Improvements in Stuffing Box Packing.
Year: 1895

page_text: Date of Application, 20th Apr., 1895
Complete Specification Left, 20th Jan., 1896-Accepted, 22nd Feb., 1896
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PROVISIONAL SPECIFICATION.
Improvements in Stuffing Box Packing.
We, CHARLES CHRISTOPHER BRAITHWAITE, of Kirkwick, Harpenden, in the
County of Herts, Engineer, and JOHN HOWELL HOSGOOD, of 16 Park Crescent,
Barry, in the County of Glamorgan, Engineer, do hereby declare the nature of
this invention to be as follows:-
:-
This invention has reference to a kind of stuffing box packing we call adjustable
floating metallic packing, the object of the invention being to produce a soft metal
packing such as will be less liable to give way than are soft metal packings as
ordinarily constructed. To this end we use a number of soft metal rings around
the red to be packed and we protect the soft metal rings by the interposition
between them of partitions of hard metal kept at fixed distances apart, the
arrangement being such that the soft metal rings may be said to be enclosed in a
kind of protecting cage. An arrangement of such a packing is as follows:-
Around the rod to he packed we place rings of soft metal each within a metal
ring that is made of a channel section so as to surround the upper lower and outer
sides of the soft metal ring, these surrounding channelled rings being made in two
or more parts to facilitate placing them in position around the soft metal rings.
Surrounding the channelled rings is a tube we call a cage which is made with an
internal flange at one end and fits within the stuffing box so as to enclose the
channelled rings; the cage being also made in two or more parts.
By the use of channelled rings in conjunction with soft metal as above set forth
we produce a compound metallic packing in which the soft metal being in
comparatively small parts fortified by the channelled rings will be less liable to
give way than are soft metal packings as commonly used.
We, CHARLES CHRISTOPHER BRAITHWAITE, of Kirkwick, Harpenden, in the
County of Herts, Engineer, and JoHN HOWELL HOSGOOD, of 16 Park Crescent,
Barry, in the County of Glamorgan, 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 :-
This invention has reference to a kind of stuffing box packing we call adjustable
floating metallic packing, the object of the invention being to produce a soft metal
packing, such as will be less liable to give way than are soft metal packings as
ordinarily constructed. To this end we use a number of soft metal rings around
the rod to be packed and we protect the soft metal rings by the interposition
between them of partitions of hard metal kept at fixed distances apart, the
Price 37

page_text: arrangement being such that the soft metal rings..may be said to be enclosed in a
kind of protecting cage.
In the accompanying illustrative drawings,
Fig. 1 is a central longitudinal section and Fig. 2 a cross section on the line AB
of Fig. 1, showing an arrangement of such a packing in a stuffing box for a
piston rod.
Fig. 3 is a detail view.
Around the rod 1 to be packed are placed rings 2 of soft metal such as Babbitts
metal or white metal, each ring being within a hard metal ring 3 that is made of a
channel section so as to surround and nearly enclose the soft metal ring within it
on all sides except that next the. rod 1, these surrounding channelled rings, being
made in two or more parts, two semi-circular parts are shown, to facilitate placing
them in position around the soft metal rings. Surrounding the channelled rings 3,
which may be of brass, is a tube 4 we call a cage, which is made with an internal
flange 4ª at one end, and fits within the stuffing box 5 so as to enclose the channelled
rings as shown.
The soft metal rings, and also the cage 4, are preferably made in segments or
parts, as shown, to facilitate their being placed in position, the adjacent ends
of the said rings being made to overlap as shown in elevation in Fig. 3.
The soft metal rings are, in the example, kept in close contact with the rod 1 by
flat metal adjusting springs 6 that are located between the outer peripheries of the
soft metal rings, and the inner peripheries of the channelled rings 3; and are held
in place by projection 6ª on them entering holes 3° in the rings 3. The rings 2
and 3 with interposed springs 6 can be packed around the outwardly extending
portion of the rod 1 and within the tube or cage 4 and then the whole be pushed
as one body into the stuffing box and secured in the ordinary manner.
By the use of channelled rings 3 in conjunction with soft metal as above set
forth, we produce a compound metallic packing in which the soft metal, being in
comparatively small parts fortified by the channelled rings, will be less liable to
give way than are soft. metal packings as commonly used.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A stuffing box packing, comprising soft metal packing rings in combination
with interposed partitions of hard metal kept at fixed distances apart, substantially
as herein described for the purpose specified.
2. A stuffing box packing comprising rings of soft metal, hard metal rings of
channelled section surrounding and nearly enclosing the soft metal ring on all sides
except that next the rod or body to be packed, and a tube or cage with internal
flange surrounding the channelled rings, substantially as herein described.
3. The hereinabove described adjustable floating metallic stuffing box packing
substantially as shown.
Dated this 20th den of Janua190