Sugar Cane Mills:
Year: 1894

page_text: Date of Application, 30th May, 1894
Complete Specification Left, 28th Feb., 1895-Accepted, 6th Apr., 1895
PROVISIONAL SPECIFICATION.
Sugar Cane Mills:
I, ALFRED CHAPMAN of 17 York Street, Liverpool, in the County of
Lancaster, Managing Director of the Firm of Fawcett Preston & Co. Ltd., do
hereby declare the nature of this invention to be as follows:
This invention has reference to sugar cane mills, that is, machinery used for
crushing sugar cane for the extraction of juice therefrom, and has for its object
to provide an improved construction of parts thereof used for holding and
supporting or carrying the rollers.
According to this invention, there is provided a compact arrangement of the
rollers in conjunction with a construction of frame; and means of holding the caps
of the upper roller bearings, which afford great strength to the mill. The lower
rollers are brought together as closely as possible, with the "returner bar" or
"knife" between same; whilst the means for holding the upper roller caps and
roller down, consists of bolts which are carried through the cap and whole frames
from top to bottom in an inclined direction towards the central plane of the mill. so
that they come closely together at the lower end. By this means the lower rollers
may be brought closer together; and their distance apart may be further reduced
by constructing such bolts or parts of them which pass through the frames; of
a form or section relatively narrow in a direction transversely to the axes of
the rollers, and large in the direction parallel with said axes, whereby the required
sectional area of the bolts is made up. The lower ends of these bolts may be
held in position by cotters or suitable means, whilst the upper ends receive the
cap nuts and are made cylindrical and threaded.
A modified construction by which the effect above described may be obtained,
but which is not so suited to mills having their frames of cast iron, but of cast steel,
consists in making the bolts or holding down means in the form of loops, the lower
part of which are of, or similar to, a V or U form, the whole bolt device lying in
recesses in the sides of the frames, and at each side of such frames. The lower
part of these holding down means or bolts, and the recesses in the frames, are
carried down between the bearings of the lower rollers, and provide thereby a
large depth of metal of the frame above the lower part thereof, affording thereby
a corresponding strength of frame, and without interfering with the strength of the
frame between the axes of the lower and upper rollers.
Dated this 29th day of May 1894.
Sugar Cane Mills..
I, ALFRED CHAPMAN, of 17 York Street, Liverpool, in the County of
Lancaster, Managing Director of the Firm of Fawcett Preston & Co. Ltd., 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 reference to sugar cane mills, that is, machinery used for

page_text: crushing sugar cane for the extraction of juices therefrom, and has for its object to
provide an improved construction of parts thereof used for holding and supporting
or carrying the rollers.
According to this invention, there is provided in a three roller mill, a compact
arrangement of the rollers, in conjunction with a construction of frame, and means
of holding the cap of the upper roller bearings, which afford great strength to the
mill. The lower rollers are brought together as closely as possible, with the
"returner bar" or "knife" between same; whilst the means for holding the upper
roller caps and roller down, consists of bolts which are carried through the cap.and
whole frames, from top to bottom, in an inclined direction towards the central
plane of the mill, so that they come closely together at the lower end. By this
means the lower rollers may be brought closer together; and their distance apart
may be further reduced by constructing such bolts or parts of them which pass
through the frames, of a form or section relatively narrow in a direction trans-
versely to the axes of the rollers, and large in the direction parallel with said axes,
whereby the required sectional area of the bolts is made up. The lower ends of
these bolts may be held in position by cotters or suitable means, whilst the upper
ends receive the cap nuts and are made cylindrical and threaded.
A modified construction by which the effect above described may be obtained,
I but which is not so suited to mills having their frames of cast iron, but of cast
steel, consists in making the bolts or holding down means in the form of loops, the
lower part of which are of, or similar to, a V or U form, the whole bolt device
lying in recesses in the sides of the frames, and at each side of such frames. The
lower part of these holding down means or bolts, and the recesses in the frames,
are carried down between the bearings of the lower rollers, and provide thereby a
large depth of metal of the frame above the lower part thereof, affording thereby
a corresponding strength of frame, and without interfering with the strength of the
frame between the axes of the lower and upper rollers.
My invention is illustrated in the accompanying drawings. In these, Figure 1
is a sectional elevation of a three roller sugar cane mill provided with my improve-
ments; Figure 2 being a plan in section through the frame at the line A A.
These figures illustrate the arrangement where the "through-bolts" are employed.
Figures 3, 4 and 5 shew the modification where the holding down bolts are in
the form of loops; Figure 3 being an elevation in section, and Figures 4 and 5
sections of the frame at the lines A A and B B Figure 3.
"
Referring in the first instance to. Figures 1 and 2, a is the journal of the upper
roller, and 61 62 are the journals of the lower rollers 66 66, all three rollers being
indicated by dotted lines for the sake of clearness. The upper journal is supported
and runs in bearing "brasses" a', and the journals are carried and run in the
bearing brasses 68° 6. c designates generally the frame of the mill. is the
"knife
66
or returner bar," which, as usual, extends across the machine, it being
supported and carried by the side frames c, and the upper surface of which is
disposed beneath the roller à' and between the rollers 68 6. e is the cap which
holds the upper roller in position, and are the bolts which hold this cap and
roller down, these bolts in being inclined or brought towards one another in the
manner shewn, as closely as possible, so as to enable the rollers 6' 62 to be brought
closely together, and the width of the surface of the table d, over which the canes
travel in passing through the mill, to be reduced.
By this special construction, namely, by arranging the bolts in the manner
shewn and described, the centres, as will be seen, of the rollers and 66, can be
and are brought considerably nearer each other than if the bolts were carried
vertically down through the frame in the usual way; and by bringing these rollers.
and so reducing the width-designated by the distance in Figure 1-of the
"knife" surface, as described, the length of travel of the canes over a stationary
surface in passing through the mill is considerably or notably reduced, and a
corresponding reduction in friction due to the pressure of the canes upon the

