Improvements in or Applicable to Edge Runner Mills for Crushing or Grinding Cement, Ores, and the like.
Year: 1889

page_text: Date of Application, 31st Jan., 1889
Complete Specification Left, 28th Oct., 1889-Accepted, 30th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in or Applicable to Edge Runner Mills for Crushing
or Grinding Cement, Ores, and the like.
1 WILLIAM ROLAND TAYLOR of No. 2 Star Hill Villas Rochester in the County
of Kent Engineer, do hereby declare the nature of this Invention to be as
follows:-
My Invention has for its object to provide roller Mills for crushing or grinding
cement ores and the like with improved means for removing the crushed or ground
material from the mill as soon as it is sufficiently reduced whereby the efficiency of
the Mill is considerably increased, and consists in the application of a blast or blasts
of air to act on the sufficiently crushed or ground material to drive it from the
crushing surface away from the coarse or insufficiently ground material so that the
rollers or runners do not pass over the material which has already been sufficiently
ground whilst that which is not sufficiently ground remains to be further reduced by
the rollers or runners thereby giving greater grinding capacity to the Mill.
In carrying out my Invention I provide beneath the bed plate or any other con-
venient part of the Mill one or more blast pipes which discharge the blast into an
air chamber preferably fixed so as to rotate with the Mill spindle from which air
chamber several pipes are arranged to convey the blast to and follow the motion of
each roller or Runner as they revolve round the Mill or if desired the blast chamber
and pipes may be stationary. Valves are provided for adjusting to the greatest nicity
the strength of the blast as required.
Dated this 21st dos of Tan
J. H. JOHNSON & Co.;
47, Lincoln's Inn Fields, London, Agents.
COMPLETE SPECIFICATION.
Improvements in or Applicable to Edge Runner Mills for Crushing
or Grinding Cement, Ores, and the like.
I WILLIAM ROLAND TAYLOR of No. 2 Star Hill Villas Rochester in the County
of Kent Engineer 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 :-
My Invention has for its object to provide mills such as are employed in grinding
cement grinding or crushing ores and other hard and brittle substances with means
for readily removing out of the range of the crushing or grinding surfaces the
sufficiently reduced material so as not to impede the action of the crushing surfaces
upon the insufficiently reduced material whereby the efficiency of the crushing or
grinding mill is considerably increased.
.
According to my Invention I cause a blast or blasts or current or currents of air
to be directed from any suitable air forcing device into the partially crushed or
ground material as it is being acted on by the crushing surfaces the said air removing
from the track of the grinding surfaces the sufficiently ground portion of the material
from the insufficiently ground portion which latter remains in position to be again
operated on by the crushing or grinding surfaces.
A convenient way of carrying out my Invention is illustrated in the accompanying
drawing which illustrates in sectional elevation an edge runner mill provided with
my improvements but I wish it to be understood that I do not restrict myself to the
arrangement shewn and described-A is the bed plate or surface on which the
material to be crushed is fed by hand or otherwise. B are the edge runners any

page_text: desired number of which may be employed, the drawing represents a mill having
four runners mounted on arms C hinged at c to a boss Ď fast on the mill spindle E.
The mill may be driven by any suitable means.
On the bed plate A is a boss or projection a through which the mill spindle E passes
this boss being provided with a circular groove or recess 6 to receive the lower edge
or rim of an inverted cup or bell F fast on the mill spindle E.
A space G is left
botween the projection a on the bed plate and the crown of the inverted cup or bell F
which space forms a chamber into which air is forced through a pipe or passage e con-
nected with a fan or other air forcing device and passing through the projection a into
the said chamber G. Connected to the bell or inverted cup F are pipes H corre-
sponding in number to the number of edge runners used the outer ends of which
pipes extend to and beneath the said edge runners at the rear thereof and being
fast to the mill spindle follow the edge runners in their traverse over the bed
plate A.
•
When the mill is at work a continuous blast or continuous blasts of either hot or
cold air is or are forced through the pipe or pipes e into the chamber G whence the air
passes through the pipes H to the rear of the edge runners and acting on the material
over which the runners have passed drives from the partially crushed material the
finer portions thereof out of the track of the runners, leaving the other or
insufficiently reduced material in position to be again acted upon by the runners, the
sufficiently reduced material being constantly removed as soon as it is formed thereby
considerably increasing the efficiency of the mill the action of which is not unneces-
sarily impeded as heretofore by the sufficiently ground material. If desired scrapers
may be used in combination with the air blasts to loosen the material after the runners
have passed over it so that the finer portions may be more readily acted on by the
blasts.
The power of the air blasts may be regulated as desired according to the degree of
fineness of the material required to be separated from the coarser material.
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 :-
1st. In combination with apparatus for crushing or grinding cement ores and the
like means for creating and applying currents or blasts of air for removing out of the
way of the grinding surfaces the material which has been sufficiently reduced the
insufficiently reduced portion of the material remaining in position to be again acted
upon by the grinding surfaces substantially as hereinbefore described.
2nd. In or connected with edge runner mills an air chamber into which air is
forced and from which it is conducted to the rear of the runners substantially
as and for the purpose herein before described with reference to the accompanying
drawing.
3rd. The general construction combination and arrangement of parts constituting
an apparatus for crushing or grinding cement ores and the like and for separating the
finer from the coarser material substantially as herein before described and illustrated
by the accompanying drawing.
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