AN IMPROVED LUBRICATING PACKING
Year: 1868

page_text: LETTERS PATENT to William Robert Lake, of the "International
Patent Office," No. 8, Southampton Buildings, Chancery Lane, in
the County of Middlesex, Consulting Engineer, for the Inven-
tion of "AN IMPROVED LUBRICATING PACKING."-A communication from
abroad by William Johnson Towne, of Newtonville, Massachusetts,
United States of America.
Sealed the 12th June 1868, and dated the 22nd April 1868.
COMPLETE SPECIFICATION filed by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 22nd April 1868, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the "International Patent Office," No. 8, Southampton
Buildings, Chancery Lane, in the County of Middlesex, Consulting
Engineer, send greeting.
WHEREAS I am in possession of an Invention for "AN IMPROVED
LUBRICATING PACKING;" and have petitioned Her Majesty to grant unto
me, my executors, administrators, and assigns, Her Royal Letters Patent

page_text: for the same, and have made solemn Declaration that it has been
communicated to me from abroad by William Johnson Towne, of
Newtonville, Massachusetts, United States of America.
NOW KNOW YE, that I, the said William Robert Lake, do hereby
declare that the following Complete Specification, under my hand
and seal, fully describes and ascertains the nature of the 'said
Invention, and in what manner the same is to be performed, in and
by the following statement, reference being had to the accompanying
Drawing making part of this Specification:-
Invention consists in the application to the exterior surface of
packing compus_nowdered and fibrous materials of a glazing or
coating of a glutinous substaneither alone or mixed with a powdered
mineral substance or substances, which ging prevents the escape of
the powder contained in the packing when it is being handled or
during its transportation. The glazing or coating also serves to retain
the powdered mineral substance on the exterior surface of the packing
as required to bring it into immediate contact with the metallic surface
to which it is applied.
My Invention also consists in the application to the exterior surface
of ordinary packing composed of fibrous material only of a glazing or
coating composed of a glutinous substance and a powdered mineral
substance or substances combined together.
The said Invention furthermore consists in a packing composed of
fibrous material, a powdered mineral substance or substances, and a
glutinous substance when the whole are intimately mixed together
during the process of braiding, twisting, or plaiting, the glutinous
substance and powdered mineral being in the form of a paste.
To enable others skilled in the art to understand and use my Invention
I will proceed to describe the manner in which I have carried it into
practice.
Figures 1, 2, 3, and 4 represent pieces of my improved packing
partially in section and partially in elevation. In Figure 1 A represents
a piece of packing composed of cotton or other fibrous material braided,
twisted, or plaited, and combined with soapstone and asbestos, soapstone
alone, or other powdered mineral substance of a suitable nature, which
is worked into it. while it is being manufactured. The exterior surface
of this packing is covered with a glazing or coating. a which may be

page_text: applied by drawing the packing through a trough or box containing a
paste or sizing composed of flour starch, potato starch, or other suitable
glutinous material that will dry rapidly on exposure to the air and
which will become readily softened by the action of steam or water, and
a sufficient quantity of soapstone and asbestos (in the proportion of about
five-sixths of the former to one-sixth of the latter), or soapstone alone,
or other powdered mineral substance or. substances of a lubricating
nature to bring it to the required consistency. This glazing or coating
when dry prevents the escape of the powder contained in the packing
during its transportation which prevents loss in weight, and also renders
the packing less dusty to handle, while by coating the exterio
of the said packing the powdered mineral subst-18 brought as
required into immediate contact with metallic surface to which the
packing is applied, thus protecting the fibrous material and rendering
my improved packing particularly applicable in situations exposed to
a great degree of heat, as, for instance, where superheated steam is used.
I do not confine myself to the particular mode above described of
manufacturing my improved packing as the process may be varied; for
instance, a piece of packing composed of powdered and fibrous materials
may be merely coated with a sizing or glazing of a glutinous substance
instead of with a paste composed of glutinous and powdered substances
as first described. A piece of packing of this description is represented
in Figure 2, in which B is the packing, and b the glazing or sizing
on its exterior surface; or a piece of ordinary packing .composed of
fibrous material only may be covered with a coating of the paste first
described composed of glutinous and powdered substances, as seen in
Figure 3, C representing the fibrous material, and c the coating of
paste on its exterior surface. Instead of the packing being glazed or
coated on its surface as above described, the paste or sizing above
mentioned composed of glutinous and powdered substances may be
worked into the fibrous material while the packing is being braided,
twisted, or plaited, a piece of packing of this description being repre-
sented in Figure 4. The glutinous material which I employ is of such
a nature that it will not interfere with the lubricating properties of the
packing, while it will dry rapidly on exposure to the air and will be
readily softened when the packing is exposed to the action of steam or
water, which renders it flexible as required.

page_text: Having thus fully described the said Invention as communicated to
me by my foreign correspondent, and shown how the same may be
conveniently and advantageously carried into practice, I wish it under-
stood that I do not claim a packing composed of a dry powdered
substance or substances and fibrous material; but I claim, the application
of a glazing or coating composed of a glutinous substance, either alone
or mixed with a powdered mineral substance or substances, to the
exterior surface of a packing composed of powdered and fibrous materials,
substantially as and for the purpose described.
I also claim the application of a glazing or coating composed of a
gesubstance and a powdered mineral substance or substances
combined togetut the exterior surface of ordinary packing composed
of fibrous material only, subsumtially as set forth.
I also claim a packing composed or brous material, a powdered
mineral substance or substances, and a glutinous substance when the
whole are intimately mixed and worked together during the process of
braiding, twisting, or plaiting, substantially as described.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Twenty-second. day of April,
in the year of our Lord One thousand eight hundred, and sixty-.
cight.
WILLIAM ROBERT LAKE. (L.S.)
Witness,
THO. N. PALMER,
Clerk to Messrs. Haseltine, Lake, & Co.,
8, Southampton Buildings,
W.C.