IMPROVEMENTS IN FILTERING PRESSES FOR EXPRESSING THE LIQUID PARTS AND RETAINING THE SOLID PARTS OF SEMI-LIQUID SUB- STANCES
Year: 1871

page_text: LETTERS PATENT to William Brookes, of 62, Chancery Lane, London,.
in the County of Middlesex, Patent and Registration Agent, for
the Invention of "IMPROVEMENTS IN FILTERING PRESSES FOR EXPRESSING
THE LIQUID PARTS AND RETAINING THE SOLID PARTS OF SEMI-LIQUID SUB-
STANCES." -A communication from abroad by Ernest Jules Jean
Baptiste Desiré Du Rieux and Charles Edward Roettger, Civil
Engineers, both of Lille, in France.
PROVISIONAL SPECIFICATION left by the said William Brookes at the
Office of the Commissioners of Patents, with his Petition, on the
8th September 1871.
I, WILLIAM BROOKES, of 62, Chancery Lane, London, in the County
5 of Middlesex, Patent and Registration Agent, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN FILTERING PRESSES FOR
EXPRESSING THE LIQUID PARTS AND RETAININ THE SOLID PARTS OF SEMI-LIQUID
j

page_text: SUBSTANCES," (a communication to me from abroad by Ernest Jules
Jean Baptiste Desiré du Ricux and Charles Edward Roettger, Civil
Engineers, both of Lille, in France,) to be as follows:-
These improvements relate to filtering presses in which the solid parts
of semi-liquid substances are separated from the liquid or moist parts
thereof by the said semi-liquid substances being introduced under
pressure into chambers or spaces formed by joining together face to face
circular cast-iron frames, each of which frames consists of a grating of
bars encircled by a rim or ring of greater breadth than the said bars.
On each side of the said grating is attached a perforated metal plate,
over which plates are secured clothis, through which the liquid parts
of the semi-liquid substance pass off, leaving the solid parts to cake
between the cloths in the adjoining frame, from whence the said cakes
may be removed by separating the said circular frames one from
the other. A filtering press of this character is described in the
Specification of Letters Patent, No. 587, dated the 2nd of March
1867.
According to this Invention the circular frames forming the filtering
chambers are mounted on two horizontal shafts carried by upright
supports or brackets one at each end of the machine.." To the upper
shaft the frames are suspended by means of lugs formed on the tops of
the said frames, and the lower shaft passes through the centre of each
of the said frames. Each of the said circular frames consists of a grated
or perforated surface, or web encircled by a cylindrical rim projecting
from each side of the grated or perforated surface. On one side the
said rim is made wider, and partly of larger diameter than the other
side, so that when ready for use the smaller side of each rim is made to
engage in the larger side of the rim of the next contiguous frame, and
forms a tight joint without the use of india-rubber rings or other
packing. In the centre of each frame is a circular aperture or opening
of larger diameter than the shaft upon which it is mounted, and within
the said opening is fitted a short tube or ring, on' one side of which
tube is a flange or collar which bears upon the grated surface or web
of the frame, and a second collar or ring is screwed on to the other end
of the said tube, securing the said tube to the frame., Inside the said
tube are formed projections which rest upon the central shaft, the open
space between the said projections being for the introduction of the
semi-liquid substance into the machine, which semi-liquid substance is
1
"

page_text: introduced through a tube or pipe cast on the end support of the
machine, and forming an annular space round the end of the central
shaft. Upon cach side of the grated or perforated inner surface of the
frames is fixed an annular perforated plate of metal, or by preference a
disc of wire coiled so as to form an annular disc with space between
cach of the coils of the said wire for the passage of the liquid part of
the semi-liquid substance under operation. Above the said wire discs
or perforated plates a suitable cloth or other filtering medium is attached
in the following manner :-The said cloth or filtering medium is shaped
or cut out so as to cover the perforated plate or coiled disc upon cach side
of the web of the frame extending from the outside of the rim of the,
frame to the circular opening in the centre of the web thereof, where.
the cloths passing under from cach side aro joined or sewed together ·
(the central tube having being previously removed); the said central
tube is then replaced, and its moveable flange or ring screwed on, so as
to firmly hold and secure the said cloths to the web of the frame. The
said cloths are then spread over the perforated plates or wire discs, and
drawn over the rims of the frames on each side thereof, when, by
causing the said frames to engage one with the other as above men-
tioned, the said cloths will be firmly gripped and secured between the
rims thereof. The circular frames are each provided with a pipe or
channel underneath for the outlet of the liquid, which passes through
the cloths to the inner parts of the frames. The series of circular
frames are closed at one end by one of the end supports of the machine,
the inner surface of which support is shaped in a similar manner to
the inner surface of the next contiguous frame so as to complete the
chambers of the adjoining frame, and at the other end the said series
of frames is closed by a strong metallic plate also formed inside to
complete the next adjoining frame; and the said metallic plate is
pressed against the end of the series of frames so as to secure the
whole series of frames tightly together by a hand wheel on a screw
box upon the screwed end of the central shaft, which said screw box is
made to press against a moveable block abutting against the metallic
plate forming the end of the series of circular frames.
་

