Improvements in Filter Presses.
Year: 1890

page_text: Date of Application, 13th Jan., 1890
Complete Specification Left, 8th Oct., 1890--Accepted, 29th Nov., 1890
PROVISIONAL SPECIFICATION.
Improvements in Filter Presses.
We. JOHN BROCK, Alkali Manufacturer, British Alkali Works, Widnes Lancashire
and THOMAS MINTON Works Manager, British Alkali Works Lancashire do hereby
declare the nature of this invention to be as follows:-
This invention has for its object improvements to facilitate the opening and closing
of cylindrical filter presses such as are described in the Specification of a former
Patent granted to us No. 2127 dated February 10th 1887, by which both time and
labour are saved.
In the filter press described in the above Specification the cylinder is made in two
halves and revolves on supports fixed underneath it and it is jointed axially so that it
can be opened and closed. Faced surfaces on the halves are held tightly together
with bolts and cotters. The ends of the cylinder are closed with end pieces secured
by bolts and nuts.
According to our present invention instead of the supports fixed underneath, the
cylinder is mounted on trunnions at its ends or the end pieces may be so constructed
as to form bearings for the rotating of the cylinder, thus allowing of a clear space
under the cylinder for emptying.
The two halves of the cylinder are held firmly together by means of clamps on one
side, the other side having a knuckle joint without bolts or clamps.
The axial joint pieces are formed in such a manner that a projection on one fits
into a recess on the other when both are together.
The bolt holes in the ends of the top half of the cylinder and in the end pieces are
slotted out to the circumference of the cylinder, thus avoiding the necessity of entirely
unscrewing the nuts from off the end joint bolts.
Dated this 13th day of January 1890.
CARPMAEL & Co.,
Agents.
COMPLETE SPECIFICATION.
Improvements in Filter Presses.
We, JOHN BROCK, Alkali Manufacturer, British Alkali Works, Widnes, Lancashire
and THOMAS MINTON, Works Manager, British Alkali Works, Lancashire, 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:—
This invention has for its object improvements to facilitate the opening and closing
of cylindrical filter presses such as are described in the Specification of a former
Patent granted to us No. 2127 dated February 10th 1887 by which both time and
Labour are saved.
In the filter press described in the above Specification the sludge or material to be
filtered is forced into a perforated cylinder lined with gauze aud filter cloth, through
a pipe having holes in it which passes centrally through the cylinder from end to end.
The cylinder is made in two halves and revolves on supports fixed underneath it and
it is jointed axially so that it can be opened and closed. Faced surfaces on the halves
are held tightly together with bolts and cotters. The ends of the cylinder are closed
with end pieces secured by bolts and nuts.
According to our present invention instead of the supports fixed underneath, the
cylinder is mounted on trunnions at its ends or the end pieces may be so constructed
as to form bearings for the rotating of the cylinder, thus allowing of a clear space
under the cylinder for emptying.

page_text: The two halves of the cylinder are held firmly together by means of clamps on one
side the other side having a knuckle joint without bolts or clamps.
The axial joint pieces are formed in such a manner that a projection on one fits into
a recess on, the other when both are together.
The bolt holes in the ends of the top half of the cylinder and in the end pieces are
slotted out to the circumference of the cylinder, thus avoiding the necessity of
entirely unscrewing the nuts from off the end joint bolts.
In order that our said invention may be fully understood and readily carried into
effect we will proceed to describe the drawings hereunto annexed.
Figure 4 snews to a larger scale an elevation of a portion of the axial joint as it is
made on one side of the cylinder.
Figure is an end view of the parts shewn by Figure 4.
Figure 6 shows a like portion of the joint as it is made on the other side of the
cylinder
Figur 7 is an end view of the parts shewn by Figure 6.
Aard A2 are the two parts of the axially jointed cylinder. B1 and B2 are the
end pieces C is the perforated feed pipe passing through the cylinder. D is a worm
wheel fixed on the end piece B¹. E is a worm gearing with the wheel D and slowly
rotating the cylinder. F F are standards supporting the apparatus leaving the entire
space beneath the cylinder free which greatly facilitates working in emptying the
apparatus.
The parts A¹ A are formed with end flanges a a and a central strengthening
flange a¹. The end pieces B¹ B' are secured by bolts to the flanges a a and to facilitate
the removal of the part A² the bolt holes in it and the corresponding holes in the end
pieces are slotted or open at their ends so that as soon as the nuts are slackened the
bolts can be taken out without screwing off the nuts.
The end pieces B¹ B2 are formed with necks or bearings to rest in the standards F F
and through these necks the feed tube C passes. The feed tube remains stationary
and stuffing boxes in the end pieces form a liquid tight closing around it. The
perforated cylinder is lined with wire gauze and within this lining a filter cloth is laid.
Another wire gauze is laid within the cloth to protect it from wear. Along each
edge of the semi cylindrical parts A¹ A joint pieces G G G and G are fixed. The
joint piece G¹ has lugs upon it at intervals and in the lugs are cavities g'. The joint
piece G2 also has lugs in which are knuckle like projections 92 which are received
into the cavities g¹. The joint piece G¹ is so applied that the edge of the part A' of
the cylinder projects beyond it but the joint piece G2 on the contrary is so applied
that it overlaps the edge of the part A². In this way an interlocking of the parts is
obtained which renders the joint more secure. The joint pieces G³ and G have
lugs g³ and g to receive screw clamps H H by which the lugs are forced together and
the parts of the cylinder securely locked the one to the other. The lug g³ is suitably
formed to bear upon the lower bar h of the clamp, whilst the lug 9* is adapted to
receive the pressure of the screws H'H' upon it; these screws pass through tapped
holes in the upper bar of the clip H. The joint pieces G³ G* break joint with the
edges of the parts A¹ A2 in the saine way as the joint pieces G¹ and G2.
The material to be filtered or treated is pumped into the cylinder through the
pipe C whilst the cylinder is slowly rotated and the supply is continued until
the cylinder is fully charged with solid matter. Then if required water is pumped
in until all soluble material is washed away. The press is then opened and
discharged.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A perforated cylinder filter press with the cylinder divided parallel to the axis
into two parts which are connected with knuckle and clamp joints substantially as
described.
2. A perforated cylinder filter press with the cylinder divided parallel to the axis
into two parts which are fitted together with overlapping joint pieces and provided
with end pieces secured by bolts in slotted holes these end pieces having necks
or bearings supported by standards which thus carry the cylinder leaving a free space
beneath.
3. A filter press substantially as represented by the annexed drawings.
JOHN BROCK.
THOMAS MINTON.