Improvements in Metallic Packings for Fluid Tight Stuffing Boxes.
Year: 1898

page_text: Date of Application, 29th Nov., 1898
Complete Specification Left, 29th Aug., 1899-Accepted, 7th Oct., 1899
PROVISIONAL SPECIFICATION.
Improvements in Metallic Packings for Fluid Tight Stuffing Boxes.
I, JOHN GEORGE AULSEBROOK KITCHEN, of 44, Albert Road, Alexandra Park,
Manchester, in the County of Lancaster, do hereby declare the nature of this
invention to be as follows:
-
This invention relates to metallic packings for stuffing boxes and the like and
has for its object to provide for more perfect adjustment and fitting especially
in cases where there is great pressure, heat and wear.
In accordance with this invention, I form the interior of the stuffing box
cylindrical and provide a gland and means for securing, the same in the ordinary
way. The packing consists of a number of thin metal conical rings, which are
turned and bored to fit both the interior walls of the stuffing box and the rod
or spindle which passes therethrough at their periphery and central holes res-
pectively. Each ring is slit from its central hole to its periphery. The rings are
passed into the stuffing box and are secured therein and pressed down by the
gland.
When the rings are inserted with their concave face to the bottom of the stuff-
ing box, the gland is formed to press upon their convex face around their central
hole. Pressure thus applied tends to flatten the ring and close their centre par
around the rod or spindle.
When the rings are inserted with their convex face to the bottom of the stuff-
ing box the gland is formed to press upon the outer part of their concave side
which also tends to flatten them and contract their centre part upon the rod or
spindle.
Packing formed as hereinbefore described may also be used for pipe connee-
tions, plungers, rams and the like.

page_text: 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 follow-
ing statement:-
This invention relates to metallic packings for stuffing boxes and the like and
has for its object to provide for more perfect adjustment and fitting especially
in cases where there is great pressure, heat and wear.
In accordance with this invention, I form the interior of the stuffing box
cylindrical and provide a gland and means for securing the same in the ordinary
way. The packing consists of a number of thin metal conical rings, which are
turned and bored to fit both the interior walls of the stuffing box and the rod
or spindle which passes therethrough at their periphery and central holes res-
pectively. Each ring is slit from its central hole to its periphery. The rings are
passed into the stuffing box and are secured therein and pressed down by the
gland.
When the rings are inserted with their concave face to the bottom of the stuff-
ing box, the gland is formed to press upon their convex face around their central
hole. Pressure thus applied tends to flatten the ring and close their centre part
around the rod or spindle.
When the rings are inserted with their convex face to the bottom of the stuff-
ing box the gland is formed to press upon the outer part of their concave side
which also tends to flatten them and contract their centre part upon the rod or
spindle.
Referring to the drawings appended hereunto, Figures 1, 3 and 4, each repre-
sent a stuffing box in sectional elevation, packed in accordance with my improved
system and Figure 2, a plan of one of the packing rings. The packing rings a¹
each consist of a thin metal conical ring which in elevation represents a frustrum
of a cone. Each ring is split through.
The rings lie nested one inside another, care being taken so as not to allow
the slits to come immediately one upon the other.
In fitting the rings, a number of them are first clamped together and bored
centrally to fit the piston rod or its equivalent. They are then placed upon a
mandrel and turned to fit the sides of the gland box; after which they are placed
in position. In Figure 1 the packing a of the thin conical rings is shewn having
its convex face to the bottom or bush of the stuffing box b. In this case, I prefer
to fit or form at the bottom of the box an annular ridge c some distance from
the central hole in the packing, against which ridge the face of the packing bears.
The gland d bears against the packing near to its outer edge, preferably with a
ridge or shoulder at a short distance from the edge. In Figure 3 the packing
is shewn having its concave face downwards. In this case the annular ridge c
is formed upon the ring d near to the inside edge, a spring f being interposed
between this ring and the gland to make the packing self adjusting, and a
similar ridge c¹ on the bush b near to its periphery. In Figure 4 the packing is
divided by a ring e preferably of the sectional form illustrated and each of the
two parts a³, a³, is with respect to the other in reverse order and having its
base or concave face to the ring e. An annular ridge is formed both at the
bottom of the box b and upon the inside face of the gland d. The annular ridges
disposed in the positions indicated in the several views of the drawings permit
the packing when pressed by the gland to more readily flatten and thereby press
tightly both against the rod and the stuffing box wall than when the pressure of
the latter is directly exerted or at the inner and outer edges.
Packings formed as hereinbefore described may also be used for pipe connec-
tions, plungers, rams and the like.
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 improved construction and arrangement of metallic packing and stuffing

page_text: box therefor according to which a suitable number of thin split rings each having
the sectional form of a hollow frustrum of a cone are fitted in the stuffing box
so as to bear against the wall thereof and the piston rod, and the convex face
of the packing is pressed by or against an annular ridge near to its inner edge
and the concave side by or against a similar ridge near to its outer edge by means
of the gland, substantially as herein before described and illustrated with refer-
ence to the several figures of the drawings.
Dated this 28th dox of
1000
R. J. URQUHART, C.E.,
Chartered Patent Agent, Manchester and Liverpool.