Improvements in Bagasse Filters.
Year: 1895

page_text: Date of Application, 9th Dec., 1895-Accepted, 25th Jan., 1896
COMPLETE SPECIFICATION.
Improvements in Bagasse Filters.
I, ALEXANDER HISLOP WRIGHT, of 86 Nelson Street, in the City of Stratford,
in the County of Perth, in the Province of Ontario, Canada, Engineer, 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:-
My invention relates to an improvement in what is known as Bagasse Filters and
the object of the invention is to design an economically constructed filter of this
class, which will effectually remove all impurities from the sugar cane juice, syrup
and molasses and which may be readily operated by an unskilled laborer and it
consists essentially of a filter preferably cylindrical in shape and provided with the
interior top and bottom perforated plates between which the bagasse is placed, the
filter being pivoted intermediately on hollow trunions through which the juice
passes to and from the filter, the filter being also tilted on the trunions and the
cover being adapted to be removed in the manner hereinafter more particularly
explained.
The drawing represents a sectional perspective view of a filter constructed in
accordance with my invention.
A is the cylindrical body of the filter. B is the concavo-convex bottom and
C the concavo-convex top. The bottom B has downwardly extending flanges b by
which it is secured to the bottom of the cylindrical body. The top Chas an
outwardly extending flange c and a stiffening ring e provided with a downwardly
extending flange c². D are a series of swing bolts pivotally connected to the
brackets d secured on the cylinder. The bolts D are designed to be swung into
recesses c³ and are provided with nuts d' to hold the top C down. E is the bagasse,
which is situated between the top and bottom perforated plates F and G. G¹ is
a layer of straining cloth situated on top of the bottom plate G. The top plate
has limiting ring bolts f, which are designed to limit the upward movement of the
top plate F caused by the expansion of the bagasse. The ring bolts also serve
to provide a ready means for the removal of the top plate. The bottom plate G
is supported in the centre upon a plate band at the edge upon the ring 2. Screw
rings are secured to the bottom of the plate into which may be inserted any form
of ring bolts, so that the bottom plate may be removed when the bagasse is all
emptied from the cylinder as hereinafter referred to. are notches formed at each
edge of the plate G diametrically opposite, and 5 are pins, which normally extend
over the edge of the plate, so as to hold such plate in position when the filter is
tilted. By turning the plate the notches 1ª may be brought opposite the pius, and
the plate inay be readily removed.
H, is a flanged inlet pipe, which is secured on the cylinder by the flanges h, which
are suitably rivetted to the cylinder. The top opening h¹ of the pipe H in the
cylinder is above the level of the top perforated plate F. The pipe H is bent at
its lower end and extends through the journal box I at the top of the standard J.
The outer end of the pipe H is threaded and is provided with a union coupling K
with a suitable washer k, by which it is connected to the end of the supply pipe L.
The union coupling K thus serves to provide for the free rotation of the bent end
of the pipe H in the journal box I without disturbing the pipe L.
M is the outlet pipe, which is secured by flanges m and suitable rivets to the
cylinder. The bottom of the pipe M is connected to the cylinder by an opening m¹

page_text: made in such cylinder in proximity to the convex bottom B and below the ring b².
The top of the pipe M is bent at right angles to the major portion of it and
extends through a suitable journal box I at the top of the standard J. The outer
end of the pipe M is threaded and is connected by a union coupling K to the lower
end of the discharge pipe N. The discharge pipe N leads upwardly to a point
above the top of the cylinder where an elbow is formed and the pipe turned
downwardly to extend over the funnel-shaped upper end of the down pipe O.
The standards J are both supported upon the cross beams J¹ which are themselves
supported by the uprights J2.
It will thus be seen that by supporting the bottom of the cylinder a considerable
distance from the ground a truck or car may be wheeled underneath, so as to receive
the bagasse when I cleanse out my filter as hereinafter explained.
P is a tap extending outwardly from the lower portion of the cylinder near the
bottom thereof to a point above the funnel shaped end p of the pipe p', which leads
to the down pipe O. By means of the tap P and pipe p' the syrup may be drained
off from the bottom of the filter into the down pipe.
Qare upright rods secured at the bottom in the bosses i forming part of the
journal box I. The upper ends of the upright rods Q are connected together by
a cross bar Q Q2 is a bar supported centrally upon the cross bar Qand
designed to support the end of the longitudinal bar Q3 a portion of which only is
shown.
In practice I operate my filters in pairs, so that it will be understood that the
corresponding filter will be situated at the opposite side of the filter shown in the
drawing but I do not show this, it being of course understood that similar upright
rods Q with a cross bar Q' as well as supply and discharge pipes will be provided.
The bar Q3 of course extends between the cross bar shown and the corresponding
cross bar not shown.
R is a travelling wheel journalled in the top of the vertical bars r, which are
connected together at the bottom by the block R. S is a spindle provided with a
hand wheel S and a threaded upper end which extends through the block R¹. The
lower end of the spindle is provided with jaws s. T is a metal strap secured to the
top C. is an eye-bolt provided with a flange t'. The bolt t extends through
the strap T and is held to such strap by the nut . is a pin, which extends
through the jaws s and the eye of the bolt t, thus serving to keep the lower end of
the spindle connected with the top of the filter. U is a bar provided with metal
straps u extending around the rod Q and a metal strap u extending around the
supply pipe L, thus serving to brace the pipes L and rod together and hold them
in position.
V is a bar extending between the pipe N and Q. is a metal strap extending
around the rod Q and secured to the bar, and v' is a metal strap extending around
the pipe N and secured to the bar. The bar V thus serves to inaintain the rod and
pipe in proper relative position.
The supply pipe L is connected at the top to the syrup pipe W and is provided
with a suitable faucet W. X is a water pipe, which is connected to the supply
pipe by a branch pipe X'. The branch pipe is supplied with a suitable faucet.
Y is a vent cock extending upwardly from the top C and designed to allow the
escape of the air when the syrup is to be passed through the filter.
In passing such syrup through the filter it enters from the supply pipe L and
passes up through the pipe H to the space between the perforated plate and the
top C which it fills on account of the top of the pipe L being above such
level. The syrup then passes down through the bagasse and perforated plate G
and then up through the pipes M and N and then through the down pipe O, which
leads the purified syrup off to some suitable receptacle.
After the syrup has been passed through the filter it may be cleansed by turning
off the faucet W₁ and turning on the faucet when the water will pass down
through the pipe L and up through the pipe H and down through the perforated
plate F bagasse E and perforated plate G until it forces all the syrup, which is

