Improvements in Metallic Packings.
Year: 1886

page_text: Date of Application, 30th Nov., 1886.
Complete Left, 31st May, 1887.
Complete Accepted, 1st July, 1887.
PROVISIONAL SPECIFICATION.
Improvements in Metallic Packings.
I, HARRY GORDON SMALL of Poplar House, Wilmslow in the County of Cheshire
Engineer do hereby declare the nature of this invention to be as follows
My invention relates to metallic packings for piston and valve rods, plungers,
pistons, pumpbuckets and such like parts of machinery and my improvements consist
in making or composing such packings of hollow rings or hollow helical coils of
suitable diameter and width to fit easily the stuffing boxes or other parts, these rings
or coils being made of soft metal alloys such as white metal and bearing or resting
one upon another in the middle part of their width, so that the tightening of the
glands or junkrings causes the sides of the rings or coils to bulge out and press against
the rods or cylinders and thereby make them fluidtight. By preference I use rings
or coils having flat surfaces on their inner and outer periphery and convex surfaces on
the upper and underside, but rings or coils of oval or circular or any other section of
such configuration that the rings or coils bear on each other in the middle part of their
width may be used, all having central perforations or being hollow. When the metal
has become worn on the rubbing surfaces, the rings or coils can be further bulged out
by tightening the glands or junkrings, and this operation can be repeated until they
have completely collapsed or are worn through.
Dated this 29th day of November 1886.
EMMOTT & Co.,
Agents for the Applicant.

page_text: Improvements in Metallic Packings.
I, HARRY GORDON SMALL, of Poplar House, Wilmslow, in the County of
Cheshire, 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 relates to metallic packings for piston and valve rods, plungers,
pistons, pump buckets and such like parts of machinery and my improvements consist
in making or composing such packings of hollow rings or hollow helical coils of
suitable diameter and width to fit casily the stuffing boxes or other parts, these rings
or coils being made of soft metal alloys, such as white metal, and bearing or resting
upon each other in the middle part of their width or in such a manner that the
tightening of the glands or junk rings causes the sides of the rings or coils to bulge
out and press against the rods or cylinders and thereby make the packing fluid-
tight.
On the sheet of drawings appended hereunto figure 1 shows a section of a stuffing
box fitted with my improved packing rings, figures 2 and 3 plans of the rings in two
different forms and figure 4 a section of a packing coil.
By preference I use rings having a section as shewn on figure 1, the rings a a
having flat surfaces on their inner and outter periphery and being made of such
diameters that they fit easily to the rod and into the stuffing box c. The upper and
under surfaces of the rings are convex and the rings themselves hollow as shewn.
They may be of the same width all round, as shewn in plan by figure 2, or may have
triangular notches cut out of them in two or more places, as shewn by figure 3, or
may be made in separate segments fitting together. By tightening the gland e upon
the rings a, the sides of the latter are bulged outwards and pressed against the stuffing
box c and rod and the packing is thereby rendered fluid-tight. When the metal
has become worn away on the rubbing surfaces, the rings can be further bulged out
by tightening the gland further, and this operation can be repeated until the rings
have completely collapsed or are worn through.
Instead of separate rings, helical coils may be used, and the section of the rings or
coils may be oval as shewn on figure 3 or circular or of any other form or con-
figuration which will cause their sides to bulge out when the glands or equivalent
parts are tightened upon the top of the rings or coils.
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
Making or composing packings of hollow rings or hollow helical coils or segments
of such rings or coils made of soft metal alloy and of such shape or section that their
sides are bulged out by pressure applied to their tops, substantially as hereinbefore
described and illustrated by the drawings.
Dated 1: L
CM 1007