A NEW OR IM- PROVED LUBRICATING PACKING FOR STUFFING BOXES AND OTHER LIKE PURPOSES
Year: 1876

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields, in the
County of Middlesex, Gentleman, for the Invention of "A NEW OR IM-
PROVED LUBRICATING PACKING FOR STUFFING BOXES AND OTHER LIKE
PURPOSES." A communication from abroad by Louis Wertheim, of Bornheim,
near Frankfort-on-the-Main in the Empire of Germany.
ealed the 12th April 1876, and dated the 7th February 1876.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson at the
Office of the Commissioners of Patents on the 7th February 1876.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "A NEW OR IMPROVED LUBRICATING PACKING FOR STUFFING BOXES
AND OTHER LIKE PURPOSES." A communication from abroad by Louis Wertheim,
of Bornheim,.
,.near Frankfort-on-the-Main, in the Empire of Germany.
This Invention relates to self-lubricating packing produced from fibres or filaments
which are filled with tale or other similar substances, and which may be also im-
pregnated or not with mineral, animal, or vegetable oil or fat.
The packing consists of a rope, the outer covering or exterior jacket of which is
formed by a woven or knitted tube of cotton or other similar textile material, which i
encloses a lining or layer of loosely intertwined cotton, thread, or other fibres or
filaments having their interstices filled or impregnated with talc, graphite, or other
suitable lubricating mineral substance. Within this lining there is arranged a layer
of talc or other similar material enclosing a centre or core composed of threads or
fibres, and which is covered with powdered talc or other substances, resisting heat
and diminishing friction. Cotton, hemp, jute, or other fibrous substances, or gummy
fibres may be employed for the centre or core.
The threads or fibres for the lining should be spun or twisted loosely so as to be
capable of receiving as large a quantity of tale or its equivalent as possible.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Henry Johnson in the Great Seal Patent Office on the 4th
August 1870.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "A NEW OR IMPROVED LUBRICATING PACKING FOR STUFFING BOXES
AND OTHER LIKE PURPOSES." A communication to me from abroad by Louis
Wertheim, of Bornheim, near Frankfort-on-the-Main, in the Empire of Germany.
The said Invention relates to what is known as self-lubricating packing produced
from fibres or filaments which are filled with talc or other similar substances, and
which may be also impregnated or not with mineral, animal, or vegetable oil or fat,
and it consists of a new or improved construction or composition of such packing
whereby greater advantages are obtained than by the ordinary methods.
And in order that the said Invention may be fully understood I shall now pro-
ceed more particularly to describe the same, and for that purpose shall refer to the
several Figures on the annexed Sheet of Drawings, the same letters of reference
indicating corresponding parts in both the Figures.
Figure 1 of the accompanying Drawings represents a longitudinal section of a
portion of a rope constituting the packing, and Figure 2 is a transverse section of
the same.
The packing consists of a rope, the outer covering or exterior jacket of which is
formed by a woven or knitted tube A of cotton or other similar textile material
which encloses an inner covering or lining B of loosely intertwined cotton, thread,
or other fibres or filaments, having their interstices filled or impregnated with tale,
graphite, or other suitable lubricating mineral substance. Within the inner cover-
ing B there is arranged a layer C of talc or other similar material, enclosing a
centre or core D composed of threads or fibres, and which is covered with powderedl
tale or other substance, resisting heat and diminishing friction; cotton, hemp, jute,
or other fibrous substances, or gummy fibres may be employed for the centre or
core D.
The threads or fibres for the inner covering B are twisted loosely so as to be
capable of receiving as large a quantity of talc or its equivalent as possible. The
external jacket A may be made double or in three or more layers if desired.
Having now described and particularly ascertained the nature of the said Inven-
tion and the manner in which the same is or may be used or carried into effect, I
would observe in conclusion that what I consider to be novel and original, and
therefore claim as the Invention secured to me by the herein-before in part recited
Letters Patent is,―
First. The inner covering B contained within the external woven or knitted
jacket, and composed of loosely twisted or intertwined cotton, threads, or other
fibres or filaments having their interstices filled with talc, graphite, or other similar
lubricating substance, substantially as herein-before described.
Secondly. The centre or core D, composed of cotton, hemp, or jute, or gummy or
other fibres, and encased in a layer C of talc, graphite, or other similar lubricating
substance, substantially as herein-before described.
In witness whereof, I, the said John Henry Johnson, have to this my
Specification set my hand and seal, the Fourth day of August, One
thousand eight hundred and seventy-six.
J. HENRY JOHNSON. (L.S.)