Improvements in Coffee-pots and the like.
Year: 1892

page_text: Date of Application, 26th Apr., 1892
Complete Specification Left, 26th Jan., 1893-Accepted, 11th Mar., 1893
PROVISIONAL SPECIFICATION.
Improvements in Coffee-pots and the like.
I, GEORGES LOUIS BLANCHET, of 224, Rue St. Maur, Paris, in the Republic
of France, Manufacturer of Tin Goods, do hereby declare the nature of this
invention to be as follows:-
This invention consists of a vessel adapted to contain the water and the coffee
when made, and also serving for pouring it out; of a filter, preferably in the
shape of a bag made of suitable fabric, a diaphragm acting as a plunger or piston,
for pressing down and opening the filter, when the coffee is ready, and a lid covering
both the filter and the pot.
To make coffee in the coffee-pot constructed according to this invention, water
and ground coffee are first introduced into the same, and the filter is arranged in
position. The pot is then closed by means of the lid and placed on the fire. The
lid has a central perforation through which passes the rod of the diaphragm or
plunger which rests at the bottom of the filter. When the water boils, which is
indicated by the escaping steam, the coffee is ready, and to complete the operation
it is only necessary to push down the filter, by means of the piston-rod, through
the liquid, and down to the bottom of the pot; whereupon the coffee may be
served by grasping the handle of the pot, and pouring out in the usual way.
The main cylindrical body or vessel of the coffee-pot may vary in size according
to the quantity of coffee it is desired to make at a time. Its bottom-plate is
sufficiently thick to be capable of withstanding the contact of the fire. The vessel
is open at the top and provided with a flaring edge or shoulder of slightly
increasing diameter. To one side of it is rigidly secured on the desired level a
sleeve or ferrule to which is fitted in the well-known manner a wooden, porcelain
or other handle. This I prefer to screw into its sleeve, so that it may for
packing purposes be conveniently unscrewed and placed inside the pot if required,
to save room.
At right angles to the plane of the handle the usual spout is formed on the
flaring crown which is suitably perforated. At a point diametrically opposite to
the spout, is arranged a small tube through which the steam escapes as soon as it
is generated within the pot, its escape being a sign of the boiling of the water,
and consequently of the coffee being ready.
To the cylindrical edge of the lid or cover which enters the crown or shoulder
of the coffee-pot, is fitted a ring or band to which the filter, preferably made of
fabric, is sewn or otherwise attached. The cylindrical edge of the lid is perforated,
which perforation, when the lid is in its proper place, coincides with the spout,
the ring or band being correspondingly notched. A pin, arrow or other mark on
the lid, facilitates this adjustment of the opening.
The filter is, as before stated, preferably made in the shape of a bag of suitable
fabric, and stitched or otherwise secured to the ring, its bottom being practically
of the same diameter as the pot. The length or depth of the bag of course
depends on the size of the coffee-pot.
Into the filter thus constructed is inserted the perforated diaphragm or plunger,
secured to the end of the rod passing through the lid, which is provided for the
purpose with a small tube or guiding sleeve; and externally the said rod carries a
suitable knob for its convenient operation.
To facilitate the adjustment or removal of the lid, it is moreover also provided
with a bow or yoke-shaped handle.
The operation is as follows :-

page_text: When it is desired to make coffee, the lid, and then the filter, are removed.
The ground coffee is placed on the bottom of the vessel and the required amount
of water is poured over it, whereupon the filter and lid are replaced, the former
retaining its folded-up position.
The coffee-pot with its contents is then placed on a fire, gas-stove or the like
and left there until the water boils which as soon as it does, becomes noticeable, by
a small jet of steam escaping from the tube. As soon as the steam is perceived
escaping, the coffee-pot should be removed from the fire, and then, by pressing
upon the knob the diaphragm or plunger is pushed down, thereby causing the
filter to become unfolded. As the filter thus descends the liquid passes through
the meshes of the fabric in a very satisfactory condition and without any
appreciable loss of heat. The coffee is then ready to be poured out, and the
vessel may be entirely emptied.
The cleaning of this coffee-pot is very easy, as it may be readily taken to
pieces.
The filtering bag may if preferred be replaced by a filtering plunger or piston
the diameter of which should be equal, or practically so, to the inner diameter of
the pot. The gradual descent of this plunging filter would in this case also
produce satisfactory filtration. This plunger may be lined with flannel or other
suitable material.
Dated this 26th day of April 1892.
W. P. THOMPSON & BOULT,
Agents for the Applicant.
COMPLETE
SPECIFICATION.
Improvements in Coffee-pots and the like.
I, GEORGES LOUIS BLANCHET of 224 Rue St. Maur, Paris, in the Republic of
France, Manufacturer of Tin Goods, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
This invention consists of a vessel adapted to contain the water and the coffee
when made and also serving for pouring it out; of a filter, preferably in the
shape of a bag made of suitable fabric, a diaphragm acting as a plunger or piston,
for pressing down and opening the filter, when the coffee is ready, and a lid
covering both the filter and the pot. While coffee is more particularly referred to
in this Specification it will be understood that the pot may also be utilized for
making tea.
To make coffee in the coffee-pot constructed according to this invention, water
and ground coffee are first introduced into the same, and the filter is arranged in
position. The pot is then closed by means of the lid and placed on the fire. The
lid has a central perforation through which passes the rod of the diaphragm or
plunger which rests at the bottom of the filter. When the water boils, which is
indicated by the escaping steam, the coffee is ready and to complete the operation
it is only necessary to push down the filter by means of the piston-rod through the
liquid, and down to the bottom of the pot, whereupon the coffee may be served by
grasping the handle of the pot, and pouring out in the usual way.
The invention will be best understood by reference to the accompanying
drawings, in which
Fig. 1 is a vertical section of the improved coffee-pot all the parts being shown
in the positions they respectively occupy after or during the completion of the
filtering process.
Fig. 2 is a plan thereof, the lid or cover being removed.
Fig. 3 is another vertical section of the coffee-pot, on line 1-2, Fig. 2, the parts
being shown in the positions they occupy before use.

