Improvements in Packings for Stuffing Boxes.
Year: 1895

page_text: Date of Application, 30th Jan., 1895
Complete Specification Left, 30th Oct., 1895-Accepted, 3ûth Nov., 1895
PROVISIONAL SPECIFICATION.
Improvements in Packings for Stuffing Boxes.
I, PERCY REDFORD, of 16 Ashland Avenue, Wigan, in the County of Lancaster,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to packings for stuffing boxes, and its objects are to
enable the packing to be applied readily and conveniently, and to resist high
temperatures.
In the gland, or in a lining or a portion of the stuffing box, I form a conical
recess concentric with the piston-rod, spindle, shaft, or the like, and with its base
outwards. The packing itself consists of anti-friction metal, cast or formed in
halves or segments to fit within the recess around the rod or the like. The packing
is retained in place by spring pressure, by an adjustable screw or adjustable screws
or nuts, or by other suitable devices.
To remove and replace the packing it is necessary only to remove and withdraw
the cover of the stuffing box, when the segments of packing may be at once removed
and replaced.
Dated this 29th day of January A.D. 1895.
WILLIAM E. HEYS,
Agent for the Applicant.
Improvements in
I, PERCY REDFORD, of 16 Ashland Avenue, Wigan in the County of Lancaster,
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 relates to packings for stuffing boxes, and its objects are to
enable the packings to be applied readily and conveniently, and to resist high
temperatures.
In the gland, or in a lining or portion of the stuffing-box, I form a conical
recess concentric with the piston rod, spindle, shaft or the like, and with its base
outwards. The packing itself consists of antifriction metal cast or formed in
halves or segments to fit in the recess around the rod or the like. The packing is
retained in place by spring pressure, by an adjustable screw or adjustable screws
or nuts, or by other suitable devices.
To remove and replace the packing it is necessary only to remove and withdraw
the cover of the stuffing box, when the segments of packing may be at once removed
and replaced.
I will describe my improvements with reference to the accompanying drawings,
which illustrate in longitudinal section, two forms in which the packing may be
employed.
In each of the figures similar parts are denoted by similar letters of reference.
As illustrated by Figure 1, and generally, the conical recess is produced in a
sleeve, or in a liner, or both, so as to avoid any structural alteration of the stuffing

page_text: box itself. The sleeve A is constructed to fit accurately in the stuffing box, and is
preferably enlarged at the inner end, B, to provide space for any condensed steam
which may accumulate. Within the sleeve there is fitted the liner C, which is
coned outside to fit the sleeve, and inside to receive the conical antifriction metal
packing P, which is divided longitudinally into two or more segments. A shoulder D
is formed upon the outer end of the packing, upon which is fitted the hard metal
ring E. In a recess in the cover F there is arranged around the piston rod Ga
spiral spring H, which abuts upon the ring E and thus tends to force the packing
into the conical recess.
In the modification illustrated by Figure 2, the packing is constructed in such a
manner as to form three parallel longitudinally divided rings, but a greater or less
number of the rings may be used. The ring E, instead of fitting upon a shoulder
on the packing, is constructed with a bevelled lower edge, which rests upon a
correspondingly bevelled upper edge of the outer ring. As before, the packing is
forced inwards by the action of the spring H. The sleeve A has its lower end
substituted by the block I, in which the enlarged space is formed.
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
claim is
1. In packings for stuffing boxes, a longitudinally divided ring or rings of anti-
friction metal, fitting upon the rod or shaft and within a conical recess in the
stuffing box, constructed and arranged substantially as hereinbefore described with
reference to the accompanying drawings.
2. Packings for stuffing boxes, constructed and arranged substantially as herein-
before described and as illustrated by the accompanying drawings.
Dated this 29th day of October 1895.
W. E. HEYS & SON,
Agents for the Applicant.