Improvements in Roller Mills.
Year: 1889

page_text: Date of Application, 20th May, 1889
Complete Specification Left, 20th Feb., 1890-Accepted, 22nd Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Roller Mills.
I, JOHN MURRAY CASE of 1112 Long Street, Columbus, Ohio in the United
States of America Manufacturer do hereby declare the nature of the said Invention
to be as follows:-
:-
The object of my Invention is to provide a roller mill which will produce a higher
percentage of coarse granular middlings than will such machines as hitherto arranged
or constructed and also prevent undue breaking or cutting up of the bran and enable
the work to be done with a less number of successive breaks (or pairs of rollers) than
hitherto.
According to my Invention I provide a roll so constructed or formed that there are
cavities or spaces for holding the middlings and a projecting tooth or rib or two or
more teeth or ribs between each space. This roll I use as the slow roll. The fast
moving roll may be of the ordinary standard corrugation. The distances between
each tooth or rib or group of teeth or ribs of the slow moving roll is preferably
about one quarter of an inch. Each tooth or rib has but a slight elevation just
sufficient to form a shoulder for the grain to catch against where it is held while the
fast roll produces the reduction.
By this arrangement of alternate teeth or ribs and spaces there are formed
reservoirs for the accumulation of middlings so that in the reduction they are not
crushed or reduced to flour. By this Invention I am enabled to break down hard
on the first break performing fully as much work in one operation as is ordinarily
done in three operations with the standard corrugation on both rollers and at the same
time I retain the requisite granular condition of the middlings, so that they are readily
purified and prepared for a further reduction into flour.
901
1000
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Roller Mills.
I JOHN MURRAY CASE of 1112 Long Street Columbus Ohio in the United
States of America, Manufacturer 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 :--
The object of my Invention is to provide a roller mill, which will produce a higher
percentage of coarse granular middlings than will such machines as hitherto arranged
or constructed and also prevent undue breaking, or cutting up of the bran and enable
the work to be done with a less number of successive breaks (or pairs of rollers) than
hitherto.
According to my Invention I provide on the periphery of one of the rollers of a
pair of rollers longitudinal ribs or teeth or projections with cavities or spaces between
for holding the middlings. This roll or roller is preferably driven at a lower
speed than the other roller of the pair, which other roller may be of the ordinary
construction, having a serrated periphery. Each tooth or rib may be subdivided
longitudinally, or if desired, groups of teeth may be arranged, at suitable distances
apart, round the roller. The distances between the teeth or ribs or group of teeth or
ribs of the slow moving roll is preferably about one quarter of an inch. The teeth
or ribs project above the general surface of the roller, just sufficient to form
shoulders for the grain to catch against, and hold it while the fast roller effects its
[Prindl

page_text: reduction. The accompanying drawing, illustrates in transverse section, a portion of
a pair of rollers shewing the application of my Invention thereto.
A is the fast driven roller; the periphery of which is serrated in the usual
manner, and B is the other or slowly-driven roller provided with longitudinal teeth
ribs or projections b according to my Invention. The relative speeds of rotation
of the rollers A and B may be arranged as required but I prefer to give four
revolutions of the roller A to one revolution of the roller B. The ribs & may be
formed on or attached to the surface of the roller B and are preferably a quarter
of an inch apart or thereabouts. All the ribs may be as at or some or all of
them may be subdivided or recessed longitudinally as shewn at 2 or the said ribs.
may be arranged in clusters as shewn at 63, spaces a of say about a quarter of an
inch wide being left between each cluster of ribs.
The recesses or spaces between the ribs form receivers or reservoirs for the
accumulation of middlings so that in their reduction they are not crushed or reduced.
to flour. By my Invention 1 am enabled to perform in one operation as much work
as is ordinarily done in three operations in mills of the usual construction, having
both rollers serrated like the roller A and I retain the requisite granular condition
of the middlings, so that they are readily purified and prepared for a further reduction
into flour.
.
Having now particularly described and ascertained the nature of my said Invon-
tion and in what manner the same is to be performed, 1 declare that what I
claim is :―
In roller mills for reducing middlings, the combination with a serrated roller,
of a roller, having longitudinal teeth ribs or projections arranged on the periphery
of the roller, spaces being provided between the teeth or clusters of teeth to receive
the middlings, while being reduced, substantially as herein before described with
reference to the accompanying drawing.
Dated this 20th day of February 1800
J. H. JOHNSON & Co.,
Agents.