Improved Packing suitable for Stuffing Boxes and the like.
Year: 1896

page_text: Date of Application, 7th Nov., 1896
Date of Application, 7th Nov., 1896
'
Complete Specification Lett 9th Aud 1907 Accented
Ando
1007
PROVISIONAL SPECIFICATION.
Improved Packing suitable for Stuffing Boxes and the like.
I, JAMES AIREY, of No. 17 Bellerby Terrace, West Hartlepool, in the County of
Durham, Superintendent Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention relates to improved means for preventing the escape of fluid
between pump-plungers, piston-rods, valve-spindles and the like (all hereinafter
included in the word "rod") and the walls or surfaces (hereinafter referred to as
the stuffing box) in relation to which they are intended to work in a fluid tight
manner.
In a stuffing box I provide a sleeve of suitable material such as brass having an
internal flange that surrounds the rod and within the sleeve I arrange divided
rings (which may be for examples of gun metal or wood) adapted to bear at their
inner circumferences or edges against the rod and behind these between them and
the sleeve suitable springs; and between two such rings and their respective
springs I place what I call a hollow ring which is a ring made in parts (halves)
with a deep annular recess in it that is or may be of a form gradually increasing
in width towards the inner periphery of the ring which is in cross section approxi-
mately U shaped and in external form a short cylinder. The springs are or may
be coiled springs of suitable non-corrosive metal such as manganese bronze and of
approximately oval or oblong form in cross section so as to be adapted to press
the ring segments against the rod and also to act in a direction parallel or
approximately so to the axis of the rod, the better to adapt them for which purpose
I sometimes make them of a form as seen in a cross section thereof bent inwardly at
the inner sides or outer sides, or both. The first mentioned rings are made each
recessed at one end thereof to receive other ring segments having fillets or flanges
that take into grooves in the shoulders of the main rings; the said segments are
arranged to break joint with those of the main rings.
At the respective ends of the sleeve containing the above described rings and
springs I provide a couple of flat rings or washers that may be of brass, one of
these in each pair fitting at its inner circumference or edge around the rod and
being of less external diameter than the stuffing box and the other of the pair
fitting at its outer circumference the wall of the stuffing box but having the hole
through it sensibly larger in diameter than the rod. Behind each pair of said
washers is a flanged sleeve or lining.
Another construction comprises an outer continuous ring of suitable material
(it may be brass or gun metal) an inner ring of suitable flexible metal (such as
gun-metal) cut through at one or more places, each of these rings being provided
with a transverse end or flange portion and a coiled spring of the kind above
referred to.
Within the inner ring there are preferably arranged a number of segments or
packing pieces of suitable material which fit in recesses in the said ring and have
preferably projections or recesses so as to be interlocked therewith when the

page_text: packing is in position in a stuffing box or the like, and which are so arranged as to
overlap the cut or cuts formed through the inner ring, a pin being, it may be,
passed through one of the segments and into the inner ring to keep them in
relative position.
proper
Packing devices as described may be arranged end to end to any number in a
stuffing box or the like, and there may, as is especially advantageous in the case
of an old piston-rod or the like, be employed in conjunction therewith a ring of
soft non-metallic packing, which may be inserted at the inner end of the stuffing
box or the like and between two rings of gun-metal or other suitable material of
which one may be of L section and fit into the bottom of the stuffing box or the
like and the other be of rectangular section and be in contact with one of the inner
or outer rings hereinbefore described.
1000
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
Improved Packing suitable for Stuffing Boxes and the like.
I, JAMES AIREY, of No. 17 Bellerby Terrace, West Hartlepool, in the County of
Durham, Superintendent Engineer, do hereby declare the nature of this invention
and in what maner the same is to be performed to be particularly described and
ascertained in and by the following statement:-
This invention relates to improved means for preventing the escape of fluid
between pump-plungers, piston-rods, valve-spindles and the like (all hereinafter
included in the word "rod") and the walls or surfaces (hereinafter referred to as
the stuffing box) in relation to which they are intended to work in a fluid tight
manner, as I shall now proceed to describe with reference to the accompanying
drawings wherein Fig. 1 shows partly in vertical section and partly in elevation a
stuffing box with one construction of my improved packing applied thereto. Fig. 2
is a cross section of the packing on the line az of Fig. 1.
In a stuffing box I, there is provided a sleeve 2 of suitable material, such as
brass, having an internal flange 2 that surrounds the rod 3 to be packed, and
within the sleeve are arranged divided rings 4, 4* (which may be for examples of
gun metal, wood such as lignum vitæ, or any soft metal, i.e. white metal, or
material), adapted to bear at their inner circumferences against the said rod.
Behind these rings, between them and the sleeve 2, are suitable springs 5, 5, and
between two such rings and their respective springs is placed what I call a hollow
ring 6 which is a ring made in parts (halves )with a deep annular recess 6* in it
that is or may be of a form gradually increasing in width towards the inner
periphery of the ring which is in cross section approximately U shaped as shown
and in external form a short cylinder. The annular recess 6 in this ring serves
as a reducing chamber to lessen the pressure of any steam which may enter it,
after passing the first ring 4, such steam expanding and becoming reduced in
pressure in the chamber and thereby prevented from readily escaping along the
piston rod between it and the next ring 4. The parts of the divided rings 4 4 are
preferably each formed along their longitudinal free edges with outwardly extend-
ing longitudinal flanges 4" between which the springs 5 are placed as shown in
Fig. 2. These springs are or may advantageously be coiled springs of suitable
non-corrosive metal such as manganese bronze or phosphor bronze and of approxi-
mately oval or oblong form in cross section so as to be adapted to press the ring

