IMPROVEMENTS IN FILTERING LIQUIDS
Year: 1841

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
CHESTERMAN, of Burford, in the County of Oxford, Gentleman, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Letters Patent under the Great Seal of Great Britain, bearing date at West-
minster, the Twenty-third day of June, in the fifth year of Her reign, did, for
Herself, Her heirs and successors, give and grant unto me, the said William
Chesterman, Her especial licence, full power, sole privilege and authority, that
I, the said William Chesterman, my exors, adñors, and assigns, or such others
as I, the said William Chesterman, my exors, admors, or assigns, should at any
time agree with, and no others, from time to time and at all times during the
term of years therein expressed, should and lawfully might make, use, exercise,
and vend, within England, Wales, and the Town of Berwick-upon-Tweed, my
Invention of "IMPROVEMENTS IN FILTERING LIQUIDS;" in which said Letters
Patent is contained a proviso, that I, the said William Chesterman, shall
cause a particular description of the nature of my said Invention, and in what
manner the same is to be performed, to be inrolled in Her said Majesty's High
Court of Chancery within six calendar months next and immediately after the
date of the said in part recited Letters Patent, as in and by the same, reference
being thereunto had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
William Chesterman, do hereby declare that the nature of my said Invention;

page_text: and the manner in which the same is to be performed, are described and
ascertained in manner following (that is to say):-
My Invention relates to a mode of constructing apparatus to be used for
filtering decoctions of coffee or other matters when subjected to heat, but does
not apply to filtering fluids generally...
DESCRIPTION OF THE DRAWING.
Figure 1 is a vessel A, which in this case may be made of tin plate, having
a horizontal handle B, of wood. Figure 2 is a vertical section of the vessel A
when inverted, and standing on its conical mouth C. Figure 3 is a plan of
the bottom D of the vessel A, shewing a hole through the centre to admit the
heating material, hereafter mentioned.. A tube E is open at the end, where
it is united with D by brazing or otherwise, so as to make an air-tight joint,
and the tube is closed at the other end next to C. This tube, when inverted,
as in Figure 2, is to receive the metal heater, Figure 4, having a ring F at
top, by which it can be drawn out of the fire by a wire hook when hot, and
dropped into the tube E; but before doing so, ground coffee, or other matter
from which it is desired to obtain a decoction, in quantity proportioned to the
size of the vessel A, is put into the vessel through C; then hot or boiling water
is poured in till it rises to C, and a strainer of linen or cotton cloth or other
straining material is fixed on or in C; then the vessel A is inverted, as shewn
in Figure 2, and while in this position, the said heater being ready is dropped
into E; the heat thus imparted to the contained liquid causes steam or vapour
to rise towards D, and by expanding to expel the liquid in a clear state
through the said filtering material at C, the liquid being received into any
proper vessel. The size & shape of the vessel A may be varied, and the
materials of which the vessel A and tube E are made may be of zinc or other
suitable material, and the nature of the filtering material employed may
be used.
Having thus described the nature of my Invention, and the manner of
carrying the same into effect, I would have it understood that I claim the
mode of.constructing apparatus to act by being inverted, aided by the applica-
tion of heat.
In witness whereof, I, the said William Chesterman, have hereunto set my
hand and seal, this Eighteenth day of December, One thousand eight
hundred and forty-one.
WILLIAM (L.S.) CHESTERMAN.

page_text: AND BE IT REMEMBERED, that on the Eighteenth day of December,
in the year of our Lord 1841, the aforesaid William Chesterman came before
our said Lady the Queen in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according
to the tenor of the Statute made for that purpose.
Inrolled the Twenty-first day of December, in the year of our Lord One
thousand eight hundred and forty-one.