Improved Packing for Piston-rod and other Glands. and flexableing be.
Year: 1897

page_text: PROVIDIUNAL DEECIFICATION.
Improved Packing for Piston-rod and other Glands.
WALTER JAMES GREENLAND, White Hart Hotel, Welsh Back, Bristol, do
hereby declare the nature of this invention to be as follows;-
Combination of metal rings and flexable packing-metal rings to be inserted
between each turn of packing.
I, WALTER JAMES GREENLAND, of the White Hart Hotel, Welsh Back, Bristol,
Marine 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 packing in glands for piston and other rods, such as
slide valve spindles and the like. It is applicable to the glands of stuffing-
boxes generally.
This invention consists in a combination, with rings or turns of flexible pack-
ing, such as are commonly employed, of rings of metal of a suitable kind, or of
other substance.
The rings are preferably made of metal, but they may be of vulcanite or of
compressed paper pulp known as “fibre.” Or they may be of other strong and
otherwise suitable substance.
Among the metals of which it is preferred the rings be made is gun-metal.
By the introduction of the said rings intervening between the rings or turns
of packing, the latter are prevented from becoming pressed into a more or less
united, consolidated and relatively unyielding mass such as is commonly pro-
duced. The rings or turns of packing are, under this invention, not so rapidly
rendered unfit for further use as heretofore, as the gland of the stuffing box does
not require to be so frequently tightened up.
The rings, which are placed between the rings or turns of packing, in accord-
ance with this invention, are preferably of wedge-shaped section, being thinnest
at the face which is next the rod which reciprocates or otherwise operates in the
gland.
a
Referring to the accompanying drawings, Fig. 1 represents in plan a ring
of the kind which it is preferred to employ alternately with flexible packing rings

page_text: or turns, in carrying this invention into practical effect. Fig. 2 represents a
section on the line x, x, Fig. 1.
The ring a, which is preferably of gun-metal, is of wedge-shaped section, being
thinnest at the inner face a¹. The outer face of the ring is bevelled at a³, as
shown.
At Fig. 3 is represented in section a stuffing-box 6 packed in accordance with
this invention. Between the rings or turns c of flexible packing, which is of the
usual hempen or other suitable kind, are interspersed in regular alternation the
rings a above described with reference to Figs 1 and 2. The gland d bears
upon the uppermost of the flexible packing rings c.
The pressure exerted through the gland, while acting also directly inwards on
The bevel a² at the
the packing as a whole, tends to force it towards the rod e.
outer face of the rings a has a tendency to force the outer faces of the rings or
turns e against the face of the stuffing-box b. Thus the stuffing-box and gland
are kept more effectually tight.
With this kind of packing, the flexible rings or turns c cannot become com-
pressed into a consolidated mass, the gland does not require to be tightened up
so frequently as heretofore, and the rings or turns c do not become so soon unfit
for further use and are not so liable to burning" by the friction of the rod
which the packing surrounds. Packing which has become "burnt"
by such
friction is liable to jam in the stuffing-box and thus made difficult to remove.
In cases where crossheads and other obstructions prevent the use of undivided
rings, the rings are made in sections and after the sections have been placed in
position they are bolted or otherwise secured together.
At Fig. 4 is shown in plan, and at Fig. 5 in side view, a ring thus made in
sections. The sections have shouldered joints a³ to which, after the sections have
been placed so as to embrace the rod which is to operate between them, the
screws are applied and connect the sections together.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
Packing for piston-rod and other glands, consisting of a combination of rings
such as a, of metal or other suitable substance, with rings or turns e of flexible
packing such as is ordinarily employed in glands; the former placed between
and alternating with the latter in regular succession, substantially as hercin-
above described with reference to the accompanying drawings.
100
T
1000
NICHOLAS WATTS,
Chartered Patent Agent, Bristol.