IMPROVED METALLIC PISTON PACKING
Year: 1884

page_text: I RICHARD YOUNG, of 51 Prince Regent Street, and 9 Commercial Street, Leith,
in the County of Edinburgh, N.B. Engineer, do hereby declare the nature of my
invention for IMPROVED METALLIC PISTON PACKING, to be as follows:-
This Piston Packing, consists of two Metallic Packing rings with flanges on
outer edges, cut through transversely, so that they can expand circumferentially,
and also transversely between the piston flange and Junk ring, these rings are
pressed out transversely by a number of spiral or bow springs, bearing on inside of
langes, and acting against incline planes, formed on Piston flange, Junk ring, and
packing rings, the angle regulated, so that a much greater pressure can be thrown
on the piston flange and Junk ring, than on the Cylinder, thus preventing steam
passing into the space between piston and packing rings, without putting too much
pressure against the sides of Cylinder, and causing unnecessary friction.
Fig 1. Part section of Piston, showing packing rings, and spiral springs, A. A. the
two packing rings, B. the spiral springs, a number of which are placed at
regular distances round the piston, resting in sockets C. formed on the
Packing rings.
Fig 2. Similar arrangement of Packing rings, with the exception, that the Spiral
Springs are held in position by malleable iron rings E E. passing round
`piston body.
Fig 3. Similar arrangement of Packing rings, but using laminated or bow
springs F. F., instead of spiral springs.
Fig 4. The Packing rings have bearing on Piston flange and Junk ring, Bat, the
incline planes being formed on inner rings H. H. and acting partly on incline
plane formed on piston flange, Junk ring, and packing rings.
-Dated this Fifteenth day of March Eighteen hundred and eightyfour.

page_text: I RICHARD YOUNG, of 51 Prince Regent Street, Leith, in the County of
Edinburgh, N.B. Engineer, do hereby declare the nature of my invention for
IMPROVED METALLIC PISTON PACKING, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
My said Invention which relates to Improved Metallic piston packing, consists
of an arrangement of piston with incline planes formed on piston flange and junk
ring, with corresponding inclines on packing rings.
And in order that my said Invention may be clearly understood, I now proceed
more particularly to set forth the system, mode, or manner, in or under which the
same is or may be practically carried into effect, reference being had to the
accompanying Drawings, and to the letters and figures marked thereon.
Figure 1. Plan of Piston, one half with junk ring removed.
Figure 2. Side elevation of Piston, one half in section..
Figure 3, Plan of circular wave springs.
In carrying my Invention into practice, I use a piston of the ordinary type, fitted
with a Junk ring, This packing consists of two metallic packing rings E. E' with
flanges on the outer edges, cut through transversely, so that they can expand
outwards against the cylinder walls, and also transversely between the piston
flange B. and Junk ring C. these rings are pressed out transversely by a number of
spiral, or bow springs, or by the circular wave spring or springs, F. F¹ (kept apart
by adjusting blocks H), and bearing against inside of packing ring flanges, and
acting against incline planes K. formed on the piston flange B, and Junk ring C,
with corresponding inclines on packing rings E. E'. The inclines being so arranged,
that a much greater pressure can be thrown on piston flange B, and Junk ring.C,.
than on the cylinder walls, thus preventing any unnecessary friction, but never-
theless expanding the packing rings E. E' sufficient, to maintain them always in
steam tight contact with the cylinder sides.
By the described arrangement, the advantages gained, are simplicity of con-
struction, the great ease with which the several parts may be removed, examined,
adjusted, and replaced. This packing has also the advantage of keeping the.
piston working always in the true centre of the Cylinder thus maintaining the true
circular form of both cylinder and piston.
Having now, particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is,
First, The forming of incline. planes on the piston flange and Junk ring, with
corresponding inclines on Packing rings, substantially as and for the purposes
herein before described, with reference to the accompanying Drawings.
Second, The improved Construction of Springs and adjusting blocks, substantially
as and for the purposes hereinbefore described and represented in the accompanying
Drawings.
Dated this 3rd day of December 1884