IMPROVEMENTS IN FILTER PRESSES
Year: 1879

page_text: LETTERS PATENT to Henry Edward Newton, of the Office for Patents, 66,
Chancery Lane, in the County of Middlesex, Civil Engineer, for the Invention
of "IMPROVEMENTS IN FILTER PRESSES." A communication from abroad by
Albert Louis George Dehne, of Halle on Saal, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Henry Edward Newton at
the Office of the Commissioners of Patents on the 21st January 1879.
"
HENRY EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane, in the
County of Middlesex, Civil Engineer. 'IMPROVEMENTS IN FILTER PRESSES." [A
communication from abroad by Albert Louis George Dehne, of Halle on Saal, in
the Empire of Germany.]
This Invention relates to a novel arrangement of filter press, by the use of which
the liquor submitted thereto will be both filtered and clarified at one and the same
operation.
The Invention may be described as an improvement upon the filter press for
which Her Majesty's Letters Patent were granted to me, bearing date the 15th May
1878, No. 1958, in which filtering plates were used which extended to the full limits
of the transverse section of the press.
It is now proposed to use the same kind of filter plates, viz., plates made of wood
cut transversely of the grain, and presenting open pores to the liquid to be filtered;
but other filtering surfaces, such, for example, as clothes strained over perforated
plates of iron, may be used if preferred.
With four such filtering plates and three rectangular frames interposed between
them, a centre chamber is formed to receive the crude liquor which is to be filtered,
and on either side thereof a clarifying chamber. Against the outer side of the
two external filter plates are placed plates of iron grooved on their opposite
surfaces, which grooves lead to a common channel for discharging the filtered
liquid.
A group of chambers arranged as above described is placed on the outer side of
each grooved plate, and this arrangement is repeated (grooved plates being interposed
between the groups) until a sufficient length of press is obtained; the ends of the
press are then closed as usual.

