AN IMPROVED METALLIC PACKING FOR PISTON-ROD AND OTHER STUFFING BOXES
Year: 1884

page_text: I STANHOPE PERKINS, of 6, Healey Terrace, Fairfield, near Manchester in the
County of Lancaster, Engineer do hereby declare the nature of my said Invention
for AN IMPROVED METALLIC PACKING FOR PISTON-ROD AND OTHER STUFFING
BOXES to be as follows:-
My Invention relates to an improved metallic packing for piston-rod and other
stufling boxes and consists of a series of metal rings of the following formation.
a cylindrical ring of soft metal, such as "White" or Patent metal, made in one
piece, or in sections and of internal diameter to suit the rod to be packed and of
external diameter to fit the stulling box, has formed on its edge, or edges a
V groove and there is provided a ring of hard metal made of a wedge section and
in one piece, or in sections and of diameter corresponding to the cylindrical ring
before mentioned. This wedge shaped ring takes into the V groove on the edge of
the soft metal cylindrical ring before spoken of, and its function is to compress the
inuer surface of the cylindrical ring against the rod to be packed and expand the
outer surface of the cylindrical ring against the edge of the stuffing box. The
packing is composed of a series of these cylindrical and wedge shaped rings. Each
of the series are separated by a split tubular ring of soft metal such as "White," or
Patent metal made in one piece, or in sections and of size to fit the rod and the
stuffing box.
In packing a stuffing box, the rings are placed in the following order, I first
insert a cylindrical ring with a V groove on its upper edge (the groove nearly
dividing the ring) into the stuffing box. I then insert a hard metal wedge
sectioned ring, so that its tapered edge enters the groove of the cylindrical ring.
I then insert a tubular split soft metal ring and then another cylindrical grooved
ring with its groove on the upper edge. I then insert another hard metal wedge
sectioned ring which takes into the groove of the cylindrical ring. I then insert
the gland, or in the case of long sinfling boxes, I increase the number of the rings
in the order above stated before inserting the gland. On screwing the gland up
the hard metal wedge shaped rings expand the soft metal cylindrical rings against
the edge of the stuffing box and force the rings against the rod to be packed. The
interstices between the rings form lubricant spaces.
....

page_text: In cases where cylindrical rings are used with V grooves on both edges a hard
metal wedge sectioned ring is provided for each groove and the soft metal tubular
rings are placed between the flat edges of the wedge sectioned rings.
My Invention provides a metallic packing, which admits of being kept against
the rud being packed and the stuffing box, as it wears away, by screwing up the 5
gland.
I STANHOPE PERKINS of 6 Healey Terrace, Fairfield, near Manchester, in the
County of Lanenster, Engineer do hereby declare the nature of the said Invention
for AN IMPROVED METALLIC PACKING FOR PISTON-ROD AND OTHER STUFFING
BOXES 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 an improved metallic packing for piston-rod and other
stuffing boxes, and consists of a series of metal rings of the following formation.
A cylindrical ring of soft metal such as "white" or Patent metal made in one
piece, or in sections and of internal diameter to suit the rod to be packed and of
external diameter to fit the stuffing box, has formed on its edge, or edges a
V groove and there is provided a ring of hard metal made of a wedge section and
in one piece, or in sections and of diameter corresponding, or nearly corresponding
to the cylindrical ring before mentioned. This wedge shaped ring takes into the
V groove on the edge of the soft metal cylindrical ring before spoken of and its
function is to press the inner surface of the cylindrical ring against the rod to be
packed and expand the outer surface of the cylindrical ring against the edge of the
stuffing box. The packing is composed of a series of these cylindrical and wedge
shaped rings. Each series are separated by a split tubular ring of soft metal such
as "white
or Patent metal made in one piece, or in sections and of size to fit the
rod and the stuffing box.
In packing a stuffing box, the rings are placed in the following order. I first
insert a cylindrical ring with a V groove on its upper edge (the groove nearly, or
quite dividing the ring) into the stuffing box. I then insert a hard metal wedge
sectioned ring, so that its tapered edge enters the groove of the cylindrical ring.
I then insert a tubular split soft metal ring and then another cylindrical grooved
ring with its groove on the upper edge. I then insert another hard metal wedge
sectioned ring, which takes into the groove of the cylindrical ring. I then insert
the gland, or in the case of long stuffing boxes, I increase the number of the rings
in the order above stated before inserting the gland. On screwing the gland up,
the hard metal wedge shaped rings expand the soft metal cylindrical rings against
the edge of the stuffing box and force the rings against the rod to be packed. The
interstices between the rings form lubricant spaces.

