Improvements in Packing for the Stuffing-boxes of Steam-engine Cylinders and other Apparatus.
Year: 1889

page_text: Date of Application, 27th Nov., 1889
Complete Specification Left, 22nd Aug., 1890-Accepted, 18th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Packing for the Stuffing-boxes of Steam-engine
Cylinders and other Apparatus.
I, JAMES JACK GALLOWAY, of 43 Mair Street, Plantation, Glasgow, in the
County of Lanark, North Britain, Engineer, do hereby declare the nature of this
invention to be as follows, that is to say :-
My said invention has for its object the making of improved packing for the
stuffing boxes of steam-engine cylinders and other apparatus, and it relates more
particularly to packing of the kind described in my Patent Specification No. 1118
of 1888.
The packing for a stuffing box consists of a set of rings formed principally of
fibrous materials such as asbestos, hemp, flax, and the like, such rings being made
with the surfaces in which they are in contact with each other of counterpart conical
forms; so that when the packing is compressed by means of the stuffing-box gland
the rings have a wedging action on each other.
In carrying out my present invention in addition to using fine brass, copper or
other suitable wire to bind the fibres of the strands of fibrous materials, I also employ
very fine wire either in plaited or twisted strands or in one or more plies of woven
wire to principally form the rubbing surface of each packing ring; or 1 may use
thin sheet metal in a similar way. The fine wire strands or woven wire or the thin
sheet metal may be applied upon any other surfaces of the packing rings as well as on
the rubbing surface, and in a manner to enwrap the asbestos or other fibrous material
forming the body of the rings. In some cases strands of very fine or fibrous wire
may be employed to form the body of the packing rings the same being made up with
tallow, plumbago, or other suitable lubricant or lubricating compound. Each ring is
cut through in a stepped manner and so as to allow of its contracting on a rod as its
rubbing surface wears; and where great elasticity is desired I form an annular
cavity or hollow core in the body of each ring, or between any contiguous pair
of rings.
Dated this Thante inch Jaw of Nanamba 1000
EDMUND HUNT,
Applicant's Agent.
COMPLETE SPECIFICATION.
Improvements in Packing for the Stuffing-boxes of Steam-engine
Cylinders and other Apparatus.
I, JAMES JACK GALLOWAY, of 43 Mair Street. Plantation, Glasgow, in the
County of Lanark, North Britain, 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, that is to say
:-
My said invention has for its object the making of improved packing for the
stuffing boxes of steam-engine cylinders and other apparatus and it relates more
particularly to packing of the kind described in my Patent Specification No. 1118
of 1888.
The packing for a stuffing box consists of a set of pairs of inner and outer rings
formed principally of fibrous materials such as asbestos, hemp, flax, and the like, such
rings being made with the surfaces in which those of each pair are in contact with
each other of counterpart conical forms; so that when the packing is compressed by
means of the stuffing-box gland the rings ha e a wedging action on each other.
And in order that my present invention and the manner of performing the same
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page_text: may be properly understood I hereunto append a sheet of explanatory drawings to be
hereinafter referred to in explaining my improvements.
Figure, 1, of the drawings is a transverse section of a pair of the rings, and
Figures, 2, 3, and 4, are transverse sections of single rings as made according to
different modifications. In these drawings the saine reference letters are used to
mark the same or like parts wherever they are repeated.
In addition to using fine brass, copper, or other suitable wire as described in my
earlier Patent Specification herein before referred to, to bind the fibres of the strands
of fibrous materials, also employ very fine wire either in plaited or twisted strands,
to principally form the rubbing surface of each inner packing ring, as shown in
Figure, i, the inner ring, A, having its inner rubbing surface composed of a thickness, B,
of twisted or plaited strands of very fine wire, which part, B, is attached to the
outer part,, of asbestos or other fibrous materials by being sewn thereto with wire.
Or instead of a thickness, B, of twisted or plaited wire I may employ one or more
plies of woven wire, or I may use sheet metal, D, as shown in Figure, 2, to form the
rubbing surface.
The fine wire strands or woven wire or the sheet metal may be applied upon any
other surfaces of the packing rings as well as on the rubbing surface. Thus the
outer ring, E, Figure, 1, is shown as having applied to it thin sheet metal in a manner
to enwrap the asbestos or other fibrous materials forming the body of the ring.
Instead of the rubbing surface of the inner ring, A, having continuous sheet metal
applied to it as shown in Figure, 2, such rubbing surface may be formed to a greater
or less extent by separate pieces, G, of metal of rectangular or other simple form as
shown in Figure, 3, such pieces being embedded in the asbestos or other fibrous
materials and being held by points formed on their backs and entered into the
materials.
"
In some cases strands of very fine or fibrous wire may be employed to form the
body of the packing ring, the same being made up with tallow, plumbago, or other
suitable lubricating compound; and when the body of a ring is made in this way I
render it elastic or compressible by forming through it an annular cavity or hollow
core, H, as shown in Figure, 4.
Each ring, A, E, is cut through in a stepped manner as described in my earlier
Specification hereinbefore referred to, to allow of its contracting on a rod as its
rubbing surface wears; and when sheet metal is applied to the conical surface of a
ring such sheet metal is divided radially as shown in Figure, 4. The stepped cut
through each ring and the divided sheet metal allow of a ring being opened
sufficiently to be got upon a rod without having to be passed over the end of
the rod.
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-In stuffing-box packing rings of the kind to which the invention relates, and
having asbestos or other fibrous materials to form the body, applying for the rubbing
surface a thickness of very fine wire in plaited or twisted strands, or one or more plies
of woven wire, substantially as herein before described.
2-Applying sheet metal for the rubbing surfaces of stuffing-box packing rings of
the kind to which the invention relates substantially as hereinbefore described.
3 Applying separate small pieces of metal for the rubbing surfaces of stuffing-box
packing rings of the kind to which the invention relates substantially as hereinbefore
described with reference to Figure, 3, of the accompanying drawings.
4-Making the body of a stuffing-box packing ring of very fine wire and with an
annular cavity or hollow core substantially as hereinbefore described.
Dated this Twenty-first day of August 1890.
EDMUND HUNT,
Applicant's Agent.