Improvements in Filter Presses.
Year: 1886

page_text: Date of Application, 11th Sept., 1886.
Complete Left, 13th June, 1887.
Complete Accepted, 15th July, 1887,
DI PULTICATION.
Improvements in Filter Presses.
I DANIEL KINNEAR CLARK of 8 Buckingham Street Adelphi in the County of
Middlesex Civil Engineer do hereby declare the nature of this invention to be as
follows:-
My Invention has for its object improvements in the construction of grooved
diaphragms of radial filter presses or such as act by the flow of the expressed liquid
along grooved surfaces of diaphragms, radially or partially radially towards the
circumference where it is discharged through passages or sub-channels formed around
the rim of the diaphragm.
My improvement consists in casting or otherwise forming the bearing rims or
borders of radially or practically radially grooved diaphragms in one piece with the
body of the diaphragm such rims heretofore having been separately formed and fixed
to the diaphragm. The expressed liquid, as it flows from the grooves is collected in a
circumferential channel or gutter at the base of the rim on each side of the diaphragm
from which it escapes into sub-channels formed within and through the raised rim,
and is thence discharged circumferentially outside the press.
According to another part of my invention a circular concentric (or substantially
concentric) collecting groove or gutter is formed on the face of the diaphragm
intercepting the radial or practically radial grooves. The expressed liquid flows
centrifugally from the inner grooves and centripetally from the outer grooves into
the circular gutter and is intercepted by it, in the manner of a catchwater drain,
whence it flows into sub-channels in the body of the diaphragm, by which it is
conducted through the raised rim to the outer circumference where it is discharged
through sub-channels formed in the rim.
More than one circular concentric collecting groove or gutter may be formed on the
face of the diaphragm if desired.
·תנוח
1000
TONGUE & BIRKBECK,
34, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: DESCRIPTION OF THE DRAWINGS.
Figure 1 shows a side elevation and Figure 2 a section (taken on the line A B
of Figure 1) of a diaphragm formed and constructed in accordance with my
improvements.
My improvements consist first in casting or otherwise forming the bearing rims or
borders a a of radially or practically radially grooved diaphragms b in one piece with
the body of the diaphragm such rims a a heretofore having been separately formed
and fixed to the diaphragm b. The expressed liquid as it flows from the grooves
in the shortest direction outwards is collected in the circumferential channel or
gutter c in the manner of a catch water drain at the base of the rim a on each face of
the diaphragm 6 from which it escapes into sub-channels c¹ formed within and through
the raised rim a and is thence discharged circumferentially outside the press. Part
only of the grooves on the diaphragm are shown which may be arranged either
radially or at a convenient moderate angle to the radius.
b
Figure 3 shows a side view and Figure 4 a section of a similar diaphragm to
Figure 1 corresponding parts being marked with similar letters of reference.
Figure 4 being a section through the line A. B. of Figure 3. Figure 5 an enlarged
section of an alternate arrangement on lines HI and M. N. Figure 6 enlarged
sections on lines A. B. and C. D. and Figure 7 an enlarged section on line E. F.
According to this part of my invention a circular concentric (or substantially
concentric) collecting groove or gutter c, is formed on the face of the diaphragm
intercepting the radial or practically radial grooves 6. The expressed liquid flows
centrifugally from the inner grooves and centripetally from the outer grooves b³,
into the circular gutter c and is intercepted by it in the manner of a catchwater drain
whence it flows into sub channels c¹ in the body of the diaphragm b, by which it is
conducted through the raised rim a to the outer circumference where it is discharged
through sub-channels formed in the rim.

page_text: More than one circular concentric collecting groove or gutter may be formed on
the face of the diaphragm if desired.
Having now particularly described and ascertained the nature of my invention and
in what manner the same is to be performed I would remark that I do not limit
myself to the exact details herein before shown and described but what I claim is :-
The improved construction arrangement and combination of radial or substantially
radial grooved or channelled surfaces of filter press diaphragms with one or more
circular collecting grooves or channels acting as catch-water drains and numerous
outflow sub-channels or openings around the rim of the diaphragm for the free
collection and escape of the filtered fluid substantially as described and represented
in the drawings hereto annexed.
TONGUE & BIRKBECK,
34, Southampton Buildings, London, W.C.,
Agents for the Patentee."