Year: 1887

page_text: Date of Application, 14th Dec., 1887
Complete Specification Left, 14th Sept., 1888
Complete Specification Accepted, 2nd Nov., 1888
I PROSPER AUGUSTE MAIGNEN, of 32 St. Mary-at Hill, in the City of London,
Technical Director of Maignen's Filtre Rapide and Anti-Calcaire Company, Limited,
do hereby declare the nature of this invention to be as follows:-
My invention relates to a novel construction of a filtering form or device whereby
I obtain a very large area of filtering surface within a very small compass, and with
very few fittings and parts; and to the combination therewith of any form of filter
case that may be desired.
My invention consists essentially in supporting a textile fabric in a corrugated form,
so as to fulfil the foregoing objects, and this 1 carry out in various equivalent ways.
For instance, I may take a cylinder or other convenient shape of textile fabric, (which
for water filtration is preferably asbestos) and alternately bulge the same by an inner
ring or shape and constrict by a smaller or outer ring or cord. In place of the
internal rings, however, I may have an internal packing of any suitable substance,
which need not possess filtering properties, to act as a support to the fabric, or I may
carry the said textile fabric in a corrugated form by a series of porous, perforated or
skeleton supports. These supports may be of any convenient shape to carry the textile
fabric in corrugations, which may be either horizontal or vertical or at any convenient
angle.
Or I may weave equivalents to the successive rings or supports in the textile fabric
itself, so as to cause it to maintain the required shape.
The water or other liquid may be drawn directly from the interior of the said
form by ascension or descension or laterally. Or I may introduce in it a central
collecting pipe which, when used in a perpendicular manner may act as an air pipe,
whilst the other end delivers the water.
It is obvious that my device may be either single or multiple, in which latter case
the collecting pipes will be led into a common delivery.

page_text: I may, upon the outer surface of my device, deposit filtering medium by subsidence
in the manner well known in respect of my "filtre-rapide." Again, I may pack the
space between my filtering device and the casing, which may be of any suitable form,
with any suitable filtering medium, such as carbon, sand or sponge.
Where the internal support of the fabric is material, this last may with great
advantage be of an elastic and porous character, so that the cloth may adapt itself
everywhere to the surface of the same, and thus prove a better filtering fabric than
when it is supported on an open frame or on perforated metal.
A fabric of more open
tissue can be thus employed, and a more uniform distribution of the filtering medium
thereon be obtained.
Dated this 18th day of December 1887.
FELL & WILDING,
1, Queen Victoria Street, London, E.C.,
Agents for the Applicant.

page_text: Improvements in Filters.
I, PROSPER AUGUSTE MAIGNEN, of 32 St. Mary at Hill, in the City of London,
Technical Director of Maignen's Filtre-Rapide and Anti-Calcaire Company, Limited,
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 a novel construction of a filtering device, whereby I obtain
a very large area of filtering surface within a very small compass, and with very few
fittings, and to the combination therewith of any form of filter case that may be
desired.
My invention consists essentially in supporting a textile fabric in a corrugated
form, so as to fulfil the foregoing objects, and this I carry out in various equivalent
ways.
In order, however, that my invention may be the better understood, I now proceed
to describe the same in relation to the drawings hereunto annexed, reference being
had to the letters and figures marked thereon. Like letters refer to like parts
throughout the drawings.
I may take a cylinder or other convenient shape of textile fabric (which for water
filtration is preferably asbestos) and alternately bulge the same by an inner ring or
shape A, which may be a double channelled and perforated diaphragm, as shown in
plan in figures 7 and 8, and in section in the other various figures, and constricted by
a smaller or outer ring or cord B. In place of the internal rings or diaphragms how-
ever, I may have an internal packing of any suitable substance which may or may not
possess filtering properties, to act as a support to the fabric. This form is shown in
figure 6, C being the packing referred to. Or I may carry the said textile fabric in a
corrugated form by a series of porous or perforated skeleton supports. These supports
may be of any convenient shape to carry the textile fabric in corrugation, for instance,
as shown in figures 7 and 8, and they may be either horizontal, vertical, or at any
convenient angle or angles. An alternative forin is shown in figures 16 and 17 where
the corrugations are vertical.
Similarly these supports inay be constructed of any suitable material, such for
instance as woven spiral wire, crossed wood or wickerwork or any other material or
form that may lend itself to the object required.
Or I may weave equivalents to the successive rings or supports in the textile fabric
itself, so as to cause it to maintain the required shape. The outer rings may on
occasion be enlarged as in figure 4, where they are shown in position, and figure 9,
where one is shown in plan. They thus not only serve as constrictors but by their
enlarged form afford proper support to my devices when used under pressure.
The water or other liquid introduced by the supply pipe E or directly into the
filtering vessel, may be drawn directly from the interior of the said frames by ascension
as shown in figures 1, 5, 12, 13, 14, 15, 16 and 17, or descension as shown in figures 2,
3, 4, 6, 10, 11, or laterally.

page_text: Upon the outer surface of my device, I may deposit filtering medium by subsidence
in the manner well known in respect of my "filtre rapide." Again, I may pack the
space between my filtering device and the casing G, which may be of any suitable
form, with any suitable filtering medium H, figures 1, 3, 10, 11, 12, 13, such as carbon,
sand or sponge.
It is obvious that my device may be either single or multiple, in which latter case
the collecting pipes from the various devices will be led into a common delivery.
This is shown in figures 14, 15, 16 and 17. In the first instance in figure 14 the
filtering devices are formed in nests K, the enlarged constricting ring being
preferably used, and from each set of nests K the liquid is led into a common
delivery pipe L. This arrangement of nests enables them to be attached by flanches
and nuts so that they may be readily removed separately for cleansing. Plan of this
is shown in figure 15. Where vertical corrugations are used, a suitable arrangement is
shown in figures 16 and 17 in elevation and plan respectively. Applications of my
device to constant water service are shown in figures 12 and 13.
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 of a filtering device consisting of a cloth such as asbestos with
alternate internal supports and external constrictions, presenting a corrugated surface
of large area within a small compass, substantially as described.
2nd. In such a filtering device the construction of the internal supports in the
form of ceramic or other plates with or without central orifices, and with both faces
corrugated with channels at right angles to each other so that their intersections make
apertures through the said plates, substantially as specified.
3rd. In such a filtering device the construction of the alternate internal supports
and external constricting rings in the form of corrugated ceramic or other plates the
outer constricting plate being provided with a central orifice of suitable size,
substantially as described in reference to figure 9.
4th. The general combination of a filtering device as hereinabove claimed with an
external case and attachments to form a high pressure filter, substantially as described
in relation to figures 1, 2, 5, 6 and 12.
5th. The general combination of a filtering device with alternate ceramic plates
supporting and constricting the fabric and permitting it to collapse within a suitablo
case to form a filter press, substantially as described in relation to figure 4..
6th. The combination of a series of filtering devices or presses as hereinabove
claimed connected by suitable pipe connections to a single main within a suitable case,
each series being readily removable by nuts or other similar device for cleansing or
examination, substantially as described in relation to figures 14, 15, 16 and 17.
7th. The combination with the above claimed filtering device of any form of casing
and subsidiary appliances, substantially as and for the purposes described.
Dated this 14th day of Santambor 1888
FELL & WILDING,
1, Queen Victoria Street, London, E.,
Agents for the Applicant.
FELL & WILDING,
1, Queen Victoria Street, London, E.,
Agents for the Applicant.