IMPROVEMENTS IN ROLLER MILLS
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by the said John Auguste Arnold
Buchholz at the Office of the Commissioners of Patents on the 23rd July
1880.
JOHN AUGUSTE ARNOLD BUCHHOLZ, of Vauxhall, in the County of Surrey,
Engineer. IMPROVEMENTS IN ROLLER MILLS."
"
The object of this Invention is to render those roller mills in which the feed from
one pair of rollers has to be conducted through the delivery of the crushed meal
from another pair of rollers more practicable than hitherto, by providing an efficient
arrangement of mechanism for the delivery of the crushed meal from one pair in
such manner as not to interfere with the feed to another pair, while at the sume
time it enables the miller to test the action of his grinding or crushing rollers at
their opposite ends, and thereby to determine whether the rollers are set parallel to
each other or not.
Supposing the Invention to be applied to a three roller mill, I feed the mill in
any approved manner with two streams of corn, one of which will pass in one
direction between the upper and middle roller, and the other in the opposite
direction between the middle and lower roller.
At the delivery side of each roller of the upper pair I fit upper and lower scrapers
for clearing thein of any meal that may adhere thereto, and ensuring its discharge
into a trough to which the lower scraper inay be attached. This trough may be
conveniently carried by swinging arms for the purpose to be presently explained.
Fitted in the trough, and running from end to end thereof, is a spindle furnished
with right and left handed screw blades for traversing the meal as it is received
from the rollers to shutes leading from the opposite ends of the trough down to a
common receiver.
to enable the miller to
The object of thus dividing the meal into two streams
estimate by the feel of the meal whether the rollers are working parallel to each
other and with the same amount of pressure at both ends thereof.
Rotary motion may be given to the spindle by means of a friction wheel keyed
to the spindle at the point where the screw blades meet, and pressing against the

page_text: lower roller of the pair. It is for the purpose of securing proper friction contact
between the wheel and the roller that the trough is carried by swinging arms,
which will admit of elastic pressure being applied to them to hold the friction wheel
in contact with the rotating roller.
The spindle may also be driven if preferred through a driving pulley keyed onto
an extended end of the spindle.
To ensure the second feed passing the trough a guard is placed over it, and the
feed descending to the bite of the lower rollers is guided thereto in any approved
manner. Similar arrangements of trough and screw blades will be applied for every
additional roller beyond three at the delivery side of the lower rollers, for the
purpose of testing the fineness of the meal at the opposite ends of the rollers.
As the position of the middle roller in the three roller mill is fixed, it will be
understood that the upper and lowermost rollers only require adjustment; the mode
of adjusting these, both for position and for pressure, will be well understood by
millers acquainted with the "Mechwart" arrangement of roller mill.
From the foregoing remarks it will be obvious that my improvement is not
limited to the three roller mill, but is equally applicable to all roller mills where
the feed from one pair of rollers has to be conducted through the delivery of the
crushed meal from another pair of rollers.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Auguste Arnold Buchholz in the Great Seal Patent Office on
the 22nd January 1881.
JOHN AUGUSTE ARNOLD BUCHHOLZ, of Vauxhall, in the County of Surrey,
Engineer. "IMPROVEMENTS IN ROLLER MILLS."
The object of this Invention is to render those roller mills in which the feed from
one pair of rollers has to be conducted through the delivery of the crushed meal
from another pair of rollers more practicable than hitherto, by providing an efficient
arrangement of mechanism for the delivery in opposite directions of the crushed
meal from one pair of rollers in such manner as not to interfere with the feed to
another pair.
Supposing the Invention to be applied to a three-roller mill, feed the mill in
any approved manner with two streams of corn, one of which will pass in one
direction between the upper and middle rollers, and the other in the opposite
direction between the middle and lower rollers.
At the delivery side of each roller of the upper pair, I fit upper and lower
scrapers for clearing them of any meal that may adhere thereto, and ensuring its
discharge into a trough, to which the lower scraper may be attached.
