal of the disk.
My invention relates to a reversible disk for globe, angle and other like valves,
and means for effecting the ready reversal of the disk. And my invention relates
further to a reversible disk having faces of different quality whereby the disk may
be used for different services or different pressures.
The invention consists in a valve disk chambered upon opposite sides or faces
and provided with suitable packing in such chambers, and supplied with means
whereby either face may be turned into position for use on the valve seat, and the
disk connected with the valve stem, all as I will proceed now more particularly to
set forth and finally claim.
In the accompanying drawings illustrating my invention, in the several figures
of which like parts are similarly designated, Figure 1 is a plan view of one form of
my reversible disk. Fig. 2 is a half section and elevation. Fig. 3 is a cross sec-
tion with the disk packed. Fig. 4 is a sectional elevation of an angle valve with
the disk in vertical section. Fig. 5 is a vertical section of another form of rever-
sible disk. Fig. 6 is a vertical section of still another form of reversible disk.
Fig. 7 shows in perspective means for swiveling the disk and valve stem. Fig. 8
is a vertical section of a globe valve illustrating a modification. Fig. 9 is a
sectional detail view showing detached the modification illustrated in Fig. 8.
Referring now to Figs. 1, 2, 3 and 4, a is a disk having upon opposite faces the
cavities b, b, in this instance annular cavities. These cavities are separated by
the partition c which is provided with a number of perforations d. The packing e
may be applied to the disk in a variety of ways. I prefer to use a vulcanizable
substance, reduce it to a plastic condition, as by heat, and then force it into the
cavities b, b, so that its substance shall pass through the perforations d, as at f,
Figs. 3 and 4, and thereby the substance on opposite sides be tied or combined
together. Thus the packing in one cavity will anchor that in the other.
After the packing has hardened in the disk, the faces of the disk are leveled off
in any usual manner; and as these faces are worn they may be ground down
until the packing is exhausted. By this construction, when one face of the disk

page_text: is worn beyond repair, the disk may be detached from the valve stem, reversed and
again applied to the valve stem in this reversed position, and the fresh face used
until exhausted. Obviously such a disk has practically double the life time of a
single-face disk.
The packing may be applied in a variety of ways, and a variety of packing also
may be used.
As shown in Fig. 5 the packing e may he of rubber or other sub-
stance which may be pressed into the cavity of the disk while in a plastic condition,
and the packing g may be of an entirely different character and may be placed
within the cavity of the disk in a loose manner or by simple manual pressure, or
may be cut as a ring from a body of material, and in any case the said packing
may be held in the cavity by means of a nut which is applied to the stem i of
the coupling or swiveling device k which is used to connect the disk with the
valve stem l. A further modification in the- manner of applying packing either
of the same or of different kind to the opposite cavities of the disk is shown in Fig. 6
wherein the flanges m of the disk are shown as spun down over upon the packing.
By my invention, as already intimated, packing of the same or different. kind
may be used on the two faces of the disk; and by this construction it is possible to
unite in one disk a valve adapted for service with low pressure steam or very
high pressure steam, one face of the disk being packed for low pressure, and the
other for high pressure. Or one face of the disk may be packed with a textile,
fibrous or mineral or vegetable packing or composition, while the other may have a
metallic packing.
In Figs. 4 and 7 the swiveling connection between the valve stem and the disk
is shown as a socket piece k having a screw-threaded stem which engages a
screw-thread in the center of the wall or partition c, and this socket is made with
an undercut slot which receives the inverted T, 1 of the stem ; and inasmuch
as the socket member k is within the circumference of the disk, it is obvious that
there is no chance for lateral disengagement or longitudinal disconnection of the
disk and stem while they are so united, and no necessity for pins and like connee-
tions. As shown in Fig. 6 the stem k¹ may be extended below the partition c
and be provided with a check nut n.
Whenever it is desired to reverse the disk, the said disk is unscrewed from the
coupling member and turned upside-down and again screwed on to the coupling
member.
The globe valve shown in Fig. 8 is of ordinary construction so far as the shell
and external parts are concerned, but the bonnet o has its external screw-threaded
skirt o extended into the body of the shell so as to form a chamber within which
the disk works. The screw-threaded valve stem 7 has its lower end provided with
a circumferential groove 2, and the disk has its bub extended on both faces to
form flanges r, and these flanges are supplied with holes rl, to receive pins or
screws s, the points of which project into the groove of the stem when the stem is
placed within the cavity of the hub, as shown in Fig. 8, so as to connect the disk
and stem. And since the flange r of the hub is always within the skirt of the
bonnet when in use, it follows that the pins or screws cannot become detached,
since they are of such length that their longitudinal play within the chamber".
bounded by the skirt of the bonnet, will not permit them to become detached from
the hub and stem. At the same time, the disk has a swiveling motion on the end
of the stem, and by running the stem so as to project the stem beyond the bonnet-
the bonnet having been detached from the casing-the pins or screws may be
withdrawn and the valve disk reversed.
It is within my invention to use the swiveling connection hereinabove described
in conjunction with a reversible valve made wholly of metal, and it is also within
my invention to use such swiveling connection on a non-reversible valve.
:-
Having now particularly described and ascertained the nature of my invention,
and in what manner the same is to be performed, I declare that what I claim is :-
1. A reversible disk for valves, having cavities or chambers in opposite faces,

page_text: and having material of different quality or character arranged in such cavities or
chambers, one chamber containing, for example, a packing material adapted for
use with low pressure steam, and the other chamber containing packing material
adapted for use with high pressure steam, so that the disk may be used for
either class of service, combined with a stem, and a swiveling connection for the
stem and disk, the parts of which are confined against accidental separation by
adjacent walls of parts of the valve, substantially as described.
2. A reversible disk for valves, composed of a body chambered on opposite sides
and having such chambers packed with a suitable packing material, such chambers
being separated by a partition, a socket piece arranged in said partition, and a valve
stem fitted to such socket piece and held in place in such socket piece within the
disk by the walls of the disk, to swivel the disk upon such stem, substantially as
described.
3. A valve disk, chambered on opposite sides, and provided with packing
material, the chambers being separated horizontally by a partition, a socket piece
secured in such partition and having an undercut slot, combined with the valve
stem terminating in an inverted T, and fitted to such slot, the socket piece and the
end of the valve stem being arranged within the walls of the disk, substantially as
and for the purpose described.
4. A reversible disk for valves, having cavities or chambers in opposite faces, and
having material of different quality or kind arranged in such cavities or chambers,
one chamber containing, for example, a packing material adapted for use with low
pressure steam, and the other chamber containing packing material adapted for high
pressure steam, so that the disk may be used for either class of service, combined
with a stem and a swiveling connection for the stem and disk, the said stem
and swiveling connection being joined within the disk and held together by the
walls of the disk, substantially as and for the purpose described.
5. A reversible valve disk, having sunk within its center a socket piece having
an undercut slot, combined with a valve stem terminating in an inverted T which
is connected with the undercut slot of the socket piece, substantially as and for the
purpose described.
6. A reversible valve disk, a socket piece screwed into the same and sunk within
its top, combined with a valve stem having its end arranged within said socket
piece and held from displacement therefrom by the walls of the disk, the disk
being swiveled thereby upon the stem, substantially as described.
Dated this Seventh day of December 1897.
HARRIS & MILLS,
23, Southampton Buildings, London, W.C., Agents.