Improvements in Sugar-cane Mills.
Year: 1888

page_text: Date of Application, 24th Dec., 1888
Complete Specification Left, 20th Sept., 1889-Accepted, 26th Oct., 1889
PROVISIONAL SPECIFICATION.
Improvements in Sugar-cane Mills.
A communication from ROBERT ALLAN, of Demarara Foundry, Georgetown,
Demarara, Engineer.
I, JOHN DEMPSTER, of 49 Robertson Street, Glasgow, in the County of Lanark
North Britain, Iron Merchant, do hereby declare the nature of this Invention to bo
as follows, that is to say :-
The said Invention has for its object to improve the construction of sugar-cane
mills, and to combine the parts of a three-roller mill so as to dispense with what is
known as the dumb returner or guide for leading the canes round from the first to
the second gripping and crushing positions.
In carrying out the Invention the top roller and second lower roller which are made
as usual of about the same size are placed with their axes in a plane which is rather
more inclined than in ordinary mills; and the caps of their bearings are connected
by long bolts parallel to the plane of the axes, hydraulic pressure cylinders being
applied to the bearings if desired.
The other lower roller which is smaller than the other rollers is placed almost
directly below the top roller and as closely as can be conveniently managed into the
bight between the two other rollers; and in consequence of the comparative smallness
of this roller and its position the ordinary dumb returner is rendered quite unnecessary
as the canes pass without difficulty from the part where they are first partly crushed
between the top roller and the small lower roller to the part where they receive the
final crushing between the top roller and the large lower roller.
Dated this Twenty-second day of December 1888.
EDMUND HUNT,
Applicant's Agent,
Per pro. David Ferguson.
COMPLETE SPECIFICATION.
Improvements in Sugar-cane Mills.
A communication from ROBERT ALLAN, of Demerara Foundry, Georgetown,
Demerara, Engineer.
I, JOHN DEMPSTER, of 49 Robertson Street, Glasgow, in the County of Lanark,
North Britain, Iron Merchant, 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 that is to say:―
The said Invention has for its object to improve the construction of sugar-cane mills,
and to combine the parts of a three-roller mill so as to dispense with what is known
as the dumb returner or guide for leading the canes round from the first to the
second gripping and crushing positions.
On the accompanying sheet of explanatory drawings, figure, 1, is a transverse vertical
section of a three-roller sugar-cane mill as constructed according to the Invention,
and figures, 2, and 3, are outer-face views of the bearing caps and show the arrangement
of the bolts.
In carrying out the Invention the top roller, A, and second lower roller, B, which
are made as usual of about the same size, are placed with their axes in a plane which
is rather more inclined than in ordinary mills, and the caps, C, D, of their bearings
in the housings or frames, E, are connected and held by two long bolts, F, parallel

page_text: to the plane of the axes.
caps, C, D, if desired.
Hydraulic pressure cylinders may be applied to the bearing
The other lower roller, G, is made smaller than the rollers, A, B, and is placed
almost directly below the top roller, A, and as closely as can be conveniently arranged
into the bight or curvilinear angle between the rollers, A, B; and in consequence
of the comparative smallness of this roller, G, and its position the ordinary dumb
returner is rendered quite unnecessary, as the canes pass without difficulty from the
part, H, where they are first partly crushed between the top roller, A, and the small
lower roller, G, to the part, J, where they receive the final crushing between the top
roller, A, and the large lower roller, B.
Each cap, K, of the bearings of the small lower roller, G, is. secured by four
nuts, L, screwed upon the ends of bars, M, which are in the form of long staples
passing along the sides of the housing or frame, E, and with their cross ends, N,
engaging on the further edge thereof. The driving gearing and other accessories
may be the same as in ordinary mills, the spurwheel on the shaft of the small lower
roller, G, being of course of a size corresponding to that roller.
Having now particularly described and ascertained the nature of the said Inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The improved three-roller sugar-cane mill in which a small roller is, without the
intervention of a dumb returner, combined with two large rollers which are placed
with their axes in a considerably-inclined plane, the small roller being placed almost
directly below one of the large rollers and in the bight between the two large rollers
substantially as hereinbefore described.
Dated this Bighteenth day of Sentember 1889
EDMUND HUNT,
Applicant's Agent.