Year: 1887

page_text: Date of Application, 3rd June, 1887
Complete Left, 23rd Feb., 1888
Complete Accepted, 23rd Mar., 1888
1, WILLIAM ROBERTSON, of the Square, Aberfeldy, Perthshire, Merchant, do hereby
declare the nature of this Invention to be as follows:-
This Invention comprises new or improved portable fittings for being applied to
tea-pots and coffee-pots to filter and retain the tea-leaves or granulated coffee while
being infused or prepared, and prevent them passing away when the liquid tea or
coffee is being used or emptied from the pots; and which will save much of the
present waste of these substances, while supplying a clearer or purer liquid tea or
coffee, without coating or corroding the pot, and giving better facilities for cleaning
the filter or strainer than has been the case with filters or strainers as heretofore
applied to tea or coffee pots.
The nature and novelty of my Invention consist in the use of a portable vessel to be
placed within a tea or coffee pot. This vessel is made of oblong, round, or other
shape to suit that of the tea-pot, and is preferably made of sheet metals such as sheet-
tin or other metals preferably electroplated, although it can also be made of clayware,
earthenware, or porcelain. This portable vessel is made of nearly the same depth as
the tea or coffee pot, but leaving a small space between its lower end and the inside
bottom surface of the tea-pot. The upper half of the vessel when made of sheet-
metal is made solid or without perforations and the lower half which is soldered or
otherwise attached to the upper part, is made of perforated sheet-tin, wire-gauze, or
other open interstices, with a new hinged or removable bottom, which is also perforated,
or made of wire-gauze. This vessel has a projecting flange formed on its upper end
to rest on a correspondingly shaped flange in the mouth or neck of the tea or
coffee-pot below the usual lid, and may have a ring or handle on its inner surface
for case in removing it from the pot.
When used for a coffee-pot the perforations or wire-gauze in the lower part of this
portable vessel, would be made much smaller, than when to be used for tea; to act as
a strainer and prevent the escape from it of the granulated coffee.

page_text: The tea or coffee would be placed in this portable vessel before it was inserted in
the tea or coffee-pot. The lower perforated or wire-gauze part of the vessel would
allow the hot water in the pot to percolate through and co-mingle with the solid tea
or coffee, but would filter and prevent the escape of the latter when pouring or
emptying out the infused or prepared liquid tea or coffee. While the new hinged or
otherwise removeable perforated bottom gives facility for cleaning out the vessel from
timo to time as desired.
Thi
LT1005

page_text: COMPLETE SPECIFICATION.
Improvements in and relating to Tea and Coffee-pots.
1, WILLIAM ROBERTSON, of the Square, Aberfeldy, Perthshire, Merchant, do hereby
declare the nature of my said Invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement in writing, reference being had to the accompanying Sheet of Drawings,
and to the letters and figures marked thereon, that is to say:
..t
My said Invention comprises new or improved portable fittings for being applied to
tea-pots and coffee-pots to filter and retain the tea leaves or granulated coffee while
being infused or prepared, and prevent them passing away when the liquid tea or
coffee is being used or emptied from the pots, and which will save much of the
present waste of these substances, while supplying a clearer or purer liquid tea or
coffee, without coating or corroding the pot, and giving better facilities for cleaning
the filter or strainer than has been the case with filters or strainers as heretofore
applied to tea or coffee-pots.
And in order that my said invention, and the manner of performing or carrying the
same into effect or practice may be properly understood, I have hereunto appended an
explanatory sheet of Drawings, in which the same reference letters are used to
indicate corresponding parts in both figures where shown.
Figure 1, is a sectional elevation of an oval tea pot A, as fitted with my new
portable filter or strainer B, B1, B2, complete. While Figure 2 is an end elevation of
the portable filter or strainer B, B1, B2, removed, from the teapot, at right angles to
that shown in Figure 1, and showing the hinged perforated "bottom B2, in its folded
down open position.
Referring to these Drawings:-The nature and novelty of my invention consist in
the use of a portable vessel B, B1, B2, to be placed within a tea or coffee-pot A. This
vessel B B1, B2, is made of an oval shape in horizontal section as shown in the
Drawings, but it might be of oblong round or other shape to suit that of the tea or
coffee-pot A, and is preferably made of sheet metal, such as sheet-tin or other sheet
metals, preferably electroplated, and it is also made of earthenware, clayware, or
porcelain. This portable vessel B, B1, B2, is made of nearly the same depth as the
tea or coffee-pot A, but leaving a small space between its lower end perforated
bottom B, and the inside bottom surface A', of the tea or coffee-pot A. The upper
half B of the vessel when formed of sheet-metal, is made solid, or without perforations,
and the lower half B³, which is soldered or otherwise attached at B" to the upper
part B, is made of perforated sheet-metal, wire-gauze or other open interstices with a
new hinged or removable bottom B², which is also perforated or made of wire-gauze.
This vessel B, B1, B2, has a projecting flange & formed on its upper rim to rest on a
correspondingly shaped flange a formed in the mouth or neck of the tea or coffee
pot A, below the usual lid a, a, which closes down upon this; and the strainer B,
would have a ring or handle 6 on its inner surface for ease in removing it from the
pot A.

page_text: When used for a coffee-pot the perforations or wire-gauze in the lower part B', of
this portable vessel, may be made much smaller than when used for tea; to act as a
strainer and prevent the escape from it of the granulated coffee.
The tea or coffee would be placed in this portable vessel B B1, B2, preferably before
it was inserted in the tea or coffee-pot A. The lower perforated or wire-gauze
part B1, B2, of the vessel would allow the hot water in the pot A, to percolate through
and co-mingle with the solid tea or coffee, but would filter and prevent the escape of
the latter when pouring or emptying out the infused or prepared liquid tea or coffee
which would have the substances thoroughly extracted and come off clear without the
tea leaves or granular coffee. While the new removable lid B2, is hinged at 62, and
secured to the vessel B¹, by a spring clasp at 63; or this lid B might be otherwise
attached to the lower perforated bottom B¹, and thus give facility for cleaning out the
strainer B B', from time to time, when removed from the tea or coffee-pot A. While
the spout A of the pot A, as well as the pot, can in this way be thoroughly brushed
and cleaned and thus prevent any corroding of the surfaces.
Although the portable strainer B, B1, B2, has only been shown applied to a tea-
pot A, in the Drawings, it can be similarly fitted to coffee pots, preferably having the
perforations made smaller to prevent the granulated coffee passing into the vessel A.
Instead of having the removable bottom B attached at the lower end, it may be fitted
at the side or other part of the portable strainer B, B¹, B².
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that what
I claim is
First. The constructing of tea and coffee pots with improved filtering or straining
vessels, all substantially as hercin described in reference to and shown in the
accompanying Drawings.
Second. In tea and coffee pots the construction and use of portable filters or
strainers with a hinged or removable bottom, or side door, substantially as and for
the purposes and advantages herein described in referenco to and shown in the
accompanying Drawings.
T: 09-1 of Toby 1900