Year: 1887

page_text: Date of Application, 15th Aug., 1887 .
Complete Left, 4th Feb., 1888
Complete Accepted, 9th Mar., 1888
We Tом COOкE Builder and WILLIAM HENRY BOYENS Engineer, Broughton
Astley, in the County of Leicester do hereby declare the nature of this invention to be
as follows:
The object of our invention is to provide in combination with a tea or coffee
pot or other similar brewing vessel an apparatus or contrivance to contain tea
leaves or other ingredients of which it is desired to make infusions by which
the substances may be separated from the liquid at any desired moment.
To carry out our invention we secure in a convenient position on the exterior or
interior of a tea pot or other similar utensil, but preferably at the back of same i.e. the
part opposite to the spout and to which the handle may be fixed, a cylindrical or other
shaped chamber of tin or other suitable metal the lower part of which opens into the
interior of the pot.
Fitting into and capable of being rotated within the outer cylindrical chamber may
be a removable cylinder of the same length as the outer cylinder and of which
preferably one third of the circumference of the lower part may be perforated. A
suitable plunger may be placed within the inner cylinder.
The apparatus above described is used as follows:-Having removed the plunger
and adjusted the inner cylinder containing the tea leaves so that the perforated lower
end looks into the interior of the teapot the plunger is replaced and the desired
quantity of boiling water is put into the teapot.
After the leaves have been immersed the desired length of time, the perforated inner
chamber may be half rotated within the outer cylinder thus separating the leaves from
the water and thereby avoiding the extraction or dissolution of tannic acid or other
objectionable products consequent upon the leaves being allowed to remain in the liquid
n unnecessary length of tinie.
Previous to the half rotatory motion of the inner cylinder just described, the plunger
may be made to descend upon the leaves and press the remaining liquid contained in
hem through the perforations into the teapot.

page_text: A suitable hook or tongue is secured on the upper part of the inner cylinder and lodges
under the rim of the outer cylinder thus enabling the plunger to be separately with-
drawn when desired. The inner cylinder may be rotated by means of the plunger at
the top of which is a suitable handle to enable it to be more readily turned or with-
drawn, the periphery being flattened to prevent it being independently rotated. The
teapot may be used in the ordinary way when desired.
Date : 15h low of A 1007
We, TOM COOKE, Carpenter and WILLIAM HENRY BOYENS, Engineer both of
Broughton Astley in the County of Leicester, do hereby declare the nature of this
invention and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The object of our invention is to provide in combination with a tea or coffee pot, or
other similar brewing vessel, an apparatus or contrivance to contain leaves or other
substances of which it is desired to make an infusion, by which the substances may be
separated from the liquid at any desired moment.
In tho accompanying drawings
Figure 1 represents an elevation of a teapot partly in section, shewing the applica-
tion of our invention.
Figure 2 is a plan on the line Y. Z. in Figure 1.
Figure 3 is an elevation of the removable perforated chamber or cylinder hereafter
described.
Figure 4 is a plan of the outer and inner chambers.
Figures, 5, 6 and 7 shew a modification of the foregoing.
A is a cylindrical chamber inade preferably of the same material as the teapot and
which may be fixed to the outside of the pot or formed integrally with it.
The lower part of the partition between the chamber and the pot is removed, thus
leaving an opening A' by which communication between the interior of the pot and
the chamber is effected.
B is a removable cylindrical chamber of suitable material, fitting into and capable of
being rotated within the outer chamber A..

