A NEW AND IMPROVED METAL FOUNDERS' BLACKING, APPLICABLE ALSO AS A LUBRICANT
Year: 1880

page_text: LETTERS PATENT to John Shepherd Sawrey and Anthony Patterson, both of
Ulverston, in the County of Lancaster, Engineers, for an Invention of
"A NEW AND IMPROVED METAL FOUNDERS' BLACKING, APPLICABLE ALSO AS
A LUBRICANT.”
PROVISIONAL SPECIFICATION left by the said John Shepherd Sawrey
and Anthony Patterson at the Office of the Commissioners of Patents on the
12th June 1880.
JOHN SHEPHERD SAWREY and ANTHONY PATTERSON, both of Ulverston, in the
County of Lancaster, Engineers. "A NEW AND IMPROVED METAL FOUNDERS'
BLACKING, APPLICABLE ALSO AS A LUBRICANT."
According to our Invention we utilize the carbonaceous crust which forms on
the inside of gas and other coking retorts to the manufacture of metal founders'
blacking. For this purpose we cool the said crust, by preference as it comes from
the retort, by means of dilute sulphuric acid or water, with or without soapstone
or salt, and grind or otherwise pulverize it into a fine powder and mix it with
prepared plumbago during or after the pulverizing; or for some qualities the plumbago
may be omitted.
This powder may also, in a very finely pulverized condition,
be used as a lubricant for axle bearings and for moving parts of machinery in
general, especially under heavy pressure.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Shepherd Sawrey and Anthony Patterson in the Great Seal
Patent Office on the 11th December 1880.
JOHN SHEPHERD SAWREY and ANTHONY PATTERSON, both of Ulverston, in the
County of Lancaster, Engineers. "A NEW AND IMPROVED METAL FOUNDERS'
BLACKING, APPLICABLE ALSO AS A LUBRICANT."
According to our Invention we procure plumbago, which we obtain by preference
from the Borrowdale plumbago mines in Cumberland; this plumbago we then
pulverise and wash with acids and water; to this plumbago we then add about one
third part of the carbonaceous crust which forms on the inside of gas and other coking
retorts, and for this purpose we cool the said crust, by preference as it comes from
the retort, by means of dilute sulphuric acid or water with or without soap-stone
or salt, we then grind the plumbago and the carbonaceous crust prepared as above,
and otherwise pulverise both into a fine powder, and for this purpose we prefer to
employ special grinding machinery, not forming the subject matter of this Patent,
which also mixes in proportionate parts, but other grinding apparatus such as
edgerunners may be used; after undergoing this process the plumbago and crust
form a beautiful metal founders' blacking.
Plumbago and carbonaceous crust, prepared substantially in the manner before
described, is applicable as a lubricant suitable for axle bearings and for moving
parts of machinery in general, especially under heavy pressure; the powder prepared
as aforesaid is when used as a lubricant mixed with oil or other fatty matter in
suitable proportions, having regard to the purpose for which the lubricant is
required, that is to say, from seven to nine parts of plumbago to one part of the
powdered carbonaceous crust mixed with fatty matter.
Having now described the nature of the said Invention, and in what manner the
same is to be performed, we declare that we claim,―
The new or improved metal founders' blacking and the lubricant, consisting of
or containing plumbago and carbonaceous retort crust prepared and combined
substantially in manner hereinbefore described.
In witness whereof, we, the said John Shepherd Sawrey and Anthony
Patterson, have hereunto set our hands and seals this Eighth day of
December, in the year of our Lord One thousand eight hundred and eighty.
JOHN S. SAWRE
(L.S.)
ANTHONY PATTERSON. (L.S.)