page_text: heavier to the bottom of the filter. The tap P may be then turned on and the
syrup drained off through the pipe p¹. The pipe M will also be drained through
this tap.
The pipe H may be drained off by means of the tap 2. It will, therefore, be
readily seen that the filter after using may be readily cleansed.
As I find in practice that the bagasse has to be frequently renewed 1 provide a
simple means by which the cover may be removed and the filter turned on its pivot
so as to empty the bagasse into any suitable car or receptacle. This is done by
loosening the nuts d' and swinging the bolts from the recesses c³. The cover may
now be raised by turning the handle S¹. The filter is then turned by means of a
quadrant 2 secured to the pipe H and a pinion 3 meshing therewith, the spindle 31
of which is journalled in a bracket 4 and is turned by a crank handle 5. There is
a lob 6 formed on the end of the quadrant, so as to prevent the filter from tilting
in the opposite direction. On the opposite end of the spindle 6 is secured a toothed
wheel 7, which is designed to be engaged by a double dog 8 secured on the end of
the spindle 9 journalled in the brackot 10. The double dog 8 is provided with
a knob 11.
By this means when the dog is swung over from position in drawing, the filter as
it is being tilted will be held in place by the dog 8 engaging with the teeth of the
wheel 7. When the filter has been tilted sufficiently far the pipe H comes in
contact with the wheel 7 and thereby limits the reversal movement of the filter.
The filter now cannot be restored to its normal position until the dog 8 is placed in
the reversed position shown in the drawing whereupon such dog will serve to hold
the filter from receding to its reverse position as it is being turned to its normal
position.
When the filter is tilted the perforated plate F may be removed by th
ring bolts and the bagasse and plate G may be also removed and the filter
thoroughly cleansed. The bagasse may be deposited into a receptacle or car
designed to be brought underneath the filter for this purpose. Upon restoring the
filter to its normal position the plate G may be replaced and fresh bagasse put in
and the plate F also restored to its normal position.
As my filters are designed to be used in pairs it will be understood that when one
filter is being used the top of the other of the pair may be removed by simply
taking out the pin t3, which extends through the jaws s and eye bolt t and throwing
the screw spindle S by means of the wheel R along the track Q3 to a point above
the centre of the other filter in which the pin t³ may be now inserted through the
jaws s and eye-bolts of the other filter when by unloosening the nuts and
swinging the bolts D outwardly the top of this latter filter may be removed and
the parts removed and the filter cleansed as herein before described.
It will thus be seen that only one screw spindle with its accompanying mechanism
is.required for each pair of filters.
In a filter such as I describe pivotally supported upon the trunion ends of the
pipes it will be seen that the manipulation of such filter will be extremely simple
and rapid and as there is no skilled labor required and the parts are all simple the
operation of the filters may be carried on with great economy.
Although I describe the supply and discharge of the syrup as being made
through the trunions it will of course be understood that a suitable pipe might be
connected to the bottom of the filter to discharge while the supply might be made
through a pipe extending through the top and connected to a suitable hose.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is.
1. In a filter for syrup and like products, the combination with the cylindrical
body provided with a concavo-convex bottom and a concavo-convex top removably
secured to the body, of a perforated bottom plate suitably supportel above the
bottom, the bagasse supported upon such plate, and the perforated top plate anl

