Improvements in Filter Apparatus.
Year: 1892

page_text: Date of Application, 8th Feb., 1892
Complete Specification Left, 15th Sept., 1892-Accepted, 14th Jan., 1893
Improvements in Filter Apparatus.
A communication from OESTERREICHISCHER VEREIN FÜR CELLULOSE-
FABRIKATION, of II Heumarkt, Vienna III, in the Empire of Austro-
Hungary.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention to be as follows:-
The apparatus forming the subject of this invention consists of a box or reservoir
made of wood in which a cylinder is arranged without a shaft upon four rollers
arranged at the terminal walls of the box.
This filtering cylinder is hollow and consists of its own two terminal discs or
walls provided with hollow journals passing through the terminal walls of the box.
One of these tubular journals has a less clear inner diameter than the other which
besides is provided with a flange. Upon the larger journal is also mounted the
driving-pulley by which through the medium of a strap rotary motion is imparted
to the cylinder.
Each of the hollow journals is fitted within a bearing or socket which in
conjunction with a collar provided on the journal itself and with leather or
equivalent packing bands form an air-tight packing.
The packing hands each of which covers about of the circumference of the
tubular journal to which it is applied, is provided at both ends with a screw
passing through eyes on the wall of the box. The bands may thus be more tightly
stretched if required by tightening these screws by means of nuts so that a more
perfect packing is obtained at the joints of the hollow journals.
The two end-plates of the cylinder are connected by braces or screw-rods capable
of properly strengthening the cylinder.
The external wall or casing of this filtering cylinder is made of perforated sheets
of metal, over which is stretched fine wire-gauze.
Within and through the cylinder is obliquely arranged a trough or tray for
continuously removing the impurities.
This tray is retained in position by supporting brackets one of which is arranged
at the inlet end of the box and the other at the opposite end above the refuse-
collecting trough.
To facilitate the removal of the tray from the cylinder when required the said
tray is made up of two parts joined by a hinge, the width of the tray being so
proportioned that when it is folded together it may readily be removed through the
journal or tube.
Above the journal is arranged a perforated pipe adapted to supply water in the
form of spray.
The operation of the apparatus is as follows,-
The water or liquid to be filtered is conveyed into the cylinder through a pipe,
after passing through the netting which envelops the cylinder externally, it passes
in a purified condition into the surrounding box or reservoir whence it is discharged
through a pipe either for immediate use or with a view to being submitted to
another more thorough filtering operation.
All the impurities floating or in suspension in the liquid thus treated remain in
the interior of the cylinder and, as the cylinder slowly revolves, they are
intercepted by shelves arranged on the inner periphery of the cylinder or by a
wire-gauze frame and thereby raised. When the impurities are thus brought to
D77

