A METHOD OF PRODUCING AN IMPROVED BLACK PIGMENT AND OBTAINING PHOSPHATES AND OTHER SUBSTANCES FROM THE WASTE PORTIONS OF THE HOP PLANT
Year: 1870

page_text: LETTERS PATENT to William Robert Lake, of the "International
Patent Office," Southampton Buildings, London, Consulting
Engineer, for the Invention of "A METHOD OF PRODUCING AN IMPROVED
BLACK PIGMENT AND OBTAINING PHOSPHATES AND OTHER SUBSTANCES FROM
THE WASTE PORTIONS OF THE HOP PLANT."-A communication from
PROVISIONAL SPECIFICATION left by the said William Robert Lake
at the Office of the Commissioners of Patents, with his Petition, on
the 22nd February 1870.
I, WILLIAM ROBERT LAKE, of the "International Patent Office,"
Southampton Buildings, London, Consulting Engineer, do hereby
declare the nature of the said Invention for "A METHOD OF PRODUCING
AN IMPROVED BLACK PIGMENT AND OBTAINING PHOSPHATES AND OTHER SUBSTANCES
FROM THE WASTE PORTIONS OF THE HOP PLANT," a communication, to be as
follows:-
The black pigments now manufactured, except those produced from
soot or smoke, are too costly for general use. Many attempts have been

page_text: made to produce a cheap and good black which by mixing with white
gives a pure gray.
Such a black is produced by heating the hop bine in closed vessels
and pulverizing the charcoal obtained by this treatment. As the
hop bine has hitherto been wasted it may be had at a slight cost,
and therefore the black produced from hop bine will be very cheap.
This product can be much improved by agitating it with acids, as by
this agitation the mixed salts, which have all a white colour, are
eliminated. For this purpose the pulverized black is mixed with dilute
sulphuric acid or muriatic acid. To this mixture is added pure water
till all the soluble substances are eliminated. By this process a solution
is produced containing sulphur salts, phosphates, alkaline carths, and
alkalis, which form excellent manure, especially for hops.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Robert Lake in the Great Seal Patent
Office on the 20th August 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
ROBERT LAKE, of the "International Patent Office," Southampton
Buildings, London, Consulting Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her s
Letters Patent, bearing date the Twenty-second day of February, in the
year of our Lord One thousand eight hundred and seventy, in the thirty-
third year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said William Robert Lake, Her special licence
that I, the said William Robert Lake, my executors, administrators,
and assigns, or such others as I, the said William Robert Lake, 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, use, exercise,
and vend, within the United Kingdom of Great Britain and Ireland,
the Channel Islands, and Isle of Man, an Invention for "A METHOD OF
PRODUCING AN IMPROVED BLACK PIGMENT AND OBTAINING PHOSPHATES AND OTHER
SUBSTANCES FROM THE WASTE PORTIONS OF THE HOP PLANT," a communication
to me from abroad by Frederic Rotter, of Amberg, in the Kingdom

page_text: of Bavaria, upon the condition (amongst others) that I, the said William
Robert Lake, my executors or administrators, by an instrument in
writing under my, or their, or one of their hands and scals, 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 William Robert Lake, 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 :-
The black pigments now manufactured, except those produced from
soot or smoke, are too costly for general use. Many attempts have been
made to produce a cheap and good black which by mixing with white
gives a pure gray.
Such a black is produced by heating the hop bine in closed vessels,
and by pulverizing the charcoal obtained by this treatment. As the
hop bine has hitherto been wasted it may be had at a slight cost, and
therefore the black produced therefrom will be very cheap.
This product can be much improved by agitating it with acids, as by
this agitation the mixed salts, which have all a white colour, are
climinated. For this purpose the pulverized black is mixed with dilute
sulphuric acid or muriatic acid. To this mixture is added pure water
till all the soluble substances are eliminated. By this process a solution
is produced containing sulphur salts, phosphates, alkaline earths, and
alkalis, which form excellent manure, especially for hops.
In witness whereof, I, the said William Robert Lake, have here-
unto set my hand and seal, this Twentieth day of August, in the
year of our Lord One thousand eight hundred and seventy.
0
Witness,
W. J. LOWE.
WILLIAM ROBERT LAKE. (L.S.)