Improvements in Sugar-cane Mills.
Year: 1897

page_text: Date of Application, 17th June, 1897
Complete Specification Left, 16th Mar., 1898-Accepted, 16th Apr., 1898
PROVISIONAL SPECIFICATION.
Improvements in Sugar-cane Mills.
I, HUGH WALLACE AITKEN, of Netherlea, Pollokshields, in the County of
Glasgow, North Britain, Engineer, do hereby declare the nature of this invention
to be as follows, that is to say:-
My said invention relates to sugar-cane mills of the kind in which an upper
roll is combined with two lower rolls, the improvements being also applicable
to mills having one or more other rolls combined with the three thus arranged.
The object of my invention is to contrive that the two lower rolls may be
placed nearer to each other than in existing mills, so that the canes may have a
smaller distance to pass through from the grip between one lower roll and the
upper roll to the grip between the second lower roll and the upper roll, the
arrangements for this purpose being also such as to allow of the adjustment of
the lower rolls when the rolls become reduced in diameter without materially
altering the distance between the nearest parts of the lower rolls. A strong,
compact, and rigid framing is also secured by the improved arrangements.
In carrying out my invention I provide for the lower rolls being adjusted
vertically upwards or in directions inclined towards the upper roll. The necks
of the lower rolls are entered into gaps formed in the sides of the housings or
end frames, and the gaps are closed by caps which are secured by long bolts ex-
tending across each housing. The ends of the bolts are round where they pass
through projecting parts of the caps and receive the screw nuts, but they are.
flat at other parts and are outside of the housings. The bearing brasses for
the necks of the lower rolls have their outer sides in contact with inwardly
projecting parts of the caps, the contact surfaces being such as to allow of
sliding when the brasses are moved upwards. The bottoms of the brasses are
inclined and rest upon wedges which are adjustable by means of screws for
raising or lowering the brasses and the rolls with them. The bearings of the
upper roll are, as usual, held down by long bolts, but these bolts are made flat,
except at their upper ends, so as to occupy less space in the width of the
housings and not to interfere with the more inward placing of the lower rolls.
The dumb turner, which is narrower than usual to suit the nearness of the
lower rolls, is made with a vertical frame extending down between the lower rolls
and resting upon bottom supports on which it is fitted to rock sufficiently for the
adjusting of its upper end, which adjusting is effected by means of hooked bolts
at the ends.
Dated this Sixteenth day of June 1897

page_text: Improvements in Sugar-cane Mills.
I, HUGH WALLACE AITKEN; of Netherlea, Pollokshields, in the County of
Glasgow, North Britain, Engineer, do hereby declare the nature of this inven-
tion 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:-
My said invention relates to sugar-cane mills of the kind in which an upper
roll is combined with two lower rolls; the improvements being also applicable
to mills having one or more other rolls combined with the three thus arranged.
The object of my invention is to contrive that the two lower rolls may be
fixed nearer to each other than in existing mills; so that the canes may have a
smaller distance to pass through from the grip. between one lower roll and the
upper roll to the grip between the second lower roll and the upper roll, the
arrangements for this purpose being also such as to allow of the adjustment of
the lower rolls when the rolls become reduced in diameter without materially
altering the distance between the nearest parts of the lower rolls.
And in order that my said invention and the manner of performing the same
may be properly understood I hereunto append a sheet of explanatory drawings
to be hereinafter referred to, and showing my improvements in sugar-cane mills.
Figure, 1, of the drawings is a sectional end elevation of a mill as made with
my improvements, Figure, 2, is a transverse section as at right angles to
Figure, 1, of a portion of the mill, and Figure, 3, is an end elevation of a mill
showing a modification of my improvements. The same reference letters are
used to mark the same or like parts wherever they are repeated.
In carrying out my invention I provide for the lower rolls, A, B, being adjusted
vertically upwards or in directions inclined towards the upper roll, C. The
necks or journals, D, E, of the lower rolls, A, B, are entered into gaps, F, G,
formed in the sides of the housings or end frames, H, and the gaps are closed
by caps or covers, J, K, which are secured by long bolts, L, M, extending across
each housing. The ends of the upper bolts, L, are round where they pass through
projecting parts of the caps, J, K, and receive the screw nuts but they are flat
at other parts and are outside of the housings, H. The lower bolts, M, are
round from end to end, but with other end frames, having no raised portions on
the sides in the way of the bolts, they may be made like the upper bolts, L, and
having their flat parts outside of the housings. The bearing brasses, N, P, for
the necks, D, E, of the lower rolls, A, B, have their outer sides in contact with
inwardly projecting parts of the caps, J, K, the contact surfaces being such as
to allow of sliding vertically when the brasses are moved upwards. The bottoms'
of the brasses, N, P, are inclined and rest upon wedges, Q, R, which are adjust-
able by means of screws, S, T, for raising or lowering the brasses and the rolls,
A, B, with them. The under sides of the brasses, N, P, of each of the lower
rolls, A, B, may be shaped so that the wedges, Q, R, shall have a positive inward
movement as shown in those connected with the roll, A, or a positive outward
movement as shown in those connected with the roll, B. The bearings of the
upper roll, C, are held down by long bolts, U, which are made flat except at
their upper, ends. so as to occupy less space in the width of the housings, I, and
not to interfere, with the more inward placing of the lower rolls, A, B. The
aumb turner, V, which is narrower than usual to suit the nearness of the lower
rolls, A, B, is made with a vertical frame, W, extending down between the
lower rolls and resting upon bottom supports X, on which it is fitted to rock
sufficiently for the adjusting of its upper end which adjusting is effected by means

page_text: of hooked bolts, Y, the hooked part clasping a pin, Z, at the upper ends of the
vertical frame and the other end of the bolt being adjustably fixed to the caps, K.
In the modification shown in Figure, 3, the bearing brasses, N, P, are fitted
to move in inclined guides, so that the lower rolls, A, B, can be adjusted in
directions inclined towards the upper roll, C. The other parts of this modifica-
tion not referred to are to be understood to be the same as, or similar to the
corresponding parts in the modification herein before described.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is:-
1. In sugar-cane mills the combination and arrangement of parts substantially
as and for the purposes herein before described and as shown in Figures, 1 and 2,
of the accompanying dawings.
2. In sugar-cane mills the combination and arrangement of parts substantially
as and for the purposes herein before described and as shown in Figure 3, of the
accompanying drawings.
3. In sugar-cane mills making the bearing brasses of the lower rolls to slide
in contact with inwardly projecting parts of the caps, or the caps and the housings,
and making their bottoms inclined and resting on adjustable wedges substantially
as and for the purposes hereinbefore described.
4. In sugar-cane mills employing flat bolts for holding down the bearings of the
upper roll substantially as and for the purposes herein before described.
5. In sugar-cane mills providing a dumb turner which is narrower than usual
and made with a vertical frame extending down between the lower rolls and
resting upon bottom supports on which it is fitted to rock substantially as and
for the purposes hereinbefore described.
Dated this Fifteenth day of March 1898.
EDMUND HUNT.
Applicant's Agent.