It Improvement in Metallic Packings for Stuffing Boxes.
Year: 1886

page_text: . It
Improvement in Metallic Packings for Stuffing Boxes.,
I, JOHN BURT DEEDS residing at Terre Haute in the County of Vigo, and State
of Indiana, one of the. United States of America, Gentleman, 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:—
15
t
This invention relates to certain improvements in metallic packing for stuffing
boxes, and consists substantially in the same as constructed, and in such other
details as will hereinafter. be, more particularly described and pointed out in the
claims. The invention has reference entirely to the form of construction of the
packing by which thorough uniformity of wear thereof is insured, and a perfectly
tight joint around the rod preserved.
•
Reference being had to the accompanying sheets of drawings.
Figure, 1, represents a longitudinal section of stuffing, box embodying a metallic
packing.constructed in accordance with my invention..
Figure, 2, is a sectional side elevation of the packing ring or sleeve as it appears
when the segments or sections of which it is composed are properly put together..
Figure, 3, represents a view in perspective of each part of the sleeve; said parts.
being arranged relatively to each other.
. .
-
... I
Figure, 4, is au inner side elevation of a large and small section of the metallic
sleeve or packing..
In carrying my invention into effect I provide a ring or sleeve of metal which is
divided longitudinally for its whole length into a corresponding pair of large and.
small segments or sections, each section being formed on its inner surface of, a
contour to conform to the shape of the valve or piston rod, while in cross section,
the smaller sections are wedge-shaped, and the larger ones have their contiguous or
adjacent surfaces formed in such manner as that to fit all, the parts properly,
around the rod, the, narrowest, or tapered edge of the smaller sections, will be
brought outward. In lieu of this latter however, the exact reverse may be the
case; the object sought being that the one pair of sections' will compensate for the
other in the wearing action due to movement of the rod: During the' working of
the rod one set will act to force the other inward, and vice versa, thus accom-i
modating themselves to the vibrations of said rod and maintaining a perfect joint.
Each end of the sleeve; as a whole,, is formed conical or tapering, as shown, and
;
I
J

page_text: surrounding such ends, within the stuffing box, are sets of elastic rings which serve
to preserve the parts of the sleeve together around the rod and are kept sufficiently
tight by proper adjustment of the gland. A space is left between the outer surface
of the sleeve and the interior wall or surface of the box, which space is designed to
be packed or filled with a suitable material, as rubber, hemp or cotton, or the
sleeve may be wrapped with such material. In some instances I may desire to
form adjacent surfaces of the two sets of sections slightly correspondingly convex
and concave in the direction of their lengths, such form however not being
berein shown.
Referring to the several parts by the letters marked thereon
A, represents a stuffing box; B, the rod working therein;; and C, the gland, each
being of the ordinary form. D, represents the metal packing sleeve as a whole;
the same being circular in form and tapered or conical at each end having a central
opening for the passage of the rod, and being divided lengthwise or longitudinally
into a pair of small correspondingly wedge shaped sections, a, and a pair of larger
corresponding sections, b.
The inner surfaces of each section conform to the contour of the rod around
which it placed; and in each section is formed an inner recess or depression, d,
by which when all of the sections are properly put together a continuous
chamber, e, is formed for the reception of a suitable lubricant, as black lead or
plumbago. f, represents sets of elastic rings which surround the conical ends of
the sleeve, and preserve the several sections thereof properly in place. The space
between the sleeve and interior surface of the box is filled with hemp or cotton as
seen at, g, which prevents leakage from between the sections. I am aware that it
is common to provide stuffing boxes with a packing consisting of a solid piece of
wood cylindrical in form and well saturated with oil or similar, lubricant which
wood may have one or both ends conical in shape. This packing not being
expansible will soon wear out and a loose joint is the result. It is also old to have
metallic packing for piston rods composed of a series of rings each made in a
number of sections having inclined meeting faces each alternate section of a ring
having a spring to advance the sections to the rod in their operations to take wear
and maintain a close fitting joint. To the effective working of this packing a
series of rings must be employed, and each ring must be provided with two or
more springs.
The objection to springs in this connection are manifest, and it is desirable to
dispense with their use. Furthermore, it has been a common practice to make a
piston rod packing of some soft metal annular in shape and having a reduced end,
and to combine therewith a correspondingly reduced contracting ring to take up
the wear of the packing. This packing has also an annular depression to form a
water chamber around the rod.
Such packing is liable to become distorted and is soon worn and easily deranged.
By my construction the annular packing is made in sections with inclined meeting
edges, and each end conical, and engaged by a correspondingly shaped compressing
or following ring, thereby producing an expansible sectional ring without the use
of springs. So far as I am aware it is new to make a rod packing annular in forin
in a number of sections having inclined meeting edges, said annulus having a
conical shape at each end, in combination with elastic rings at each end and a
follower to cause the compression of the two ends of the annulus about the rod. It
is also thought to be new to provide an annulus thusly constructed with an
annular depression to form a lubricating chamber about the rod.
. Having now particularly described & ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1st. A metallic packing for valve and piston rods, consisting of a ring or sleeve
divided longitudinally into corresponding pairs of large and small sections, the

page_text: smaller of which being wedge shaped in transverse section and the adjacent sides
of the larger sections conforming thereto, substantially as described.
2nd. A packing for stuffing boxes, consisting of a metal ring or sleeve divided
lengthwise into corresponding pairs of large and small sections, the smaller being
wedge-shaped in transverse section and the larger ones conforming thereto, and
each section having an inner recess or depression by which a continuous lubricating
chamber is formed when all are put together, substantially as described.