Improvements in Metallic Packing for Stuffing Boxes.
Year: 1896

page_text: Date of Application, 26th Aug., 1896
Complete Specification Left. 27th May. 1897-Accepted 10th July 1897
Date of Application, 26th Aug., 1896
Complete Specification Left. 27th May. 1897-Accepted 10th July 1897
[Communicated from abroad by FRANZ SCHOERNER, Draughtsman,
40A Garten Strasse, Berlin.]
Improvements in Metallic Packing for Stuffing Boxes.
I, JOSEPH MOWBRAY SCOTT, of Gosforth, in the County of Northumberland,
Commission Agent, do hereby declare the nature of said invention to be as
follows:-
The invention relates to the construction, method of fitting (facilitating ready
insertion, or withdrawal, without disturbance of the other parts of the engine) and
to the accurate adjustment of the packing against the rod and retaining it in
position endwise, also to means whereby lubricant can be conveyed to the rod from
the outside side of the stuffing box.
The packing ring is cast in halves and "mitred" externally at both ends to fit
corresponding internal "mitres" in a ring next to the "neck-ring" at the
bottom of stuffing box and in the inner end of a hollow or "lantern" ring, fitted
with springs, respectively. The joint of the two halves of the packing ring is made
by cutting it so as to form a "half-lap" in the "mitre" at each end which prevents
the passage of steam whilst allowing for the adjustment of the ring as it wears
against the rod. The spring or springs in the "lantern" ring abut against and
are compressed by the gland when sorewed home and by their re-action force the
packing, as it wears, with elastic action against the rod and the "lantern" ring
also serves an important purpose in retaining the packing rings in their proper
position lengthwise upon the rod. The "lantern" ring with the packing ring
and the "mitred" ring at the inner end of the stuffing box, are preferably enclosed
in an annular space between the rod and the stem of the gland, which extends to
the bottom of the stuffing box.
In another form, adapted to existing stuffing boxes, the tubular stem on the
gland may be dispensed with and the packing ring, "lantern" ring and the ring
at the inner end inserted as into an ordinary stuffing box the gland in this case
being of the usual form.
The "lantern" ring and the "mitred" ring at the inner end of the stuffing
box are preferably made in halves for convenience of insertion' and withdrawal
and may also be "half-lapped" at the joint to keep the two halves in position.
Lateral automatic adjustment of the packing to the rod is provided by the
"lantern" ring and the "mitred" ring at the inner end of the stuffing box
effectually being bored slightly larger than the diameter of the rod so that, if the
rod is strained or out of truth, the packing will allow for any such irregularity
with what is called "floating" adjustment.
Lubricant is introduced through a channel, drilled in the stuffing box, opening
into an aperture in the stem of the gland, to the outside of the "lantern" ring.
whence it passes by apertures provided in the latter to the rod.
Dated this 95th day at Amount 1000

page_text: I, JOSEPH MOWBRAY SCOTT, of (iosforth, in the County of Northumberland,
Commission Agent, 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 invention relates to the construction, method of fitting (facilitating ready
insertion, or withdrawal, without disturbance of the other parts of the engine) and
to the accurate adjustment of the packing against the rod and retaining it in
position endwise, also to means whereby lubricant can be conveyed to the rod from
the outside of the stuffing box.
"
The packing ring is cast in halves and mitred " externally at both ends to fit
corresponding internal "mitres" in a ring next to the neck-ring' at
bottom of stuffing box and in the inner end of a hollow or "lantern" ring, fitted
with springs, respectively. The joint of the two halves of the packing ring is made
by cutting it so as to form a "half-lap" in the "mitre" at each end which prevents
the passage of steam whilst allowing for the adjustment of the ring as it wears
against the rod. The spring or springs in the lantern" ring abut against and
are compressed by the gland when screwed home and by their re-action force the
packing, as it wears, with elastic action against the rod and the "lantern" ring
also serves an important purpose in retaining the packing rings in their proper
position lengthwise upon the rod. The lantern" ring with the packing ring
and the "mitred" ring at the inner end of the stufling box, are preferably enclosed
in an annular space between the rod and the stem of the gland, which extends to
the bottom of the stuffing box.
In other form, adapted to existing stuffing boxes, the tubular stem on the
gland may be dispensed with, and the packing ring, "lantern" ring and the
mitred" ring at the inner end inserted as into an ordinary stuffing box,
the gland in this case being of the usual form.
The "lantern" ring and the "mitred" ring at the inner end of the stuffing
box are preferably made in halves for convenience of insertion and withdrawal
and may also be "half-lapped" at the joint to keep the two halves in position.
Lateral automatic adjustment of the packing to the rod is provided by the
"lantern" ring and the "mitred" ring at the inner end of the stuffing box
being bored slightly larger than the diameter of the rod so that, if the
rod is strained or out of truth, the packing will allow for any such irregularity
with what is called "floating" adjustment.
Lubricant is introduced through a channel, drilled in the stuffing box, opening
into an aperture in the stem of the gland, to the outside of the lantern riag
whence it passes by apertures provided in the latter to the rod.
DESCRIPTION OF DRAWINGS.
"
On the acompanying drawings my invention is shewn in three forms in which
it may be practically applied, Fig. 1 shewing it with a coiled spring around the
"lantern" ring, Fig. 2 as with two or more coiled springs enclosed in cavities in
the "lantern" ring, and Figs. 3, 1, and 5, shewing a modification of the "half-lap
joint of the packing ring in which provision is made for preventing the packing
being forced in so as to seize the rod by projecting ridges formed at the joint,
the edges of which are pressed closely together by the gland and springs, and,
being of soft metal, will yield by crushing as the packing rings close on the rod,
or instead of such ridges I may insert at the joint strips of packing of lead or
other soft metal or of Asbestos or other yielding material.