This trough
may be conveniently carried by bracket pieces attached to the side frames of the
machine.
Fitted in the trough, and running from end to end thereof, is a spindle furnished
with right and left handed screw-blades for traversing the meal as it is received
from the rollers in opposite directions to shutes leading from the opposite ends of
the trough down to a common receiver.
This arrangement will be understood by reference to the accompanying Drawing,
Fig. 1 being a longitudinal vertical section of the trough fitted with a spindle
furnished with right and left handed screw-blades; Fig. 2, a sectional elevation,
taken on the line x, x, of Fig. 1, and, Fig. 3, a diagram shewing the position of the
trough and scrapers with respect to the upper pair of rollers and the feed for the
lower pair of rollers.
A is the trough, situated on the delivery side of the upper pair of crushing rollers,
for the purpose of receiving the flour and meal; B is the spindle, running
longitudinally of the trough, and furnished with right and left handed screw-
blades for traversing the meal to the opposite ends of the said trough, where
it falls into shutes formed by casings C, C, which shutes lead into a common
receiver.
Motion is imparted to the spindle B, furnished with its right and left handed
screw-blades, through a V shaped pulley D, keyed to one end of the spindle B, and
driven by a gut band passing over a corresponding pulley on the end of the axle of
one of the crushing rollers.
The casings C, C, which form the shutes, and in which the spindle B has its
bearings, may be conveniently fitted with hinged covers, such as that shewn at D¹,
for the purpose of sampling the meal or inspecting the interior of the casings. These
casings C, C, are also furnished with needle lubricators E, E, for conveying a
lubricant to the bearings of the spindle B.
It will thus be seen that on rotary motion being imparted to the spindle B,
the meal delivered into the trough A will be traversed in opposite directions
by the right and left handed screw-blades with which the spindle B is furnished.
The object of thus dividing the meal into two equal streams is to enable the
miller to estimate by the feel of the meal whether the crushing rollers are
working parallel to each other and with the same amount of pressure at both ends
thereof.

page_text: By means of this arrangement of feed divider rollers of any length may be
employed, and the accuracy of their adjustment may be tested with facility.
If desired, rotary motion may be given to the spindle B by means of a friction
wheel (not shewn in the Drawing), keyed to the spindle at the point where the
screw-blades meet, and pressing against the lower roller of the upper pair. For the
purpose of securing proper frictional contact between this wheel and the said roller,
the trough A may be carried by swinging arms, which will admit of an elastic
pressure being applied to them to hold the friction wheel in contact with the
rotating roller.
To ensure the second feed passing clear of the trough A, a guard I (see Fig. 3)
is placed over it, and the feed descending beneath the trough A to the bite of the
lower rollers, is guided thereto in any approved manner. Similar arrangements of
trough and screw-blades will be applied for every additional roller beyond three at
the delivery side of the lower rollers, for the purpose of testing the fineness of the
neal at the opposite ends of the rollers.
As the position of the middle roller in the three roller mill is fixed, it will be
understood that the uppermost and lowermost rollers only require adjustment. The
mode of adjusting these, both for position and for pressure, will be well understood
by millers acquainted with the "Mechwart" arrangement of roller mill.
From the foregoing remarks it will be obvious that my improvement is not
limited to the three roller mill, but is equally applicable to all roller mills where the
feed from one pair of rollers has to be conducted through the delivery of the crushed
ineal from another pair of rollers.
Having now set forth the nature of my said Invention of "Improvements in
Roller Mills," and explained the manner of carrying the same into effect, I
wish it to be understood that under the above in part recited Letters Patent
I claim,-
The means, substantially as herein shewn and described, for discharging the meal
at opposite ends of the crushing rollers, whereby the miller is enabled to test
the adjustment of rollers of any length through the meal delivered at opposite ends.
thereof.
In witness whereof, I, the said John Auguste Arnold Buchholz, have
hereunto set my hand and seal, the Twenty first day of January, in the
year of our Lord One thousand eight hundred and eighty one.