Improvements in Roller Grinding Mills.
Year: 1891

page_text: Date of Application, 7th Jan., 1891
Complete Specification Left, 26th May, 1891-Accepted, 27th June, 1891
PROVISIONAL SPECIFICATION.
Improvements in Roller Grinding Mills.
We, JAMES JONES and ALDRED JAMES JONES, Millers both of the Town of
Thorold in the County of Welland in the Province of Ontario Canada, do hereby
declare the nature of this invention to be as follows:-
This invention relates to improvements in roller grinding mills of the character
which we communicated to Henry Birkbeck and for which the said Henry
Birkbeck received Letters Patent in Great Britain dated the 23rd November 1889
No. 18816.
Our present improvements consist in arranging constructing and mounting a
stationary roller (adjustable either vertically or horizontally or both in suitable
bearings in a suitable frame or standard or otherwise as desired) which stationary
roller has a number of flat surfaces or faces forming its outer surface or periphery
such flat surfaces being also corrugated or fluted or furrowed as desired.
These flat grinding surfaces on this stationary roller may be successively moved
round and brought opposite the revolving roller or rollers so as to act in conjunction
therewith to grind to any required degree of fineness.
Thus this stationary roller may be adjusted on its axes so as to present a different
flat grinding surface to the revolving roller-the said rollers being also capable of
adjustment to vary their vertical relations and their distances apart-whereby
different faces of the said stationary roller may be brought into use or different
parts of the said faces.
Doted this 7th day of January 1891.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Patentees.
COMPLETE SPECIFICATION.
Improvements in Roller Grinding Mills.
We JAMES JONES and ALDRED JAMES JONES, Millers both of the Town of
Thorold in the County of Welland in the Province of Ontario Canada 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:
This invention relates to improvements in roller grinding mills of the character
which we communicated to Henry Birkbeck and for which the said Henry Birkbeck
received Letters Patent in Great Britain dated the 23rd November 1889
No. 18816, and the object of our present invention is first to design a stationary
roll composed of a series of flat corrugated grinding surfaces which may be adjusted
to present to the revolving roll any one of the series of grinding surfaces when the
other of them is worn out and secondly to provide means to adjust the stationary
roll vertically so as to utilize the whole of each grinding surface.
The drawing is a perspective view showing the parts involved in our invention.
We find in practice that middlings produced from the contact of the revolving
roll with a flat corrugated surface are of a much finer grade than when produced
by a revolving roll with a surface following the periphery of the roll and it is with
the object of providing a series of flat corrugated surfaces which may be readily

page_text: substituted one for the other and adjusted each vertically when a portion of the
surface is worn out that our invention is chiefly designed.
In the drawing similar letters of reference indicate corresponding parts.
A is the stationary roll the periphery of which is divided into a series of flat
surfaces a which extend longitudinally from end to end of the roll each surface a
being corrugated as shown. The roll A is held in the bearing boxes B which are
vertically adjustable in the frames C by the screw spindles D which support the
bearing boxes B and are operated by the hand wheels E. The bearing boxes B
are grooved as shown to receive the inner ribs in the frames C. These ribs are
fixed to the inner faces of the vertical sides of the frames. The frames C have slots c
cut in their bases through which the set screws d pass in order to provide a ready
means of adjustment to suit the class of work intended to be passed through the
rolls.
F is the revolving roll which is held in the bearing boxes G which are adjusted
to and from the stationary roll by the screw spindles H in the manner as described
in our former Patent hereinbefore referred to."
It will be seen that as the bearing boxes B are raised or lowered a different
portion of one of the flat corrugated grinding surfaces a is contiguous to the
revolving roll F. Consequently if the stationary roll A is set so that the revolving
roll F operates on the upper portion of the surface A. next to it and that portion
of the surface becomes worn the roll A. may be adjusted by the screw spindles D so
that another portion of the surface is contiguous to the revolving roll so as to
operate upon the work and so on until the whole of the surface a is worn out when
the caps of the bearing boxes B may be loosened and the roll turned sufficiently to
bring into play another of the series of flat grinding surfaces a.
Although we show the revolving roll with longitudinal ratchet shaped furrows it
will be understood of course that we may use a revolving roll of any desired surface
to operate with our stationary roll.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what
we claim is-
1. In combination the revolving grinding roll the stationary roll having a series of
flat grinding faces means for adjustably holding the stationary roll so that it may
be adjusted on its axis to present different grinding faces to the grinding roll the
said rolls being adjustable to vary their vertical relation and their distance apart
whereby different faces of the stationary roll may be brought into action and
different parts of the said faces substantially as described.
2. In combination the revolving grinding roll the stationary roll the main frame
the open frames C adjustable thereon to and from the revolving roll and the bearing
boxes B adjustable vertically within the frames C and upon the inner faces of the
vertical sides substantially as described.
Dated this 26th day of May 1891.
TONGUE & BIRKBECK,
34, Southampton Buildings, Chancery Lane, London, W.C.,
Agents for the Patentees.