page_text: .
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Brookes in the Great Seal Patent Office
on the 7th March 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BROOKES, of 62, Chancery Lane, London, in the County of Middlesex,
Patent and Registration Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighth day of September, in the
year of our Lord One thousand eight hundred and seventy-one, in the
thirty-fifth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Brookes, Her special licence
that I, the said William Brookes, my executors, dministrators, and
assigns, or such others as I, the said William Brookes, my executors,
administrators, and assigns, should at any time agree with, and no others,
from time to time and at all times thereafter during the term therein
expressed, should and lawfully might make, use, exercise, and vend
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN FILTERING
PRESSES FOR EXPRESSING THE LIQUID PARTS AND RETAINING THE SOLID PARTS OF
SEMI-LIQUID SUBSTANCES," a communication to me from abroad by Ernest
Jules Jean Baptiste Desiré Du Rieux and Charles Edward Roettger,
Civil Engineers, both of Lille, in France, upon the condition (amongst
others) that I, the said William Brookes, my executors or adminis-
trators, by an instrument in writing under my, or their, or one of
their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to
be performed, and cause the same to be filed in the Great Seal
Patent Office within six calendar months next and immediately after
the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Brookes, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say:
These improvements relate to filtering presses in which the solid parts
of semi-liquid substances are separated from the liquid or moist parts

page_text: thereof by the said semi-liquid substances being introduced under
pressure into chambers or spaces formed by joining together face to face
circular cast-iron frames, each of which frames consists of a grating of
bars encircled by a rim or ring of greater breadth than the said bars.
On each side of the said grating is attached a perforated metal plate,
over which plates are secured cloths, through which the liquid parts
of the semi-liquid substance pass off, leaving the solid parts to cake
between the cloths in the adjoining frames, from whence the said cakes
may be removed by separating the said circular frames one from the
other of the character of that described in the Specification of Letters
Patent, No. 587, dated the 2nd of March 1867.
According to this Invention the circular frames forming the filtering
chambers are mounted on two horizontal shafts carried by upright
supports or brackets, one at each end of the machine. To the upper
shaft the frames are suspended by means of lugs formed on the tops of
the said frames, and the lower shaft passes through the centre of each
of the said frames. Each of the said circular frames consists of a grated
or perforated surface or web encircled by a cylindrical rim projecting
from each side of the grated or perforated surface. On one side the
said rim is made wider and partly of larger diameter than the other
side, so that when ready for use the smaller side of each rim is made to
engage in the larger side of the rim of the next contiguous frame, and
forms a tight joint without the use of india-rubber rings or other
packing. In the centre of each frame is a circular aperture or opening
of larger diameter than the shaft upon which it is mounted, and within
the said opening is fitted a short tube or ring, on one side of which
tube is a flange or collar which bears upon the grated surface or web
of the frame, and a second collar or ring is screwed on to the other end
of the said tube, securing the said tube to the frame. Inside the said
tube are formed projections which rest upon the central shaft, the open
space between the said projections being for the introduction of the
semi-liquid substance into the machine, which semi-liquid substance is
introduced through a tube or pipe cast on the end support of the
machine, and forming an annular space round the end of the central
shaft. Upon each side of the grated or perforated inner surface of the
frames is fixed an annular perforated plate of metal, or by preference a
disc of wire coiled so as to form an annular disc, with space between
each of. the coils of the said wire for the passage of the liquid part of

page_text: upon
the semi-liquid substance under operation. Above the said wire discs
or perforated plates a suitable cloth or other filtering medium is attached
in the following manner :-The said cloth or filtering medium is shaped
or cut out so as to cover the perforated plate or coiled disc cach
side of the web of the frame extending from the outside of the rim of the
frame to the circular opening in the centre of the web thereof, where
the cloths passing under from each side are joined or sewed together
(the central tube having been previously removed); the said central
tube is then replaced, and its movcable flange or ring screwed on so as
to firmly hold and secure the said cloths to the web of the frame. The
said cloths are then spread over the perforated plates or wire discs, and
drawn over the rims of the frames on each side thercof, when, by
causing the said frames to engage one with the other as above men-
tioned, the said cloths will be firmly gripped and secured between the
rims thereof. The circular frames are each provided with a pipe or
channel underneath for the outlet of the liquid, which passes through
The series of circular
the cloths to the inner parts of the frames.
frames are closed at one end by one of the end supports of the machine,
the inner surface of which support is shaped in a similar manner to
the inner surface of the next contiguous frame so as to complete the
chambers of the adjoining frame, and at the other end the said series
of frames is closed by a strong metallic plate also formed inside to
complete the next adjoining frame; and the said metallic plate is
pressed against the end of the series of frames so as to secure the
whole series of frames tightly together by a hand wheel on a screw
box upon the screwed end of the central shaft, which said screw box is
made to press against a moveable block abutting against the metallic
plate forming the end of the series of circular frames.
Figure 1 is a longitudinal view partly in section of a filtering press
constructed according to this Invention; Figure 2. is an end view of the
same; Figure 3 is a plan of the same, and Figure 4 is a separate view of 35
one of the circular frames forming the filtering chambers. The same