page_text: surface, in passing over it--which in ordinary mills is great is effected, and the
power expended in driving the mill proportionately diminished.
As regards the construction shewn in Figures 1 and 2, by which the effects
specified are produced, this is more particularly suited to cases where the frames c
are made of cast iron, as in such cases, unless the metal were made extremely
heavy, the strength of the weakest point of the frame, which is through the
waist of the frame, viz. at the line y Figure 1, would be insufficient or dangerously
weak without the through bolts. However, in the case of the frames being
made of cast steel, the use of the through bolt arrangement, although advan-
tageous even in that case, is not of such great importance, and in such cases the
construction shewn in Figures 3, 4 and 5 can also be safely and advantageously
used; that arrangement, on the other hand, not being suitable-except as above
referred to in the case of the frames being of cast iron.
Referring to Figures 3, 4 and 5, which as stated, shew a modification more
particularly suited to cases where the frame is of cast steel, the bolts are of the
form of loops, and like those shewn in Figures 1 and 2 are brought in towards each
other as they approach, and at, the planes, in which the journals of the rollers 6
and lie; the lower part of the bolts being in the form of a V. By this, the
rollers and are enabled to be, and are, brought inwards or towards each other,
and the width, 2, of the upper surface of the knife d is rendered narrow, as in the
mill set forth with reference to Figures 1 and 2. These bolts fare fastened or
held in the frames c by providing a channel or recess in each side of the frames,
and placing them in them; thus, the stress of the frames, due to the tension of the
bolts f, is taken by the triangular shaped part of the frame circumscribed by or
lying within the bolts.
In other respects than the forms of the bolts, and their means of support and
attachment to the frames, the mill described with reference to and shewn in
Figures 3 to 5 does not differ from that set forth with reference to Figures 1 and 2.
The parts of this mill not specifically mentioned, which are the same as or
equivalent to those specified with reference to Figures 1 and 2, are marked with
the same letters of reference, and thereby provide all that is necessary for a full
and clear understanding of the construction of this modification.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
.
1. The improvement in sugar cane mills substantially as herein set forth with
reference to Figures 1 and 2, and Figures 3 to 5 of. the drawings, namely, a mill
having the holding-down bolts for the upper roller, which pass down on either side
of the journal thereof, inclined or brought inwards or towards each other as they
approach the planes in which the journals of the lower side rollers lie (the said
rollers also being brought together), and a narrow knife or returner bar for the
purposes set forth.
Dated this 26th day of February 1895.
:
CHEESBROUGH & ROYSTON, Fels. Chart. Inst. P.A.,
15, Water Street, Liverpool, Applicant's Patent Agents.