page_text: Fig. 4 is a detail view of the filtering bag, and
Figs. 5 and 6 are respectively an elevation and a plan of the piston which is
independent of the filtering bag.
The main cylindrical body or vessel a of the coffee-pot may vary in size
according to the quantity of coffee it is desired to make at a time. Its bottom-
plate a' is sufficiently thick to be capable of withstanding the contact of the fire.
The vessel is open at the top and provided with a flaring edge or shoulder 6 of
slightly increasing diameter. To one side of it is rigidly secured on the desired
level a sleeve or ferrule c, to which is fitted in the well-known manner a wooden,
porcelain, or other handle d. This I prefer to screw into its sleeve, so that it may
for packing purposes be conveniently unscrewed and placed inside the pot if
required, to save room.
At right angles to the plane of the handle the usual spout is formed on the
flaring crown b, which is suitably perforated. At a point diametrically opposite to
the spout is arranged a small tube e through which the steam escapes as soon as it
is generated within the pot, its escape being a sign of the boiling of the water,
and consequently of the coffee being ready.
To the cylindrical edge g¹ of the lid or cover which enters the crown or
shoulder 6 of the coffee-pot is fitted a ring or band h to which the filter, preferably
made of fabric is sewn or otherwise attached. The cylindrical edge 91 of the lid
is perforated at g2 (Figs. 3 and 4) which perforation when the lid is in its proper
place, coincides with the spout the ring or band being correspondingly notched.
A pin, arrow, or other mark o on the lid, facilitates this adjustment of the opening g*
in relation to the opening f of the vessel.
The filter m is as before stated preferably made in the shape of a bag of suitable
fabric and stitched or otherwise secured to the ring h, its bottom m¹ being practically
of the same diameter as is the pot a within. The length or depth of the bag m of
course depends on the size of the coffee-pot.
Into the filter thus constructed is inserted the perforated diaphragm or plunger p,
the openings being somewhat in the shape of those shown at p¹. This diaphragm
is secured to the end of the rod n passing through the lid g, which is provided for
the purpose with a small tube or guiding sleeve 9', and externally the said rod
carries a suitable knob n' for its convenient operation.
To facilitate the adjustment or removal of the lid g, it may be moreover also
provided with a bow or yoke-shaped handle r.
The operation is as follows,-
While out of use the lid g supports the ring hand with it the filter m, so that an
air-tight joint is formed.
When it is desired to make coffee or tea the lid and then the filter are removed.
The ground coffee or the tea is placed on the bottom of the vessel a and the
required amount of water is poured over it, whereupon the filter and lid are
replaced, the former retaining its folded up position, as shown in Fig. 3.
The coffee-pot with its contents is then placed on a fire, gas stove or the like,
and left there until the water boils, which as soon as it does, becomes noticeable by
a small jet of steam escaping from the tube e. As soon as the steam is perceived
escaping, the coffee-pot should be removed from the fire and then by pressing upon
the knob n¹ the diaphragm or plunger p is pushed down thereby causing the filter
to become unfolded. As the filter m thus descends the liquid passes through the
meshes of the bag or pocket m in a very satisfactory condition and without any
appreciable loss of heat. The coffee or tea is then ready to be poured out, and
the vessel a may be entirely emptied.
To facilitate the folding and unfolding of the bag m the piston p is adapted
to be slightly turned, at the same time as it is pushed further inwards or
drawn back.
The cleaning of this coffee-pot is very easy as it may be readily taken to
pieces.

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is,―
1. The herein described coffee or teapot in which coffee or tea may be made
on the following principle: the ground coffee or the tea and the water are
placed together in the vessel closed by a suitable lid or cover the water boiled to
obtain the infusion which is filtered through a filtering bag of suitable fabric
pressed down from outside without the necessity of opening the pot substantially
as specified.
2. The coffee or tea-pot consisting of a vessel a provided with a spout a cover
or lid g to which is secured the filtering bag m made of suitable fabric the said
filtering bag m being pressed down in the liquid tea or coffee when the infusion is
ready the piston or plunger p having a rod n enabling the filtering bag to be folded
up or extended as required substantially as described and illustrated in the accom-
panying drawings.
Dated this 26th day of January 1893.
W. P. THOMPSON & BOULT,
Agents for the Applicant.