Improvements in Apparatus for Filtering Perfumes, Tinctures, Essences, Cordials, and other Liquids.
Year: 1890

page_text: Date of Application, 6th Feb., 1890-Accepted, 19th Apr., 1890
COMPLETE SPECIFICATION.
Improvements in Apparatus for Filtering Perfumes, Tinctures,
Essences, Cordials, and other Liquids.
FRANCIS LAURANCE JOHNSTONE Northfield End Henley-on-Thames County of
Oxfordshire, Foreman Mineral Water Maker, 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:-—
My Invention relates to improvements in apparatus for filtering the insoluble
matter held in solution from various liquids such as perfumes, tinctures, essences,
cordials and the like, without loss of strength or aroma by evaporation so that they
will mix more perfectly with water, by enclosing them whilst filtering within air tight
vessels and pipes protected from atmospheric influence.
The various filters now in use are not air-tight, having open filtering funnels, or
liquid holders which allow the aroma and strength of such liquids above enumerated
to evaporate while filtering.
The said Invention consists of a vacuum pump made of tinned copper or other
suitable material and may be worked by hand, or foot power, the said pump being
connected by a pipe to an air vessel above same, a tap or cock being fitted to the
lower and upper parts of the said air vessel, at the top of the air vessel a pipe is
attached, the other end of which pipe is connected to the top of the lid or cover of a
cliquid holder, which said liquid holder has an internal perforated grid, above which
a suitable filtering medium is placed, the lower part of the said liquid holder has a
conical or funnel shaped outlet, connected to which is a bent or curved pipe in three
or more parts connected together by any suitable means, in which bent pipe is a
filtering cord or medium, the lower end of this pipe being connected to a globular,
Cspherical or other suitably shaped glass vessel containing a filtering medium such as
cotton cord, gun-cotton &c. the lower end of which glass filter is connected to a pipe
having a spiral or twisted formation, and connected at its lower end to any suitably
shaped vessel or tank into which the filtered liquid falls, and is drawn off therefrom
when required through taps or cocks.
In order that my Invention may be more readily understood and explained in detail
I have hereunto annexed a sheet of Drawings on which letters of reference are marked
For the purpose of illustrating my Invention I have shewn one method of
arranging the various parts, the vacuum pump in this example being worked by
hand..
The liquid to be filtered is poured into the liquid holder a having an hinged lid a
which is then closed and forms an air tight joint, one end of a pipe a³ being then
connected to the said lid a³, and the other end to the top of the air-vessel b the
vacuum pump c is then set in motion by means of handle which draws the air from
the filtered liquid receiver d having an air tight lid d², through the pipe d³ and
compresses the same into an air vessel b, the tap or cock 63 below the air vessel is then
closed or turned off and the cock 63 at the top of air vessel opened, the compressed
air passing from the said air vessel b, through the pipe a³ into the liquid holder a and
forces the liquid therein through filtering material contained in and supported by a
grid or strainer in the said liquid holder a and through other filtering material or
cord contained in the bent pipe at and glass vessel e it then passes through the coiled
or spirally bent pipe e' into the filtered liquid receiver d from whence it can be drawn
off when required through a tap or cock d'.

page_text: The liquid holder a, air vessel b, vacuum pump c and filtered liquid receiver d
being made of tinned copper, the several pipes a³, d³, a³, and e³ being made of tin or
tinned copper to prevent or avoid risk of poisonous contamination, the vessel e being
made of glass so as to enable the operator to watch or see the liquid during the
process of filtration.
The pipe a' being made in three pieces, and joined or fastened together in any
suitable manner, for convenience of placing the filtering medium therein, the spiral
pipe and the aforesaid pipe at are preferably bent as shewn so that any grit or other
matter contained in the liquid shall lodge in the bends of the same, as the more
difficulties the liquid has to overcome in its passage from the liquid holder a to the
filtered liquid receiver d the better as the liquid will be made brighter. Suitable
framing is provided for supporting liquid holder a and air vessel b, the filtered
liquid receiver d also being suitably supported.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. The construction and use of an apparatus for filtering and derisinising the
various liquids herein specified, in which compressed air is used for forcing the liquid
to be filtered through suitable filtering mediums, in the manner and for the purpose
herein substantially described, set forth and fully illustrated in the drawings hereunto
annexed.
2. The construction of an apparatus for filtering and derisinising the various liquids
herein specified, having air tight covers and connections, for the purpose herein
substantially described and set forth.
3. The apparatus composed of the various parts and materials herein specified,
which said parts when fitted or attached together, form a filtering and derisinising
apparatus to be used for the purpose and in the manner as herein substantially
described.
Dated this 6th day of February 1890.
GRAHAM & GRAHAM,
Agents for Applicants.