page_text: CUTECE
>.
A is a horizontal shaft carried by the upright supports or
standards B, B₁, one at each end of the machine. To the said shaft A
are suspended by means of lugs C, C, formed upon them the circular
frames D, D. Each of the said frames D, D, consists of a disc surface.
or web, upon each side of which are a series of circular ribs D¹, D¹,
forming between them channels for the liquid from the semi-liquid;
substance operated on to flow through, which liquid runs into the,
vertical channels D³, and from thence into the lower pipes E, from.
which it may be let out into the trough F, or other suitable receptacle..
The said dises or webs of the frames are each encircled by a cylindrical,
rim D³ projecting from each side of the web, which rims D³ may be.
made to abut one against the other, as shown in the Drawing at
Figure 1, or one side of the said rim may be made of larger diameter and.
wider than the other side, so that when placed side by side the smaller
side of cach rim will engage in the larger side of the rim of the next
contiguous frame, and form a tight joint without the use of india-rubber-
rings or other packing. In the centre of cach frame D is a circular
aperture D', which apertures may be traversed by a second shaft not
shown in the Drawing; and in that case a short tube or ring would be
fitted to the web of the frame by means of a collar on one side of the
said tube, and a second collar or ring screwed on to the other side of
the tube, which collars would embrace between them the web of the
frame, and inside the said tube projections would rest upon the said
central shaft, the open space between the said projections being for the
introduction of the semi-liquid substance into the machine, but it is.
preferred to omit the said central shaft, and to leave the circular
apertures D' entirely free for the passage of the semi-liquid substance.
into the machine. The said semi-liquid substance is introduced through
the pipe G on the end support B of the machine. Upon each side of
the webs or inner surfaces of the frames D is placed an annular
per-
forated plate of metal, or by preference a disc of wire coiled so as to
form an annular disc, with space between each of the coils of the wire
for the passage of the liquid parts of the semi-liquid substance under
operation. The said perforated plates or wire discs which are not repre-
sented in the Drawing extend over the face of the web of each frame
from the central apertures D' to the rims D³, as will be well understood;
.

page_text: and above the said wire discs or perforated plates suitable cloths or
other filtering mediums are attached as follows:-Two pieces of cloth
or fabric having been shaped so as to cover the face of the disc or web
of the frame with a hole at D' are joined together round the said hole,
so as to form a double covering for the web connected all round the
aperture D'. One half of the cloth having been passed through D' the
parts are drawn up all round the rim of the frame on each side, and
when the frames D are tightened one against the other the cloths are
all held firmly between the rims of the said frames. The series of
circular frames D, D, are closed at one end by the support B, the inner
surface of which support is shaped in a similar manner to the inner
surface of the next contiguous frame D so as to complete the chambers
of the said frame. At its other end the said series of frames D is
closed by a strong metallic plate H, also formed inside to complete
the chambers of the next frame, and the said plate H is pressed
against the series of frames D, D, so as to secure the whole series of
frames tightly together by a hand wheel I on the end of the screwed
shaft J, which screwed shaft J traverses a screw box formed in the
support B of the machine. K are pins screwed into each of the
lugs C, C, of the frames, and the points of which pins take into holes
in the next adjoining lug C to insure the correct position of the

page_text: completed by means of the hand wheel I, which is made to draw out
the shaft J, leaving the frames free to be separated.
Having now described the nature of this Invention and means
employed for carrying the same into effect, I wish it to be well
understood that I do not confine myself to the precise details herein-
before described and illustrated in the accompanying Drawing, as the
same may be varied without departing from the nature of the Invention;
but I claim as the Invention the general arrangement, adaptation, and
combination of the parts of filtering presses for expressing the liquid
parts and retaining the solid parts of semi-liquid substances, sub-
stantially as herein-before described and illustrated in the accompanying
Drawing.
Drawing.
In witness whereof I, the said William Brookes, have hereunto set
my hand and seal, this Fourth day of March, in the year of
our Lord One thousand eight hundred and seventy-two.
WILLIAM BROOKES. (L.S.)