IMPROVEMENTS IN PORTABLE FILTERS
Year: 1884

page_text: I, LEON ANTHONY WHITE of Clarendon Road, Manchester, in the County of
Lancaster, Silversmith do hereby declare the nature of my invention for
IMPROVEMENTS IN PORTABLE FILTERS to be as follows :—
The principal object of this invention is to construct a portable filter which shall
be exceedingly simple and be capable of being folded up into a small case for the
pocket, but the invention can also be applied with very slight modification to
filters of a larger size.
The invention consists chiefly in the combination of an inverted conical vessel
of india-rubber or other suitable elastic or collapsible material, with a removable
ball of charcoal, carbon or other suitable solid filtering material or substance.
The ball is wedged fast into the cone and the water passes through the ball
of carbon or filtering material and runs out, or is drawn out, through the apex of
the cone.
If the filter is intended to be hung up or suspended, the larger mouth of the
cone is provided with a rim of metal or other suitable material having a handlo
or other appendage by means of which it may be carried or hung, and in this case
the ball is mado small enough to fit near the apex of the cone; and the water,
(which is placed in the vessel above the ball) filters through the latter, and runs
out through a small hole in the apex ; but in cases where the filter is to be used by
suction I make the ball larger so as to fit near the base of the conc, and I attach a
small suction pipe to the apex of the cone.

page_text: I LEON ANTHONY WHITE of Clarendon Road Manchester in the County of
Lancaster Silversmith do hereby declare the nature of my invention for
IMPROVEMENTS IN PORTABLE FILTERS and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
The principal object of this invention is to construct a portable filter which shall
be exceedingly simple and be capable of being folded up into a small case for the
pocket but the invention can also be applied with very slight modification to
filters of a larger size.
The invention consists chiefly in the combination of an inverted conical vessel
of india rubber or other suitable elastic or collapsible material, with a removable
ball of charcoal carbon or other suitable solid filtering material or substance.
The ball is wedged fast into the cone and the water passes through the ball of
carbon or filtering material and runs out or is drawn out through the apex of
the cone.
One of the great advantages of this form of filter is that the filtering medium
can at any time be taken out and replaced and both it and the vessel can be
thoroughly cleansed.
Such being the nature and object of my said invention I will now proceed to
describe in detail the manner in which the same is to be or may be performed
or carried into practical effect and in order that the same may be clearly
understood I have hereunto annexed a sheet of drawings illustrative thereof
and have marked the same with figures and letters of reference corresponding
with those in the following explanation thereof.
Fig 1. in the annexed drawing illustrates my invention in its simplest form,
a, a being the inverted conical vessel of india rubber or other suitable clastic or
collapsible material. b, b the ball of carbon or filtering medium, or instead of a
ball I sometimes propose to use a conical plug of filtering medium preferably
concave at the top as shown at c, c Fig 2.
If the filter,is intended to be hung up or suspended the larger mouth of the cone
may be provided with a rim of metal or other suitable material and may have a
handle d, d or other appendage by incans of which it may be carried or hung and
in this case the ball bb or plug c, c is made small enough to fit near the apex of
the cone a, a and the water (which is placed in the vessel above the ball) filters
through the latter and runs out through a small hole in the apex, but in cases
where the filter is to be used by suction I make the ball b, b or plug c, c larger in
proportion so as to fit near the base of the cone a, a as shown and I attach or form
a small suction pipe e, e at the apex of the cone see Fig. 3.
A strap of india rubber or other suitable material may be used as at a' to
prevent the possibility of the ball or plug falling out of the cone, the said ball or
plug however could still be removed and replaced as desired.
The ball or plug should be pressed so far into the cone as to cause it to bulge
out as shown, in order to keep it in its place and so that the zone of contact
should be of a sufficient width to prevent the passage of water round the edges
and thus compel it to pass through the filtering medium. For this reason the part
where the ball or plug is fixed or wedged in, should be of soft flexible india rubber
but the upper part (say above the line f, fin Fig. 1.) may be made of any suitable
waterproof material.

page_text: It is also not necessary that this part should be conical as the upper part
(if rigid) might be made in the form shown at Fig. 4. which would be convenient
for filtering into an ordinary tumbler or other suitable vessel.
I would here remark that I do not desire to limit myself to any particular form
size or material of the body of the filter.
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
The manufacture of the acting portion thereof by the combination of a ball or
conical plug of carbon or other suitable filtering material or composition with a
cone of india rubber or other suitable elastic and waterproof material substantially
in the manner hereinbefore described and illustrated by the drawings annexed.
GEORGE DAVIES,
Agent for the Applicant,
4, St. Ann's Square, Manchester.