IMPROVEMENTS IN THE MANUFACTURE OF PACKING FOR STUFFING BOXES, GLANDS, AND THE LIKE
Year: 1882

page_text: LETTERS PATENT to John Brown, of Cannon Street, in the city of London,
Engineer, for an Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
PACKING FOR STUFFING BOXES, GLANDS, AND THE LIKE."
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PROVISIONAL SPECIFICATION left by the said John Brown at the Office
of the Commissioners of Patents on the 1st August 1882.
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JOHN BROWN of Cannon Street, in the city of London, Engineer "IMPROVE-
MENTS IN THE MANUFACTURE OF PACKING FOR STUFFING BOXES, GLANDS AND
THE LIKE".
"
This Invention relates to the manufacture of an improved packing for the
stuffing boxes or glands of steam and other engines.
In manufacturing my improved packing I make a core or centre of asbestos or.
other suitable fibrous yarn and seize or lap it with wire of antifriction metal and
over the said metallic seizing or lapping I plait asbestos or other suitable fibrous
yarn and alternately seize or lap and plait until the packing is made the required
size. Or I may seize or lap the said core or centre with asbestos or other
suitable yarn saturated or spread with white lead ground in oil and plait same
with yarn also saturated or spread with white lead ground in oil seizing or lapping
and plaiting alternately until the said packing is made the required size.
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page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Brown in the Great Seal Patent Office on the 1st February
1883.
JOHN BROWN of Cannon Street in the city of London, Engineer " IMPROVE-
MENTS IN THE MANUFACTURE OF PACKING FOR STUFFING BOXES, GLANDS, AND
THE LIKE."
This invention relates to the manufacture of an improved packing for the
stuffing boxes or glands of steam and other engines.
In manufacturing my improved packing I make a core of asbestos or other
suitable fibrous yarn and seize or lap it with wire of antifriction metal and over
the said metallic seizing or lapping I plait asbestos or other suitable fibrous yarn
and alternately seize or lap and plait until the packing is made the required size.
Or I may seize or lap the said core with asbestos or other suitable yarn saturated
or spread with white lead ground in oil and plait same with yarn also saturated or
spread with white lead ground in oil seizing or lapping and plaiting alternately
until the said packing is made the required size.
The packing before the last lapping or seizing may with advantage be forced
through a press or other machine for the purpose of forming a groove on one side
thereof, in which a suitable elastic material such as cork or india-rubber may be
placed, or the groove need not be filled in with elastic material.
In order to enable my invention to be better understood I will proceed to
describe the same by reference to the accompanying drawing in which figure 1, is
a cross section of packing manufactured according to my improvements; figure 2,
is a section taken through the line A, B, of figure 1, and figure 3, is a section
through the line C, D, of figure 1; figure 4, is a view of the packing as it appears
when finished; figure 5, is a cross section of a piece of packing before being
pressed to form the groove therein;. figure 6, is a similar view of the piece of packing
after the groove has been formed therein. Similar letters in all the figures
represent similar parts.
a, is the core of asbestos or other suitable fibrous material; b; is the wire of
antifriction metal with which the core a, of fibrous material is seized or lapped;
c, is the asbestos or other suitable fibrous yarn plaited over the anti-friction metal
seizing b; b, the next seizing or lapping of anti-friction metal wire.
The packing thus made will appear in cross section as shewn in figure 5; it is
then placed in a press or other suitable machine and a groove è, formed
longitudinally along it as shewn in figure 6, and into this groove e; I then place
cork, india-rubber or other suitable elastic material d, and complete the packing by
an outer seizing or lapping of asbestos or other suitable fibrous yarn c', whereby the
cork or india-rubber d, will be retained in position.
By grooving the packing as hereinbefore described the anti-friction seizing is
brought on one side as shewn and in making use of the packing this side is placed
so as to come into contact with the rod or moving part which is required to be
kept tight, whilst the side of the packing having the cork or other elastic
material d, inserted in the groove comes against the side of the stuffing box, and
gives the packing the elasticity required when the rods or working parts are out
of truth.
In the drawing I have shewn a packing manufactured with an alternate lapping
or seizing of asbestos or other fibrous yarn and wire of anti-friction metal.
When the packing is made with alternate seizings or lappings of yarn saturated
with white lead ground in oil, the process is substantially the same as that

page_text: hereinbefore described. It will also be understood that the packings may be made
without the cork or india-rubber filling d, in which case the groove is made after
the outer lapping of fibrous material c¹. For very high pressure purposes I prefer
to make the packing without any groove.
Having thus described my said invention and the best means with which I am
acquainted for carrying the same into effect I would have it understood that what
I claim is
The manufacture and use of the improved packings for stuffing boxes, glands
and the like as hereinbefore described and represented in the accompanying
drawing.
In Witness whereof I the said John Brown have hereto set my hand and
seal this first day of February one thousand eight hundred and eighty
three
JOHN BROWN (L.S.)