Improvements in Metallic Packing for Piston Rods, Shafts, and the like.
Year: 1891

page_text: Date of Application, 17th Dec., 1891
Complete Specification Left, 17th Sept., 1892-Accepted, 26th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Metallic Packing for Piston Rods, Shafts, and
the like.
We, SHOLTO DOUGLAS, of 23 Adelphi Place, Salford, in the County of
Lancaster, Engineer, and HARRY WELFITT NICHOLLS, of 1 Cooper Street,
Manchester, in the said County, Solicitor, do hereby declare the nature of this
invention to be as follows :-
Our invention relates to improvements in metallic packing for piston rods shafts
and the like and our improvements consist in certain combinations and arrangements
of the parts forming the packing whereby a good joint is made and maintained by
the automatic adjustment of the parts as wear takes place.
On the piston rod shaft or other part to be packed we place a ring of segments
which are surrounded by a second ring of segments which in their turn are inclosed
within a sleeve or bush fitted within the gland or stuffing box and provided with a
flange at one end bored to fit the piston rod or shaft.
The second ring of segments are arranged so that they break joint with the first
ring of segments and springs are preferably placed between the first and second
segmental rings and between the second segmental ring and the sleeve so as to
constantly keep the packing up to the piston rod or shaft. A spring is also by
preference placed at the bottom or end of the stuffing box so as to bear against the
Hange of the sleeve or bush and constantly press the packing longitudinally against
the cover of the gland or stuffing box.
Dated this 16th day of December 1891.
H. B. BARLOW,
Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Metallic Packing for Piston Rods, Shafts, and
the like.
We, SHOLTO DOUGLAS, of 23, Adelphi Place, Salford, in the County of
Lancaster, Engineer, and HARRY WELFITT NICHOLLS, of 1, Cooper Street,
Manchester, in the said County, Solicitor, 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:-
Our invention relates to improvements in metallic packing for piston rods, shafts
and the like, and our improvements consist in certain combinations and arrange-
ments of the parts forming the packing whereby a good joint is made and maintained
by the automatic adjustment of the parts as wear takes place.
On the piston rod, shaft or other part to be packed we place a ring of segments
which are surrounded by a second ring of segments. A sleeve or bush is fitted
within the gland or stuffing box, and is provided with a flange at one end bored to
fit the piston rod or shaft.
The second ring of segments are arranged so that they break joint with the first
ring of segments, and springs are preferably placed so as to constantly keep the
segmental ring packing up to the piston rod or shaft. A spring is also by
preference placed at the bottom or end of the stuffing box so as to bear against the
sleeve or bush and constantly press the packing longitudinally against the cover of
the gland or stuffing box.
And in order that our invention may be fully understood and readily carried into

page_text: effect we will describe the accompanying sheet of drawings reference being had to
the figures and letters marked thereon.
Figure 1 is a longitudinal section, taken on the plane of the line A B, Fig. 2, of
the improved metallic packing as applied to a piston rod or shaft.
Figure 2 is a longitudinal section, taken on the plane of the line C D, Fig. 1, of
the gland or stuffing box, the metallic packing shown in section in Fig. I being
here shown in full lines.
Figure 3 is an end view of the segmental rings.
In these views a denotes the piston rod or shaft to be packed, the gland or
stuffing box and c the cover secured thereto by bolts d, ee are a pair of segmental
rings placed next the part a, and is the second ring of segments surrounding the
first, and encircled by the spring g. The spring g is shown as a coiled spring but
it may be of any suitable form and we may if desired fit a spring between the outer
and inner rings fand e respectively.
The flanged sleeve his fitted upon the piston rod or shaft a and its flange bears
against the packing against which it is constantly pressed by the spring compressed
between the end of the sleeve h and the gland b. We prefer to employ pins which
enter holes in the flange and the contiguous ring of segments f in order to guide
and keep the latter in their place.
In some cases where there is ample room we may place the segmental rings ef
and the spring or springs confining the same within the sleeve which would in
such case be made of suitable size to receive the same.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is to be performed we declare that what we
aim is
The improved metallic packing consisting of the inner and outer rings of
segments held in their places by a coiled or other spring g and combined with the
sleeve either with or without the spring i substantially as herein set forth.
Dated this 16th day of September 1892.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicants.