Improvements in Packing for Piston and similar Reciprocating Rods.
Year: 1893

page_text: Date of Application, 4th Mar., 1893
Complete Specification Left, 2nd Dec., 1893-Accepted, 13th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements in Packing for Piston and similar Reciprocating
Rods.
We, GILBERT CROCKET HARKNESS 9 Meldon Terrace, Heaton, Newcastle-on-
Tyne, Northumberland, Marine Engineer, and ALBERT EDWARD SMITHSON
186 Castle Road, Cardiff, South Wales, Marine Engineer, do hereby declare the
nature of this invention to be as follows :-
This our invention has reference to improvements in packing which is chiefly
intended for use in the stuffing boxes of steam engine cylinders, and the cylinders
of other motors for preventing the escape of steam or other fluid from such
cylinders, also for reducing friction, the piston rods of such cylinders having a
reciprocating motion transmitted to them, and the object of our said invention is to
make an efficient and durable packing for that purpose.
To carry our said invention into practice we first place in the stuffing box of
such cylinders a continuous solid ring of white or other anti-friction metal of any
suitable shape and size upon or against which we superimpose one or more con-
tinuous rings of white or other anti-friction metal of any suitable size and channel
or U shaped in cross-section, in the channel or trough of which rings we place
gasket or other suitably lubricated core packing, the gland of the stuffing box
being then placed in position and screwed down on the packing when required by
bolts and nuts or other suitable means.
The said anti-friction metal rings we cast or form in a suitable mould or moulds
of any convenient size, either as continuous rings, or in any suitable number of
segments.
Dated this 2nd day of March 1902
JOHN NEWTON,
Longport, Staffordshire, Agent for Applicants.
COMPLETE SPECIFICATION.
Improvements in Packing for Piston and similar Reciprocating
Rods.
We,
GILBERT CROCKET HARKNESS, 9 Meldon Terrace, Heaton, Newcastle-on-.
Tyne, Northumberland, Marine Engineer, and ALBERT EDWARD SMITHSON
186 Castle Road, Cardiff, Glamorgan, South Wales, 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 our invention has reference to an improved packing or packings, and is
chiefly intended for use in the stuffing boxes of steam engine cylinders, and the
stuffing boxes of the cylinders of other motors for preventing the escape of steam
or other fluid from such cylinders, and to reduce the friction caused by the sliding
or reciprocating rods of such motors. The object of our said invention being to
make efficient and durable packing for the purpose named.
In carrying our said invention into practice we first place around the piston rod
or rods projecting through the stuffing box or boxes of such cylinders a solid ring
or segments of a ring of any suitable shape, and size in cross-section, and made
of or from white metal, or other suitable anti-friction metal or alloy, against which
Pi Q71

page_text: solid ring, and one against another we place one or more rings or segments of a
ring or rings of antifriction metal or alloy of suitable channelled or U shape in
transverse section, in the channel or trough of each of which rings we place gasket,
cored hemp, soapstone packing or the like with or without lubricant.
After a proper number of rings or segments of such channelled or sulcated rings
have been packed in such stuffing box or boxes around the reciprocating rod or
rods of such motors, the gland of such stuffing box is placed in its proper position
and screwed up or forced against the packing when requisite by bolts and nuts or
other suitable means.
In order that our said invention may be more readily understood and explained
in detail we have hereunto annexed a sheet of drawings on which letters of reference
are marked on corresponding parts on all the figures alike.
DESCRIPTION OF DRAWINGS.
Figure 1 represents a sectional view of the stuffing box of a steam cylinder,
shewing the mode of arranging our improved packing or packings within such
boxes.
Figure 2 is a plan view of one of the channelled or sulcated metallic rings.
Figure 3 is an enlarged sectional elevation through the line x-x on Figure 2.
Figure 4 is a sectional elevation of a modification of Figure 3, and
Figure 5 is a plan view of a channelled or sulcated metallic ring, divided into
three parts or segments.
The above figures are not drawn to any particular scale, but are given to illustrate
our said invention, and the method of using same.
Referring to Figure 1, a represents the stuffing box of a steam engine cylinder,
through which stuffing box a piston rod b is reciprocated by steam.
When packing such stuffing boxes we first place therein at the bottom of such
box, and around the rod b, a solid ring or segments c of a ring, made of or from
suitable anti-friction metal or alloy, against such ring c and contiguous to each
other we have shewn six rings, or segments d of rings channelled or sulcated, in the
channelled portion d2 of each of the said rings d we place a suitable lubricating
packing e, the bush fand gland g are then placed or slid into their proper positions
as shewn, and may be screwed or forced against such packing when requisite by
bolts and nuts or other suitable means. The said rings or segments of rings we
make by stamping or casting in suitable dies or moulds, and the alloy we have
found most suitable for such rings or segments of rings is composed of 91 parts of
tin, 8 parts of antimony and one part of copper; but we do not confine ourselves to
the use of such alloy, as any other suitable anti-friction metal or alloy, and packing
may be used in a similar manner and shape.
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 ;-
1. The construction, and application to the stuffing boxes of steam engines and
other motors having reciprocating or sliding rods, of packing consisting of one
solid ring, and one or more U shaped or channelled rings or the modification shewn
at Figure 4, the said rings being made of any suitable size, and of or from any
suitable anti-friction metal or alloy, the channel or trough of each ring being filled
or packed with soapstone packing, gasket, hemp or hemp having an india-rubber or
other core, which packing before insertion may be well smeared or coated with any
suitable lubricant, and arranged in the manner and for the purpose as herein
substantially described, set forth and fully illustrated on the drawings hereunto
annexed.
2. The construction, and application to the stuffing boxes of steam engines and
other motors having reciprocating or sliding rods, of packing consisting of one
solid ring in halves or segments, and one or more U shaped or channelled rings or

page_text: the modification shewn at Figure 4 in halves or segments, the said rings being
made of any suitable size, and of or from any suitable anti-friction metal or alloy,
the channel or trough of each ring being filled or packed with soapstone packing,
gasket, hemp or hemp having an india-rubber or other core, which packing before
insertion may be well smeared or coated with any suitable lubricant, and arranged
in the manner and for the purpose as herein substantially described set forth and
fully illustrated on the drawings hereunto annexed.
Dated this 1st day of December 1893.
JOHN NEWTON,
Longport, Staffordshire, Agent for Applicants.