Year: 1887

page_text: Date of Application, 1st Feb., 1887.
Complete Left, 21st Apr., 1887.
Complete Accepted, 24th May, 1887
We, THOMAS GRIMSHAW, of Crossness, Belvedere, in the County of Kent, Engineer,
and HARRY SKELTON, of 42 Elizabeth Street, Bradford, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
-
The object of this invention is to provide a packing for stuffing boxes or glands
which shall be more efficient and durable than those hitherto employed.
It consists in constructing such packing in one piece with a circular flange to butt
against the outer end of the stuffing box with a comparatively large area of contact
surface round the opening in such box. From this flange a body extends into the
space inside the stuffing box, such body and flange having a hole through the centre
of a size corresponding exactly (as nearly as possible) with the diameter of the spindle
or rod it is to surround, so as to fit closely round same. The outer surface of the
body tapers to a point from its connection with the flange to its inner end. The
cover plate of the stuffing box is slipped over the spindle or rod and bears against the
flange of the packing, and when tightened up in the usual manner by means of bolts
causes the inner surface of the flange to bear tightly against the outer surface of the
stuffing box and thus ensure a tight joint. The effect of the conical or tapering form
given to the outer surface of the body of the packing which is within the stuffing
Box, is that any pressure in such box will by acting on the conical surface cause the
body to be forced firmly in contact with the rod or spindle, while permitting the easy
movement of the latter through the packing.
In cases where the vessel or part to which the packing is applied is exposed to a
vacuum the flange is provided with a second body similar to the one already described,
and tapering in the opposite direction to a point, in which case the cover plate must.
be shaped so as to bear only on the flange of the packing. In this case when a
vacuum exists within the vessel or part, the pressure of the atmosphere on the outer
body of the packing will cause same to be forced firmly against the rod or spindle,
and so prevent the outer air entering the vessel or part and thus destroying the
vacuum.
Dated this 1st day of February 1887
ALLISON BROS.,
Agents for the Applicants.

page_text: We, THOMAS GRIMSHAW, of Crossness, Belvedere, in the County of Kent, Engineer,
and HARRY SKELTON, of 42 Elizabeth Street, Bradford, in the County of York,
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 this invention is to provide a packing for stuffing boxes or glands
which shall be more efficient and durable than those hitherto employed.
It consists in constructing such packing in one piece with a circular or other
suitably shaped flange to butt against the outer end of the stuffing box with a
comparatively large area of contact surface round the opening in such box. From
this flange a body extends into the space inside the stuffing box, such body and flange
having a hole through the centre of a size corresponding exactly (as nearly as possible)
with the diameter of the spindle or rod it is to surround, so as to fit closely round
same. The body of the packing does not occupy the whole of the space in the
stuffing box, its outer surface preferably tapering to a point from its connection with
the flange to its inner end. The cover plate of the stuffing box is slipped over the
spindle, rod, or stem, and bears against the flange of the packing, and when tightened
up in the usual manner by means of bolts causes the inner surface of the flange to
bear tightly against the outer surface of the stuffing box and thus ensure a tight
joint.
Instead of making the body of the packing conical its outer surface may be made
straight, curved, or of other suitable form, but in all cases it must be of such size and
shape as to leave a space between the inner surface of the stuffing box and the body
of the packing. The effect of leaving such space is that any pressure within the
stuffing box will, by acting on the outer surface of the body of the packing, cause
such body to be forced firmly in contact with the rod, spindle, or stem, while
permitting the easy movement of the latter in or through the packing,
In cases where the vessel or part to which the packing is applied is exposed to a
vacuum, the flange is provided with a second body similar to the one already
described, and preferably tapering in the opposite direction to a point, in which case
the cover plate must be shaped so as to bear only on the flange of the packing. In
this case when a vacuum exists within the vessel or part, the pressure of the
atmosphere on the outer body of the packing will cause same to be forced firinly
against the rod, spindle, or stem, and so prevent the outer air entering the vessel or
part and thus destroying the vacuum.
The packing is preferably made of vulcanized india rubber, but any other suitable
flexible material capable of making a tight joint, while permitting of a body capable
of sliding or rotating (or both) moving therein, may be used for the purpose.
Our invention is illustrated in the accompanying drawing.

page_text: In Fig. 1, the flange A of our improved packing butis against the outer end of the
stuffing box B, against which it is clamped by the cover plate B', and bolts B². The
body A of the packing is shown tapering to a point from its connection with flange A
to its inner or lower end within the stuffing box. C is the rod, spindle, or stem,
passing through the packing.
In Fig. 2, a similar construction is shown as that illustrated in Fig. 1, but the
flange A of the packing is also provided with a second body A similar to body A',
such second body A being for use in cases where the vessel or part to which the
stuffing box or gland is applied, is exposed to a vacuum.
In Figs. 3 and 4, the outer surface of the body A¹ of the packing is somewhat
modified in form, and its inner or lower end is provided with a flange A3, the periphery
of which is in contact with the inner face of the stuffing box B, whereby the inner or
lower end of the body A' will be prevented from being forced away from the rod or
stem C by the pressure of the steam or other fluid acting on such end. In this case
one, two, or more openings or serrations A* (six of which are shown in the drawings)
will have to be made through or in the edge of the flange A³ (as shown in Fig. 4,
which is a plan view of the under side of such flange), in order to enable the steam
or other fluid pressure to pass round and act upon the outer surface of the body A¹ of
the packing.
The sides of the body A' of the packing may be straight or parallel with its
longitudinal axis, in which case the whole of such body would have to be made
sufficiently thin to enable the pressure acting on its outer surface, to ensure an
efficient joint throughout its length, between the inner surface of such body and the
stem or rod C.
It will be seen that the pressure existing in the vessel or part to which the stuffing
box or gland is applied, will by acting on the outer surface of the body A¹ of the
packing, force same against the rod or stem C, with a pressure depending upon the
pressure within such vessel, and the pressure of the body A² on the stem or rod (
whon a vacuum exists in such vessel will in the same way depend upon the extent of
such vacuum, so that an efficient joint will always be ensured between such rod or
stem and the packing under all conditions, while the free movement of the rod or
stem will not be impeded.
Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improved packing of vulcanized rubber, or other suitable flexible material,
consisting in a flange which is clamped against the outer end of the stuffing box or
gland, and from which flange a body having a central hole for the passage of a rod,
stem, or spindle, extends within the stuffing box or gland, leaving a space between
its outer surface and the inner surface of such stuffing box or gland, all substantially
as and for the purpose specified.
2. The improved packing of vulcanized rubber, or other suitable flexible material,
consisting in a flange clamped against the outer end of the stuffing box or gland, a
body extending from such fange into the stuffing box or gland and leaving a space
between its outer surface and the inner surface of the stuffing box or gland, and a
second body extending from the flange outwards, a hole being formed through such
packing for the passage of a rod, stem, or spindle, all substantially as and for the
purposes specified.