Improvements in or connected with Metallic Packings for Stuffing- boxes and the like.
Year: 1898

page_text: Date of Application, 1st Oct., 1898
Complete Specification Left, 3rd July, 1899-Accepted, 5th Aug., 1899
Improvements in or connected with Metallic Packings for Stuffing-
boxes and the like.
I, JAMES THOMAS JEPSON, of 17, Norwood Terrace, Headingley, Leeds, in the
County of York, Engineer, do hereby declare the nature of this invention to be as
follows:--
This invention has reference to improvements in or connected with metallic pack-
ings for stuffing-boxes and the like in which a ring or neck-bush works against the .
fillet or projection of the end of the stuffing-box nearest the cylinder, and, directly or
indirectly, a spiral spring; the opposite end of which latter presses upon, say, a ring
constituting a part of the metallic packing. I find in practice that both the neck-
bush and spring are very liable to be broken by the neck-bush "knocking" or inoving
to and fro with the strokes of the piston rod, and when such breakages occur the
broken pieces fall or are carried into the cylinder thereby causing great damage by,
say, getting jamined between the piston and the cover of the cylinder.
Now the purpose of this my said invention is to obviate the foregoing objections in
a cheap and effective manner to which end I bore or otherwise form a groove or
recess in the stuffing-box flush or near to the side or face of the neck-bush away from
the fillet of the stuffing-box within which I place a split-ring of any suitable metal
arranged so as to project out of the said groove or recess, thereby holding the neck-
bush firmly in position between the fillet of the stuffing-box and the projecting
portion of the split-ring.
It will be seen that the neck-bush is thus prevented from moving to and fro with
the piston rod and unduely compressing the spiral spring thereby obviating the
breakages and their consequences as already referred to.
3
Improvements in or connected with Metallic Packings for Stuffing-
boxes and the like.
I, JAMES THOMAS JEPSON, of 17, Norwood Terrace, Headingley, Leeds, in the
County of York, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be perforined, to be particularly described and
ascertained in and by the following statement :-
This invention has reference to improvements in or connected with metallic

page_text: packings for stuffing boxes and the like in which a ring or neck-bush abuts against
a shoulder at the bottom of the stuffing-box and is located axially by the elastic
pressure of a spring or the like, usually transmitted through several of the packing
rings. I find in practice that both the neck-bush and spring are very liable to be
broken by the neck-bush "knocking" or moving to-and-fro with the strokes of the
piston rod, and when such breakages occur the broken pieces fall or are carried into
the cylinder thereby causing great damage by, say, getting jammed between the
piston and the cover or end of the cylinder.
The object of this invention is to obviate the foregoing objections in a cheap and
effective manner, to which end I bore or otherwise form a groove or recess in the
side of the stuffing box flush with or near to the face of the neck-bush, within which
groove I place an elastic split ring of any suitable metal arranged so as to project out
of the said groove or recess, thereby holding the neck-bush firmly in position against
the shoulder of the stuffing-box.
I have illustrated the application of my invention to a well-known type of metallic
packing in the accompanying drawings, in which Fig. I is a longitudinal section on
the line A A of Fig. II, and Fig. II is a transverse section on the line B B of Fig. I,
the rod and packing being omitted.
1 is the stuffing box attached to or forming part of the cylinder cover or end, 2 is
the neck ring abutting against the shoulder 3 of the stuffing box, 4 are the various
-parts of the packing, fitting against the rod 5 in the ordinary way, and being sub-
jected to elastic longitudinal pressure by the interposed spring 6, and held in place
by the gland 7.
8 is the groove or recess formed in the side of the stuffing box, and adapted to
receive the ring 9; this ring is made of elastic metal such as steel or gun-metal, its
external diameter being greater than the internal diameter of the stuffing box, and
it is split at one side as shown in Fig. II, so that it can be readily sprung into place
after the neck ring is in position, so securing the latter effectually against longi-
tudinal motion.
The split in the ring is preferably made as shown in Fig. II in order to facilitate
its withdrawal. After removing the gland and packing, a lever or hook can be inserted
behind the projecting tongue 10 and the end of the ring so sprung out of the groove,
and by gradually working round the circumference in the same way, and inserting a
few strips to prevent the ring from springing back into the groove, it can be with-
drawn out of the groove and slid out of the stuffing box.
It is to be understood that the particular form of packing illustrated has only
been selected by way of example, that no claim is made to the details of such packing,
and that my invention is applicable generally to rod packings in which the neck ring
is not otherwise positively held against the shoulder of the stuffing box.
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
The improvement in or connected with metallic packings, which consists in forming
a groove in the stuffing box and inserting therein an elastic metallic ring adapted to
abut against the face of the neck ring and prevent longitudinal movement of the
latter; substantially as described and illustrated.
1000
SLOAN & LLOYD BARNES,
Chartered Patent Agents, 34, Castle Street, Liverpool.
SLOAN & LLOYD BARNES,
Chartered Patent Agents, 34, Castle Street, Liverpool.