Improvements in Metallic Packings.
Year: 1898

page_text: Date of Application, 18th Apr., 1898-Accepted, 20th May, 1898
Improvements in Metallic Packings.
I, THOMAS GREENWOOD, of Myrtle Terrace, Sowerby Bridge, Yorkshire, 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:-
The great feature in my improved metallic packing is the use of a white metal
ring or rings, or a ring or rings made of other suitable material, such rings when
looked at in section being U shaped on the outside and V or cone shaped on the
inside, into which a gunmetal or other suitable metal ring, made with either a single
or double cone, fits, causing the U or V shaped ring or rings to open out, in a similar
manner to that of a hydraulic leather when subjected to the pressure of water.
I construct my improved packing in the following ways:-I have a single ring
made of gunmetal or other suitable metal, with a flange projecting towards the
piston rod at the bottom of the stuffing box, or there may be two gunmetal or other
rings, with a given space between them, in which case the top ring has a flange at
its top end and the bottom ring has a flange at its bottom end, both flanges project-
ing towards the piston rod. When I make use of two rings I place them inside the
stuffing box, the rings being made smaller in diameter than the inside of the stuffing
box in the case of a floating ring, or to fit the bore of the stuffing box if a non-
floating is required. The gland of the stuffing box I have made to screw down to the
flange of the top ring with or without springs.
Inside the flanged gunmetal or other metal ring at the top, I have a white metal
ring (or this ring may be made of any other suitable material) made to fit the rod,
such ring when looked at in section, being U shaped on the outside, and V or cone
shaped on the inside, and inside the gunmetal or other metal ring at the bottom I
have a similar U or V shaped white metal ring, or ring made of any other suitable
material, the two white metal or other U or V shaped rings being placed in opposite
directions to each other.
Fitting inside the V's of the white metal or other rings, I have a double coned gun-
metal, or other metal, ring, having a groove round the centre both inside and outside,
one cone of the ring fitting inside the top V or U shaped ring, whilst the other cone
fits inside the bottom V or U shaped ring, so that when the gland is screwed down,
the double coned ring is forced inside the two U or V shaped rings, pressing them out
towards the rod.
In the case of the gunmetal or other metal ring with flange at the bottom of the
stuffing box, the gland would screw down on the top of the V or U shaped ring,
opening it out over the centre double coned metal ring, and causing the bottom
U or V shaped ring also to open out tight against the rod, the action being similar to
that of a hydraulic leather.
Or, I can make my improved packing without the metal flanged rings, by having
the double coned metal ring with a bore to fit the piston or other rod, with a white
metal, or other material, V or U shaped ring at the bottom, and one placed the
reverse way on the top. By this method also the rings can be made floating or non-
floating. In the case of non-floating the U or V shaped rings would fit inside the

page_text: stuffing box, so that when the gland is screwed down on the top of the U or V shaped
ring it would cause this ring to open out towards the piston rod, at the same time
forcing the gunmetal or other metal double coned ring into the bottom U or V shaped
ring and causing it also to open out against the piston or other rod.
If a floating
ring is required it must be made smaller than the inside of the stuffing box, and the
centre metal double coned ring made to correspond.
Or, I can place the U or V shaped rings in the stuffing box with the apex of the V's
coming together, and the bottom of the stuffing box having a gunmetal or other
coned ring projecting upwards into the lower V or U shaped ring, and the top having
another cone shaped ring fitting into the top U or V shaped ring, so that when the
gland is screwed down on the gunmetal or other coned ring, it forces out the top U or
shaped ring against the rod, and at the same time forces down the other V or U
shaped ring over the gunmetal or other metal cone at the bottom of the gland, and
opens it out against the rod also.
Or, instead of using two U or V shaped rings, I can use one only, with a cone
shaped ring at the bottom of the stuffing box, the gland screwing down on to the top
of the U or V shaped ring of white metal or other material, or the cone shaped ring
may be on the top with the U or V shaped ring underneath.
If found desirable, I can make the gland that screws down on my improved packing,
with a second stuffing box, having a gland on the top for screwing in soft packing, to
prevent any leakage of water or steam that may pass the U or V shaped rings.
In the drawings annexed hereto, in Fig. 1, I show a section of my improved packing
with two metal flanged rings, A being the stuffing box and B B the two flanged
rings with a space C between them. D is the gunmetal, or other metal double
coned ring with the cones as at K K with grooves at E E, the U or V shaped rings
being shown at F F fitting over the double coned metal ring D which distends
the packing. G is a gland which screws down on the top of the metal flanged
ring B.
In Fig. 2 the same construction is shown except that there is only one gunmetal
flanged ring B and the gland G tightens on to the top of the U or V shaped
ring F.
Fig. 3 shows the two U or V shaped rings F F turned in opposite directions with
the bottoms of the V's pointing towards each other, the bottom of the stuffing box A
having a coned ring H projecting upwards, and the top having a coned ring I
projecting downwards. On the top of the top ring I is the gland G for forcing the
coned ring I into the U or V shaped ring F and pressing the bottom U or V shaped
ring F over the bottom coned ring H thus tightening the packing against the
rod J.
Fig. 4 shows a section through the stuffing box A with a double coned ring D
with U or V shaped rings F F but without the flanged rings B B Fig. 1 and B
Fig. 2.
In this case the gland G would tighten directly on the top of the ring F.
Fig. 5 shows the stuffing box A with a single U or V shaped ring F with one coned
metal ring H the cone pointing upwards and the gland G pressing on to the top
of the U or V shaped ring F tightening same against the rod J.
Fig. 6 shows a similar construction except that the gland G is made to form a
second stuffing box for the use of soft packing, L, with a second gland M.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:
1. The method of packing glands for piston rods, valve spindles, pump plungers,
and the like, substantially as described and shown in drawings.
2. In a metallic packing the use of rings made of white metal, or other suitable
material, such rings being U shaped on the outside and V or cone shaped on the
inside, closely resembling hydraulic leathers, substantially as described and shown
in drawings.

page_text: 3. In a metallic packing the use of double or single cone shaped rings, such rings
fitting into U or V shaped rings and causing the latter to open out when pressure
is put upon them substantially as described and shown in drawings.
4. In a metallic packing the use of rings made with flanges so as to form a case
or box for holding the single or double coned rings and the U or V shaped rings
already referred to, substantially as described and shown in drawings.
Dated this 18th day of April 1898.
THOMAS
GREENWOOD,
Myrtle Terrace, Sowerby Bridge.