Improvements in Filters.
Year: 1893

page_text: Date of Application, 8th May, 1893
Complete Specification Left, 6th Feb., 1894-Accepted, 14th Apr., 1894
Improvements in Filters.
I, JEAN BOUVIER, of Montereau, in the Republic of France, Manager, do
hereby declare the nature of this invention to be as follows :-
This invention relates to improvements in filters and has for its object to provide.
a filter which advantageously substitutes the frame and cloth filters heretofore
specially used for the filtration of juice and syrup in sugar-houses and refinerys,
and which can also be used for any other industry, where it is required to separate
liquid from thick matter by decantation.
The principal feature of this invention is that, certain liquids which clarify by
decantation causing the separation of the suspended matter to take place
progressively across the filter beds, which are separated from each other by the
decanter trays, in such a manner, that liquid clarifies itself more and more in
circulating from one tray to the other that when leaving the last tray it is
completely clear.
To this end my improved filter consists of a receptacle of sheet or cast iron, in
the interior of which are superposed different filtering mediums, the number of
which is determined by the nature of the liquid to be filtered.
Each element is composed of galvanized wire gauze on which rests a bed of
rather thick filtering material, such as vegetal fibres, metal or wood fibres, or other
suitable material not forming a texture, but where the fibres are intermingled to
resist the circulation of the liquids in such a manner that the material in suspension
is retained.
This filtering matter is covered by a sheet iron disc in diameter corresponding
with that of the cylinder, which disc serves as a cover and retains the suspended
material arrested on the passage through the filtering material, the liquid passing
freely through the wire gauze. The said discs are formed with short tubes which
serve for running off the liquid from one tray to the other.
Each of the said elements is separated from the other, by supports arranged
between the same, leaving the necessary space for decantation.
A pressure screw turning in a nut fixed on the cover of the receptacle closes
the same hermetically. Pressure may also be exerted into this tray by other
screws or suitable means.
The liquid to be filtered can be introduced through a tube at the top or bottom,
a special tube being provided at the bottom for emptying.
It will be readily understood that the suspended material which disturbs the
liquid is retained in crossing the filter beds and decants into the trays in such a
manner that as the liquid circulates from one tray into the other its clearness
increases in proportion and the more trays crossed the more complete will be the
filtration.
The cleaning is effected in relieving the trays of the pressure and running water
through the apparatus in a reverse direction to the introduction of the material to
be filtered.
To facilitate the emptying of the filter without displacing the trays, another
form of my invention consists in arranging the filtering elements aforesaid
vertically between two metal grids, each filtering element being separate from
the other by a partition and wire gauze retaining the filtering element at the
bottom.
"
Each division is provided with a drain pipe which serves for the emptying of
the matter deposited on the inclined bottom of the receptacle.

page_text: The liquid is introduced into the filter by a tube at the side and leaves through
another at the bottom without the exertion of pressure.
When using pressure the filter is worked in a contrary manner.
In the latter case it is of advantage.to place against the outlet a metal gauze,
which clears the water of the suspended impurity.
Dated this 6th day of May 1893.
F: BOSSHARDT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
.Improvements in Filters.
I, JEAN BOUVIER, of 'Montereau, in the Republic of France, Manager, 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:-
This invention relates to improvements in filters and has for its object to provide
a filter which advantageously replaces the frame and cloth filters heretofore
specially used for the filtration of juice and syrup in sugar houses and refinerys
and which can also be used for any other industry where it is required to separate
liquid from thick matter by decantation.
This iuvention has for its object to effect the clarification of liquids by
decantation progressively by means of filter beds which are separated from each
other by decanter discs or trays, in such a manner that the liquid clarifies itself
more and more in running from one disc or tray to the other and that when leaving
the last disc or tray it is completely clear.
And in order that my invention may be more fully understood I have caused to
be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Fig. 1 is a vertical cross section of my improved filter.
Figs. 2 & 4 are longitudinal sections and Fig. 3 is a vertical cross section of
Fig. 2 showing two modifications of my invention.
In carrying out this invention and referring to Fig. I my improved filter consists
of a cylinder or receptacle A of sheet or cast iron in the interior of which are
superposed filtering beds B, C, the number of which is determined by the nature
of the liquid to be filtered.
:
Each bed is composed of galvanized wire gauze B on which rests a bed of
rather thick filtering material C, such as vegetable fibres, metal or wood fibres or
other suitable material not forming a texture but where the fibres are intermingled
to resist the circulation of the liquids in such a manner that the thick matter is
retained..
The filtering beds B & C are covered by a sheet iron disc or tray D in diameter
corresponding with that of the cylinder or receptacle A which disc or tray serves
as a cover and to catch the liquid running from the filter beds B & C above the
liquid passing freely through the wire gauze B. The discs or trays D are formed
with short tubes E through which the liquid runs from one disc or tray D to the
other.
...
The said beds are separated from each other by supports Farranged between
the same, leaving the necessary spaces for decantation. The cylinder or receptacle A
is hermetically closed by means of the cover I and the wing nut bolts 9.
A pressure screw G turning in a nut H fixed on the cover I serves to subject
the disc or tray to pressure which may also be created by other screws or other
suitable means.
The liquid to be filtered can be introduced - through a tube K at the top or

page_text: tube Lat the bottom, a special tube M being provided at the bottom for
emptying.
It will be readily understood that the thick matter of the liquid is retained by
the filter beds and the filtered part runs into the discs or trays D in such a manner
that as the liquid passes from one disc or tray into the other its clearness increases
in proportion and the larger the number of filter beds and discs or trays employed
the more complete will be the filtration.
The cleaning is effected by relieving the discs or trays D of the pressure and
running water through the apparatus in a reverse direction to the introduction of
the material to be filtered.
To facilitate the emptying of the filter without displacing the discs or trays D
another form of my invention consists in arranging the filtering beds aforesaid
vertically between two metal grids b, see Figs. 2 & 3, one separated from the other
by a partition a and wire gauze e retaining the filtering beds at the bottom.
Each partition a is provided with a drain pipe P which serves for the emptying
of the matter deposited on the inclined bottom S of the receptacle N.
The liquid is introduced into the filter through a tube O at the side and leaves
through another tube R at the bottom without the exertion of pressure.
When using pressure the filter is worked in a reverse manner.
In the latter case it is of advantage to place against the outlet R wire gauze c
which clears the water of the suspended impurity, see Fig. 2.
Fig. 4 shows the filtering medium employed in vertical wire gauze receptacles b¹
formed with handles and rendered removable for the purpose of permitting of
substitution without interrupting the working of the filter.
C
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim, is-
1st. A filter consisting of a receptacle, in the interior of which are employed in:
successive order a number of discs or trays D formed with short tubes F in con-
nection with a series of wire gauze partitions B between which is employed the
filtering material C composed of vegetable animal, galvanized iron, copper, or
other suitable fibres, substantially as and for the purpose set forth.
2nd. The inclined channels S in communication with drain pipes P, substantially
as and for the purpose set forth.
3rd. The removable filter receptacles b' formed with handles, substantially as
and for the purpose set forth.
Dated this 5th day of February 1894.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicant.