An Improved Mill for Grinding or Disintegrating.
Year: 1890

page_text: Date of Application, 18th Oct., 1890-Accepted, 22nd Nov., 1890
COMPLETE SPECIFICATION.
An Improved Mill for Grinding or Disintegrating.
I, RUPERT WINTER, of Kleinmünchen-Linz, in the Empire of Austria, Master
Miller, 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 this invention is a mill for grinding or disintegrating by means
of which a higher effect is attained than by the machines termed "Dismembrators"
or Disintegrators." In the improved machine the grain is disintegrated in such
a sparing manner as to allow of its being employed also in modern mill
arrangements.
Reference being had to the accompanying drawing.
Figs. 1 and 2 is an inner view of the two discs A and B.
Fig. 3 represents a diametrical section of the said discs, which illustrates how the
latter engage with and for one another.
Fig. 4 is a concentric section illustrating the gearing of the teeth as well as also the
manner in which the same cover each other in concentrical direction.
Fig. 5 is a partial perspective view of a grinding disc illustrating more particularly
the construction of the teeth.
The working parts of the improved machine, which I propose to term "Commolator,"
are the two discs A and B Figs. 1 and 2, lodged either horizontally or vertically and
made according to the character of the material to be disintegrated from hard or soft
cast metal. The machine may be so arranged that either both discs are revoluble or
the disc A is stationary and the disc B capable of rotation.
"
If both discs are revoluble, each is carried by a separate shaft, which is
lodged and operated in the same manner as with disc mills. In the other case
referred to the disc A is secured by screws to that side of the casing to which
the inlet pipe is attached, while the rotary disc is wedged and screwed on a shaft
with gear.
The material to be disintegrated is supplied to the machine about the centre of
the discs. Each of the grinding discs is provided with a suitable number of con-
centrically arranged rings or teeth abcdef.. Each of these rings is again
toothed in the concentrical direction in such a manner that the recesses between
these teeth ghijk somewhat surmount the base surface C of the disc as shown
in Fig. 5. Thereby sharp edges 1-2, 3-4, Fig. 5, are formed which serve to
loosen or detach the material to be ground. The length of the concentrically
arranged teeth ghijk is preferably 20 millimetres and. that of the interstices
between each two teeth 14 millimetres.
The disc A is provided about the inlet aperture with a ring R without teeth
which forms at that place a closing between the two discs and thereby prevents
larger bodies from penetrating between the working parts of the discs.
The discs are so mounted as to cause the teeth to exceed each other in concentric
direction by about a quarter of their length as illustrated by Fig. 4.
By the peculiar construction of the machine i.e. of the "Commolator" discs,
the following operation is attained. Owing to the uniform concentric arrangement
of the rings a bed... on the whole surface of the discs, the injurious throwing
of the material to be ground is reduced to a minimum, while the radial and
concentric disposition of the teeth results in the following combined operation,
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a) a breaking action along the vertical edges of the teeth.
b) a squeezing and frictional action along the side of the teeth, and
c) a loosening, detaching, action along the horizontal edges.
It is therefore evident, that the improved machine or
Commolator"
possesses a

page_text: far greater working capacity than any other machine of this system, as it unites
several operations and renders a detacher superfluous. Moreover the expenditure
of power is reduced by the means which produce the breaking and shearing action
coming into operation under most favourable circumstances, that is to say attaining
the highest effect.
In the improved machine, also the formation of air-whirls which considerably
impair the effect in the ordinary disintegrators, is completely obviated, the air
that enters through the inlet aperture participating in the rotary movement, owing
to the concentric rings, thereby favouring the latter and simultaneously produces
energetic ventilation by the increased velocity towards the periphery.
Commolators with one stationary and one movable disc are particularly adapted
-for-separating the bran and pollards, furthermore to serve as detachers for material
ground by cylinders and for grinding-cement.
:
"Commolators" with two movable discs serve in general-for-grinding granular
substances.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is:
A mill .or "Commolator" for grinding or disintegrating essentially consisting of
horizontally or vertically lodged discs A B, of which, A is stationary or revoluble and
between which the material to be disintegrated is introduced from the centre, and
having a ring without teeth R determining the admission to the grinding surfaces
and concentric rings a b c . . adapted to catch into and for each other and being
so toothed that the base of the interstices between the teeth surmounts the base surface
of the discs, whereby the sharp edges 1-2, 3-4. are formed, which serve for
loosening the material being ground or disintegrated while such material is broken at
the upright edges of the teeth and squeezed and rubbed at the lateral surfaces, substan-
tially as set forth.
Dated this 18th day of October 1890
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