IMPROVEMENTS IN VERTICAL-ROLL SUGAR-CANE CRUSHING MILLS
Year: 1884

page_text: COMPLETE SPECIFICATION.
"
I, WILLIAM RENWICK, of 65 West Regent Street, Glasgow, in the County of
Lanark, North Britain Engineer, do hereby declare the nature of my said invention
for "IMPROVEMENTS IN VERTICAL-ROLL SUGAR-CANE CRUSHING MILLS 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 has for its object the constructing and combining of the parts
of vertical-roll mills in an improved and simplified manner, and so that such mills
may be more effective and convenient in use and less liable to decay or to get out of
order than such mills as hitherto made.
In carrying out my Invention a box-like frame of castiron is provided for
holding two or three rolls, such frame being formed with inverted sockets to
receive the upper ends of posts of bamboo or wood which are let into the ground.
The frame is also provided with a tray shaped to catch the juice expressed from
the canes, and to deliver it from a spout formed at one side or other convenient
part. In some modifications the frame is made in a single piece without joint or
bolt, and when there are three rolls the two outer ones rotate on stationary spindles
one of which is adjustable. In other modifications suitable for either two or three
rolls, the box-like frame is made with upper and lower parts, or front and back
parts in separate pieces bolted together; and in such modifications the rolls may
be fixed on their spindles the journals of the spindles working against bearing
blocks of brass or other suitable metal and which are made adjustable. In
modifications with three rolls the turning power is applied to the spindle of the
middle roll by means of a long lever or yoke arm, and is transmitted by spur teeth
formed on the upper ends of all the rolls, to the outer rolls. When there are two
rolls the turning power is applied by means of a long lever or yoke arm fixed on
the spindle of one of them and is transmitted to the other by spur teeth which are
shrouded at their upper parts and gear with spur teeth shrouded at their lower
parts, on the other roll.
And in order that my said Invention and the manner of performing the same
may be properly understood there is shown by way of example on an accompanying
sheet of explanatory drawings a modification of a vertical-roll sugar-cane mill as
made with my improvements, Figure, 1, of these drawings is a plan, figure, 2, is

page_text: a partially sectioned side elevation, and figure, 3, is a transverse vertical section.
In these drawings the same reference nuinerals are used to mark the same or like
parts wherever they are repeated.
The mill shown in the drawings is constructed for two rolls, 5, 6, which are held
inbox-like frame, 7, consisting of two iron castings the joints of which are in the
vertical plane passing through the axes of the rolls, 5, 6. The two castings of the
frame, 7, which are exactly alike so that they can be cast from one pattern, aro
fixed together by screw bolts, 8, after the rolls 5, 6, have been placed between
them. The frame, 7, is made with four slightly inclined conical sockets, 9, into
which are jammed the upper tapered ends of posts, 10, of bamboo or wood and
shown in figuro, 8, these posts having their lower ends let into the ground when
the mill is fixed for working. The rolls; 5, 6, are fixed on spindles, 11, 12, and one
end of one, 11, of them is made witli a square projecting end to receive the centre or
socket piece of a yoko or turning lever. The journals of the roll spindles, 11, 12,
are held in upper and lower bearing boxes, 13, 14, fitted with brasses or bearing
bushes to bear against the outer sides of the journals. The bearing boxes, 13, 14,
are placed in longitudinal openings or slots formed in the top and bottom of the
frame, 7, the upper bearing boxes, 13, being formed with small flanges, 16 to rest
on the top of the frame at the sides of the slot; and the lower bearing boxes, 14,
are supported on movable platos, 16, which are themselves inserted in grooves or
notches in downwardly projecting parts, 17, of the frame, 7. On removing the
plates, 16, the lower bearings, 14, can be taken out for examination or repairs.
The several bearing boxes, 13, 14, are screwed up or adjusted by screws, 18, tapped
through nuts, 19, inserted in sockets formed for them in the fraine, 7. A plate, 20,
one half of which is seen in figure, 2, and which is fixed on one side of the
frame, 7, in front of the middle line between the two rods, is made with an opening
for introducing the canes and is at once a guide and a guard to prevent the
workers from getting their hands in between the rolls. A tray, 21, of sheet metal
made with a delivery spout is provided to receive the juice and is held in place by
the passing of the lower journals of the rolls through it. The rotation is transmitted
from one roll, 5, to the other, 0, by spur pinions, 22, 23, which may be either
formed in the same castings as the rolls or separate and keyed on the spindles.
These pinions, 22, 23, are strengthened by shroudings that of the driven pinion, 23,
being below the teeth and that of the driving pinion, 22, being above the teeth.
I do not restrict myself to the precise details hereinbefore described or delineated
provided that the distinctive features of my Invention are retained, these being,
1. placing the vertical rolls in a box-like castiron frame consisting of two exactly
similar parts cast from one pattern, and, 2. forming the castiron frame with sockets
for the supporting posts.
Haying 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. The improved construction of vertical-roll sugar-cane crushing mill.in which
the rolls are placed in a box-like castiron frame consisting of two castings from one
pattern substantially as hereinbefore described.
2. The forming of the castiron frame with sockets for the supporting posts.
ALL. The Punth day of Santamber 1884