page_text: segments against the rod and also to act in a direction parallel or approximately
so to the axis of the rod 3, the better to adapt them for which purpose I sometimes
make them of a form, as seen in a cross section thereof, bent inwardly at the inner
sides or, as shown, at the outer sides, or, it may be, at both sides. The metal of
which the springs are made, may be of flat or round section.
The rings 4 4 are, in this example, made each recessed at one end thereof to
receive other ring segments having fillets or flanges 7 that take into corresponding
grooves or recesses in the shoulders of the main rings, the said segments 7 7"
being arranged to break joint with those of the main rings 4 4* and so prevent
the ready pasage of steam or other fluid through such joints.
At the respective ends of the sleeve 2 are provided a couple of flat rings or
washers 8, 8" that may be of brass, one of these in each pair, viz. 8, fitting at its
inner circumference or edge around the rod 3 and being of less external diameter
than the stuffing box 1, and the other viz. S*, of the pair fitting at its outer circum-
ference the wall of the stuffing box 1 but having the hole through it sensibly larger
in diameter than the rod Behind each pair of said washers 8, 8ª is a flanged
sleeve, lining, or bush 9.
The sleeve 2 may be made in halves so that it can be placed around a piston or
other rod without its being necessary for this purpose to take off the cross head or
other enlarged part secured thereto. The parts of the sleeve may be adapted to be
rigidly connected together as by screws, after it has been placed around the rod.
Or if the divided sleeve be made of a size to fit the interior of the stuffing box, the
parts thereof need not be fixed together. The rings or washers 8, 8* may also, for
a like reason, be each made in halves, the parts of the two rings of each pair of
rings being, after placing them around the rod, secured together by screws.
Fig. 3 is a half horizontal section corresponding to Fig. 2, and Figs. 4 and 5
perspective views of parts of a packing ring 4, showing a modified construction of
my improved packing in which the segments 7 for closing the longitudinal joints
between the parts of the rings 4 4* are each made short and in one piece with a
part of the ring and arranged to fit a corresponding recess 7* in the adjacent part
of the ring. In other respects the arrangement is similar to that shown in
Figs. 1 and 2.
Fig. 6 shows partly in vertical section and partly in elevation, and Fig. 7 in
horizontal section on the line of Fig. 6, a further modified construction of
my improved packing. It comprises an outer continuous ring or sleeve 2 of
suitable material (it may be brass or gun metal) provided with an inwardly
extending transverse end or flange portion 2" an inner ring 4 of suitable flexible
metal (such as gun-metal white metal or wood) cut through at one or more places,
and provided with a transverse end or flange portion 4b and a coiled spring 5 of
the kind above referred to interposed between the two rings 2 and 4. The trans-
verse end or flange portions 2, 4b in the example shown are each arranged to
extend over the adjacent ring. In this arrangement of the packing, the internally
grooved ring 6 of the arrangement shown in Figs. 1 and 2 is omitted.
Within the inner ring 4 there are preferably arranged, (as in Figs. 1 and 2) a
number of segments or packing pieces 7 of suitable material for example gun-
metal, which fit in recesses in the said ring and have, preferably, projections 7*
(or recesses) so as to be interlocked with the ring 4 when the packing is in position
in a stuffing box 1 or the like, and which are, as before, so arranged as to overlap
the cut or cuts formed through the inner ring 4. A pin 10 (Fig. 7) may be passed
through one of the segments 7 and into the inner ring 4 to keep them in proper
relative position.
Packing devices as herein before described may be arranged end to end to any
number in a stuffing box or the like in which they will be subjected to endway's
pressure when the gland or equivalent is tightened up. In Figs. 1 and 2 there
is only one complete packing device in the stuffing box. In Figs. G and there
are two arranged end to end. There may, as is especially advantageous in the case
of an old piston-rod or the like, be employed in conjunction with such packing

page_text: devices a ring 11 (Fig. 6) of soft non-metallic packing, which may be inserted at
the inner end of the stuffing box or the like and between two rings 8 and 9 of
gun-metal or other suitable material of which one may be the flanged sleeve or
bush 9 of section and fit into the bottom of the stuffing box or the like, and the
other 8 be of rectangular section and be in contact with one of the inner or outer
rings 4 or 2 respectively.
Having now particularly described and ascertained the nature of the said inven-
tion and, in what manner the same is to be performed I declare that what I
claim is:
1. In packing, the combination with main divided packing rings arranged. to be
pressed by springs against the rod or body to be packed, of a ring arranged between
the adjacent ends of the said packing ring and made with a deep annular recess in
the side thereof that will be next the said rod or body when the packing is in use,
substantially as herein described.
2. A packing device comprising a sleeve adapted to be inserted into a stuffing
box or the like and formed with an internal flange to surround the rod to be
packed, divided rings arranged within the sleeve and adapted to surround and bear
against the rod, springs arranged between the divided rings and sleeve, and a
hollow ring arranged between two such divided rings and their respective springs
and formed with a deep annular recess on its inner side, substantially as described.
3. A stuffing box or like packing device of the kind specified in the preceding
claim in combination with segments arranged in recesses in one end of each of the
main rings so as to break joint with the joints in such rings, and a pair of flat
rings or washers arranged at the respective ends of the sleeve, one of the rings or
washers of each pair fitting the rod to be packed but not the stuffing box and the
other ring or washer of the pair fitting the stuffing box but not the rod, sub-
stantially as described.
4. The improved packing suitable for stuffing boxes and the like, herein before
'described with reference to and shown in Figs. 1, 2 and 3, or modified according
to Figs. 4 and 5 of the drawings annexed.
5. The modified construction of packing hereinbefore described with reference to
and shown in Figs. 6 and 7 of the drawings annexed.
Dated this 9th day of August 1897.
For the Applicant,
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.