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

page_text: Date of Application, 14th Jan., 1898
Complete Specification Left, 14th Oct., 1898--Accepted, 10th Dec., 1898
Improvements in or connected with Metallic Packings for
Stuffing-boxes and the like.
1, DANIEL MCNAMEE, of 16, Haddon Place, Kirkstall Road, Leeds, in the
County of York, Engine Fitter, do hereby declare the nature of this invention
to be as follows;
-
According to this my said invention of improvements in or connected with
metallic packings for stuffing-boxes and the like, I use a neck-bush, to work
against the fillet of the stuffing-box, of say gun-metal or brass either made
whole or in halves or segments, suitably connected together, and having the hole
through which the rod passes of a larger diameter than the rod itself so that the
neck-bush shall not work against or hear upon the rod. I bore cut or otherwise
form a groove or recess in the neck-bush within which groove or recess I fit
a ring of soft metal such as white or other anti-friction metal. This inner ring
works against and bears upon the rod and may be split or made in halves or
segments. A spring is suitably placed or fitted around its outer periphery so as
to keep the ring or its respective halves or segments in position upon the rod.
The groove or recess in the,neck-bush is made deeper than the inner ring so as to
allow the latter to move in a direction admitting of deviations of the rod from its
normal path or travel.
!
I likewise suitably place one or more such rings in the gland or cover of the
stuffing-box. In one instance I form a groove or recess in the shoulder portion
of the gland or cover and fit within this groove or recess.say two inner moveable
anti-friction metal rings to work against and bear upon the rod separated from
each other by a comparatively thin ring of say gun-metal or brass. Similar thin
hard-metal rings may be placed at each or either end of the groove or recess
in the gland or cover such hard-metal rings thereby acting as guides or bearing
surfaces for the sides of the inner moveable rings.
In a modification I place say two inner moveable rings within the neck-bush
such rings being either in one and the same groove or recess as already described
with reference to the inner moveable rings within the gland or in separate grooves
or recesses.
In case steam and or water passes the ring or rings within the neck-bush and
thus finds its way into the stuffing-box the pressure of the steam woull be so
considerably reduced as to render its action in the stuffing-box harmless and also
prevent its escape beyond the ring or rings within the gland. The water would
escape by way of the drain-cock, as is well known.
"
Packings thus fitted with inner moveable rings, as hereinbefore described, do
not require the aid of "soft" or fibrous" (that is to say other than metallic.
substances) material to secure steam and water tightness, and metallic packings

page_text: may also be made absolutely steam and water tight at the gland by the use of the
mner moveable rings constituting the subject-matter of this my said invention.
101
1
P T
1000
Improvements in or connected with Metallic Packings for
Stuffing-boxes and the like.
I, DANIEL MCNAMEE, of 39, Haddon Place, Leeds, in the County of York,
Engine Fitter, 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 relates to metallic packings for stuffing boxes and the like, and
the object is to improve such packings by fitting the neck bush, or the gland,
or both, with rings adapted to increase the fluid tightness of the packing and yet
admit of limited transverse movement of the rod.
.
I have illustrated my invention in the accompanying drawings, in which Fig. 1
is an elevation, in longitudinal medial section, of a stuffing box and packing,
and Fig. II is a fragmentary detail view.
R is the rod to be packed, 1 the stuffing box, 2 the gland, and 3 the neck bush.
The packing consists of a number of rings 4 held in sleeves 5 and 6 which are
respectively pressed against seatings formed on the rings 7 and 8, by means of
a series of interposed springs 9 held in rings 10 as shown in Fig. II., the pressure
being transmitted through the packing rings.
The neck bush has a circumferential groove formed in its inner surface in
which I fit a ring 11; in the arrangement illustrated the neck ring is divided
transversely into two parts 3 and 7, between which parts the groove is formed;
the ring 11 is made of white metal or other soft anti-friction metal, and is split,
or divided into segments, and provided with an encircling spiral spring 12 located
in a peripheral groove, which spring is adapted to bring the inner surface of the
ring to bear upon the rod with elastic pressure. The bore of the neck bush is
sufficiently greater than the diameter of the rod R to permit the necessary
transverse movement of the rod; and for the same reason clearance is provided
between the spring 12 and the circumferential wall of the groove.
Two rings similar to 11 are fitted in a groove in the gland formed by recessing
the gland and fitting an end piece, such as 13, secured to the gland by bolts as
shown. The rings may abut laterally as shown, or they may be separated by
thin rings of brass or gun-metal (not shown in the drawings), and such rings may
also be fitted between the rings 11 and the plane walls of the groove.
When two rings are fitted they may be placed in separate grooves instead of
both in the one groove as shown, and instead of their being but one ring in the
neck bush as shown, there may, of course, be two as described in connection with
the gland.
The diameter of the bore of the gland and the depth of the groove in the gland,
are, as in the case of the neck bush, sufficient to permit the necessary transverse
movement of the rod.
The two parts of the neck bush are kept in proper relative position axially,
and the neck bush is held down on its seating. by a cylindrical linas 11

page_text: The elastic pressure on the rings 11 causes them to bear closely on the rod so
that they make a very effective fluid-tight joint, and as they are fitted in the
gland as well as in the neck ring any steam which may pass the latter will,
on entering the stuffing box, be so reduced in pressure as to be arrested by the
rings in the gland.
In cases where rings such as 11 are fitted to metallic packings the soft fibrous
packing which is sometimes added in the ordinary construction may be dispensed
with.
It is to be understood that the well known form of packing selected to illustrate
the application of my invention is intended to be merely typical of such packings
generally, and to the details of the packing of such I, of course, make no claim,
but:-
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:
1. The improvement in metallic packings of the class herein referred to,
which consists in fitting rings such as 11, either singly or in pairs, in grooves in
the neck bush and gland of the packing; substantially as and for the purpose
described and illustrated.
2. The improvement in metallic packings of the kind herein described, which
consists in dividing the neck bush into two parts so as to form a groove and in
fitting therein a ring, or pair of rings, such as 11; substantially as described and
illustrated.
3. The improvement in metallic packings substantially as described and illus-
trated in the drawings.
1000
SLOAN & LLOYD BARNES,
34, Castle Street, Liverpool, Agents for the Applicant.