page_text: The inner chamber B is perforated at its lower end to the extent of about one-third
of its circumference and for any required distance in the direction of its length as
shown in Figure 3.
A hook or tongue B¹ is formed on the upper part of the inner cylinder B and lodges
under the rim or flange A¹ round the top of the outer chamber A, a portion of the
rim A being cut away as shown in Figure 4 to enable the curved portion of the hook
to reach the underside of the rim.
Cis a plunger or piston of any suitable material, capable of working up and down
in the inner chamber B and of being removed therefrom when desired.
The lower end of the plunger may consist of a circular plato or disc as shewn in
Figure 1 or of a circular block, either solid, or rocessed on its under surface, or it may
be of any other suitable construction.
A cap or lid C¹ fits over the top of the outer chamber A and is provided with an
opening in its centre through which the rod of the plunger passes.
Our invention is used as follows ;-
Having adjusted the inner chamber B so that the perforations E in its lower end
are directed towards the interior of the pot as shewn in Figure 1, the cap C¹ and the
plunger C may be removed and the desired quantity of tea leaves placed within the
perforated inner chamber B, and the plunger and cap replaced.
The boiling water may now be poured into the pot and will saturate the leaves by
passing through the perforations in the inner chamber.
After the leaves have been steeped or immersed a sufficient length of time, so that
their aromatic properties are extracted, the plunger C may be depressed, and the
liquid remaining in the cylinder B squeezed out through the perforations into the
pot.
The cylinder B may now be half rotated within the outer chamber, by this means
placing the plain or unperforated portion of the inner chamber B so that it is directed
to the interior of the pot.
The leaves are now cut off from the liquid, consequently the extraction or dissolu-
tion of tannic acid or other objectionable products resulting from prolonged immersion
of the leaves is avoided.
The peripheries of the inner chamber B and the lower end of the plunger C may be :
flattened at B for the whole of their length (Figures 2 and 4) so that the plunger
cannot revolve, therefore, when it is desired to partly rotate the inner chamber B to
separate the leaves from the liquid, it is only necessary to turn the ornamental knob
at the upper end of the plunger or piston rod C.
When it is desired to remove the inner chamber from the outer chamber for the
purpose of emptying the leaves out of the former, the hook B' is brought round to the
point where the portion of the rim A' at the top of the outer chamber is removed as
shewn at D Figure 4 and the chamber drawn out.
Figure 5 is a section of a modification of our Invention showing the perforated
chamber G applied to the centre of the pot.
Figure 6 is a plan of the top of the pot.
Figure 7 is a plan of the plunger H the lower end of which is hollowed so that it
may cover the leaves when it is depressed in the perforated chamber G.
J is the lid having an opening in its centre to allow the rod of the plunger to move
freely up and down,
K. K are two lugs fixed upon the outside of the upper end of the perforated
chamber and fitting under the top of the pot for the purpose of preventing the
chamber from being withdrawn, when the plunger is being removed therefrom.
When the perforated chamber is placed inside the pot the lugs K K pass through
the openings LL; the chamber is then partly rotated to enable the lugs to get under
the top of the pot as shown by the dotted lines (Fig. 6).
The perforated chamber G is prevented from falling into the interior of the pot by
means of the flange or rim M.
The modification is used as follows:-
The plunger H and with it the lid J are removed from the pot and the leaves placed

page_text: within the perforated chamber G. The boiling water may now be poured upon the
leaves and will escape through the perforations into the pot.
The plunger may now be inserted within the perforated chamber, in the position
shewn by the dotted lines, the lid J being placed over the top of the chamber as in
ordinary teapots to prevent the escape of the steam.
After the leaves have been steeped a sufficient length of time, the plunger may bo
depressed in the perforated chamber, and the leaves covered by its hollow lower end
and thereby separating the leaves from the water.
The plunger H is constructed preferably fluted on its outer circumference as shown
at H in Figure 7 in order to allow the liquid to pass it, when it is depressed in
the chamber G.
Our invention may also be applied to all kinds of apparatus or utensils for making
tea and coffee, or decoctions or infusions of any other ingredients.
We may also employ two or more perforated chambers according to the size of the
vessel used, and the grating usually employed at the inner end of the spout of ordinary
tea or coffee pots, may be dispensed with.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
1. In a teapot or other similar vessel the combination with a removable chamber
such as B for containing the materials to be infused of a piston such as C for expelling
the liquid from the chamber substantially as described.
2. A teapot or other similar vessel divided into two compartiments communicating..
with each other through an opening such as A¹, one compartment being adapted
to contain a perforated cylinder such as B capable of revolving therein substantially as
and for the purpose herein described and illustrated in Figures 1. 2. 3 and 4 of the
accompanying drawings.
3. In a teapot or other similar vessel the combination with a perforated chamber
such as G of an inverted cup shaped or hollow piston such as H substantially as
and for the purpose herein described and illustrated in Figures 5 and 6 of the
accompanying drawings.
4. The complete teapot described and illustrated in Figures 1. 2. 3 and 4 of the
accompanying drawings.
5. The complete tea-pot described and illustrated in Figures 5 and 6 of the
accompanying drawings."
Dated this 3rd day of February 1888