page_text: the highest point by the rotation of the cylinder they fall down upon the tray and
are continuously carried away by the drops of water which accompany them.
Impurities of a slimy nature such as sea-weeds which cannot be removed from
the cylinder by simply being allowed to drop down upon the tray may be raised
to the lower edge of the tube or journal by temporarily arresting the flow of water
through the cylinder and then washed away through the flanged end and caused to
descend into the trough.
The discharge of the purified water is so regulated that the cylinder as it revolves
is constantly immersed in water. Besides the sieves may if necessary be cleaned
with the assistance of the spray from the pipe.
Dated this 9th day of February 1892.
ALFRED J. BOULT,
Chartered Patent Agent.
COMPLETE SPECIFICATION.
Improvements in Filter Apparatus.
A communication from OESTERREICHISCHER VEREIN FÜR CELLULOSE-
FABRIKATION, of II Heumarkt, Vienna III, in the Empire of Austro-
Hungary.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Member of the Institution of Mechanical Engineers, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
The apparatus forming the subject of this invention of which Figure 1 of the
accompanying drawings is a vertical section; Figure 2 a cross-section and Figure 3
a. horizontal section, consists of a box or reservoir a made of wood, in which a
cylinder 6 is supported without a shaft, upon four rollers c arranged at the terminal
walls of the box.
This filtering cylinder is hollow and consists of its own two terminal discs or
walls 6 provided with hollow journals 663 passing through the terminal walls of
the box. One of these tubular journals 6' is of smaller internal diameter than the
other 6, which besides is provided with a flange d. Upon the larger journal 6³ is
also mounted the driving-pulley e by which through the medium of a strap rotary
motion is imparted to the cylinder.
Each of the hollow journals 6 6 rotates within a bearing or socket ffl which in
conjunction with a collar provided on the journal itself, and with the leather or
equivalent packing bands g form an air-tight packing.
The packing bands 9 each of which covers about of the circumference of the
tubular journal to which it is applied, is provided at both ends with screws h h¹
passing through eyes on the wall of the box (Figures 1 and 2). The bands
may thus be more tightly stretched, if required, by tightening these screws by
means of nuts, so that a more perfect packing is obtained at the joints of the hollow
journals 6363.
The two end-plates 6 of the cylinder are connected by braces or screw-rods i
capable of properly strengthening the cylinder.
The external wall or casing 6 of this filtering cylinder is made of perforated
sheets of metal, over which is stretched fine wire-gauze 6". An indiarubber or
equivalent packing ring & surrounds the cylinder at each end of the wire gauze.
Within, and through, the cylinder is obliquely arranged a trough or tray m for
continuously removing the impurities.
This tray which may be constructed of sheet metal or other suitable material is
retained in position by the supporting brackets n n¹ one of which is arranged at the
inlet end of the box a, and the other at the opposite end, above the refuse-collecting
trough o.

page_text: To facilitate the removal of the tray m from the cylinder when required, the
said tray is made up of two parts joined by a hinge, the width of the tray being so
proportioned, that when it is folded together it may readily be removed through the
journal or tube b³.
Above the cylinger is arranged a perforated pipe p adapted to supply water
in the form of spray.
The operation of the apparatus is as follows:-
The water or liquid to be filtered is conveyed into the cylinder through the
pipe R; after passing through the netting which envelops the cylinder externally,
it passes in a purified condition into the surrounding box or reservoir, whence it is
discharged through the pipe R¹ either for immediate use or with a view to being
submitted to another more thorough filtering operation.
All the impurities floating or in suspension in the liquid thus treated remain in
the interior of the cylinder and, as the cylinder slowly revolves, they are intercepted
by shelves r arranged on the inner periphery of the cylinder, or by a wire-gauze
frame, and thereby raised. When the impurities are thus brought to the highest
point by the rotation of the cylinder, they fall down upon the tray and are
continuously carried away by the drops of water which accompany them.
Impurities of a slimy nature, such as sea-weeds which cannot be removed from
the cylinder by simply being allowed to drop down upon the tray, may be raised
to the lower edge of the tube or journal 6ª by temporarily arresting the flow of
water through the cylinder, and then washed away through the flanged end d and
caused to descend into the trough o.
The discharge of the purified water is so regulated, that the cylinder, as it
revolves is constantly immersed in water. Besides, the sieves may if necessary be
cleaned with the assistance of the spray from the pipe p.
Having now particularly described and ascertained the nature of the said inven-
tion as communicated to me by my foreign correspondents, and in what manner the
same is to be performed, I declare that what I claim is :-
1. In water filtering apparatus a cylinder formed by a perforated casing such
as 6 6 rotating in a box and having arranged at its interior a folding tray such
as m for removing the impurities which have remained in the cylinder and which
are conducted by the shelves r rotating with the casing into the discharge tray
substantially as described and illustrated in the accompanying drawings.
2. In apparatus such as characterized in Claim 1 the packing of the cylinder
against the interior of the box by means of adjustable leather rubber or equivalent
belts or bands such as g substantially as described and illustrated in the accom-
panying drawings.
Dated this 14th day of Sentember 1892.
ALFRED J. BOULT,
Chartered Patent Agent.