Improvements in and relating to the Packing for Steam Pumps.
Year: 1896

page_text: Date of Application, 30th Jan., 1896
Complete Specification Left, 29th Oct., 1896-Accepted, 12th Dec., 1898
Improvements in and relating to the Packing for Steam Pumps.
1, JAMES WEIR of Holm Foundry, Cathcart County of Renfrew North
Britain Engineer, do hereby declare the nature of this invention to be as
follows:-
It comprises improvements in and relating to the rings constituting the packing
for rendering fluidtight the buckets, pistons, plungers and rods of steam pumps.
The objects are to render more efficient and diminish the tear and wear of these
articles, especially when subjected to the high pressures now in common use for
modern steam engines.
This invention, according to one modification, consists of a combination of parts
forming the packing of a piston or bucket when it is arranged to receive the packing
between the body flange and the junk ring.
The parts forming the packing are; the packing rings, the backing rings, and
the flange rings.
The packing rings are of the usual square or rectangular section, made to fit the
cylinder or chamber, and cut in the usual manner. The backing rings are of
similar section and uncut, and made smaller in diameter to go inside the packing
rings. The flange rings are square or rectangular, and are made broad enough
to receive both the packing and backing rings on either surface. These rings
are fitted between the body flange and the junk ring of the piston or bucket,
placed alternately to fill in the space. They are all free on their inner edges, so
as to allow the outer edges of the packing and flange rings to accommodate them-
selves to the bore of the chamber, without bearing on the body of the piston or
bucket.
According to another modification, when the pistou or bucket is made solid and
has grooves turned in it for the packing, both backing and packing rings are cut
to allow of their being put in their places.
According to another modification, the backing ring is made of tough metal
such as wire, and is placed in the material of which the packing ring is made; as,
for instance, if the packing ring be made of white metal, this backing ring is placed
in the mould in which the ring is to be cast, and if the packing ring be made of
some composition such as ebonite this backing ring is put in the mixture during its
manufacture.
According to another modification, when the packing is fitted to a plunger or
rod, a recess is made in the stuffing gland. The packing rings are cut, and placed
in the recess, a space being left outside or behind the rings to allow the soft or
loose packing to get behind the rings and back them up to the rod or plunger and
fill the openings at the cut parts of the rings.
m
den of January 1806

page_text: Improvements in and relating to the Packing for Steam Pumps.
I, JAMES WEIR of Holm Foundry Cathcart, County of Renfrew North
Britain 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 :-
It comprises improvements in and relating to the rings constituting the packing
for rendering fluidtight the buckets, pistons, plungers and rols of steam pumps.
The objects of the invention are to render more efficient and diminish the tear
and wear on these parts, especially when subjected to the high pressures now in
common use for modern steam engines.
In order that my said invention and the manner of performing it may be properly
understood hereunto append three sheets of explanatory drawings to be
hereinafter referred to in which:
On Sheet 1 Figures 1 to 5 illustrate one modification of the invention:
On Sheet 2 Figures 6 to 9 illustrate another modification thereof and
On Sheet 3 Figures 10 and 11 illustrate a further modification of it as applied to
the plunger or rod of a steam pump.
This invention according to one modification shown in Figures 1 and 3 consists
of a combination of the parts D, E, E' and F', together forming the packing of a
piston or bucket A, a', and B when it is arranged to receive the packing between
the body flange A, a' and the junk ring B.
The parts forming the said pump packing are-the packing rings F, the backing
rings E, E, and the flange rings D.
The
The packing rings F are of the usual square or rectangular section, made to fit
the cylinder or chamber of the pump, and cut at f in the usual manner.
backing rings E are of similar section to those marked F and uncut, and made
smaller in diameter to go inside the packing rings F or flexible backing ring E¹.
The flange rings D are square or rectangular, and are made broad enough to
receive both the packing and backing rings F and E on their surface as shown in
Figs. 1 to 5. These rings D, E, E and F, are fitted between the body flange A
and the junk ring B of the piston or bucket, and are placed alternately as shown in
Figs. 1, 2, and 4, completely filling in the space. They are all free on their inner
edges, so as to allow the outer edges of the packing and flange rings to accommodate
themselves to the bore of the cylinder or chamber, without bearing on that part of
the piston or pump body marked a¹.
According to another modification as shown in Figs. 6 and 7 wherein the piston
or bucket Gor H is made solid and has grooves g' or ' turned in it for the
reception of the packing, both backing and packing rings F, f, E, are cut to
allow of them being put in their places.
According to another modification a backing ring such as e Figs. 7 and 9 is
formed of tough metal or wire, and is placed in a space behind the packing
ring F as shown in Figs. 7 and 9 or in the material of which the packing ring
is made as shown by the dotted lines on 1, Fig. 8. For instance, if the packing
ring For is to be made of white metal, this wire backing ring (or f-Fig. 6)
is placed in the mould in which the packing ring For is to be cast and it
becomes embedded therein as shown by the dotted lines upon f¹ in Fig. 8 and if the
packing rings F are made of some indiarubber composition, such as ebonite shewn
by F, Figs. 1, 2, 4 and 7, and by f1 Fig. 6, the wire ring e or f is put in the
mixture during the manufacture of the said packing ring.
According to another modification, the packing rings, which are fitted to a
plunger or rod J, Figs. 10 or 11, are placed within a recess k³ or ', which is made

page_text: in the stuffing gland K or K. The packing rings j', are cut in order that they
may be placed in the recess or k, a space being left in the said recess behind
the rings to allow the soft or loose packing material M contained in the stuffing
box L to get behind the rings and back them up to the rod or plunger J and fill
up any opening at the cut part of the rings when the gland K or K₁ is tightened
up by means of the screwed bolt N.
The rings D, E, E', and F constituting the packing of a pump such as herein
described are designed for being put together in any multiple arrangement such as
those shown in Figs. 1 to 5.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
First. The combination of packing, backing, and flange rings D, E, E' and F
forming the packing of a steam pump all substantially as shown in Fig. 1 of the
drawings or any mere modification thereof for the purposes specified.
Second. The combination of packing, backing and flange rings, D, E, and F
forming the packing of a steam pump all substantially as shown in Figure 2 of the
drawings or any mere modification thereof for the purposes specified.
Third. The combination of backing and packing rings E and f forming the
packing of a steam pump all substantially as shown in Figure 6 of the drawings or
any mere modification thereof, for the purposes specified.
Fourth. The combination of packing and backing rings e² and F forming the
packing of a steam pump all substantially as shown in Figure 7 of the drawings or
any mere modification thereof for the purposes specified.
Fifth. The combination with a rod or plunger of the rings or j and stuffing
gland K, K2, K³, or K, K2, K, all substantially as herein described, and drawn
with reference to Figs. 10 and 11 of the drawings or any mere modification thereof
for the purposes specified.
Dated this Twenty-eighth day of October 1896.