IMPROVEMENTS IN FILTERING APPARATUS
Year: 1882

page_text: LETTERS PATENT to Edmund Edwards, of the firm of Edwards and Co:-
Patent Agents and Engineers; of 40, Southampton Buildings Chancery Lane
in the County of Middlesex for an Invention of "IMPROVEMENTS IN
FILTERING APPARATUS" A communication to him from abroad by Nicolas
Antoine Basile Chevallot of Paris in the Republic of France
PROVISIONAL SPECIFICATION left by the said Edmund Edwards at the
• Office of the Commissioners of Patents on the 9th October 1882.
EDMUND EDWARDS, of the firm of Edwards and Co-Patent Agents and
Engineers, of. 40, Southampton Buildings, Chancery Lane, in the County of
Middlesex "IMPROVEMENTS IN FILTERING APPARATUS" [A communication to
him from abroad by Nicolas Antoine Basile Chevallot of Paris in the Republic
of France]
This invention relates to apparatus used for filtering liquids, and it consists of
a reservoir of suitable capacity holding the liquid to be filtered and having at its
lower part a pipe provided with a cock by which the liquid can be admitted into
the filtering apparatus which is arranged inside a suitable vessel at a lower level,
from which vessel the filtered liquid flows through a pipe also provided with a cock
into a receiving vessel the lower part of which is fitted with a cock from which
the liquid can be drawn off into bottles or other vessels, the last named vessel being
raised upon feet sufficiently high for the purpose.
The upper reservoir and the filtering vessel are supported by any convenient
frame or stand, and all the three vessels are closed by moveable covers.
The filtering apparatus in the second vessel consists of a cylinder of suitable
diameter, on each of the two opposite ends of which is fitted a pair of perforated
plates or gratings of different diameter, and the filtering material preferably cotton
wool is placed between each pair of plates or gratings, the smaller one of which
fits into a sufficiently deep recess in the end of the cylinder, whilst the outer plates
are held against the wool or other filtering material by means of bolts passing
through lugs at their edges outside the cylinder, and provided with wing nuts by
which they can be tightened up. The filtering cylinder thus fitted is held by one
or more screws inside the vessel, and an opening into it at its upper side com-
municates with the pipe from the reservoir above from which the liquid enters into
the cylinder whence it passes through the filtering material and perforated plates
or gratings at each end.
Any suitable filtering material may be used, and the apparatus may be constructed
of any suitable material and of any desired form or dimensions.

page_text: 1
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Edmund Edwards in the Great Seal Patent Office on the 9th April
1883.
"
EDMUND EDWARDS, of the firm of Edwards and Co:- Patent Agents and
Engineers, of 40 Southampton Buildings, Chancery Lane, in the County of
Middlesex "IMPROVEMENTS IN FILTERING APPARATUS A communication to
me from abroad by Nicholas Antoine Basile Chevallot of Paris in the republic
of France
↑
$
This invention relates to apparatus used for filtering liquids, and it consists of
in reservoir of suitable capacity holding the liquid to be filtered and having at its
lower part a pipe provided with a cock by which the liquid can be admitted into
the filtering apparatus of the kind hereinafter described which is arranged inside
à suitable vessel at a lower level, from which vessel the filtered liquid flows
through a pipe also provided with a cock into a receiving vessel the lower part
of which is fitted with a cock from which the liquid can be drawn off into bottles
or other vessels, the last named vessel being raised upon feet sufficiently high for
the purpose.
.
The upper, reservoir and the filtering vessel are supported by any convenient
frame or stand, and all the three vessels are closed by moveable covers.
The accompanying drawing, which is in illustration of the invention, represents
the apparatus arranged and used for the purpose of filtering liqueurs. In figure 1
a is a vessel, or reservoir of any suitable capacity holding the liqueur which is to
be filtered. At the bottom of this vessel is placed a pipe b provided with a cock c
through which the liqueur passes through a pipe into the inside of the filtering
device arranged in the vessel a', whence the filtered liqueur flows by a pipo and
cock b¹ into the receiving vessel all which is also furnished with a cock b. The
vessel is raised upon feet p in order to facilitate the bottling of the filtered
liqueur. The vessel a¹ and the reservoir a are placed upon any suitable frame
or stand as shewn, and all the three vessels are closed by moveable covers.c.
The filtering device consists of a circular frame d (arranged and fixed vertically
in the vessel a) figures 2 and 3, on the two opposite faces of which frame are
'fixed two gratings or perforated plates e, f, and e, f, of different diameters; and
between the two grates e, f, and e¹, f', respectively, is placed a suitable filtering
material, preferably cotton wool.
A central bolt h passes through the centre of the gratings: e, f, and el, f¹, in a
shouldered socket g, the two ends of the bolt extending somewhat beyond the
grates e, f, and e, f, one end terminating in a claw / having three arms, and the
other end passing, through a washer / having three similar arms, and ending in
a screw fitted with a winged nut 1, so that by tightening the nut more or less
a uniform pressure can be obtained over the whole surface of the gratings.
The two gratings f, el are fitted closely against a shoulder in the circular framo d,
which latter has at each side a circular extension i serving to retain and press the
.cotton wool which passes the two gratings e, f. Instead of one central bolt two
or more external bolts may be used.
In the vessel a is arranged preferably a straining device shewn in figures 5, 6,
and 7. It is formed of two curved gratings or perforated plates m, n, between
which cotton wool is placed. These two plates are moveable but held together by
a. bolt or fastening at o. p.
The strainer thus arranged is fitted into the vessel a between the two. ribs q, r
soldered or otherwise fixed vertically in the vessel for its full depth, so that the

page_text: strainer is in front of the opening through which the liqueur flows into the filtering
vessel, its object being to strain the liqueur contained in the vessel a, retaining its
syrupy parts and thus allowing a larger quantity to be filtered through the filtering
device described.
Figure 4 shows a modified application of the circular filtering device already
described. The filtering gratings are shewn fixed by means of a nut v upon a cross
bar s arranged inside a funnel.
I do not confine myself to the precise form and arrangement of the several parts
of the apparatus described and shewn, which, may be modified to suit varying
circumstances, but having now described the invention and the manner in which
it is to be performed I claim :-The method of arranging cotton wool or other
fibrous filtering material between two gratings, substantially in the manner
described and shewn in the drawing. Also in combination with such filtering
apparatus so arranged, the strainer in the upper vessel constructed and arranged
substantially in the manner described and shewn in the drawing.
In witness whereof, I the said Edmund Edwards, have hereunto set my hand
and seal this 9th day of April in the year of our Lord 1883.