IMPROVEMENTS IN MAKING DECOCTIONS OF COFFEE AND OTHER MATTERS
Year: 1843

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, MOSES.
POOLE, of Lincoln's Inn, in the County of Middlesex, 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 Westminster, the Twenty-ninth day of April, in the sixth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Moses Poole, Her especial licence, full power, sole privilege and
authority, that I, the said Moses Poole, my exors, admors, and assigns, or
such others as I, the said Moses Poole, 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, the Invention of "IMPROVEMENTS IN MAKING DECOCTIONS OF COFFEE
AND OTHER MATTERS," communicated to me by a certain foreigner residing
abroad; in which said Letters Patent is contained a proviso, that I, the said
Moses Poole, shall cause a particular description of the nature of the said
Invention and in what manner the same is to be performed, to be enrolled
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
Moses Poole, do hereby declare that the nature of the said Invention, and

page_text: the manner in which the same is to be performed, are fully described and
ascertained in and by the following statement thereof, reference being had
to the Drawing hereunto annexed, and to the figures and letters marked
thereon, (that is to say) :-
-
The Invention relates to that description of apparatus used for obtaining
decoctions of coffee and other matters where two vessels are used one above
the other, the coffee or other matter from which a decoction is desired to be
made being placed on a perforated or other filtering surface in the upper
vessel, and on heat being applied to the lower vessel, which contains the water
to be used, such water, becoming heated to the boiling point, is forced by the
steam generated to rise out of the lower vessel into the upper vessel and mix
with the coffee or other matter placed on the filtering surface, the water not
being forced to rise into the upper vessel till boiling, owing to there being a
small hole in the pipe forming the communication between the upper and
lower vessel, by means of which, as the water and air in the lower vessel
become heated, the air passes off through such small hole and away through
the upper vessel; but as soon as the water is boiling, and giving off steam too
quickly for it to get away through such small hole, the pressure of steam will
cause the boiling water to rise up out of the lower vessel into the upper vessel;
and in order to get the decoction into the lower vessel, the apparatus used for
heating the lower vessel is removed or the flame put out, and then, by the
cooling of the lower vessel, a partial vacuum is produced therein, which brings
the pressure of the external air to press on the decoction in the upper vessel,
and such pressure quickens the filtration of the decoction into the lower
vessel. I have thus shortly stated the nature of the apparatus to which the
improvements relate, in order to state that no claim is made to such apparatus,
or its mode of action, the same being secured by a Patent granted to
Platow on
; the present
improvements relating to the construction of the lower vessels, used in
such descriptions of apparatus, of glass, together with glass tubes for con-
ducting the water out of the lower vessel into the upper one, and also for
drawing off the decoction from the lower vessel.
The Drawing shews the section of an apparatus constructed according to this
Invention. A is the upper vessel; B is a glass tube, descending from the upper
to the lower vessel; C is the small hole through which the air escapes; D is the
lamp used for heating the lower vessel; E is the lower vessel, which for strength,
and convenience of making, I prefer to be globular, as shewn; but, if desired,
that
may be varied. This vessel E, in place of being of metal, as heretofore, is
to be made of glass. F is a tube of glass forming part of the vessel E, which

page_text: receives the metal cock or tap G, as is shewn. The workmen, in making the
vessel E, proceed as follows:-One workman blows and shapes the vessel E, and
then places it in the furnace to heat it, as is well understood; when other parts
are to be affixed to glass vessels, another workman takes some melted glass
on his pipe for the tube, and the workmen bring the parts together; the first
workman blowing through his pipe produces a hole through the vessel E, and
thus they form the vessel and tube as shewn. If the filter used is liable to be
stopped up by the grounds, and thus prevent air getting into the vessel E,
there may be a cock applied at the upper part of the vessel E, to be opened to
admit air when the decoction is being drawn off.
Having thus described the nature of the Invention, I would wish to be
understood, that what I claim is, constructing the lower vessel E, the tube B,
and the tube F, of glass, when used for constructing apparatus for obtaining
decoctions of coffee or other matter, as above described.
In witness whereof, I, the said Moses Poole, have hereunto set my
hand and seal, this twenty-eigth day of October, in the year of our
Lord One thousand cight hundred and forty-three.