page_text: Through the metal grooved plates, and through the filter plates, and through
internal lugs on the rectangular frames, two holes of corresponding diameter are
formed, which when brought into coincidence will constitute two continuous pas-
sages from end to end of the filter press: These passages are to be connected
respectively the one with the centre chambers (by lateral ducts), and the other with
the clarifying chambers, and both passages are to be connected with a force pump for
the purpose to be presently explained.
In operating with this novel arrangement of filter press, say, for the treatment of
saccharine liquor, the centre chambers are first filled with water by means of a force
pump, which water will serve as a resisting medium. Finely divided animal char-
coal in a semi fluid state is then pumped into the clarifying chambers for the
purpose of forming therein clarifying beds. The liquid entering with the charcoal
will be discharged through the filter plates next adjoining the grooved plates.
When clarifying beds have been thus prepared, the water in the centro chambers is
run out by cocks provided for the purpose, and these cocks being then closed the
pumping of the saccharine liquor into the centre chambers is cominenced and kopt
up until the filtering operation is completed.
The saccharine liquor will under pressure find its way through the porous plates
which forms the sides of the central chambers, leaving behind any solid vegetable
matter which may have entered with it into the press. This filtered liquor will now
pass through the carbon beds in the clarifying chambers, and ultimately find its
way through filtering plates into the channels of the grooved plates, and from these
channels the liquid will flow in a clarified state out of the press.
The like action will take place when other liquids are submitted to the press, the
liquid from each centre chamber flowing off in opposite directions, and becoming
clarified in its course through the press.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Henry Edward Newton in the Great Seal Patent Office on the 21st
July 1879.
A
HENRY EDWARD NEWTON, of the Office for Patents, 66, Chancery Lane, in the
County of Middlesex, Civil Engineer. "IMPROVEMENTS IN FILTER PRESSES."
communication from abroad by Albert Louis George Dehne, of Halle on Saal, in the
Empire of Germany.
This Invention relates to a novel arrangement of filter press, by the use of which
the liquor submitted thereto will be both filtered and clarified at one and the same
operation.
The Invention may be described as an improvement upon the filter press for
which Her Majesty's Letters Patent were granted to me, bearing date the Fifteenth
May, One thousand eight hundred and seventy eight, No. 1958, in which filtering
plates were used extending to the full limits of the transverse section of the
prosa.
It is now proposed to use the same kind of filter plates, viz., plates made of wood
cut transversely of the grain, and presenting open pores to the liquid to be filtered ;
but other filtering surfaces, such, for example, as cloths strained over perforated
plates of iron, may be used if preferred.
With four such filtering plates and three rectangular frames interposed between
them, three chambers are formed, the centre one to receive the crude liquor which
is to be filtered, and on either side thereof a clarifying chamber. Against the outer
side of the two external filter plates are placed plates of iron grooved on their
opposite surfaces, which grooves lead to a common channel for discharging the
filtered liquid.
A group of chambers arranged as above described is placed on the outer side of
each grooved plate, and this arrangement is repeated (grooved plates being interposed
between the groups), until a sufficient length of press is obtained, the ends of the
press being closed as usual.
In the accompanying Drawing, Fig. 1 represents the improved filter press in
longitudinal sectional elevation, and Fig. 2 in plan view; Figures 3 and 4 are
views of the rectangular frames, which serve to form respectively the centre and
side chambers; and Fig. 5 is a section drawn on an enlarged scale of a portion of
the filter press; a, a, are the rectangular frames which form the centre or main
chambers x; b, b, are the rectangular frames which form the side or clarifying
chambers ; c, c, are the metal plates grooved on both sides, which form the ends
of each group of chambers; and d, d, are the filter plates, made of wood or othor
suitable filtering material. One section in Fig. 1 shews filter plates made of cloth
strained over perforated plates of iron.
The end plates, which may be permanently affixed to the press framing, may bo
grooved on their inner faces, and thus render unnecessary the insertion of a grooved
plate between them and last filter plate at either end of the press.
Through the grooved plates c, c, and through the filter plates d, d, and also
through internal lugs on the rectangular frames, a, a, b, b, two holes of corresponding
diameter are formed, which, when brought into coincidence, will constituto two
continuous passages m, n, see Fig. 1, from end to end of the filter press. The
passage m is connected by lateral ducts shewn in dotted lines, Fig. 3, with the
centre chambers x, and the passage n is connected in the like manner (shewn by
dots in Fig. 4) with the clarifying chambers 2, 2, and both passages m, n, are to be
connected with a force pump for the purpose to be presently explained.
In operating with this novel arrangement of filter press, say, for the treatment of
saccharine liquor, the centre chambers x are first filled with water by means of a
force pump, which water will serve as a resisting medium. Finely divided animal
charcoal mixed with water to bring it to a semi-fluid state is then pumped into the

page_text: clarifying chambers 2, 3, and the liquid entering with the charcoal will be discharged
through the filter plates d, d, next adjoining the grooved plates c, c. This operation
is continued until the chambers s, s, are completely filled with charcoal When
clarifying beds have been thus prepared, the water in the centre chambor x is run
off through cocks provided for the purpose, and these cocks being then closed the
pumping of the saccharine liquor into the centre chambers ac is commenced and kept
up until the filtering operation is completed.
The saccharine liquor will under pressure find its way through the porous plates
d, d, which form the sides or walls of the centre chambers x, leaving behind any
solid vegetable matter which may have entered with it into the press. The filtered
liquor will now pass through the carbon beds in the clarifying chambers z, z, and
thence through the second filtering plates d, d, to the channels c¹ of the adjacent
grooved plates c, and from these channels the liquid will flow in a clarified state
into any suitable receptacle.
The like action will take place when other liquids are submitted to the press, the
liquid from each centre chamber flowing off in opposite directions, and becoming
clarified in its course through the press.
Having now described the nature of the said Invention for "Improvements in
Filter Presses," as communicated to me by my foreign correspondent, and having
explained the manner of carrying the same into effect, I wish it to be understood
that under the above in part recited Letters Patent I claim,-
The arrangement of filter press, substantially as herein shewn and described,
whereby the liquor submitted thereto will be both filtered and clarified at one and
the same operation.
In witness whereof, I, the said Henry Edward Newton, have hereunto set my
hand and seal, the Twenty-first day of July, in the year of our Lord One
thousand eight hundred and seventy nine.
TT T
NEITTON
Gol