Improvements in Metallic Packings for Piston and other Rods, and the like.
Year: 1898

page_text: Improvements in Metallic Packings for Piston and other Rods, and
the like.
We, JAMES GREEN, 29, Brunswick Avenue, Newington, Hull, Engineer, and
GLENFORD RICHES, 553, Hessle Road, Hull, Engineer, do hereby declare the nature
of this invention to be as follows:-
In a usual piston or valve rod, we surround the rod with a brass or metal ring
(called hereafter the brass ring) which may be a tight or slack fit in stuffing box,
and which may be either solid, or cut in halves, length ways, or made equal to solid
by clipping same or bolting together, this brass ring we make say about two thirds
or so of the depth of the stuffing box, in length; we taper this on the inside from
each end, so that the smallest diameter is about half length of the ring, and into
each of these tapered annular spaces between the brass ring and rod, we fit our
tapered metallic packing of white metal, which we cut lengthways into three or
more segments, these segment cuts at the neck ring end where it fits the neck ring
which may be flat bevelled or rounded, we fit cod peices, or we make an annular
recess in same next to rod into which we fit a metal ring in two pieces which
break-joints the segmant cuts. The segment cuts on gland end of our tapered
packing, we cover with a flat metal ring, preferably in two pieces, or we may fit
segments cuts with cod pieces and then cover these with our flat ring.
The space between the flat ring and mouth of stuffing box, we fill with one or
more turns of soft or other packing, which when screwed up by the gland presses
against our flat ring on to our tapered metallic packing, thus pressing same against
the piston or other rod.
Improvements in Metallic Packings for Piston and other Rods, and
the like.
We, JAMES GREEN, of 29, Brunswick Avenue, Newington, and GLENFORD RICHES,
of 553, Hessle Road, both in Hull, in the County of York, Engineers, do hereby
declare the nature of this invention and in what manner the same is to be
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page_text: performed, to be particularly described and ascertained in and by the following
statement:
This invention has for its object to effect improvements in metallic packings for
piston rods, valve rods, or other rods generally in connection with which a steam
tight gland is essential without undue friction between the rod and the gland
packing.
According to this invention the usual piston or valve rod is surrounded with a brass
or metal ring hereinafter called the brass ring which forms a double conical space
for the reception of the packing which is seated therein in segments, and enclosed
by suitable rings, so that a turn of the stad screws of the gland will apply the
packing against the rod with any required degree of pressure bearing equally
round the surface of the piston or valve rod.
The advantages derived from our invention are that an efficient metallic packing
is provided which is adjustable in respect of contact pressure with the piston or
other rod which bears equally round the surface of the rod consequently less packing
is used and less wear takes place on the rod whilst a better surface is maintained
combining a steam-tight contact with absence of undue friction.
Having described the nature of our improved metallic packing and its utility,
we will now proceed further to explain the same and the manner by which our said
invention is to be carried into practice by referring to the drawing hereto
annexed.
Fig. 1 represents a longitudinal sectional view of a stuffing box showing the
improved metallic packing placed therein and its form and the manner of arranging
it in the box and around a piston rod; corresponding to which Fig. 2 is a sectional
plan view taken on line x x of Fig. 1.
a is the piston rod; b the stuffing box, and c the gland. The rod a is surrounded
with a brass or metal ring d, hereinafter called the brass ring, which may be either
a tight or slack fit in the stuffing box, and which may be either solid or cut in
halves or made equal to solid by clipping same or bolting together. This brass ring
we make, say about two thirds or so of the depth of the stuffing box in length, and
it is tapered on the inside from each end, so that the smallest diameter is about half
the length of the ring. Between this ring d and the rod a is formed conical or
tapered annular recesses into which is fitted the tapered metallic packing of white
metal which is cut longitudinally preferably into three segments ele² e³ and e¹ e5 e6
respectively. At the neck end of the stuffing box which is fitted with the usual
neck ring f, the segments may be flat at the ends, bevelled or rounded; and in
order to cover up the joints of the segments e¹ e² e we may fit cod pieces or make
an annular recess in the segments next to the rod a into which recess is fitted a
metal ring g in two pieces. In order to cover the joints of the segments et es e at
the gland end of the packing we employ a flat metal ring h preferably in two pieces,
or we may fit the segments with cod pieces and then cover same with the flat ring h.
The space between the flat ring h and the inner end of the gland c is filled with one
or more turns of soft hemp or other packing i which on being screwed up by the
gland c presses against the flat ring hon to the tapered metallic packing ele² e³ e4 e5 e6
thus causing the said packing to bear equally round the surface of the piston or
other rod. As wear takes place the segments of the tapered metallic packing are
pressed in between the brass ring and the piston rod by a turn of the gland screws
thus keeping the packing in steam tight contact with the rod. In order more
effectually to prevent the escape of steam the divisions between the segments of
the tapered metallic packing are made diagonally and arranged to break joint.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The particular arrangement and combination of parts constituting a metallic
packing for piston and other rods in which the usual piston or valve rod is surrounded

page_text: by a brass or metal ring such as d forming a double conical span for the reception
of the metallic packing in tapered segments such as e¹ e² e³ et e5 eo which are seated
therein and confined by suitable rings so that a turn of the stud screws of the gland
adjusts the packing to the rod substantially as and for the purpose hereinbefore
described with reference to the accompanying drawing.
1000
Dated this 7th day of December
G. J. CLARKSON,
Chartered Patent Agent, Stockton-on-Tees, and Hull,
Agent for the Applicants.