IMPROVEMENTS IN FILTER PRESSES
Year: 1875

page_text: LETTERS PATENT to John Bowing, of 2, Saint Michael's House,
Saint Michael's Alley, Cornhill, in the City of London, Manu-
facturing Chemist, for the Invention of "IMPROVEMENTS IN FILTER
PRESSES
"
PROVISIONAL SPECIFICATION left by the said John Bowing at the
Office of the Commissioners of Patents, with his Petition, on the
17th November 1875.
I, JOHN BOWING, of 2, Saint Michael's House, Saint Michael's Alley,
Cornhill, in the City of London, Manufacturing Chemist, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN FILTER
PRESSES," to be as follows:-
-
I construct a strong chamber or tank open at the top, and of such
size, shape, and material as is best adapted to the amount and nature of
the matter to be pressed. This I fill with the body requiring to be
filtered, and place therein partitions or diaphragms at short distances

page_text: apart, more or less, according as the water or other fluid leaves the
insoluble matter readily or otherwise. The top is then secured in its
place, and a force pump or other like machine is connected and is
caused to exert a pressure in the vessel or chamber by renewed charges
of the matter to be pressed. Such pressure causes the fluid to pass
along the diaphragms to the outer boundary of the tank from which it
escapes by means of passages, holes, or slits covered with any con-
venient material, as canvas, cloth, or the like. After the pressure has
been maintained a sufficient length of time the chamber is opened and
the dry precipitated matter is removed.
To aid the passage of the fluid over the surfaces of the diaphragms,
they may be preferably covered, partly or wholly, with cloth, linen, or
such material, similarly with the boundary walls of the chamber.
The arrangements of the various details may differ according to the
requirements of any particuliar case, but the novelty I claim is in the
discovery and application of the law, that if a mass of fluid containing
insoluble matter be intersected by surfaces of suitable material and
submitted to pressure the fluid will travel along such surfaces to any
outlet provided for it.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John, Bowing in the Great Seal Patent Office
on the 16th May 1876.
.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
BOWING, of 2, St. Michael's House, St. Michael's Alley, Cornhill, in
the City of London, Manufacturing Chemist, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventeenth day of November, in the
year of our Lord One thousand eight hundred and seventy-five, in
the thirty-ninth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said John Bowing, Her special
licence that I, the said John Bowing, my executors, administrators,
and assigns, or such others as I, the said John Bowing, my executors,
administrators, and assigns, should at any time agree with, and no
.

page_text: 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
FILTER PRESSES," upon the condition (amongst others) that I, the said
John Bowing, my executors or administrators, by an instrument in
writing under my hand and seal, 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
Scal Patent Office within six calendar months next and immediately
after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Bowing, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by the
following statement :—
I construct a strong chamber or tank open at the top and of such size,
shape, and material as is best adapted to the amount and nature of the
matter to be pressed. This I fill with the body requiring to be filtered
and place therein partitions or diaphragms at short distances apart, more
or less, according as the water or other fluid leaves the insoluble matter
readily or otherwise. The top is then secured in its place and a force
pump or other like machine is connected and is caused to exert a
pressure in the vessel or chamber by renewed charges of the matter to
be pressed. Such pressure causes the fluid to pass along the diaphragms
to the outer boundary of the tank, from which it escapes by means of
passages, holes, or slits covered with any convenient material, as
canvass, cloth, or the like. After the pressure has been maintained a
sufficient length of time the chamber is opened and the dry precipitated
matter is removed.
To aid the passage of the fluid over the surfaces of the diaphragms,
they may be preferably covered, partly or wholly, with cloth, linen, or
such material, similarly with the boundary walls of the chamber.
The arrangement of the various details may differ according to the
requirement of any particular case, but the novelty I claim is in the
discovery and application of the law, that if a mass of fluid containing
insoluble matter be intersected by surfaces of suitable material and sub-

page_text: °
provided for it.
In witness whereof, I, the said John Bowing, have hereunto set
my hand and seal, this Sixteenth day of May, in the year of our
Lord One thousand eight hundred and seventy-six.
Signed, sealed, and delivered, by
the said John Bowing in the
presence of
F. A. WHITMORE LOWE,
HENRY P. URQUHART,
Clerks to Messrs. Lane & Andrews,
Sol".,
32, Essex St.,
Strand.
JNO. BOWING. (L.S.)