Improvements in Packing Semi-metallic for Stuffing Boxes of Steam Engines and other Mechanical Appliances.
Year: 1889

page_text: Date of Application, 22nd Oct., 1889
Complete Specification Left, 11th July, 1890-Accepted, 16th Aug., 1890
PROVISIONAL SPECIFICATION.
Improvements in Packing Semi-metallic for Stuffing Boxes of Steam
Engines and other Mechanical Appliances.
JAMES BURAL, Marine Engineer, 43 Fitzhamon Embankment, Cardiff, in the
County of Glamorgan, do hereby declare the nature of this invention to be as
follows:-
My invention relates to the manufactures of that class of packing for stuffing boxes,
semimetallic. A packing composed of several materials, one of which is of metal.
It is to resist a very high degree of heat; and a high degree of pressure with a
small amount of friction. It is composed of different materials, one of a fibrous
nature such as asbestos, cotton waste, cotton hemp, flax or jute, either separate or
two or more combined. A lubricating and binding material, such as blacklead,
soapstone or tale. The other of metal in the form of cut rings in either angular
wedge round or half round form. The metal rings are cut into segments of any
number and are so cut at their ends that they can close to the rod as they are worn
away. These metal segments are placed between rings or half rings of the fibrous and
lubricating material so that by the lateral compression of the fibrous material they
will be forced against the rod. The fibrous material such as asbestos and cotton
waste is well mixed with the lubricating and binding material such as blacklead
soapstone and tale-it is then either felted together or spun into yarn of suitable size,
or several yarns can be twisted or plaited together to give the required size-it is
then wetted, placed on each side of the metal segments in suitable moulds and pressed
so as to give the required shape, it is then dried and soaked in oil to enable it to
resist the action of steam, water or other liquids or gasses.
The object of my Invention is to produce a much more durable and efficient
packing than is at present known-by uniting together the fibrous materials, the
lubricating or binding material with the metal segments placed in the mixed material,
so as to form a packing that will resist a very high degree of pressure with a small
amount of friction.
717
Cen
COMPLETE SPECIFICATION.
Improvements in Packing Semi-metallic for Stuffing Boxes of Steam
Engines and other Mechanical Appliances.
JAMES BURAL Collington Road West Bute Dock Cardiff County of Glamorgan
Marine Engineer do hereby declare the nature of this invention and in what
manner the same is to be perforined, to be particularly described and ascertained
in and by the following statement :-
My invention relates to the manufacture of that class of packing for stuffing boxes,
semimetallic. A packing composed of several materials, one of which is of metal ;
it is to resist a very high degree of heat, and a high degree of pressure with a small
amount of friction. It is composed of different materials, one of a fibrous nature,
such as asbestos, cotton waste, cotton hemp, flax or jute, either separate or two or
more combined. A lubricating and binding material such as black-lead, soapstone or
tale: the other of metal in the form of cut-rings in either angular, wedge, round
or half round form. The metal rings are cut into segments of any number, and are
so cut at their ends, that they can close to the rod as they are worn away. These
metal segments are placed between rings or half rings of the fibrous and lubricating
material, so that by the lateral compression of the fibrous material they will be forced

page_text: against the rod. The fibrous material such as asbestos and cotton waste is well mixed
with the lubricating and binding material such as blacklead, soapstone and tale; it
is then either felted together or spun into yarn of suitable size or several yarns can
be twisted or plaited together to give the required size, it is then wetted, placed on
each side of the metal segments in suitable moulds and pressed so as to give the
required shape, it is then dried and soaked in oil so as to enable it to resist the
action of steam, water or other liquids or gases.
The object of my Invention is to produce a much more durable and efficient
packing than is at present known, by uniting together the fibrous material, the
lubricating or binding material with the metal segments placed in the mixed materials,
so as to form a packing that will resist a very high degree of pressure with a small
amount of friction.
Drawing No. 1 shews a half ring of the packing with the metal segments.
All the same parts in all the drawings are lettered the same.
Fig. No. 1. B is the metal segment of a wedge or angular shape form- is the
fibrous and binding or lubricating material.
Fig. No. 2. shews a half ring of the packing with the metal segments B of a
half round form-U is the fibrous material.
Fig. No. is a half ring of the packing having the metal segments B of a round
form U is the fibrous material.
Fig. No. 4 shews the metal segments B in a ring of the fibrous material-U shews
how their ends are cut so that they can close to the rod as they are worn.
Fig. No. 5 is a view of the ring of packing shewing how the joints in the packing
are made, the fibrous material U, and the metal segments B overlapping each other
at the joints, so that no two joints can come together.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
First (1st) The mixing together of asbestos and cotton waste with blacklead and
soapstone, either felted together or spun into yarn and on each side of the metal
segments of rings for a packing, substantially as and for the purpose berein
described.
Second (2nd) The metal rings cut into segments, and their ends so cut as to allow
them to close to the rod, the segments in either form, angular, wedge shape, round
or half round, placed between the fibrons and Linding materials, asbestos, cotton-waste,
blacklead, soapstone, substantially as and for the purpose herein described.
Third (3rd) The wetting of the fibrous and binding or lubricating material after
being mixed together and placing the metal segments in their midst, pressing the
same in suitable moulds to form it into cut or half rings, drying and soaking in oil,
substantially as for the purpose herein described.
Fourth (4th) The cutting of the metal segments at their ends so as to allow them
to close to the rod as they are worn. These segments can be of any shape and of
any number to form a ring and placed between rings or half rings of a fibrous and
binding or lubricating material, substantially as for the purpose herein described.
Fifth (5th) The placeing of the metal segments between rings or half rings of
any of the fibrous or lubricating and binding materials as described for use as a
packing, substantially as for the purpose herein described.
Dated this 11th day of July 1890.