AN IMPROVEMENT IN THE F ГВЕРАВАТІО СВАРИТТЕ, UK FLUMBAGU, UK DHACA DEAD. PRO
Year: 1858

page_text: LETTERS PATENT to George Augustus Breillat Chick, of 56, Milk Street,
Leek Lane, and Callow Hill Street, in the Parish of St. Paul, in the City
and County of Bristol, for the Invention of "AN IMPROVEMENT IN THE
F
ГВЕРАВАТІО
СВАРИТТЕ, UK FLUMBAGU, UK DHACA DEAD.
PROVISIONAL SPECIFICATION left by the said George Augustus Breillat
Chick at the Office of the Commissioners of Patents, with his Petition,
on the 7th July 1858.
I, GEORGE AUGUSTUS BREILLAT CHICK, of 56, Milk Street, Leek Lane, and
Callow Hill Street, in the Parish of St. Paul, in the City and County of
Bristol, do hereby declare the nature of the Invention for "AN IMPROVE-
MENT IN THE PREPARATION OF GRAPHITE, OR PLUMBAGO, OR BLACK LEAD," to be as
follows:-
This Invention has for its object an improvement in the preparation of
graphite, or plumbago, or black lead, and consists in grinding the black lead to
a fine powder, and mixing it with a small quantity of olive oil or other 'fatty or
oily matter; the compound is pressed together, and after some days it is again
ground, and is then ready for use. For convenience of package and use, the
powder may, if desired, be pressed together so as to form cakes or solid
blocks.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said George Augustus Breillat Chick in the Great Seal Patent
Office on the 4th January 1859.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
AUGUSTUS BREILLAT CHICK, of 56, Milk Street, Leek Lane, and Callow Hill
Street, in the Parish of St. Paul, in the City and County of Bristol, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventh day of July, in the year of our Lord One
thousand eight hundred and fifty-eight, in the twenty-second year of Fler reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
George Augustus Breillat Chick, Her special licence that I, the said George
Augustus Breillat Chick, my executors, administrators, and assigns, or such
others as I, the said George Augustus Breillat Chick, my executors, adminis-
trators 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, use, exercise, and vend, within the United Kingdom
of Great Britain and Ireland, the Channel Islands, and Isle of Man, an In-
vention for "AN IMPROVEMENT IN THE PREPARATION OF GRAPHITE, OR PLUMBAGO,
OR BLACK LEAD," upon the condition (amongst others) that I, the said
George Augustus Breillat Chick, 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 George Augustus Breillat Chick, 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 thereof, that is to say:-
This Invention has for its object an improvement in the preparation of
graphite, or plumbago, or black lead, and consists in grinding the black lead to
a fine powder, and mixing it with a small quantity of olive oil or other fatty
or oily matter; the compound is pressed
again ground, and is then ready for use.
use, the powder may, if desired, be pressed
solid blocks.
together, and after some days it is
For convenience of package and
together so as to form cakes or

page_text: Having thus stated the nature of my Invention, I will proceed more fully to
describe the manner of performing the same.
The proportions in which the black lead and the oily or fatty substances
may be used admits of considerable variation. Any of the known oily and
fatty matters, both vegetable and animal, may be used, but it is preferred to
employ for this purpose equal quantities of linseed and olive oils with the
addition of half a pint of gold size to every gallon of each of the said oils.
The black lead is first reduced to the state of powder, and then intimately
mixed with the oily or fatty substance. The proportions preferred are one lb.
of the above mentioned mixture to each 28 lbs. of the powder of black lead.
These matters having been intimately mixed, the compound is subjected to
pressure in moulds so as to produce moulded blocks of from some ounces to a
lb. in weight each. These moulded blocks are then allowed to stand in the
air for several days; I have usually permitted them to stand for twenty-one
days. The blocks are then reduced to powder, and the black lead is suitable
for use.
When the black lead thus prepared is desired to be sold in moulded
lumps, I again introduce the powder into moulds of any suitable form; I,
however, prefer them to be cylindrical, and by hydraulic or other pressure I
mould the powder into the forms desired; but if the black lead be sold
in the form of powder, I prefer to pack the same in cylindrical or other
boxes.
In witness whereof, I, the said George Augustus Breillat Chick, have
hereunto set my hand and seal, this Thirtieth day of December, in
the year of our Lord One thousand eight hundred and fifty-eight.
Witness,
J. S. BUNCE,
GEORGE AUGUSTUS BREILLAT CHICK. (L.S.)
of 33, Somerset Street,
Kingsdown, Bristol.