IMPROVEMENTS IN PACKING FOR THE JOINTS OF STEAM ENGINES AND OTHER PURPOSES
Year: 1871

page_text: LETTERS PATENT to Egmont Feldtmann, of 16, Mark Lane, in the
City of London, Merchant, for the Invention of "IMPROVEMENTS IN
PACKING FOR THE JOINTS OF STEAM ENGINES AND OTHER PURPOSES."-A
communication from abroad by C. Otto Gehrckens, of the City of
Hamburg, in the German Empire. Manufacturer.
Sealed the 16th May 1871, and dated the 15th March 1871.
PROVISIONAL SPECIFICATION left by the said Egmont Feldtmann at
T
the Office of the Commissioners of Patents, with his Petition, on the
15th March 1871.
I, EGMONT FELDTMANN, of 16, Mark Lane, in the City of London,
Merchant, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN PACKING FOR THE JOINTS OF STEAM ENGINES AND OTHER
PURPOSES," a communication to me from abroad by C. Otto Gehrckens,
of the City of Hamburg, in the German Empire, Manufacturer, to be
as follows:-
:-
This Invention relates to a peculiar packing which is more particularly
adapted to steam joints and stuffing boxes, but may be employed as
packing for other purposes.

page_text: This improved packing consists of a tube casing or envelope composed
of knitted cotton, yarn, or other fibrous material, and lined with one or
more layers of cotton wick, a central internal space being left, which
space is to be filled in solidly with talc, soapstone, or other like suitable
unctuous or lubricating material or compound, in bulk capable of
resisting the action of heat, such material or compound being either in
a dry pulverised state, or in the condition of a more or less moist or
pasty mass when introduced inside the casing. This packing, when
used in a stuffing box, is to be coiled round the piston or other rod, each
layer being firmly pushed or rammed down into the interior of the
stuffing box. When applied between flat junction surfaces, such, for
example, as the flanges of cylinders and their covers, or the junction
surfaces of man-hole lids or covers, it is coiled in a volute form between
such surfaces, or it may be otherwise applied as circumstances may
require.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Egmont Feldtmann in the Great Seal Patent Office
on the 15th September 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EGMONT
FELDTMANN, of 16, Mark Lane, in the City of London, Merchant, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifteenth day of March, in the year
of our Lord One thousand eight hundred and seventy-one, in the
34th year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Egmont Feldtmann, Her special
license that I, the said Egmont Feldtmann, my executors, adminis-
trators, and assigns, or such others as I, the said Egmont Feldtmann,
my executors, administrators, or assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during the
term therein expressed, should and lawfully might make, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN PACKING FOR THE JOINTS OF STEAM ENGINES AND OTHER PURPOSES," a com-
munication to me from abroad by C. Otto Gehrckens, of the City of
Hamburg, in the German Empire, Manufacturer, upon the condition

page_text: (amongst others) that 1, the said. Egmont Feldtmann, my executors or
administrators, by an instrument in writing under my hand and seal,
should particularly describe and ascertain the nature of the said In-
vention, and in what manner the same was to be performed, and cause
the same to be filed in the Great Seal Patent Office within six calendar
monthis next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Egmont Feldtmann, do hereby
declare the nature of my said. Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the accompanying
Drawing, and to the letters and figures marked thereon, that is to
say:
The said Invention relates to a peculiar packing which is morc
particularly adapted to steam joints and stuffing boxes, but may be
employed as packing for other purposes.
This improved packing consists of a tube casing or envelope composed
of knitted or woven cotton, yarn, or other fibrous material, and lined
with one or more layers of cotton wick, or two or more such tubes
placed within one another inside each tube or tubes, a central internal
space being left, which space is to be filled in solidly with talc,
soapstone, or other like suitable unctuous or lubricating material or
compound, in bulk so as to form a solid core capable of resisting the
action of heat, such material or compound being either in a dry pul-
verized state, or in the condition of a more or less moist or pasty mass
when introduced inside the casing. This packing, when used in a
stuffing box, is to be coiled round the piston or other rod, each layer
being firmly pushed or rammed down into the interior of the stuffing
box. When applied between flat junction surfaces, such, for example,
as the flanges of cylinders and their covers, or the junction surfaces of
man-hole lids or covers, it is coiled in a volute form between such
surfaces, or it may be otherwise applied as circumstances may require.
Figure 1 of the annexed Sheet of explanatory Drawings represents a
transverse section, and Figure 2 a longitudinal section, of the improved
packing composed of a single outer casing or tubular envelope a of
knitted or woven cotton, having an inner lining composed of one or more
layers of cotton wick so disposed as to leave a central space for the
reception of the talc or other lubricating material c; Figures 3 and 4
are similar views of a packing composed of an outer tube and an inner

page_text: one a¹, with a layer or layers of cotton wick disposed between the
two tubes, and another layer of cotton wicks 6' inside the inner tube,
the talc or equivalent material'c being introduced into the centre so as
to form a solid core.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used or
carried into effect, I would observe in conclusion that I am aware that
lubricating material in a fine state of division has been incorporated or
worked into fibrous substances, and used as a packing in the form of a
gasket or rope, and therefore I lay no claim to such a combination of
substances, nor to the mode of applying the same as a packing; but
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, the construction and use of packing composed of one or more
knitted or woven tubes or envelopes lined with one or more layers of
fibrous material in the form of cotton wicks, and having the remaining
central or tubular space filled in with talc, soapstone, or other like
unctuous or lubricating material or compound, in bulk so as to form a
central core either in a dry or moist condition, as and for the purpose
herein-before described.
In witness whereof, I, the said Egmont Feldtmann, have to this
my Specification set my hand and seal, the Fourteenth day of