page_text: means for limiting its upward movement, and an inlet pipe leading into the cylinder
above the top plate and an outlet pipe leading from the cylinder beneath the bottom
perforated plate as and for the purpose specified.
2. In a filter for syrup and like products the combination with the cylindrical
body provided with a concavo-convex bottom and a concavo-convex top removably
secured to the body, of a perforated bottom plate suitably supported above the
bottom, the bagasse supported on such plate, a straining cloth upon such plate and
the perforated top plate and means for limiting its upward movement and an inlet
pipe leading into the cylinder above the top plate and an outlet pipe leading
from the cylinder beneath the bottom perforated plate as and for the purpose
specified.
3. In a filter for syrup and like products, the combination with the cylindrical
body provided with the concavo-convex bottom and concavo-convex top removably
secured to the body, of a perforated plate suitably supported upon an edge ring
and central plate, the bagasse supported upon a perforated plate, and the perforated
top plate and means for limiting its upward movement, and an inlet pipe leading
into the cylinder above the top plate and an outlet pipe leading from the cylinder
beneath the bottom perforated plate as and for the purpose specified.
4. In a filter for syrup and like products, the combination with the cylindrical
body provided with a concavo-convex bottom and concavo-convex top removably
secured to the body, of a perforated plate suitably supported above the bottom,
the bagasse supported upon such plate and the perforated top plate and the ring
bolts having the lower end secured in the plate as and for the purpose specified.
5. The combination with the cylindrical filter interiorly arranged as specified,
of flanged pipes secured to the cylinder diametrically opposite each other and
having outwardly extending bent ends forming trunions and bearings for the
trunions, the outer ends of the pipe being connected to the supply and discharge
pipes and the upper end of the inlet pipe extending into the cylinder above the
top perforated plate and the lower end of the outlet pipe extending into the
cylinder below the bottom perforated plate all as specified.
6. The combination with the cylindrical filter interiorly arranged as specified
and pipes secured to the cylinder diametrically opposite each other and having
outwardly extending bent ends forming trunions, and bearings and standards for
supporting the trunions, of a supply pipe connected by a union coupling to the
end of the inlet pipe and a discharge pipe connected by a union coupling to the
end of the outlet pipe of the filter as and for the purpose specified.
7. The combination with the cylindrical filter interiorly arranged as specified
and pipes secured to the cylinder diametrically opposite each other and having
outwardly extending bent ends forming trunions, and bearings and standards for
supporting the trunions, of a supply pipe connected by a union coupling to the
end of the inlet pipe and a discharge pipe connected by a union coupling to the
end of the outlet pipe of the filter and a down pipe separated from the upper end
of the discharge pipe as and for the purpose specified.
8. The combination with the cylindrical filter interiorly arranged as specified
and pipes secured to the cylinder diametrically opposite each other and having
outwardly extending bent ends forming trunious, and bearings and standards for
supporting the trunions, of the supply and discharge pipes suitably connected to
the inlet and outlet pipes respectively, the supply pipe being provided with a
suitable faucet and connected to the syrup pipe and having a branch pipe leading
to a water pipe such branch pipe also having a suitable faucet as and for the
purpose specified.
9. The combination with the cylindrical filter interiorly arranged as specified
and pipes secured to the cylinder diametrically opposite each other and baving
outwardly extending bent ends forming trunions, and bearings and standards for
supporting the trunions, of the supply and discharge pipes suitably connected to
the inlet and outlet pipes respectively, a quadrant on the horizontal end of the
inlet pipe, a pinion held on a suitable spindle journalled on one of the trunion

page_text: standards and a crank handle for turning such spindle as and for the purpose
specified.
10. The combination with the cylindrical filter interiorly arranged as
specified and pipes secured to the cylinder diametrically opposite each other and
having outwardly extending bent ends forming trunions, and bearings and standards
for supporting the trunions, of the supply and discharge pipes suitably connected
to the inlet and outlet pipes respectively, a quadrant on the horizontal en 1 of the
inlet pipe provided with an end lob or stop, a pinion held on a suitable spindle.
journalled on one of the trunion standards and a crank handle for turning such
spindle as and for the purpose specified.
11. The combination with the cylindrical filter interiorly arranged as specified
and pipes secured to the cylinder diametrically opposite each other and having
outwardly extending bent ends forming trunions, and bearings and standards for
supporting the trunions, of the supply and discharge pipes suitably connected to
the inlet and outlet pipes respectively, a quadrant on the horizontal end of the
inlet pipe, a pinion held on a suitable spindle journalled on one of the trunion
standards, a crank handle for turning such spindle, a toothed wheel secured on
the opposite end of the spindle and a supplemental spindle containing a double dog
designed to engage with the toothed wheel as and for the purpose specified.
12. In a filter of the class described the combination with the cylinder
provided with a suitable removable top having a central metal strap and an eye
bolt secured thereto, of a screw spindle provided with lower jaws, pin for
connecting the jaws to the eye-bolt, a block for supporting the spindle secured
at the lower end of the parallel bars r, a wheel at the upper end of the bars, a
longitudinal bar for supporting the wheel and a cross bar for supporting the end of
the longitudinal bar as and for the purpose specified.
13. The combination with the filter interiorly constructed as specified and down
pipe, of a tap at the bottom of the filter and a pipe leading from the mouth of the
tap to the down pipe as and for the purpose specified.
Dated the 0th dow of Doomben 1905
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.