IMPROVE- MENTS IN THE CONSTRUCTION OF FILTERS
Year: 1875

page_text: LETTERS PATENT to Henry Bernoulli Barlow, of Manchester, in the
County of Lancaster, Patent Agent, for the Invention of "IMPROVE-
MENTS IN THE CONSTRUCTION OF FILTERS."-A communication from abroad
by Nicolas Joseph Galland, of Paris, France, Engineer.
Sealed the 12th May 1876, and dated the 21st December 1875.
PROVISIONAL SPECIFICATION left by the said Henry. Bernoulli
Barlow at the Office of the 'Commissioners of Patents, with his
Petition, on the 21st December 1875.
I, HENRY BERNOULLI BARLOW, of Manchester, in the County of
Lancaster, Patent Agent, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN THE CONSTRUCTION OF FILTERS," a commu-
nication to me from abroad by Nicolas Joseph Galland, of Paris, France,
Engineer, to be as follows:-
This improved filter is particularly adapted for filtering wort and beer.

page_text: The filter consists of a cast-iron chest having at each side a passage
for the admission of the liquid to be filtered and two passages below for
the discharge of the filtered liquid; there is also a passage above for
the rinsing out water.
The filtering surfaces consist of a series of sheet metal frames covered
with flannel or other suitable porous material, and these frames are
secured by air-tight sockets to the bottom of the chest.
The liquid to be filtered is conveyed into the spaces between the
filtering frames from the side passages through holes in the sides of the
chest, and it escapes into the discharge passages through the sockets
referred to.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry Bernoulli Barlow in. the Great Seal Patent
Office on the 9th June 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
BERNOULLI BARLOW, of Manchester, in the County of Lancaster, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-first day of December, 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 suc-
cessors, give and grant unto me, the said Henry Bernoulli Barlow,
Her special licence that I, the said Henry Bernoulli Barlow, my exe-
cutors, administrators, and assigns, or such others as I, the said Henry
Bernoulli Barlow, 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 THE CONSTRUCTION OF FILTERS," a com-
munication to me from abroad by Nicolas Joseph Galland, of Paris,

page_text: France, Engineer, upon the condition (amongst others) that I, the
said Henry Bernoulli Barlow, my executors or administrators, 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 Henry Bernoulli Barlow, 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 (that is to say) :
:-
This improved filter is particularly adapted for filtering wort and beer,
as its action is continuous and the air is excluded during the process,
but it may be employed for other purposes.
The filter consists of a cast-iron chest having at each side a passage
for the admission of the liquid to be filtered and two passages below for
the discharge of the filtered liquid; there is also a passage above for the
rinsing out water.
The filtering surfaces consist of a series of sheet metal frames covered
with flannel or other suitable porous material sufficiently fine to allow
of the use of flour of malt and other fecula in the manufacture of beer,
and these frames are secured by air-tight sockets to the bottom of the
chest.
The liquid to be filtered is conveyed into the spaces between the
filtering frames from the side passages through holes in the sides of the
chest, and it escapes into the discharge passages through the sockets
referred to.
1.
-
At one end of the chest is hinged a door to give access to the interior
for cleaning or repairing the filter frames.
And in order that this Invention may be more fully understood I will
proceed to describe the accompanying Sheet of Drawings.
Fig. 1 is a sectional elevation of the press taken through the line 1, 2,
on Fig. 2, which represents a plan of the same; Fig. 3 is a transverse
section of the filter taken through the line 3, 4, on Fig. 4, which

page_text: represents a horizontal section of the same taken through the line 5, 6,
on Fig. 3.
Fig. 5 is a detached view of one of the filtering frames; Fig. 6 is the
reverse side of the same; and Fig. 7 is an enlarged view of one of the
sockets d.
A is a rectangular cast-iron chest containing the filtering frames c,
The chest is provided with the side passages B, B³, which are in com.
munication with a centrifugal or other pump, the object of which is to
force back the filtering liquid through the openings o. The pump is
connected to a reservoir to prevent injury by excess of pressure. The
chest A is also provided with the branch pipes C, C³, to receive the
filtered liquid. The filtering frames c are made below with a socket d
fitting into holes corresponding with the receivers. The sockets are
spaced at one-third of the width of the filtering frame c, so that the said
frames may be turned alternately, as shewn in Figs. 5 and 6, to bring
the socket ḍ above either one or the other of the receivers C, C¹.
The sockets d, shewn in Fig. 7, are very simple, and form perfect
joints with the bottom of the chest. The head r fits on the bottom of
the frame, and below is a shoulder p above the recess g, below which is
the stud k, which may be provided with two shoulders p¹, p², as shewn.
An india-rubber ring n is sprung into the recess g. By this means the
ring n is compressed between the bottom plate F and the shoulder p, and
makes a perfect joint, at the same time the frames c can be removed
with facility.
The filtering frames are covered with bags of flannel or other suitable
fine porous material of such a texture as will enable flour of malt or
other fecula to be used. The filtered liquid passes through a hole in the
head into the off pipes C, C¹.
2"
The filtering frames are placed in the chest so that the sockets are
arranged in quincunx, as shewn in Fig. 4.
}
The filtering frames can be put in their places or removed when the
end lid E is opened. This lid is hinged below, and it is secured by the
handles G, which take into catches g, as shewn in Fig. 2.
At the upper side of the chest A is the passage D, which is in com-
munication with the spaces between the filtering frames e through holes
shewn in Fig. 1. The passage D is connected to a cistern to supply the