IMPROVE- MENTS IN THE MANUFACTURE OF PACKING FOR STUFFING BOXES, PISTONS, AND BEARINGS
Year: 1868

page_text: LETTERS PATENT to Sidengham Duer, of Harewood Square, in the
County of Middlesex, Engineer, for the Invention of "IMPROVE-
MENTS IN THE MANUFACTURE OF PACKING FOR STUFFING BOXES, PISTONS,
AND BEARINGS."-Partly a communication from Ernest Thorold, of
Lee, in the County of Kent (since deceased).
Sealed the 5th September 1868, and dated the 20th March 1868.
PROVISIONAL SPECIFICATION left by the said Sidengham Duer at
the Office of the Commissioners of Patents, with his Petition, on
the 20th March 1868.
I, SIDENGHAM DUER, of Harewood Square, in the County of Mid-
dlesex, Engineer, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE MANUFACTURE OF PACKING FOR STUFFING BOXES,
PISTONS, AND BEARINGS," to be as follows:-
This Invention relates to the production of an economical and
enduring packing, which will serve also the purposes of a lubricant
to the parts to which it is applied. The packing consists of a plastic
compound which admits of modification so far as the substances com-
posing it are concerned without materially affecting its efficiency.

page_text: A satisfactory result may be obtained from a packing composed of the
following ingredients and proportions of ingredients:-Take one part
of soft soap dissolved in an equal bulk of hot water, and intimately mix
therewith five parts of wood chips or shavings and four parts of French
chalk or black lead or French chalk and black lead mixed together in
equal parts. The compound thus prepared may be applied to the
stuffing boxes, pistons, or bearings, and treated like ordinary packing.
When the packing is to be used in such positions that from its gravity.
it is difficult to introduce it, as in the various parts of inverted or
horizontal engines, it may be wrapped in paper or in a woven fabric
saturated in or coated with the compound.
The proportions of the ingredients as given above may be varied.
The packing will also answer its purpose partially without any soft
soap and with different quantities of the other materials, and oil may
be used to take the place of the soap solution. Instead of using wood
chips or shavings as the vehicle for the mineral lubricant, rags and
other fibrous substances manufactured or unmanufactured, cork, straw,
Bawdust, leaves, and dust or shavings of ebonite may be employed.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Sidengham Duer in the Great Seal Patent Office
on the 19th September 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, SIDENGHAM
DUER, of Harewood Square, in the County of Middlesex, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twentieth day of March, in the year
of our Lord One thousand eight hundred and sixty-eight, in the
thirty-first year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said Sidengham Duer, Her
special licence, that I, the said Sidengham Duer, my executors,
administrators, and assigns, or such others as I, the said Sidengham
Duer, my executors, administrators, and 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,

page_text: 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 THE MANUFACTURE OF PACKING FOR STUFFING BOXES,
PISTONS, AND BEARINGS," the same being the result partly of a com-
munication made to me by Ernest Thorold, of Lee, in the County of
Kent (since deceased), and partly of Invention and discovery made by
me, upon the condition (amongst others) that I, the said Sidengham
Duer, my executors or administrators, by an instrument in writing under
my, or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, 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 months next and
immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Sidengham Duer, do hereby declare
the nature of the said Invention, and in what manner the same is
to be performed, to be particularly described and ascertained in and
by the following statement (that is to say) :-
:-
This Invention relates to the production of an economical and
enduring packing, which will serve also the purposes of a lubricant
to the parts to which it is applied. The packing in its most approved
form consists of a plastic compound, the constituents of which admit
of modification as hereafter explained without materially affecting the
efficiency of the packing. A satisfactory result may be obtained from
a packing composed of the ingredients and proportions of ingredients
prepared and combined in the following manner: Take one part by
weight of soft soap and dissolve it in an equal bulk of hot water; take
also five parts by weight of saw dust, chips, or shavings of lignum
vitæ and four parts by weight of steatite (French chalk), or black lead.
finely pulverized and free from grit, or a mixture of these two sub-
stances combined, say in equal proportions, and having intimately mixed
them together, add them to the solution of soft soap, and by any
suitable contrivance effect a thorough combination of the several
substances. A moist plastic compound will thus be produced, which
may be applied to the stuffing boxes, pistons, or bearings, and treated
like ordinary packing, and which besides constituting an enduring
packing will serve as an efficient lubricant. When this lubricant
packing is required to be used in such positions that from its gravity
it would be difficult to introduce it in a plastic form, as in many parts

page_text: of inverted or horizontal engines, it may be wrapped in paper or in a
woven fabric saturated in or coated with the compound.
I would here remark that the packing has been found to answer the
purpose as a lubricant without the use of soft soap, and with different
proportions differing from those above stated of the other materials,
and oil may if thought desirable be used to take the place of the soap
solution. The chief use of the soap or oil is to affect a permanent
amalgamation of the pulverized substances, as it will be found that
the ingredients if left dry will after the most careful mixing be liable
to separate the finer particles of steatite or blacklead sifting through
the wood dust or chips, and thereby deteriorating the lubricating
power of the packing. Instead of using wood chips or shavings as
the vehicle for the mineral lubricant, rags and other waste fibrous
substances, manufactured or unmanufactured, also cork, common saw-
dust, leaves and dust or shavings of ebonite may be employed, the
same being intimately mixed with the saponaceous or other equivalent
substance employed to secure their permanent amalgamation.
Having now set forth the nature of my Invention of " Improvements
in the Manufacture of Packing for Stuffing Boxes, Pistons, and
Bearings," and explained the manner of carrying the same into effect,
I wish it to be understood that under the above in part recited Letters
Patent I claim manufacturing lubricant packing in the manner above
described.
In witness whereof, I, the said Sidengham Duer, have hereunto
set my hand and seal, the Eighteenth day of September, in the
year of our Lord One thousand eight hundred and sixty-
eight.
Witness,
J. W. MOFFATT,
66, Chancery Lane.
SIDENGHAM DUER. (L.s.)