Year: 1885

page_text: We, THOMAS ANDREWS of Hilton Street, Birkenhead in the County of Chester
and THOMAS GRANT of Kingsley Road Liverpool in the County of Lancaster,
Engineers do hereby declare the nature of this invention to be as follows:-
The object of this invention is to provide a simple, cheap and effective metallici
packing for glands, stuffing boxes and the like, through which a reciprocating rod
passes.
It consists of one or more metallic rings of external diameter to fit the stuffing
box with conical interior, into which fits a sectional conical bush, which internally
is bored to the size of the shaft.
In carrying out the invention, a stuffing box is formed in the usual manner with
a space to receive the packing and a cap or cover to screw down upon and compress
the same. One or more rings (preferably two or three) are turned, so that their
external diameter will be equal to the internal diameter of the stuffing box.
Internally the ring is bored conical, so that at its smallest internal diameter, it will
correspond with the diameter of the shaft or spindle to which it is to be applied.
Inside this ring is fitted a conical bush cut in two or more pieces and bored"
internally to fit the shaft. The several sections or pieces into which each bush is ·
divided, are formed at their edges to overlap or fit one into the other, so as to break
the opening at the joint that would otherwise be formed. The rings with the'
conical bushes thus formed, are inserted in the stuffing box, the shaft passed
through, and the cap or cover screwed down lightly. The action of the steam at
the inner side of the gland on the conical bushes will tend to force them into the
rings, and thus tighten their pressure in the spindle, preventing escape of steam.
A little fibrous packing may be placed between the rings and the cover of the
stuffing box for the purposes of lubrication, and to prevent any slight escape of.
steam between the walls of the stuffing box and the rings.

page_text: "
Improvements in Metallic Packing for Glands, Stuffing-boxes,
'
and the like.
We, THOMAS ANDREWS of Hilton Street, Birkenhead in the County of Chester
and THOMAS GRANT of Kingsley Road, Liverpool, in the County of Lancaster,
Engineers 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 :-
The object of this invention is to provide a simple cheap and effective metallic
packing for glands, stuffing boxes and the like, through which a reciprocating or
revolving rod or spindle passes.
The invention is best described by means of the accompanying drawings, in
which Figure 1 is a section of a stuffing box packed in accordance with our
invention; Figures 2 and 3 elevations of packing rings, and Figure 4 plan of inert
packing ring, with piston rod J in section."
A is the stuffing box, B gland, C studs for holding and tightening the same as
hitherto constructed. G internal cone packing with flat bottom resting on ledge E.
The space F below can be fitted with a gland as usual, or left unoccupied so that
the steam can press against the packing and assist in compressing and holding it
tight if not sufficiently compressed by the studs. I prefer F being thus unoccupied.
G inner conical packing with cylindrical interior. Houter complementary conical
packing, with cylindrical exterior. G¹ and H a second pair similar to G and H
respectively. The inner bushes G, G', cach cut in two or more pieces. The several
sections or pieces into which each bush is divided are formed at their edges to
overlap or fit one into the other, so as to break the opening at the joint that would
otherwise be formed, see Figure 3. I is a layer of fibrous packing of any ordinary
description, J is the piston rod.
In inserting the packing, the rings H with the conical bushes G are first inserted
in the stuffing box, the shaft passed through, the fibrous packing added and the cap
or cover screwed down lightly. The action of the steam at the inner side of the
gland on the conical bushes G will tend to force them into the rings H, and thus
tighten their pressure in the spindlo preventing escape of steain. The fibrous
packing I is preferably placed between the rings and the cover of the stuffing box
for the purposes of lubrication, and to prevent any slight escape of steam, between
the walls of the stuffing box, and the rings.
The mode of action is as follows:-
The gland being packed as described, the studs are screwed down so as to put a
pressure onto the packing sufficient to keep it tight. The amount of pressure
required differs with the steam pressure, and the dimensions of the stuffing box and
can be easily and only ascertained by the engineer by actual practice. The pressure
put on the packing should however preferably be a little more than sufficient to
overcome the pressure of the steam acting against the bottom of the packing,
abutting on space F, so as to enable the said packing to continually rest on its
seating E. Should however the gland wear slack, the steam pressing against the

page_text: bottom of the packing will press it up, and so keep it tight but a continual
knocking or grinding will be apt to take place, till the gland is further
tightened up.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1st. The metallic packing for glands stuffing boxes and the like, formed of one
or more pairs of packing rings, with wedge shaped cross section, one member of
each pair having an exterior conical surface, and the other a corresponding interior
conical surface, the one member of the pair being turned in its interior to fit close
against the rod, the other member being turned on its exterior to fit the walls of
the stuffing box, substantially as and for the purposes described.
2nd. The improvement in metallic packing for glands, which consists in forming
it of complementary wedge shaped rings, with or without other packing and with
the base of the bottom ring exposed to the steam, whereby the pressure of the steam
itself tends to maintain the packing tight, when insufficiently tightened by the
studs.
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