IMPROVEMENTS IN THE MANUFACTURE OF PACKING FOR STEAM, HYDRAULIC, AND OTHER PURPOSES."
Year: 1880

page_text: LETTERS PATENT to Joseph Briggs, of Sunderland, in the County of Durham,
for an Invention of "IMPROVEMENTS IN THE MANUFACTURE OF PACKING FOR
STEAM, HYDRAULIC, AND OTHER PURPOSES."
PROVISIONAL SPECIFICATION left by the said Joseph Briggs at the Office
of the Commissioners of Patents on the 12th October 1880.
JOSEPH BRIGGS, of Sunderland, in the County of Durham. "IMPROVEMENTS
IN THE MANUFACTURE OF PACKING FOR STEAM, HYDRAULIC, AND OTHER
PURPOSES."
My packing is constructed of an inner hollow core of india rubber or other
elastic or springy substance; this is covered with linen, canvas, or other such
suitable material formed in strips and wrapped upon the core; the strips are
interspersed with fine wire gauze for strengthening purposes. The whole is made
self lubricating by being steeped in a composition consisting of tallow, fine soap,
and beeswax, or other suitable lubricating material; it is intended to manufacture
the packing in coils, rings, and suitable lengths for marine and other engines,
pumps, pipes, and taps.
The packing being tubular the least pressure ensures its being tight, at the same
time it is almost frictionless.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Briggs in the Great Seal Patent Office on the 12th April
1881.
$6
JOSEPH BRIGGS, of Sunderland, in the County of Durham. IMPROVEMENTS
IN THE MANUFACTURE OF PACKING FOR STEAM, HYDRAULIC, AND OTHER
PURPOSES."
My improved packing is constructed of an inner hollow core of indiarubber or
other elastic substance; this is covered with linen, canvas, or other such suitable
Pris 1

page_text: pipes, taps, valves, and the like.
The packing being tubular the least pressure insures its being steam or water
tight, and at the same time it is almost frictionless.
Such being the nature and object of this my said Invention, in order that the
same may be fully understood I have hereunto attached a Sheet of Drawings
illustrative thereof, and have marked the same with Figures and letters of
reference.
DESCRIPTION OF DRAWINGS.
Fig. 1 is an elevation in section shewing my improved packing in cylinder
gland.
Fig. 2 shews a plan view of packing encircling the piston rod.
Figs. 3 and 4 shew section and elevation of packing on a large scale.
Figs. 5 and 6 shew clevation and section of a ring of packing.
Fig. 7 shews a section of my tubular packing for press ovens.
A, A, are the hollow or tubular indiarubber or elastic rings or tubes upon which
the canvas B, B, is wound (preferably in strips), it being interspersed with wire or
brass gauze C, C, for the purpose of adding strength to it (it also removes all
flutings and keeps the piston rod bright); the tubular indiarubber core giving it a
springy nature, the least pressure insures its being steam or water tight. The whole
of the packing is steeped in a composition consisting by preference of tallow 3 parts,
I make a slight
fine soap 2 parts, and bees-wax one part, and is almost frictionless.
difference in the composition of the hydraulic packing, namely, instead of bees-wax
being used the same weight of fine powdered black lead is used.
Having thus described and particularly ascertained the nature of my said
Invention, and the manner in which the same may be performed or carried into
effect, I would have it understood that what I claim as the Invention to be secured
to me by the hereinbefore in part recited Letters Patent is,—
Tubular packing constructed and arranged in the manner herein described and
illustrated in the Drawings hereunto annexed.
In witness whereof, I, the said Joseph Briggs, have hereunto set my hand
and seal, this Twenty eighth day of March, in the year of our Lord One
thousand eight hundred and eighty one.
Witnesses,
WILLIAM BORROWDALE.
JOHN E. WALSH,
Patent Agent and Consulting Engineer,
Crossley Street, Halifax,
and 30, East Parade, Leeds.
JOSEPH BRIGGS. (L.s.)