IMPROVEMENTS IN COFFEE POTS
Year: 1872

page_text: PROVISIONAL SPECIFICATION left by Edward Heinson Huch at the
Office of the Commissioners of Patents, with his Petition, on the
3rd April 1872.
I, EDWARD HEINSON HUCH, of Brunswick, in the Empire of Germany,
do hereby declare the nature of the said Invention for "IMPROVEMENTS IN
COFFEE POTS," to be as follows :-
This Invention has mainly for its object to so construct coffee pots
For
as to prevent the evaporation and consequent loss of the aroma.
this purpose the pot is formed with an upper and lower chamber
separated from one another by a moveable funnel having within it a
fine grating covered with a piece of flannel or felt held down by a ring
fitting within the funnel. Through the centre of the funnel passes a
pipe which descends nearly to the bottom of the lower chamber; the
upper end of the pipe rises above the grating in the funnel, and at its
top carries a smaller grating having a loose cap fitted over it which will
allow water to rise up through the pipe, but will prevent its returning
back. The ground coffee is placed in the upper chamber of the pot and
rests on the flannel or felt and grating at its bottom. The lower

page_text: chamber is filled or partly filled with water, and the pot is placed upon
a stand in which is a small lamp to come below the bottom of the pot;
so soon as the water in the lower chamber of the pot commences to boil
it rises up through the central pipe before mentioned into the upper
chamber; the lamp is then extinguished and as a vacuum forms in the
lower chamber the water is drawn back into it from the upper chamber
through the ground coffee, but in place of its passing back by the pipe
through which it previously rose as heretofore usual, it passes back
through the flannel or felt and the grating which carries it and through
small holes in the bottom of the funnel.
The upper chamber of the pot is covered with a lid, and to prevent
the escape of any aroma a water joint is employed to seal the lid. For
this purpose the upper part of the top chamber is made double sided,
a small quantity of water is placed into the space between the double
sides into which the lid dips, and so a water seal is formed.
other coffee pots may similarly be sealed with a water joint.
The lids of
In some cases I construct the pot in such a manner that the rising
of the water into its upper chamber shall automatically extinguish the
lamp which is below the bottom of the pot. To effect this I connect
the lid of the lamp by rods to a bar which passes across the lid of the
pot and rests upon it when the water rises up into the chamber
upper
of the pot and comes up to the under side of the lid or up to a disc or
false bottom descending from it, the lid of the pot rises and in so
doing it closes the lid of the lamp and extinguishes the flame. If the
extinguishing of the lamp is not required to be effected automatically
I make the lid of the pot of glass in order that it may be seen when the
water ceases to rise from the lower into the upper chamber of the pot,
as the lamp must then be at once extinguished.
The lower part of the pot is as usual provided with a tap by which
the coffee is to be drawn off. The upper part of the lower chamber
of the pot may also be furnished with a funnel and inlet fitted with
a tap by which either hot or cold water may be poured into the lower
chamber.