page_text: Referring to l'ig. 1 A. is the pucking ring cast in halves and "mitred" externally
at each end to fit corresponding internal "mitres" in a ring B. which may be
formed upon the neck ring C. at the bottom of the stuffing box, and in the inner
end of a hollow or lantern" ring D. respectively. The joint of the two halves
of the packing ring is made by cutting it so as to form a "half-lap" in the
"mitre" at each end which prevents the passage of steam whilst allowing for
adjustment as the packing wears against the rod. The coiled spring E around the
"lantern" ring is compressed, as the gland F. is screwed down against the
shoulder on the lantern ring, the packing ring A. being thus forced against
the rod between the "lantern" ring and the mitre" B. upon the "neck-ring" C.
The gland F. has a long tubular stem G. which encloses the "lantern ring
the coiled spring and the packing ring, and, when the gland is screwed home,
"bottoms" against the "neck-ring" C. which is preferably in halves and "half-
lapped" as is the bush H. in the gland and also the "lautern," for convenience of
application around the rod. Luteral automatic adjustment of the packing ring to
the rod is secured by the "lautern" ring D. and the "mitred" neck-ring C. being
bored slightly larger than the diameter of the rod, so that, if the latter is strained
or out of truth, the packing will allow for any such irregularity with what is
termed "floating" action.
Lubricant may be introduced through a channel J. drilled into the stuffing box
opening into an oblong aperture K. in the tubular stem G. of the gland and thence
through anertures L. in the "lantern" ring it reaches the rod.
Fig. 2 shews precisely the same construction and arrangement of the various
parts, except that the coiled spring E. around the "lantern" ring is replaced by
small coiled springs E. inserted in cavities in the "lantern" ring, between the
bottoms of which cavities and the gland they are compressed.
In applying this packing to an existing stuffing box the gland E. and the neck-
ring C. will be of the ordinary form, and the "lautern" ring D. the packing A.
and the "mitred" ring B. inserted above the neck-ring C., will be enclosed by the
stufling box without the tubular stem G.
Referring to Figs. 3, 4, and 5, Fig. 3 is a plan, one half in section, through the
line on Fig. 4; Fig. 4 is a view at on Fig. 3, at the joint between the
two halves of the packing ring; and Fig. 5 is an external side view of the packing
rings. The ridges M. will preferably be cast upon the two halves of the ring and
form a close joint, see Fig. 3, for the purpose hereinbefore stated; or 1 may,
instead of these ridges, insert at the joint strips of lead or other soft metal or of
asbestos or other suitable yielding material. In order to prevent damage to the
packing ring or other parts, I propose to apply ferrules O. around the gland bolts
to prevent undue screwing home of the gland, and this provision will also prevent
the packing ring being caused to seize the rod. The "mitres" of the packing
and of the lantern" and neck rings sare shewn at an angle of 450, but I may vary
this angle to suit various cases and prevent undue gripping of the rod.
Having now particularly described and ascertained the nature of said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
"
1st. The improvements in metallic packing for stuffing boxes consisting in
forming externally in double "mitred "packing rings a "half-lap" joint in both
mitres so as to allow adjustment of the packing to the rod as it wears, without
allowing steam to pass, or the modified form in which, in addition to the "half-
Jap," longitudinal ridges are provided or strips of lead or soft melal, or other
suitable compressible substance, are inserted, substantially as described and
shewn.
2nd. In such metallic packing the application of an internally "mitred " lantern
ring, an internally "mitred" neck ring with springs to give elastic adjustment to
he screwing inward of the gland, and the formation of the glaud with a tubular
tem enclosing the packing, the "lantern" ring and the springs, or the alternative

page_text: fitting to an ordinary stuffing box and gland; substantially as described and in
one form shewn.
3rd. In such metallic packing the provision for lubrication of the packing and
rod by a channel from outside the stuffing box leading into an oblong aperture in
the tubular stem of the gland and thence through apertures in the "lantern" ring
to the rod, or, in ordinary stuffing boxes and glands into the "lantern" ring direct
and thence to the packing end rod; substantially as described and shewn.
4th. The improvements in metallic packing for stuffing boxes comprising the
various parts arranged in combination, constructed and operating substantially
as shewn and described with the objects hereinbefore stated.
J. RICHARDSON,
10 Ridley Terrace, Felling-upon-Tyne,
Agent for the Applicant.