IMPROVE- MENTS IN THE CONSTRUCTION OF FILTERS OR DRAINERS
Year: 1856

page_text: LETTERS PATENT to Frederick Albert Gatty, of Accrington, in the County
of Lancaster, Manufacturing Chemist, for the Invention of "IMPROVE-
MENTS IN THE CONSTRUCTION OF FILTERS OR DRAINERS."
Scaled the 8th May 1857, and dated the 3rd December 1856.
PROVISIONAL SPECIFICATION left by the said Frederick Albert Gatty
at the Office of the Commissioners of Patents, with his Petition, on the
3rd December 1856.
I, FREDERICK ALBERT GATTY, of Accrington, in the County of Lancaster,
Manufacturing Chemist, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN THE CONSTRUCTION OF FILTERS OR DRAINERS," to bo
as follows:-
Filters or drainers constructed according to this Invention are particularly
applicable in the manufacture of garancine. The filters or drainers are of
wood or other suitable material, and are furnished with narrow parallel
slots made with a circular saw or otherwise. The filter or drainer may be
made for fine or coarse work by varying the thickness of wood or other
material forming the sides and bottom, and increasing or diminishing the
size of the slots. In some cases the slots of these filters or drainers are filled
by animal charcoal or other purifying material.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Frederick Albert Gatty in the Great Seal Patent Office on
the 27th May 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, FREDERICK
ALBERT GATTY, of Accrington, in the County of Lancaster, Manufacturing
Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of December, in tho year of our Lord
One thousand eight hundred and fifty-six, in the twentieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
Frederick Albert Gatty, Her special license that I, the said Frederick Albert
Gatty, my,executors, administrators, and assigns, or such others as I, the said
Frederick Albert Gatty, 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 "IMPROVE-
MENTS IN THE CONSTRUCTION OF FILTERS OR DRAINERS," upon the condition
(amongst others) that I, the said Frederick Albert Gatty, 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 Frederick Albert Gatty, do hereby
declare the nature of my 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):―
My improved filters or drainers are particularly applicable in the manufacture
of garancine, but they may be used for other purposes. These improved
filters or drainers are made by preference of wood and of a square shape, but
they may be of other shapes, and other materials may be used. The sides
and bottom of the filter or drainer are furnished with narrow slots made with
a circular saw or otherwise. When the filters or drainers are made of wood
it is requisite to make the slots in a line with the grain of the wood. These
improved filters or drainers may be rendered suitable for filtering different
materials by increasing or diminishing the width of the slots, according to
the fineness or coarseness of the substances to be separated from the liquids.

page_text: In some cases the slots of these filters or drainers may be filled with animal
charcoal or other purifying material. These improved filters or drainers
possess considerable advantages over those in general use, which are usually
made of woollen or other fabric, and are soon injured by being continually
wet, and by the action of acids. My improved filters after being in operation
are easily cleaned, by passing a suitable instrument through the slots, to free
them from any substances adhering thereto.
Having thus particularly described the nature of my Invention, and the
manner of performing the same, I declare that I claim the improved mode of
constructing filters or drainers as described.
In witness whereof, I, the said Frederick Albert Gatty, have hereunto
set my hand and seal, this Twenty-sixth day of May, in the year of
Lord One thousand eight hundred and fifty-seven.
Witness,
H. B. BARLOW,
Manchester.
F. A. GATTY. (L.S.)