page_text: In some cases the cylindrical rings are used with V grooves on both edges and
a hard metal wedgo sectioned ring is provided for each groove and the soft inctul:
tubular rings are placed between the flat edges of the wedge sectioned rings.
The beforegoing being the nature of my Invention, I will now proceed to
describe more in detail how the same may be carried out into practical use.
reference being had to the sheet of Drawings making a part of this Specification
and to the letters and figures of referenco marked thereon, like letters and figures.
being used to denote the same, or corresponding parts throughout the various.
VICWS.
Views.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a sectional elevation of a stufling box provided with a metallic packing
constructed according to my Invention.
Figure 2 is an elevation showing the stuffing box in section and showing the
packing in section.
Figure 3 is a section through X X Figure 1.
Figure 4 is a section through Z Z Figure 1.
Figure 5 is a detail shown partly in section of the packing rings, according to my
Invention, separated.
Figure 6 is a plan of the V grooved ring.
Figure 7 is a plan of the wedge shaped, or tapered ring.
Figure 8 is a sectional clevation of a modified arrangement of the rings shown at
Figure 5.
The packing consists of a series of metal rings of the following formation and
nature, reference being had to Figure 5. A is a cylindrical ring of soft metal, such
as white, or patent metal, made in one piece, or divided at a and in one cylindrical
piece, or divided into segments, which when together form the entire ring. The
ring A is of internal diameter to suit the rod to be packed and of external
diameter to fit the stuffing box, and has formed on its edge and in it a V groove a¹
which groove, in the case of divided rings, as shown in the Drawings is formed by
bevelling the edges of the respective parts of the ring, as shown. B is a ring of
hard metal, such as brass, or gun metal made of a wedge section and in one piece,
or in segmental sections and of diameter to suit and enter the V groove a¹ of the
soft metal ring A. The function of the ring B is to press the inner surface of the
ring A against the rod to be packed and the outer surface of the ring A against
the edge of the stuffing box. C is a split tubular ring of soft metal such as white,
or patent metal made in one piece, or in segmental sections, and of diameter to suit
the rod and stuffing box to be packed. The packing is composed of a series of the
rings A and B each series being separated by a ring C and placed in the stuffing
box D in manner such as shown at Figures 1 and 2, namely in packing the stuffing
box D the rings are placed in the following order. I first insert in the stuffing
box D and round the rod E a white metal ring A with the V groove a¹ on its
upper edge. I then insert a hard metal wedge sectioned ring B so that its tapered
edge enters the V groove a¹ of the ring A. I then insert a tubular split soft metal
ring C and over the ring CI place another ring A and over this another ring B.
I then insert the gland F, or in the case of long stufting boxes 1 repeat the rings in
the order C A B above stated before inserting the gland F. On screwing up the
gland F, the hard metal wedge shaped rings B expand the soft metal rings A
against the edge of the stuffing box D and also force the inner part of the rings A
against the rod E thus packing the rod. The interstices between the rings form
spaces for lubricant. To facilitate the removal of the packing, the rings B are
provided with notches 6 for the insertion of a key or spanner.
Figure 8 shows a modification of the ring A, namely the V groove a' is formed
on both edges of the ring A and in this case a hard metal ring B is used on both
sides of the ring A and tubular rings C are placed between the flat edges of the
rings B as shown.

page_text: •
My Invention provides a metallic packing, which permits of being kept against
the rod to be packed and the stuffing box, as it wears away by screwing up the
gland.
A packing according to my Invention is applicable for packing piston rods and
other rods and stuffing boxes requiring such packing.
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:-
"
First In stuffing boxes of the type herein specified, the combination of wedge
shaped rings, or pieces (such as B) and bearing rings, or pieces (such as A) forming
grooves (such as a¹) operating in the manner herein described and constructed
substantially as set forth.
Second In stuffing boxes of the type herein specified the combination of wedge
shaped rings, or pieces (such as B) bearing rings, or pieces (such as A) and rings, or
pieces (such as C) operating in the manner herein described and constructed sub-
stantially as set forth.
Third The combination of the rings B B bearing rings A A A A and divided
hollow ring C as set forth and constructed substantially as described with reference
to Figures 1. 2. 3. 4. 5. 6 and 7 of the Drawings.
Fourth The combination of the rings B B B B bearing rings A A A A and
divided ring C as set forth and constructed substantially, as described with
reference to Figure 8 of the Drawings.