Improved Packing for Pistons and the like.
Year: 1890

page_text: Date of Application, 18th Dec., 1890
Complete Specification Left, 18th Sept., 1891-Accepted, 24th Oct., 1891
PROVISIONAL SPECIFICATION.
Improved Packing for Pistons and the like.
I, WILLIAM Lockwoon, of Ocean Works, St. Mary's Road, Sheffield,
Yorkshire, England, Engineer, do hereby declare the nature of this 'invention
to be as follows:-
This invention relates to certain improvements in or applicable to the formation
of spring packing rings used for expanding and distending the rings of pistons
and analogous parts of steam engines and other apparatus; and 'to the closing
pieces of the piston rings.
The improved packing rings are formed with independent separating segments of
the improved formation hereinafter described serving to tend to keep 'the piston
rings apart, and which are combined with intermediate diametrically expanding
segments serving to effect the diametrical expansion of the piston rings; such parts
being made of suitable metal and so co-acting as that when confined within and
between the piston rings they will mutually support each other and have the desired
action in an improved manner.
The said separating segments may each consist of separate opposite 'bowed 'or
equivalently formed parts held together adjacent to each end by washers shrunk
thereon, or of one piece drilled adjacent to the ends and split between the 'drill-
holes and hammered apart so as to form opposing outwardly curved parts. The
ends of such segments are adapted to project 'beyond 'the washers so as to enter and
support the said diametrically expanding segments.
Such lastly referred to segments are preferably made of shorter lengths than
the said separating segments, and may each consist of a rod or 'bar helically coiled
about a circular, oblong or oval core, so as to be adapted, when confined within
and between the piston rings and between the separating segments, to give a
powerful diametrical expanding action directly to the piston rings, and to give a
powerful end thrust to the separating segments, causing each thereof to tend 'to
open wider apart and consequently to tend to separate the piston rings against
which they respectively bear, the resistance presented by the piston rings re-acting
through the separating segments and tending to cause the said intermediate segments
to tend to have the desired diametrical expanding action.
In lieu of forming the said separating segments in the manner hereinbefore
referred to, they may each be formed in one piece of a wavy formation and 'used
conjunctively with the coiled diametrically expanding segments as aforesaid.
The meeting ends of the split piston rings are made with angular 'recesses
adapted to receive correspondingly formed closing pieces, the parts being so arranged
as to have a compensating effect, so that the openings between the meeting ends of
the packing rings will be kept more effectively closed than with the closing pieces
in present 'use.
Dated this 17th day of December 1890.

page_text: Q
Improved Packing for Pistons and the like.
I, WILLIAM LOCKWOOD of Ocean Works, St. Mary's Road, Sheffield,
Yorkshire, England, 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 certain improvements in or applicable to the formation
of spring packing rings used for expanding and distending the rings of pistons and
analogous parts of steam engines, and other apparatus; and to the closing pieces
of the piston rings.
On the accompanying drawings,
Figure 1, represents a plan view of the improved packing in position within a
piston ring.
Figure 2 represents a sectional elevation of the same on the plane a-b, Figure 1.
Figures 3 and 4 represent modifications hereinafter referred to, and
Figure 5 represents the improved ring closing pieces.
The improved packing rings are formed with independent separating segments A,
of the improved formation hereinafter described serving to tend to keep the piston
rings B, apart, and which are combined with intermediate diametrically expanding
segments C, serving to effect the diametrical expansion of the piston rings, such
parts A, C, being-made-of-suitable -metal-and-so co-acting as that when confined
within and between the piston rings-they will mutually support-each other and
have the desired action in an improved manner.
The said separating segments A. may each consist of separate opposite bowed or
equivalently formed spring parts 6, held together adjacent to each end by
washers 7, shrunk thereon, or vide Figure 3 of one piece 6, drilled adjacent to the
-ends and split between-the drill holes and hammered apart so as to form opposing
outwardly curved parts as represented by the dotted lines-in-Fig.3. -The-ends-8,
of such segments 6, are adapted to project beyond the washers 7, so as to enter and
support the said diametrically expanding segments C.
Such lastly referred to segments are preferably made of shorter lengths than
the said separating segments A, and may each consist of a rod or bar helically
coiled about a circular, oblong or oval core, so as to be adapted, when confined
in and between the piston rings B, and between the separating segments A, to give
a powerful diametrical expanding action directly to the piston rings, and to give a
powerful end thrust to the separating segments, causing each thereof to tend to
open wider apart and consequently to tend to separate the piston rings against
which they respectively bear, the resistance presented by the piston rings re-acting
through the separating segments and tending to cause the said intermediate
-segments-C,-to-tend-to-have-the-desired-diametrical-expanding action.
In lieu of forming the said separating segments A, in the manner hereinbefore
referred to, they may each be formed in one piece of a wavy formation vide Fig. 4
and used conjunctively with the coiled diametrically expanding segments C, as
aforesaid.
The meeting ends of the split piston rings B, are made of an angular formation
as at 9, adapted to receive a correspondingly formed closing piece 10, which is thrust
outwardly by a spring 11, entering a recess therein and bearing against a piece 12,
slotted at 13, and secured to the piston ring by bolts 14, the parts being so arranged
as to have a compensating effect, so that the opening between the meeting ends of
the packing ring will be kept more effectively closed than with the closing pieces
in present use.

page_text: 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 I
claim is :-
1. The formation of packing for pistons and the like with independent separating
segments of the improved formation hereinbefore described serving to tend to keep
the piston rings apart, in combination with intermediate diametrically expanding
segments, serving to effect the diametrical expansion of the piston rings, such parts
so co-acting as, that when confined in and between the piston rings they will
mutually support each other, and have the desired action in an improved manner.
2. The modification herein before described with reference to Figure 4.
3. The improved means of closing the opening between the ends of piston rings
as herein before described with reference to Figure 5.
Dated this 18th day of September 1891.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C., Agents for the Applicant.