Improvements in and relating to Metallio Packings for Piston Rods and like Rods.
Year: 1893

page_text: Date of Application, 12th Jan., 1893
Complete Specification Left, 1st Sept., 1893-Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in and relating to Metallio Packings for Piston Rods
and like Rods.
1, SYDNEY ASLIne Ward of Tudor Place, Sheffield in the County of York,
Engineer, do hereby declare the nature of my invention to be as follows:-
This invention relates to improvements in metallic packings, such as are used in the
glands or stuffing boxes of engine piston rods, and other like rods, and it refers
more particularly to the construction of the stopping pieces, or gluts, used at the
joints of the sections of such metallic packings.
I propose to make the metallic packing itself in a number of segments forming a
circle, and having an incline upon their convex side; these segments or sections
are held together and against the rod by an encircling ring, having an internal
conical part. The top edges of the sections fit against the outer plate of stuffing
box and form a steamtight joint, and they are held in this position by means of a
spring or springs acting between the bottom of stuffing box, and the underside of
the beforementioned ring which encircles the sections.
At the junction of the segmental sections where they fit against the outer plate,
I find it necessary to use stopping pieces, or gluts, in order to ensure a perfectly
steamtight joint.
To attain this result, and also to conduce to a slight increase of frictional wearing
action upon the faces of the said stopping pieces, which by repeated experiments I
find to be of advantage in perfecting the action of the packing, I propose to
construct the stopping pieces of a form (in plan) approximating to a triangle, that
is to say, one side is curved to fit against the piston rod, and the two other sides
converge to a point or thereabouts; the depth or thickness may vary as preferred,
and they are let into corresponding recesses made part in one and part in the other
of two adjacent sections.
Although I prefer the form above described, I may vary it to a semi-circle, and
instead of the sides of the stopping piece being relatively parallel they may converge
downwards, the object being to cause them to be forced inwards towards the rod
when the sections are compressed by the action of the springs upon the coned ring.
I may apply the above improved stopping pieces to the joints of any metallic
packings which require such stops.
Dated the 11th dev of Tenue 1002
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in and relating to Metallic Packings for Piston Rods
and like Rods.
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 :-
This invention relates to improvements in metallic packings such as are used in
the stuffing boxes of engine piston-rods, pump rods, and other like rods, and it
refers more particularly to the construction of the gluts or stopping pieces used at
the joints of the sections or divisions of such metallic packings.

page_text: The accompanying sheet of drawings will clearly illustrate my invention, and
similar letters of reference indicate similar parts in any of the figures.
Fig. 1, is an elevation in section of a stuffing box fitted with a packing made
according to my invention, and also shown in section.
Fig. 2, plan of same with cover plate removed.
Fig. 3, one of the stopping pieces or gluts.
The stuffing box is marked A, the cover plate B, and the piston rod C.
I make the metallic packing, or that part which encircles the rod C; in sections,
the divisions being made longitudinally, the number of sections may be varied
according to the diameter of the rod, or for other reasons, but when put together
they will form a ring of the required diameter.
An incline is formed upon the outside or convex face of each section, preferably
in the form of a shoulder which when the sections are in position forms an annular
downwardly-bevelled shoulder round the packing, but it may take the form of a
projection or wedge-shaped block, or more than one upon each section if desired.
D, is a section, E the inclined shoulder.
These sections D, are held against the rod C, by a solid outside ring F, in which
they are placed, and which is provided with an internal inclined face to correspond
with that of the shoulder upon the sections before described.
The ring is set down or reduced on the outside to form a shoulder G, and in the
face of this shoulder two holes are bored to receive the upper ends of two spiral
springs S, the opposite ends or coils of which rest upon the bottom of the stuffing
box, and their action is to press the ring F, and the sectional packing upwards.
The top edges or faces of the sections fit against the under-face of the cover-
plate B, which is properly prepared or faced to make a steam-tight joint.
At each junction of the before mentioned sections where they fit against the
coverplate, it is necessary in order to prevent the passage of steam, and to keep the
sections equally spaced, to use stopping pieces or gluts, and I construct these in
the form of a triangular wedge or block H, with the inner face concaved to fit
against the piston rod C. The depth of these pieces and the angle of the two flat
sides may be varied, the object being to cause them to be pressed inwards upon the
rod, as the face of the sections is worn away.
The recesses to receive these stopping pieces or blocks, are made of a corre-
sponding shape, half the recess being in one section and half in the adjacent section.
The sides of the stopping pieces may be made to converge downwards, and
although prefer to use two coiled springs in order to equalize their upward
pressure, I do not bind myself to use such number.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is carried into practice, I declare that what
I claim is
A metallic packing as hereinbefore, specified, formed by the combination of a
number of sections D, provided with inclined surfaces E, held together by a
correspondingly inclined solid ring F, supported and pressed upward by springs S,
and provided with wedgeshaped stopping pieces H, substantially as hereinbefore
described and shown.
Dated the 2nd der of & nos 1803
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.