Improvements in Metallic Packing for Piston Rod and Valve Spindle Glands of Steam or other Engines.
Year: 1893

page_text: Date of Application, 20th Feb., 1893-Accepted, 22nd Apr., 1893
COMPLETE STETT
Improvements in Metallic Packing for Piston Rod and Valve Spindle
Glands of Steam or other Engines.
1 HENRY DOUGLAS EARL of Deva House, Crewe, in the County of Chester,
Mechanical 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 object of my invention is an improved method of packing the piston rod or
valve spindle rod glands of steam or other engines by means of solid metal rings,
On the piston rod or valve spindle
and I accomplish this in the following manner.
and within the gland box I provide two or more metal rings bored out to closely
fit the piston rod or valve spindle and of such a diameter as to loosely fit the inside
of the gland box so as to allow for movement of the rod, these rings are so formed
with cone shaped edges that when one ring is forced against another the metal of
the one ring which may be turned down to a thin edge for the purpose, and which
I prefer to construct of soft antifriction or other metal, is forced down in close
contact with the piston rod or valve spindle thus forming a practically steam tight
joint between the ring and the rod or spindle, the pressure between the rings being
maintained by a spring or other suitable device.
To enable my invention to be more fully understood I now describe it in detail
with the aid of the accompanying drawings.
Figure 1 Sheet 1 is a sectional view of a gland or stuffing box for a piston rod
A is the gland or stuffing
provided with two of my improved metal packing rings.
box, B. the piston rod, Ċ the gland cover, E is one of my improved metal packing
rings closely encircling the piston rod, the one edge of which abuts against the gland.
or stuffing box cover C, the other edge being turned down to the cone form shown,
F is another
this ring I prefer to form of soft antifriction or other suitable metal.
of my improved packing rings, and this is turned as shown with an internal coned
edge or bell mouth which bears on the coned edge of the ring E. This ring F
I prefer to form in phosphor bronze or other suitable and harder metal. G is a
spiral spring which forces the ring E into close contact with the inner face of the
gland cover C thus forming a practically steam tight joint at the point, at the same
time the spring G forces the hard metal ring F on to the softer metal of the ring E
the comparatively thin edge of the cone giving way to the pressure and closely
encircling the piston rod thus forming a practically steam tight joint.
Figure 2 Sheet 1, is an end elevation of the same the several parts shown being
indicated by the same letters.
Figure 3 Sheet 2, is a sectional view of a similar gland with a modified arrange-
ment of packing rings.
In this case three metal rings, H, J, K, are used, the two outer rings H. K. being
bell mouthed on their inner face and made by preference of harder metal, the centre
ring J being made preferably of softer metal coned externally as shown the
comparatively sharp edges of these cones being compressed or forced on to the surface
of the piston rod by the internal cones or bell mouths of the harder metal rings H
and K the whole being pushed forward. or retained in a state of compression
endways by a spiral spring or other suitable device. But I do not confine myself to
this combination the outer rings may be made of softer metal externally coned on the
two inner faces having between them a harder metal ring with internally coned or
bell mouthed faces into which the externally coned edges of the soft rings are
forced by means of a spring or other suitable device.
Figure 4 Sheet 2, is an end elevation of Figure 3 Sheet
being indicated by the same letters.
the several parts shown

page_text: In cases where the piston rod have enlarged ends of a greater diameter than the
internal diameter of the rings so as to prevent them being passed over the end of
the rod into their places, the rings may be cast on the rods by means of suitable
chills.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is,―
1st. Metallic packing for piston rod or valve spindle glands of steam or other
engines formed of solid metal rings so formed on their adjoining faces that end
pressure forces one or more of the rings in close contact with the rod substantially
as illustrated and described.
2nd. The combination of hard and soft solid metal rings for metallic packing of
piston rod or valve spindle glands of steam or other engines substantially as
illustrated and described.
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Dated this 17th day of February 1893.
HENRY DOUGLAS EARL.