Year: 1899

page_text: I, WOLF DEFRIES, of 147, Houndsditch, in the City and County of London, E.C.,
Engineer, do hereby declare the nature of this invention to be as follows:
My invention relates to portable filters for the supply of a number of persons,
as, for example, field filters for military use.
In such filters it has been usual to place the filter in a basket. In filters
constructed according to my invention the basket forms the unfiltered-water
chamber of the filter, and is lined with any suitable waterproof material. My
filter is especially adapted to bacterial filtration by means of Pasteur tubes, and
is preferably furnished with an exhaust-pump, which is fitted on to a tube plate
through which the Pasteur tubes project into the filtered-water chamber. This
pump serves to draw water from the filters and deliver it into a collecting tube,
which is normally kept on the side of the lid of the basket, and may be so arranged
that when it is desired to use the filter, the collecting tube, which in such case
may be in the form of a loop with the delivery nozzles on one limb of it, may
swivel over so as to bring the limb with the nozzles outside the lid of the basket
without detaching the collecting tube. Several nozzles are provided on the
collecting tube, and are preferably constructed with a valve operated from below
by a spiral spring through a flat or conical shaped flange on the mouth-pieces of
the nozzle. This flange is pressed up by the mouth of the water-bottle which it is
desired to fill, compressing the spring and opening the valve, and when the
water-bottle is removed the valve closes again. By interposing a suitable gland
or sleeve I may arrange for the spring to be immediately replaceable in the
event of accident.
The filter-tubes may be kept apart by means of a cane grid supported on brackets
at a suitable height, the filter-tubes projecting through the grid. A portion
of the unfiltered-water chamber may be provided with a rough straining filter of
drill or any other suitable material, and the water being emptied into the main
filter through this straining filter undergoes a preliminary clarification.
This strainer may be made with a hemmed hollow margin round its upper
part, so that it can be slipped on and off canes or suitable horizontal supports,
washed, and replaced.

page_text: Improvements in and relating to Portable Filters.
I, WOLF DEFRIES, of 147, Houndsditch, in the City and County of London, E.C.,
Engineer, 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 portable filters for the supply of a number of persons,
as for example, field filters for military use. In such filters it has been usual
to place the filter in a basket.
Referring to the annexed drawings in which Fig. 1 is an elevation partly in
section shewing the basket open, and Fig. 2 is a transverse section through the
same, the basket A of my invention forms the unfiltered water chamber of the
filter, and is lined with any suitable water-proof material B. My filter is especially
adapted to bacterial filtration by means of Pasteur tubes, and is preferably
furnished with an exhaust pump C, which is fitted on to a tube plate D) through
which the Pasteur tubes E project into the filtered-water chamber. This pump
serves to draw water from the filters and deliver it into a collecting tube F
furnished with a reliet valve f and delivery nozzles y. The tube F is normally
kept on the side of the lid of the basket, and may be so arranged that when it
is desired to use the filter the collecting tube, which in such case may be in the
form of a loop with the delivery nozzles on one limb of it,, may swivel over so as
to bring the limb with the nozzles outside the lid of the basket without detaching
the collecting tube. For such purpose the tube F is strapped or similarly secured
by means of connections f' to the basket lid. Several nozzles, as before stated,
are provided on the collecting tube F, and are preferably constructed with a valve
operated from below by a spiral spring through a flat or conical shaped flange on
the mouth-pieces of the nozzle. This flange is pressed up by the mouth of
the water-bottle which it is desired to fill, compressing the spring and opening
the valve, and when the water-bottle is removed the valve closes again.
By interposing a suitable gland or sleeve I may arrange for the spring to be
immediately replaceable in the event of accident.
The filter-tubes may be kept apart by means of a cane grid supported on brackets
at a suitable height, the filter-tubes projecting through the grid. In lieu of inter-
lacing the canes, each row of the tubes may be tied by a cord interwoven between
them and secured to a cane rod. A portion of the unfiltered-water chamber may
be provided with a rough straining filter of drill or any other suitable material G,
and the water being emptied into the main filter through this straining filter
undergoes a preliminary clarification.
This strainer may be made with a hemmed hollow margin round its upper
part, so that it can be slipped on and off canes or suitable horizontal supports,
washed and replaced.
In lieu of the tube plate, the filtering tubes may be connected to a collector of
the usual form. One exhaust pump may operate two or more filters which can
be carried separately.
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:
(1). In portable filters, a collector for filtered water furnished with a distributing
nine having two or more delivery nozzles fitted with automatic spring valves

page_text: provided with flanges to be operated by the mouth of a water-bottle, for the
purposes and substantially as described.
(2). In portable filters, cane frames for the separation of filter tubes substantially
as described.
(3). In portable filters, a strainer of drill or other suitable fabric with hollow
edge for the purposes and substantially as described.
(4). A portable filter constructed, combined and arranged for the purposes and
substantially as described.
Dated
For the Applicant,
GEDGE & FEENY,
Chartered Patent Agents,
60, Queen Victoria Street, London, E.C.
For the Applicant,
GEDGE & FEENY,
Chartered Patent Agents,
60, Queen Victoria Street, London, E.C.