Improvements in Metallic Packings.
Year: 1892

page_text: Date of Application, 31st Aug., 1892
Complete Specification Left, 9th Nov., 1892-Accepted, 21st Jan., 1393
PROVISIONAL SPECIFICATION.
Improvements in Metallic Packings.
I, SYDNEY ASLINE WARD of Tudor Place, Sheffield, in the County of York,
Engineer, do hereby declare the nature of this invention to be as follows:-
My invention of improvements in the construction of metallic packings refers
more particularly to those used for piston rods and similar rods, and is an
improvement upon the packing as described in the Specification of. Patent
No. 281880.
.
It consists of a metallic collar divided longitudinally into sections, the inner or
concave faces corresponding with the circumference or periphery of the rod, and
the outer or convex sides having one or more wedge shaped projections, to fit into
a coned hoop hereafter described.
The longitudinal divisions of the collar are so made that the sectional pieces have
all their contiguous edges of an angular form, the sharp or acute edges being next
to the rod when in position.
The top or outer edge of each section is recessed segmentally, to receive a
specially constructed ring which is passed over the rod; this ring is split to permit
of contraction, and provided with a series of reduced parts, recesses, sawgates or
the like in its inner periphery to allow it to readily conform to a reduced diameter
caused by wear.
This flat glut ring closes the ends of the longitudinal divisions,
and its top face fitting against the true surface of a plate outside the gland or
stuffing box, forms a steam tight joint..
To retain the sections in position, and to hold the packing up to the before-
mentioned outside plate, I use a solid hoop having a coned interior, which encircles
the sections, the wedge shaped projections bearing upon the conical interior of the
hoop. In the bottom edge of the hoop, or in a shoulder formed on the outside of
same, and on opposite sides, I make a hole to receive the turned up end of a spiral
spring, two of which are coiled round the lower part of the hoop, or below the
hoop, and bear against the bottom of the stuffing box, the action of the springs
being to force the hoop towards the front plate, and to close the sections by the
action of the inclined surfaces.
There is sufficient room in the stuffing box to allow of lateral play if necessary,
and I prefer to aid this movement, where desirable, by using what is known as a
spherical washer or collar, let into a recess in the front plate. The packing is held
in the stuffing box by the front plate, and usual bolts.
Dated the 30th day of August 180
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Metallic Packings.
I, SYDNEY ASLINE WARD of Tudor Place, Sheffield, 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 :-
My invention of improvements in the construction of metallic packings refers
more particularly to those used for piston rods and similar rods, and is an
improvement upon the packing as described in the Specification of Patent
No. 281880

page_text: The invention is illustrated in the annexed sheet of drawings.
Fig. 1, is a sectional elevation of a stuffing box, with the packing shown partly
in section.
Fig. 2, three views of one of the metallic collar sections.
Fig. 3, facing ring, or glut ring.
It consists of a metallic collar divided longitudinally into sections A, the inner
or concave faces corresponding with the circumference or periphery of the rod;
and the outer or convex sides having one or more wedge shaped projections B, to
fit into a coned hoop C, hereafter described.
The longitudinal divisions D, of the collar are so made that the sectional
pieces A, have all their contiguous edges of an angular form, the sharp or acute
edges A', being next to the rod when in position.
The top or outer edge A, of each section is recessed segmentally, to receive a
specially constructed ring E, which is passed over the rod; this ring is split to
permit of contraction, and provided with a series of reduced parts E', recesses,
sawgates or the like in its inner periphery to allow it to readily conform to a reduced
diameter caused by wear. This flat glut. ring E, closes the top ends of the longi-
tudinal divisions D, and its top face fitting against the true surface of a plate F,
outside the gland or stuffing box G, forms a steam tight joint.
To retain the sections A, in position, and to hold the packing up to the before-
mentioned outside plate F, I use a solid hoop C, having a coned interior, which
encircles the sections A, the wedge shaped projections B, being upon the conical
interior of the hoop. In the bottom edge of the hoop C or in a shoulder C', formed
on the outside of same, and on opposite sides, I make a hole to receive the turned
up end of a spiral spring S, two of which are coiled round the lower part of the
hoop, or below the hoop, as the case may be, and bear against the bottom of the
stuffing box G, the action of the springs being to force the hoop C towards
the front plate F, and to close the sections A, by the co-action of the inclined
surfaces before described.
There should be sufficient room in the stuffing box G, to allow of lateral play
if necessary, and I prefer to aid this movement, where desirable, by using in
conjunction with the packing, what is known as a spherical washer or collar, let
into a recess in the front plate F, and forming the facing for the glut ring to fit
against as indicated by the dotted lines. The packing is held in the stuffing box
by the front plate F, and usual bolts.
I wish it to be understood that I do not claim anything already described in
the Specification and claims of Patent No. 281889.
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 :-
1-A. metallic packing for piston rods and the like consisting of a number of
sections A, forming when put together a divided collar, each section having on
its outer or convex side one or more inclines or wedge-shaped projections B,
fitting into a correspondingly coned hoop C, which is forced forwards by one or
more springs the front end of the divided collar recessed concentrically and
having a split glut ring with internal recesses, fitted in said concentric recess
substantially as hereinbefore described and shown.
2-In a metallic packing for piston rods and the like, a collar divided into
sections having on their convex sides inclined projections corresponding with and
fitting against the internally coned surface of a solid encircling ring substantially
as hereinbefore described and shown.
Dated the 4th ...
1003
ROBT F: DRURY, C.P.A.,.
Bank Buildings, George Street, Sheffield, Agent.for Applicant."