Year: 1887

page_text: Date of Application, 21st Feb., 1887.
Complete Left, 23rd May, 1887.
Complete Accepted, 28th June, 1887.
I, JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex,
Gentleman do hereby declare the nature of this Invention to be as follows:-
This Invention relates to an improved packing material which is more especially
applicable as packing for piston rod stuffing boxes but is also applicable as packing
for valves, joints or the like. This packing preferably is made of thin strips of soft
or pliable metal or alloy being preferably the white metal composed of twenty parts
of tin to eighty parts of lead but any other suitable alloy or metal may be employed.
This metal is rolled out into thin sheets which are cut up into strips of a width
corresponding to the size of the packing to be produced. These strips are then folded
longitudinally and flatwise upon a narrow strip of fabric or material such as wool,
cotton, thread, silk rubber, caoutchouc or the like and the several thicknesses
produced by this operation are then stitched or sewn together. This riband is then
creased or folded transversally on itself so as to form a perfectly regular zig zag the
folds being afterwards pressed together and forced into a tight sheath or case of cotton
or woven or other flexible material. The whole is then strongly stitched or sewn
together in such a manner that the flexible rectangular rope of packing thus obtained
can be cut or divided into short lengths without risk of the metal filling escaping from
the sheath or case.

page_text: In applying the packing material thus prepared to a piston rod for example a
piece of packing is selected a trifle (say about one tenth) thicker than the width of
the space to be filled in the stuffing box and being wrapped round the rod is cut into
lengths so that each length forms a ring encircling the piston without any interval
between the ends. These rings being placed in a suitable stuffing box form an
excellent packing for piston rods and the like and it is evident that the material
prepared as heroinbefore described may be used with advantage in packing valves
joints and other like purposes by modifying the form and dimensions according to
the purpose to which it is to be applied.
1007

page_text: Improvements in Packing Material for Piston Rod Stuffing Boxes
and other like Purposes.
I JAMES YATE JOHNSON of 47 Lincolns Inn Fields in the County of Middlesex
Gentleman do hereby declare the nature of this Invention which has been communi-
cated to me from abroad by Joseph Marie Guibal of 48 rue de Bondy Paris in the
Republic of France Engineer 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 an improved packing material which is more especially
applicable as packing for piston rod stuffing boxes but is also applicable as packing
for valves joints or the like. This packing is extremely durable being principally
made of thin strips of soft or pliable metal or alloy preferably a white metal composed
of twenty parts of tin applied on eighty parts of lead without fusion but any other
suitable alloy or metal may be employed. This metal is rolled out into thin sheets
which are cut up into strips of a width corresponding to the size of the packing to be
produced. These strips are then folded longitudinally and flatwise upon themselves
a narrow strip of fabric or material such as wool cotton thread silk rubber caoutchouc
or the like thickly coated with grease being interposed between the folds as shewn in
figure 2 or as in figure 3 of the annexed drawing and the several thicknesses produced
by this operation are then stitched or sewn together throughout the whole width so as
to form a continuous metallic riband-This metallic riband is then creased or folded
transversely on itself so as to form a perfectly regular zig-zag as shewn in figure 4 or
as in figure 5. the folds being afterwards mechanically pressed together and forced into
a tight sheath or case of cotton thread or fabric. A piece of packing material of
square or rectangular section is thus obtained being flexible in all directions and of
any desired thickness or length. This packing is then strongly stitched or sewn to
the sheath by longitudinal stitches or seams crossing one another in such a manner
that the flexible rectangular rope of packing thus obtained can be cut or divided into
short lengths without risk of the metallic filling escaping from the cotton sheath or
case. The seams may be made with cotton wool or silk thread or wire or other
suitable material and the lengths of packing may be made of about half an inch or
other suitable thickness and in lengths of say about four or six yards for example.
In applying the packing material thus prepared to a piston rod for example a piece
of packing is selected a trifle (say about one tenth) thicker than the width of the
space to be filled in the stuffing box, and being wrapped round the rod so as to
increase its diameter is divided transversely at intervals so that each length or section
encircling the piston forms a practically continuous ring without any interval
between the abutting extremities. These rings being placed in a suitable stuffing box
form an excellent packing for piston rods and the like and it is evident that the
material prepared as hereinbefore described may be used with advantage in packing
valves joints and other like purposes by modifying the form and dimensions according

page_text: to the purpose to which it is to be applied. The rings on the piston as hereinbefore
described may be made in several pieces of the same thickness so as to utilize all the
ends and avoid waste of the material.
Figure 1 sheet 1 of the annexed drawings illustrates the application of the improved
packing material to a piston rod stuffing box with a conical base terminating in a
small inward shoulder. The superposed rings forming the packing are clearly shewn
at a a.
When the packing wears away it is simply necessary to add another ring at the
top and screw down the gland or cover of the stuffing box thereon. It being never
necessary to take out this improved packing and renew it entirely it is described by
my foreign correspondent as an everlasting" packing.
"
It is preferable to make the shoulder A in the bottom of the stuffing box of inclined
form as indicated in figure 1 an angle of 30 degrees being very suitable for this
purpose.
Having now particularly described and ascertained the nature of the said Invention
and in what manner the same is to be performed I declare that what I claim is :-
The improved packing material for piston rod stuffing boxes and other like
purposes consisting of a combination of metallic and fibrous or other flexible materials
manufactured substantially as hereinbefore described.