IMPROVEMENTS IN FILTERS to be as follows:-
Year: 1885

page_text: I HENRI FAVARGER of 76 Turnmill Street, Clerkenwell, in the County of
Middlesex, Aërated Water Engineer do hereby declare the nature of my invention
for "IMPROVEMENTS IN FILTERS to be as follows:-
"
My invention has reference to filters of the class in which the filtration takes
place through a bag of flannel, cotton, felt or other material.
The improvements mainly consist in attaching the bag to the supply pipe or
supply orifice by means of a watertight connection; in surrounding the bag by a
casing or tube to protect from air and dust the liquor which flows down the outer
surface of the filter bag; in means for preventing the liquor coming in contact
with the metal portions of the apparatus and in a special arrangement of water-
tight joint or connection between the bag and the supply pipe or supply orifice.
My improvements will be fully understood by the following description of a
filter in which they are embodied. To the end of the tap or pipe through which
the liquor to be filtered is supplied I screw or otherwise fix a horizontal dise
having on its under side a depending circular flange which forms a continuation
of the supply inlet. Concentric with this flange is a circular rib of the same depth
as the flange and of such diameter that it will fit easily within the metal ring
hereinafter referred to and thus act as a guide when the parts are being brought
together. Outside this circular rib is another circular rib of less depth and of a
diameter corresponding with that of a washer which is let into a recess of the ring
already mentioned. To the outside of this ring is fixed the upper end of a casing
or tube the lower end of which fits an opening in the top of the vessel which
receives the filtered liquor. The filter bag is attached at its upper end to a hoop
of larger diameter than the ring above referred to and the bag is dropped through
the ring the hoop retaining its upper edge outside the tube or casing. The edge of
the disc above described has slots to receive screwed eye bolts which are loosely
looped into other eye bolts screwed through the tube into the ring; the first named
eye bolts are fitted with nuts.
The bag having been dropped into place through the ring, the ring is brought up
against the under-side of the disc the eye bolts passing into the slots; the nuts are
then turned so that the washer in the ring is forced against the corresponding
circular rib before described, the bag being between them, and a water-tight joint
is thus made. The liquor to be filtered can then be supplied to the bag under
pressure or otherwise; the bulk of it will filter through the lower part and fall

page_text: directly into the receiving vessel while any which may filter through the upper
part of the bag will also find its way to the vessel and will meanwhile be protected
from dust and air by the tube or casing. The annular space between the circular
flange and the first described circular rib on the under-side of the disc constitutes
a sort of air-trap, the air which lodges therein preventing the liquor when the bag
is full from coming in contact with the disc. The ring has a depending lip which
keeps the upper part of the bag well away from the tube or casing so that the
liquor which passes through the said upper part will not come in contact with the
tube.
.
If the liquid to be filtered be very thin I may before fixing the bag to the disc,
pass a portion of the liquid mixed with magnesia, charcoal, paper pulp or other
filtering medium, repeatedly through the bag so as to obtain a deposit of such
medium upon the inside of the bag.
For some purposes it will be found advantageous to fit a number of my filters to
one supply tank in which case there will be tubular outlets at the bottom of the
tank to which discs constructed as before described are fixed, the filters being
attached to these discs by a water-tight connection in the manner explained.

page_text: I HENRI FAVARGER, of 76 Turnmill Street, Clerkenwell, in the County of
Middlesex, Aërated Water Engineer do hereby declare the nature of my invention
for "IMPROVEMENTS IN FILTERS" and in what manner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
My invention has reference to filters of the class in which the filtration takes
place through a bag of flannel, cotton, felt or other material.
The improvements mainly consist in attaching the bag to the supply pipe or
supply orifice by means of a water-tight connection; in surrounding the bag by a
casing or tube to protect from air and dust the liquor which flows down the outer
surface of the filter bag, in means for preventing the liquor coming in contact with
the metal portions of the apparatus; and in a special arrangement of water-tight
joint or connection between the bag and the supply pipe or supply orifice.
My improvements will be fully understood by the following description of a
filter in which they are embodied and by the annexed drawings which illustrate
the same. Figure 1 is a vertical section of the filter. Figures 2, 3 and 4 are
detail views. A is the tap or pipe through which the liquor to be filtered is
supplied; to the end of this tap or pipe I screw or otherwise fix a horizontal-disc B
having on its under-side a depending circular flange C which forms a continuation
of the supply inlet. Concentric with this flange is a circular rib D of the same
depth as the flange and of such diameter that it will fit easily within the metal
ring I hereinafter referred to and thus act as a guide when the parts are being
brought together. Outside this circular rib is another circular rib E of less depth
and of a diameter corresponding with that of a washer K which is let into a recess
of the ring I. To the outside of this ring is fixed the upper end of a casing or
tube J the lower end of which fits an opening in the top of the vessel which
receives the filtered liquor. G represents the filter bag; it is attached at its upper
end to a hoop H of larger diameter than the ring I and the bag is dropped through
the ring the hoop H retaining its upper edge outside the tube or casing J as seen in
Figure 1. The edge of the disc B has slots F to receive screwed eye-bolts M which
are loosely looped into other eye bolts L screwed through the tube J into the ring I;
the eye bolts M are fitted with nuts N. The whole apparatus is fixed in a
convenient position by means of the bracket O, or other suitable means of fixing it
may be adopted.
The bag G having been dropped into place through the ring I the ring is brought
up against the under-side of the disc B the eye bolts M passing into the slots F;
the nuts N are then turned so that the washer K is forced against the corresponding
circular rib E, the bag being between them, and a water-tight joint is thus made.
The liquor to be filtered can then be supplied to the bag under pressure or other-
wise, the bulk of it will filter through the lower part and fall directly into the
receiving vessel Q while any which may filter through the upper part of the bag
will also find its way to the vessel and will meanwhile be protected from dust and
air by the tube or casing J. The annular space between the circular flange C and
the circular rib D on the under-side of the disc B constitutes a sort of air trap, the
air which lodges therein preventing the liquor when the bag is full from coming in

page_text: contact with the disc. P is a depending lip on the ring I to keep the upper part
of the bag well away from the tube or casing J so that the liquor which passes
through the said upper part will not come in contact with the tube.
If the liquid to be filtered be very thin I may, before fixing the bag to the disc,
pass a portion of the liquid mixed with magnesia, charcoal, paper pulp or other
filtering medium, repeatedly through the bag so as to obtain a deposit of such
medium upon the inside of the bag.
For some purposes it will be found advantageous to fit a number of my filters to
one supply tank in which case there will be tubular outlets at the bottom of the
tank to which discs constructed as before described are fixed, the filters being
attached to these discs by a water tight connection in the manner explained.
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, in respect of filters of the class herein referred to, is
1. Attaching the filter bag to the supply pipe or supply orifice by means of a
water-tight connection, substantially as herein before described.
2. The tube or casing (J) which surrounds the filter bag as described and
protects from air and dust the liquor which flows down the outer surface of
the bag.
3. The flange C and rib D as described which by constituting a sort of air trap
prevent the liquor coming in contact with the disc B.
4. The depending lip P on the ring I as described to keep the upper part of the
bag well away from the tube or casing J.
5. The arrangement described consisting of the rib E on the disc B, of the
washer K in the ring I, of the slots F in the disc B, of the eye bolts L and M. and
of the nuts N for making a water-tight joint between the filter bag and the supply
pipe or supply orifice.
6. The combination of parts forming an improved filter as hereinbefore described
and represented in the annexed drawings.